Fiber treatment composition containing amine, polyol, amide-functional siloxanes

Abstract: The present invention refers to siloxanes having amine, polyol and amide-functionalities and to a fiber treatment composition is containing them. The composition provides good hand, resistance to yellowing and hydrophilicity to the fibers. The composition is preferably formulated as an aqueous emulsion. Applying the composition to textile fabrics produces treated fabrics having good hydrophilicity, good hand and resistance to yellowing.

Description: This invention relates to an amine, polyol, amide-functional siloxane copolymer and a method for its preparation. More particularly, this invention relates to an amine, polyol, amide-functional siloxane copolymer that is suitable for use in fiber treatment compositions. According to a further aspect the invention relates to a fiber treatment composition that provides the fiber with hydrophilicity, softness and resistance to yellowing. More particularly, this invention relates to a fiber treatment composition containing amine, polyol, amide-functional siloxanes. There is a growing need in the textile market for siloxane fabric softeners that not only provide softening but also impart hydrophilicity and other desirable properties to the treated fabric. Using a conventional siloxane polymer as the active ingredient in a fabric treatment agent often requires a trade-off in properties. Amine-functional polysiloxanes are known to improve the hand of textiles. 'Hand' means the softness and smoothness of the textile. The hand of a treated textile is directly related to the amine content (e.g., the number of amino-functional groups) of the polysiloxane. Generally, as the amine content increases, the hand of the textile improves. One method to produce amine-functional siloxane compounds for use as fabric treatment agents is to react an epoxy-functional silicone with an amine-functional organic compound. This method is described in U.S. Patent 4,409,267 which discloses a fabric treatment composition. The organopolysiloxane is prepared by a process comprising: 1) reacting a silanol-functional organopolysiloxane with a polyoxyalkylene compound and an epoxy-functional compound, by addition reaction and thereafter 2) reacting an amine compound with the epoxy group of the epoxy-functional organopolysiloxane. The reactions are typically carried out in the presence of a solvent. The solvent and any impurities formed during reaction must then be removed. This method suffers from the drawback that unsubstituted amine groups can be present, which cause yellowing when the organopolysiloxane is applied to fabrics. U.S. Patent 5,593,611 discloses a fabric treatment composition comprising an aminopolysiloxane. The aminopolysiloxane is prepared by hydrolyzing and condensing an amino-functional dialkoxysilane with water in the presence of heat and a base catalyst. The aminopolysiloxane is hydrophobic and has a molecular weight of at least 30,000. U.S. Patent 4,757,121 discloses a fiber softening composition for synthetic fibers. The composition contains a combination of 2 different amino-substituted organopolysiloxanes, an epoxy- substituted alkoxysilane and a monoepoxy compound. The first amino-substituted organopolysiloxane is terminated with a hydroxy group or alkoxy group that reacts with the epoxy-containing alkoxysilane. This forms a film of a crosslinked composition on the fiber surface. The second amino-substituted alkoxysilane is trialkyl-silyl terminated and the second organopolysiloxane is prepared by reacting an amino-containing organopolysiloxane with a liquid organic epoxy compound U.S. Patent 4,680,366 discloses a fabric finishing agent containing an organopolysiloxane with primary and secondary amine-functional hydrocarbon groups and polyoxyalkylene groups. The organopolysiloxane can be emulsified in water and applied to fabric to provide softness and anti-static properties. The organopoly-siloxane is prepared by reacting a polyoxyalkylene glycidyl ether with an amino-functional organopoly-siloxane. However, the amine-functional polyorganosiloxanes suffer from the drawback that as the amine content of the polyorganosiloxane increases, the tendency of the textile to discolor or yellow increases. Additionally, the amine-functionality tends to impart hydrophobicity to the treated textile. To minimize yellowing, it has been the practice in the textile industry to impart softness to a textile by applying a modified polysiloxane, which contains amide groups or carbamate groups instead of amine groups. However, amide and carbamate groups do not provide the same desirable level of softness characteristic of the amine groups. For example, another method for producing amine-functional siloxanes for use in fabric treatment agents is disclosed in "Structure Activity Relationships of Aminofunctional Siloxanes as Components in Softening Finishes", Textile Chemist and Colorist , by Lautenschlager et al., published March 1995, Vol. 27, No. 3. Lautenschlager et al. disclose that epoxidation is not a viable alternative to an improved softener because of impurities formed during the reaction. Alternatively, Lautenschlager et al. disclose acylated aminofunctional silicones that can be used in fabric softening finishes, and a method for their preparation by acylation of an aminofunctional silicone fluid. The acylating agent can be an anhydride, lactone or carbonate. However, the resulting acylated aminofunctional silicones exhibit a decline in hand when compared to standard aminosiloxanes Therefore, it is an object of this invention to provide an amine, polyol, amide-functional siloxane copolymer or a blend of siloxanes having amine, polyol and