Patent Abstract:
A method of forming a low gloss, high solids polyurea coating containing very low volatile organic compounds (VOC) in the coating composition. The low volatile content not only makes the coating environmentally friendly but allows it to be applied at variable thickness levels and over a wide variety of environmental conditions. The coating composition is comprised of an isocyanate reactive agent containing a secondary diamine, a polyisocyanate, a gloss reducing agent and a viscosity modifier. The gloss reducing agent is generally pre-mixed into an isocyanate reactive agent containing a secondary diamine and/or polyisocyanate containing the viscosity modifier before mixing the two components together to form a low gloss polyurea coating.

Full Description:
[0001]    This application claims of the benefit of Application No. 61/760,688, filed on Feb. 5, 2013. The disclosure of Application No. 61/760,688 is hereby incorporated by reference. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    Polyurea coatings are known in the industry for fast curing, ability to cure at wide temperature/humidity range and excellent performance properties. Polyurea coatings are very versatile and have wide-ranging applications as commercial and industrial protective coatings, and some aliphatic polyureas are used as decorative coatings on walls, floors and other surfaces. Most polyurea coatings are two component thermoset systems that can be applied as a thick coating in one pass if a high solids formulation is used, but usually the applied finish tends to be high in reflectivity or gloss. It is very difficult to reduce or downgloss high solids polyurea coating even with high loadings of gloss reducing agents because such coatings tend to have high viscosity and cure very quickly. 
         [0003]    There are applications where a low gloss finish is required for functional or decorative purposes because they are aesthetically preferred. In general, low gloss industrial or commercial coating formulations tend to be low solids, water or solventborne systems and usually contain high loadings of gloss reducing agents such as inorganic silica. To attain low gloss in clear coats, coating compositions are loaded with an excess amount of gloss reducing agent, typically more than 10 weight percent based on the total weight of the composition of the gloss reducing agent. Unfortunately, the gloss reducing agent in these excessively loaded coating compositions tends to coagulate. As a result, the conventional low gloss coatings resulting therefrom can have visually unacceptable cloudy or seedy appearance. Furthermore, the presence of the excessive amount of these gloss reducing agents in a coating composition tends to make the resultant coatings more brittle than conventional coating compositions. Another limitation of the current low gloss waterborne or solventborne coatings are their ability to achieve a thick coating in one pass or application at wide temperature/humidity range because of the high water or solvent content in the formulations. Thus, a need exists in this art for durable low gloss coatings that can be applied in one pass and having a desirable appearance. 
       BRIEF SUMMARY OF THE INVENTION 
       [0004]    The instant invention can solve problems with conventional coatings by providing a high solids polyurea coating having a low gloss value. By “low gloss value” it is meant a gloss value of less than about 50 when measured in accordance with ASTM D-523 and using a glossmeter at an angle of 60° to a coated surface (e.g., a gloss of less than about 50 including about 45 to about 25; and about 40 to 25). By “high solids” it is meant greater than about 70% by weight solids including about 75 to about 95; and about 80 to about 90. 
         [0005]    One aspect of the invention relates to a low gloss, high solids polyurea coating that maintains the handling and performance of typical polyureas coatings such as rapid return to service, ability to cure at a wide temperature/humidity range and excellent physical properties. In addition, the inventive low gloss coating can be applied at up to about 30 mils dry film thickness at one pass by using conventional application methods such as a roller, brush or spray and still maintain the gloss value of less than 45 (at 60° angle) when the coating is applied and cured at 5° C. to 35° C. temperature and from 10% to 90% relative humidity. 
         [0006]    One aspect of the invention relates to a non-aqueous coating composition comprising:
       A. An isocyanate reactive agent comprising at least one secondary diamine wherein the secondary diamine comprises the reaction product of at least one diamine and alkyl esters of 2-butendioic acid;   B. optionally at least one polyisocyanate resin;   C. optionally at least one gloss reducing agent; and   D. At least one viscosity modifier; wherein C) and D) comprise less than about 35% by weight of the total coating composition. By “non-aqueous” it is meant that the coating composition comprises less than about 1 weight percent water and typically about 0 weight percent water.       
 