amide-Functional groups in fiber treatment compositions. U.S. Patent 5,100,991 discloses compounds that can be used in fabric treatment compositions. The compounds are prepared by reacting an aminofunctional silane or siloxane with a lactone. U.S. Patent 5,118,535 discloses a method for treating fibrous materials comprising applying a composition containing a cyclic diamine functional polydiorganosiloxane. The composition can be a solution, dispersion or emulsion. EP A2 0 399 706 discloses a method for treating fibrous materials. The method comprises pre-reacting an amine-containing organosiloxane with a monoepoxide, and thereafter applying the resulting product to the fibers. The product has primary, secondary and tertiary amine groups, where up to 10% of the amine groups are primary amine groups. U.S. Patent 4,311,626 discloses a composition containing an aminofunctional polydiorganosiloxane and a carboxylfunctional polydiorganosiloxane. The composition is used to treat fibers to impart smoothness, crease resistance, elongation recovery and compression recovery. However, carboxyl groups detrimentally affect the hand of the treated fibers. U.S. Patent 4,366,001 discloses a fiber treating composition that contains at least 2 of 3 types of organofunctional siloxanes. The first is an amino-functional siloxane, the second is a carboxyl-functional siloxane and the third is an epoxy-functional siloxane. At least one of the organofunctional siloxanes contains at least one polyoxyalkylene group. The composition provides antistatic character, moisture absorbability, stain resistance, pliability, smoothness and compression recovery. However, none of these references disclose a fiber treatment composition that imparts hydrophilicity and provides resistance to yellowing to textile fibers, without a detriment to hand. Therefore, it is a further object of this invention to provide a fiber treatment composition that provides all of these desired properties. It is a further object of the present invention to provide a functional siloxane copolymer that imparts the above advantageous properties to a fiber treatment composition. This invention relates to a fiber treatment composition containing siloxanes having amine-, polyol and amide-functionalities. The combination of amine, polyol and amide-functionalities provides a synergistic effect in that the fiber treatment composition provides resistance to yellowing and provides hydrophilicity to the treated fiber without significant detriment to the hand of the fiber. This invention relates to a fiber treatment composition. The composition comprises active ingredient (A), which is selected from (I) a combination comprising (a) an amine, polyol-functional siloxane, and (b) a polyol, amide-functional siloxane; and (II) an amine, polyol, amide-functional siloxane copolymer. Furthermore this invention relates to an amine, polyol, amide-functional siloxane copolymer Component (a), the amine, polyol-functional siloxane, has an average formula: wherein each E is independently selected from a monovalent hydrocarbon group, a hydroxyl group or an alkoxy group; each R 1 is independently a monovalent hydrocarbon group; each R 2 is independently a divalent hydrocarbon group having 1 to 10 carbon atoms; h is 25 to 1,000; and j is 0.1 to 200. Each R 3'' is a heterocyclic nitrogen-containing group including wherein each R 4'' is independently selected from a hydrogen atom, a monovalent hydrocarbon group or a group of formula -R 2 NY 2 , each Y is independently a hydrogen atom or Y', with the proviso that not all Y = hydrogen, and each Y' is a group of the formula Each E is an endblocking group independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups. The selection of endblocking groups depends on the method used to make component (i) the amine- functional siloxane, infra, used to prepare (A) the active ingredient of the composition. The monovalent hydrocarbon groups suitable as endblocking group E are monovalent hydrocarbon groups, preferably alkyl or aryl groups. When the endblocking group E is an alkoxy group, it preferably has 1 to 18 carbon atoms. Each R 1 is independently a monovalent hydrocarbon group. R 1 is exemplified by alkyl such as methyl, ethyl, propyl, butyl, pentyl and hexyl; aryl such as phenyl, tolyl and xylyl; and aralkyl such as benzyl and phenethyl. Alkyl groups are preferred, and methyl is particularly preferred. Each R 2 is independently a divalent hydrocarbon group of 1 to 10 carbon atoms. The divalent groups are exemplified by alkylene groups such as ethylene, propylene, butylene, isobutylene and methylpropylene; and alkylene-arylene groups expressed by the formula -(CH 2 ) 2 -C 6 H 4 . Alkylene groups such as ethylene, propylene and isobutylene groups are preferred. Preferably, R 1 is an alkyl group such as methyl, R 2 is an alkylene group such as isobutyl, h is 75 to 400, and j is 0.75 to 20. Preferably, Y' is Component (a) the amine, polyol -functional siloxane can be prepared by methods such as the method disclosed in EP AZ 0 399 706 A2, published on November 28, 1990. This method comprises reacting an amine-functional siloxane with an epoxy-functional compound. More preferably, (a) the amine, polyol-functional siloxanes used in this invention are prepared by the following method. First, component (i) an amine-functional siloxane is prepared by base equilibration using a catalyst known in the art. A preferred method comprises heating to 150°C., a composition comprising a polydiorganosiloxane; an endblocker, such as hexamethyldisiloxane; an amine-functional silane or amine-functional siloxane; and water in the presence of the catalyst. While heating, a mild strip is applied to the system to remove by-products