         [0011]    Another aspect of the invention relates to a composition comprising: a reaction product of at least one diamine and alkyl esters of 2-butendioic acid; and at least one solvent. 
         [0012]    A further aspect of the invention relates to a coating composition comprising at least one isocyanate reactive agent, at least one organic polymer, at least one gloss reducing agent and at least one solvent. 
         [0013]    Another aspect of the invention relates to a composition comprising at least one viscosity modifier, and the reaction product of bis(4-aminocyclohexyl)methane and an ethyl ester of 2-butendioic acid. 
         [0014]    A further aspect of the invention relates to a composition comprising at least one viscosity modifier, and the reaction product of bis(4-amino-3-methylcycohexyl)methane and an ethyl ester of 2-butendioic acid. 
         [0015]    The various aspects of the invention can be used alone or in combinations with each other. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0016]    The instant invention relates to coating compositions and coatings that can be advantageously used to provide protection such as resistance to abrasion, impact, chemical, stain and UV, to a variety of substrates and/or can be used for decorative purposes to enhance the appearance of a certain surface. 
         [0017]    The term “coating composition” refers to an uncured fluid composition that is sprayable or that can be brushed/rolled onto a substrate, or into which the substrate can be dipped. The term coating refers to a layer that is derived from the coating composition and is substantially free from water and/or solvent and that has undergone curing in an amount effective to form a thermoset film. The phrase “substantially free from water” means a coating composition comprising less than about 1 weight percent water and typically about 0 weight percent or non-aqueous. A protective coating as defined as one that is disposed directly or indirectly upon the substrate and can comprise one or more layers, one of which is derived from the coating composition. The term “disposed indirectly” refers to a coating that is separated from the substrate by other layers, while the term “disposed directly” refers to layers that in intimate physical contact with the substrate. While any suitable substrate can be coated, examples of such substrates including at least one of concrete, wood, metal, plastic, composites, among other suitable substrates. 
         [0018]    Organic polymers that can be used in the coating composition as well as in the coating comprise at least one member selected from the group consisting of thermoplastic polymers, thermosetting polymers, or blends and copolymers of thermoplastic polymers with thermosetting polymers. Examples of suitable organic polymers are dendrimers, elastomers, ionic polymers, copolymers such as block copolymers, graft copolymers, random copolymers, star block copolymers, or the like. Exemplary organic polymers are thermosets. An exemplary thermoset comprises a polyurea. 
         [0019]    The organic polymers can comprise at least one member selected from the group consisting of polyacetals, polyureas, polyurethanes, polyolefins, polyacrylics, polycarbonates, polyalkyds, polystyrenes, polyesters, polyamides, polyaramides, polyamideimides, polyarylates, polyarylsulfones, polyethersulfones, polyphenylene sulfides, polysulfones, polyimides, polyetherimides, polytetrafluoroethylenes, polyetherketones, polyether etherketones, polyether ketone ketones, polybenzoxazoles, polyoxadiazoles, polybenzothiazinophenothiazines, polybenzothiazoles, polypyrazinoquinoxalines, polypyromellitimides, polyquinoxalines, polybenzimidazoles, polyoxindoles, polyoxoisoindolines, polydioxoisoindolines, polytriazines, polypyridazines, polypiperazines, polypyridines, polypiperidines, polytriazoles, polypyrazoles, polycarboranes, polyoxabicyclononanes, polydibenzofurans, polyphthalides, polyacetals, polyanhydrides, polyvinyl ethers, polyvinyl thioethers, polyvinyl alcohols, polyvinyl ketones, polyvinyl halides, polyvinyl nitriles, polyvinyl esters, polysulfonates, polysulfides, polythioesters, polysulfones, polysulfonamides, polyureas, polyphosphazenes, polysilazanes, polyolefins, polysiloxanes, fluoropolymers, polybutadienes, polyisoprenes, or a combination comprising at least one of the foregoing organic polymers. Exemplary organic polymers are polyureas. It is desirable for the polyurea to be a thermoset. The aforementioned organic polymers listed above can be blended and/or copolymerized with the polyurea if desired. The amount of organic polymer typically ranges from about 70% to about 95% by weight of the coating composition. 
         [0020]    The coating composition also comprises at least one isocyanate reactive agent comprising at least one secondary diamine formed by reaction of diamines with alkyl esters of 2-butendioic acid. The secondary diamine product has the general formula (I): 
         [0000]      R 1 O 2 CCH 2 CH(CO 2 R 2 )NH—X—NHCH(CO 2 R 3 )CH 2 CO 2 R 4   (I)
 
         [0000]    wherein R 1 , R 2 , R 3 , and R 4  are the same or different and each are alkyl groups having an amount of about 1 to about 12 carbon atoms. 
         [0021]    In one embodiment, the alkyl groups of the secondary diamine product have an amount of 1 to about 4 carbon atoms. An exemplary alkyl group is an ethyl group. R 5  can be aliphatic, alicyclic, or aromatic. X− represents a divalent hydrocarbon group obtained by the removal of the amino groups from at least one of 1,4-diaminobutane, 1,6-diaminohexane, 2,2,4- and/or 2,4,4-trimethyl-1,6-diaminohexane, 1-amino-3,3,5-trimethyl-5-aminomethyl-cyclohexane, bis(4-aminocyclohexyl)methane, bis(4-amino-3-methylcycohexyl)methane, ethylene diamine, 1,2-diaminopropane, 1,4-diaminobutane, 2,5-diamino-2,5-dimthylhexane, 1,11-diaminoundecane, 1,12-diaminododecane, 2,4 ‘and’ or 2,6-hexahydrotoluyene diamine, 2,4- and/or 2,6-diaminotoluene and 2,4- and/or 4,4′ diaminodiphenyl methane, and polyetherdiamines. The amount of the isocyanate reactive agent typically ranges from about 20 to about 70 wt %; including about 25 to about 65 wt %; and about 30 to about 60 wt % of the coating composition. The amine equivalent weight can range from about 100 to about 500 including about 150 to about 450; and about 200 to about 400. 
         [0022]    The coating composition can also comprise at least one polyisocyanate that comprises of an isocyanate functional compound having the general formula: 
         [0000]      R(NCO) i,   (II)
 
         [0000]    wherein R is an organic radical having the valence of i, wherein i is greater than or equal to about 2. R can be a substituted or unsubstituted hydrocarbon group (e.g., a methylene group or an arylene group). 
         [0023]    The isocyanates can be aromatic or aliphatic. Useful aromatic diisocyanates can comprise, for example, 2,4-toluene diisocyanate and 2,6-toluene diisocyanate (each generally referred to as TDI); mixtures of the two TDI isomers; 4,4′-diisocyanatodiphenylmethane (MDI); p-phenylene diisocyanate (PPDI); diphenyl-4,4′-diisocyanate; dibenzyl-4,4′-diisocyanate; stilbene-4,4′-diisocyanate; benzophenone-4,4′-diisocyanate; 1,3- and 1,4-xylene diisocyanates; or the like, or a combination comprising at least one of the foregoing aromatic isocyanates. Exemplary aromatic diisocyanates for the preparation of polyurethane prepolymers include TDI, MDI, and PPDI. 
         [0024]    Useful aliphatic diisocyanates can comprise, for example, 1,6-hexamethylene diisocyanate (HDI); 1,3-cyclohexyl diisocyanate; 1,4-cyclohexyl diisocyanate (CHDI); the saturated diphenylmethane diisocyanate known as H(12)MDI; (also known commercially as bis{4-isocyanatocyclohexyl}methane, 4,4′-methylene dicyclohexyl diisocyanate, 4,4-methylene bis(dicyclohexyl)diisocyanate, methylene dicyclohexyl diisocyanate, methylene bis(4-cyclohexylene isocyanate), saturated methylene diphenyl diisocyanate, and saturated methyl diphenyl diisocyanate), isophorone diisocyanate (IPDI); or the like; or a combination comprising at least one of the foregoing isocyanates. An exemplary aliphatic diisocyanate is H(12)MDI. 
         [0025]    Other exemplary polyisocyanates include hexamethylene diisocyanate (HDI), 2,2,4- and/or 2,4,4-trimethyl-1,6-hexamethylene diisocyanate, dodecamethylene diisocyanate, 1,4-diisocyanatocyclohexane, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (IPDI), 2,4′- and/or 4,4′-diisocyanato-dicyclohexyl methane, 2,4- and/or 4,4′-diisocyanato-diphenyl methane and mixtures of these isomers with their higher homologues which are obtained by the phosgenation of aniline/formaldehyde condensates, 2,4- and/or 2,6-diisocyanatotoluene and any mixtures of these compounds. Higher functional hexamethylenediisocyanate (HDI) polyisocyanates such as biurets, trimers, and dimers, was found to be particularly useful for purposes of the present invention. The amount of polyisocyanate typically ranges from about 10 to about 60 wt % including about 25 to about 55 wt %; and about 20 to about 50 wt % of the coating composition. 
         [0026]    In one aspect of the invention, R in the formula (II) can also represent a polyurethane radical having a valence of i, in which case R(NCO)i is a composition known as an isocyanate-terminated polyurethane prepolymer or semi-prepolymer. Prepolymers or semi-prepolymers are formed when an excess of organic diisocyanate monomer is reacted with an active hydrogen containing component. 
         [0027]    The inventive composition can comprise at least one gloss reducing agent. Examples of suitable gloss reducing agents comprise fine particle powders of organic and inorganic materials, urea-formaldehydes, silicas such as, for example, precipitated silica and fumed silica, polymeric beads, talc, alumina, calcium carbonate, or the like, or a combination comprising at least one of the foregoing gloss reducing agents. An exemplary gloss reducing agent is silica. An example of an exemplary gloss reducing agent is a fine-grained, organic treated precipitated silica. The gloss reducing agent typically have a particle size, d50 of about 0.5 μm to about 20 μm, about 1 μm to about 10 μm and in some cases about 3 μm to about 7 μm. The amount of gloss reducing agent typically ranges from about 1 to about 25 wt % including about 3 to about 20 wt %; and about 5 to about 15 wt % of the coating composition. 
         [0028]    The coating composition can also comprise of at least one viscosity modifier. A viscosity modifier can comprise at least one of polar or nonpolar solvents or non-reacting diluents. Examples of solvent comprise at least one member selected from the group consisting of hexane, heptane, xylene, toluene, cyclohexane; ester type one such as methyl acetate, ethyl acetate, t-butyl acetate, acetic acid ethylene glycol monomethyl ether, acetic acid diethylene glycol monomethyl ether, dibasic ester; ether type one such as isopropyl ether, ethylene glycol monomethyl ether, diethylene glycol monobutyl ether; ketone type such as methyl isobutyl ketone, methyl ethyl ketone, isophorone, acetophenone; carbonate type such as propylene carbonate, dimethyl carbonate; Pyrollidone type such as n-methylpyrollidone, n-ethyl pyrollidone; halogenated solvent type such as parachlorobenzotrifluoride, 1,1,2,2-Tetrachloroethane, 1,1-Dichloroethane and any other protic or aprotic solvent that are inert towards amines or polyisocyanates. Examples of non-reacting diluents comprise at least one member selected from the group consisting of phthalate type such as bis(2-ethylhexyl) phthalate, diisononyl phthalate, butyl benzyl phthalate; ester type such as dioctyl adipate, dibutyl sebacate, 1,2-Cyclohexane dicarboxylic acid diisononyl ester, 2,2,4-Trimethyl-1,3-pentanediol diisobutyrate, alkyl sulphonic acid phenyl ester; citrate types such as acetyl triethyl citrate, triethyl citrate; trimellitate type such as trimethyl trimellitate, tri-(2-ethylhexyl)trimellitate and other class of non-reacting diluents such as benzoates, sulfonamides, epoxidized vegetable oils, organophosphates, glycols, polyethers, polybutene and combinations thereof. The amount of viscosity modifier typically ranges from about 2 to about 30 wt % including about 5 to about 25 wt %; and about 10 to about 20 wt % of the coating composition. 
         [0029]    Other additives useful in the coating compositions include leveling agents, defoamers, air release agents, antioxidants, UV stabilizers, rheology modifier, pigments, dispersants, plasticizers, diluents, fillers or combinations thereof. The amount of these additives typically ranges from about 0 to about 10% including about 1 to about 5 wt %; and about 2 to about 5 wt % of the coating composition. 
         [0030]    The components of the inventive coating composition can be combined by using any suitable conventional equipment and methods. Examples of the foregoing include a blender, agitation with impellar blade, hand mixing with stirring stick, among other conventional equipment. 
         [0031]    The components of the coating composition are typically combined in the following order: 1) Isocyanate reactive agent(s), 2) viscosity modifier(s), 3) additive(s), 4) gloss reducing agent (mixed until solution is homogeneous); and 5) polyisocyanate. 
         [0032]    The various aspects of this invention can be used alone or in combination. Certain aspects of the invention are illustrated by the following Examples. These Examples shall not limit the scope of the appended claims. 
       EXAMPLES 
       [0033]    In the following examples, the gloss reducing agent was added to the secondary diamine product and dispersed in using a Flacktek Speedmixer™. The isocyanate reactive agent containing the gloss reducing agent and the polyisocyanate resin were then hand mixed together and applied directly to a Leneta chart by a drawdown bar. Unless specified, the films were dried at ambient conditions around 22° C., 50% relative humidity. The thickness of the film was about 2 to 25 mils. The gloss measurements were conducted after letting the coated film cure for at least 24 hours. The gloss measurements were conducted using ASTM D-523 test with glossmeter supplied by Byk-Gardner. 
         [0034]    The following ingredients used in the formulations are shown in Table 1: 
         [0000]    
       
         
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                 Ingredients 
                 Details 
               
               
                   
               
             
             
               
                 Secondary diamine A 
                 A reaction product of bis(4-aminocyclohexyl) 
               
               
                   
                 methane and ethyl ester of 2-butendioic acid 
               
               
                 Secondary diamine B 
                 A reaction product of bis(4-amino-3- 
               
               
                   
                 methylcycohexyl) methane and ethyl ester of 2- 
               
               
                   
                 butendioic acid 
               
               
                 Flexisolv ™ 
                 Dibasic ester solvent mixtures from Invista 
               
               
                 DBE Solvent 
               
               
                 Gloss reducer A 
                 Wax treated precipitated silica such as Acematt ® 
               
               
                   
                 OK-607 
               
               
                 Gloss reducer B 
                 Polymer treated precipitated silica such as 
               
               
                   
                 Acematt ® 3600 
               
               
                 Gloss reducer C 
                 Organic treated silica gel such as Gasil ® UV70C 
               
               
                   
                 from PQ Corporation 
               
               
                 Viscosity reducer A 
                 Propanoic acid, 2-methyl-,1,1′-[2,2-dimethyl-1-(1- 
               
               
                   
                 methylethyl)-1,3-propanediyl] ester 
               
               
                 Viscosity reducer B 
                 Alkyl sulfonic acid ester diluent 
               
               
                 Aromatic 100 
                 Light aromatic Naptha solvent consisting of 
               
               
                   
                 C9-10 dialkyl and trialkylbenzenes 
               
               
                 Sylosiv ® A3 
                 3 angstroms molecular sieve powder from Grace 
               
               
                   
               
             
          
         
       
     
       Example 1 
       [0035]    The first example shows coating compositions comprising secondary diamine product blended with solvents (i.e., dibasic esters, propylene carbonate, n-methyl pyrollidone or butyl diglyme). The gloss reducing agent is dispersed into the amine blend using a Speedmixer to form a homogeneous mixture. Then the polyisocyanate, hexamethylene diisocyanate trimer is added to the isocyanate reactive mixture at a stoichiometric ratio of 1.05 NCO to amine and hand mixed together before applying it onto a Leneta chart with a drawdown bar at two different thicknesses. The coating is cured for at least 24 hours at ambient conditions before measuring gloss with a glossmeter in accordance with ASTM D523. The data shows that all of the films had 60° gloss of less than 45. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
             
               
               
               
               
             
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
             
             
               
                   
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                   
                 1A 
                 1B 
                 1C 
                 1D 
                 1E 
                 1F 
                 1G 
                 1H 
               
               
                   
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
               
               
                   
               
               
                 Secondary Diamine A 
                 35.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 32.8 
                 32.8 
                 32.8 
               
               
                 Secondary Diamine B 
                 28.7 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 32.8 
                 32.8 
                 32.8 
               
               
                 Dibasic ester solvent: 
               
               
                 Diethyl malonate 
                 21.2 
               
               
                 Diethyl succinate 
                   
                 21.9 
               
               
                 Flexisolv DBE-LVP 
                   
                   
                 21.9 
               
               
                 Flexisolv DBE-5 
                   
                   
                   
                 21.9 
               
               
                 Flexisolv DBE-9 
                   
                   
                   
                   
                 21.9 
               
               
                 N-methyl pyrollidone 
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Butyl diglyme 
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Propylene carbonate 
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Gloss reducer A 
                 15 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
               
               
                 Amine eq. wt 
                 441 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
               
               
                   
               
             
          
           
               
                 60° Gloss Measurement of cured coating 
                   
                   
                   
               
             
          
           
               
                 Dry Film 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                 Thickness (mil) 
                 1A 
                 1B 
                 1C 
                 1D 
                 1E 
                 1F 
                 1G 
                 1H 
               
               
                   
               
               
                 5 
                 25 
                 38 
                 30 
                 29 
                 35 
                 No data 
                 No data 
                 No data 
               
               
                 10 
                 No data 
                 38 
                 32 
                 33 
                 38 
                 38 
                 42 
                 41 
               
               
                   
               
             
          
         
       
     
       Example 2 
       [0036]    Example 2 shows isocyanate reactive agent compositions comprising the secondary diamine blend, a commercial dibasic ester solvent mixture, another additive such as a non-reacting diluent, co-solvent and/or a molecular sieve and the gloss reducing agent. The low gloss coating was formed and applied using similar procedure as Example 1. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
             
               
               
               
             
               
               
               
               
               
               
               
               
             
           
               
                   
               
             
             
               
                   
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                   
                 2A 
                 2B 
                 2C 
                 2D 
                 2E 
                 2F 
                 2G 
               
               
                   
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
               
               
                   
               
               
                 Secondary Diamine A 
                 32.5 
                 32.4 
                 32.4 
                 33.7 
                 33.7 
                 36 
                 32.5 
               
               
                 Secondary Diamine B 
                 26.6 
                 26.6 
                 26.6 
                 27.6 
                 27.6 
                 29 
                 26.6 
               
               
                 Flexisolv DBE-5 
                 8.7 
                 4.4 
                 4.4 
                 8.7 
                 8.7 
                 9 
               
               
                 Other Additives: 
               
               
                 Viscosity reducer A 
                 13.8 
                 13.8 
                 13.8 
                 17.5 
                 17.5 
                 4.5 
                 13.8 
               
               
                 Viscosity reducer B 
                 5.9 
                 5.9 
                 5.9 
                   
                   
                   
                 5.9 
               
               
                 Propylene carbonate 
                   
                   
                   
                   
                   
                 9 
               
               
                 dimethyl carbonate 
                   
                 4.4 
               
               
                 Parachlorobenzotrifluoride 
                   
                   
                 4.4 
               
               
                 Xylene 
                   
                   
                   
                   
                   
                   
                 8.7 
               
               
                 Sylosiv A3 
                   
                   
                   
                   
                 0.5 
               
               
                 Gloss reducer A 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12 
               
               
                 Gloss reducer B 
                   
                   
                   
                   
                   
                 12.5 
               
               
                 Gloss reducer C 
                   
                   
                   
                   
                   
                   
                 12.5 
               
               
                 Amine eq. wt 
                 475 
                 475 
                 475 
                 430 
                 430 
                 430 
                 430 
               
               
                   
               
             
          
           
               
                 60° Gloss Measurement of cured coating 
                   
                   
               
             
          
           
               
                 Dry Film 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                 Thickness (mil) 
                 2A 
                 2B 
                 2C 
                 2D 
                 2E 
                 2F 
                 2G 
               
               
                   
               
               
                 10 
                 34 
                 34 
                 39 
                 39 
                 36 
                 41 
                 42 
               
               
                   
               
             
          
         
       
     
       Example 3 
       [0037]    Example 3 shows an isocyanate reactive agent compositions comprising the secondary diamine blend, various solvents and a gloss reducing agent. The coating was formed and applied using similar procedure as Example 1. While these solvents used in this example are effective at producing a useful coating, this Example shows that these solvents do not provide a coating having a gloss of less than 45. 
         [0000]    
       
         
               
               
               
               
               
               
               
               
               
               
               
               
               
             
               
             
               
               
               
               
               
               
               
               
               
               
               
               
               
             
           
               
                   
               
             
             
               
                   
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                   
                 3A 
                 3B 
                 3C 
                 3D 
                 3E 
                 3F 
                 3G 
                 3H 
                 3I 
                 3J 
                 3K 
                 3L 
               
               
                   
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
                 wt % 
               
               
                   
               
               
                 Secondary Diamine A 
                 48 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
                 36.1 
               
               
                 Secondary Diamine B 
                 39.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
                 29.5 
               
               
                 Solvent: 
               
               
                 Propylene glycol 
                   
                 21.9 
               
               
                 diacetate 
               
               
                 Dipropylene glycol 
                   
                   
                 21.9 
               
               
                 methyl ether acetate 
               
               
                 Ethylene glycol 
                   
                   
                   
                 21.9 
               
               
                 mononbutylether acetate 
               
               
                 Propylene glycol 
                   
                   
                   
                   
                 21.9 
               
               
                 monoethyl ether acetate 
               
               
                 Aromatic 100 
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Methyl amyl ketone 
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Dipropylene glycol 
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 dimethyl ether 
               
               
                 Parachlorobenzotrifluoride 
                   
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Dimethyl carbonate 
                   
                   
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 t-butyl acetate 
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Xylene 
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
                   
                 21.9 
               
               
                 Gloss reducer A 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
                 12.5 
               
               
                 Amine eq. wt 
                 320 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
                 430 
               
               
                   
               
             
          
           
               
                 60° Gloss Measurement of cured coating 
               
             
          
           
               
                 Dry Film 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
                 Sample 
               
               
                 Thickness (mil) 
                 3A 
                 3B 
                 3C 
                 3D 
                 3E 
                 3F 
                 3G 
                 3H 
                 3I 
                 3J 
                 3I 
                 3m 
               
               
                   
               
               
                 10 
                 92 
                 83 
                 68 
                 80 
                 88 
                 89 
                 84 
                 71 
                 81 
                 85 
                 83 
                 79 
               
               
                   
               
             
          
         
       
     
       Example 4 
       [0038]    Example 4 shows one particular isocyanate reactive agent composition comprising secondary diamine blend, Flexisolv DBE-5, Viscosity reducer A and the Gloss reducer A fumed silica. This isocyanate reactive agent containing the gloss reducing agent was mixed with the polyisocyanate, hexamethylene diisocyanate trimer at 1.05 NCO to amine ratio and applied on a Leneta chart at 2, 10 and 25 dry film thicknesses. The process was repeated two more times and each of the Leneta chart was cured at three different conditions; Ambient (22° C., 50% relative humidity); Low temperature (5° C.) and high temperature/humidity (35° C., 80%). The results show that a low gloss polyureas coating can be achieved when applied at wide temperature/humidity conditions and at wide thickness ranges. 
         [0000]    
       
         
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
               
             
               
               
               
             
           
               
                   
                   
               
             
             
               
                   
                   
                 Sample 4A 
               
               
                   
                   
                 wt % 
               
               
                   
                   
               
               
                   
                 Secondary Diamine A 
                 32.9 
               
               
                   
                 Secondary Diamine B 
                 26.9 
               
               
                   
                 Flexisolv DBE-5 
                 8.5 
               
               
                   
                 Viscosity reducer A 
                 17.1 
               
               
                   
                 Gloss reducer A 
                 14.6 
               
               
                   
                 Amine eq. wt 
                 430 
               
               
                   
                   
               
             
          
           
               
                 60° Gloss Measurement of cured coating 
               
             
          
           
               
                   
                 Dry Film Thickness (mil) 
                 Sample 4A 
               
               
                   
                   
               
             
          
           
               
                 22° C., 50% Relative Humidity 
               
             
          
           
               
                   
                 2 
                 24 
               
               
                   
                 10 
                 31 
               
               
                   
                 25 
                 38 
               
             
          
           
               
                 5° C. 
               
             
          
           
               
                   
                 2 
                 30 
               
               
                   
                 10 
                 34 
               
               
                   
                 25 
                 39 
               
             
          
           
               
                 35° C., 80% Relative Humidity 
               
             
          
           
               
                   
                 2 
                 34 
               
               
                   
                 10 
                 38 
               
               
                   
                 25 
                 35 
               
               
                   
                   
               
             
          
         
       
     
         [0039]    The present invention is not to be limited in scope by the specific aspects or embodiments disclosed in the examples which are intended as illustrations of a few aspects of the invention and any embodiments that are functionally equivalent are within the scope of this invention. Various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art and are intended to fall within the scope of the appended claims.

Technology Classification (CPC): 2