such as water and alcohol. After formation of component (i), the reaction mixture can be stripped to remove low boiling impurities from component (i). In a particularly preferred embodiment of the invention, component (i) is formed by a condensation reaction process. The condensation reaction process comprises I) heating a mixture comprising silanol-endblocked polydimethylsiloxane, an alcohol and an aminosilane, in the presence of a catalyst, and thereafter II) gradually reducing pressure to promote condensation polymerization by removing by-products from the reaction mixture. The alcohol is preferably a blend of linear alcohols having 10 to 15 carbon atoms. Suitable alcohols are commercially available. The catalyst used in step I) may be, e.g., barium hydroxide, trisodium orthophosphate and combinations thereof. The mixture in step I) is preferably heated to 85° to 120°C. for a period of 1 to 5 hours. The by-products formed in step II) are water and alcohol. Pressure in step II) is preferably reduced to 600 mBar to 200 mBar. After the viscosity of the product of step II) is stabilized, pressure is returned to ambient and the product is cooled in an inert atmosphere. Component (i) the amine-functional siloxane has the average general formula: where R 1 , R 2 , h and j are as described above, with h preferably being from 75 to 400. R 3' is a heterocyclic nitrogen-containing group where each R 4' is selected from a hydrogen atom, a monovalent hydrocarbon or a group of the formula -R 2 NH 2 . When (i) the amine-functional siloxane is prepared by the base equilibration process, each E is a monovalent hydrocarbon group, preferably an alkyl or aryl group. When the amine-functional siloxane is prepared by the condensation reaction process, each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups. The amine-functional siloxane (i) is then reacted with (ii) an epoxy-functional compound to form (a) the amine, polyol -functional siloxane, described above. Component (ii) is an epoxy-functional compound having a general formula: where R 2 is a divalent hydrocarbon group as described above. Suitable epoxy-functional compounds for component (ii) include glycidol, 2,3-epoxy-cyclopentanol and 3,3-epoxy-6-methylcyclohexylmethanol. Glycidol is preferred. Component (b) is a polyol, amide-functional siloxane having an average general formula: wherein E, R 1 and R 2 are as described above, m is 25 to 1,000, and n is 0.1 to 200. Each R 3''' is a heterocyclic nitrogen-containing group including where each R 4"' is independently selected from a hydrogen atom or a group of formula -R 2 NZ 2 , each Z is selected from a hydrogen atom or Z', with the proviso that not all Z = hydrogen, and Z' is a group of the formula where each R 5 is a divalent hydrocarbon group of 1 to 7 carbon atoms and z is an integer from 1 to 7 inclusive. Preferably, R 1 is an alkyl group such as methyl, R 2 is an alkylene group such as isobutyl, m is 75 to 400, and n is 0.1 to 20. Preferably Z' is The polyol, amide-functional siloxane (II) is preferably produced by reacting (i) an amine-functional siloxane, as described above, with (iii) a material selected from lactones. The polyol, amide-functional siloxane is preferably produced by the method disclosed in U.S. Patent 5,100,991. The preferred method comprises reacting (i) an amine functional siloxane with (iii) a lactone. However, lactones are preferred as component (iii). Suitable lactones are disclosed in U.S. Patent 5,100,991. Suitable lactones have the formula where R 5 and z are as described above. Preferably, each R 5 represents a group with 1 carbon atom and z is 3 to 6. The lactone is exemplified by butyrolactone, epsilon caprolactone, and delta gluconolactone. Butyrolactone and epsilon caprolactone are particularly preferred. In the textile treatment composition of the present invention component a) as defined above is preferably present in an amount of 50 - 99 percent by weight, more preferred 80 - 98 percent by weight, most preferred 85 - 95 percent by weight and component b) as defined above is preferably present in an amount of 1 - 50 percent by weight, more preferred 2 - 20 and most preferred 5 - 15 percent by weight, all percentages are based on the total weight of component a) and b). In an alternative embodiment of the invention, (A) the active ingredient comprises ingredient (II), an amine, polyol, amide-functional siloxane copolymer. The copolymer has the average general formula: where each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups; each R 1 is independently a monovalent hydrocarbon group; each R 2 is independently a divalent hydrocarbon group having 1 to 10 carbon atoms: each R 3 is a heterocyclic nitrogen- containing group including or a nitrogen-containing group where each R 4 is independently selected from a hydrogen atom, a monovalent hydrocarbon or a group of formula -R 2 NX 2 , where each X is independently a hydrogen atom or X', with the proviso that not all X = hydrogen, and each X' is independently selected from groups of the formula or groups of the formula with at least one of each of the above X' alternatives being present, where each R 2 is as described above, each R 5 is independently a divalent hydrocarbon group of 1 to 7 carbon atoms, z is an integer from 1 to 7; e is 25 to 1,000; and f is 0.1 to 200. Preferably, e is 75 to 400, and f is 0.85 to 20. Preferably, the amount of X and X' represented by groups of the formula is 0.1 to 2.9 mol%, more preferred 0.9 to 2.1 mol%, of the copolymer molecule. Preferably, the amount of X and X' represented by groups of formula is 0.01 to 2.9 mol%, more preferred 0.01 to 0.05 mol%, of the copolymer molecule. Each R 1 is independently a monovalent hydrocarbon group. R 1 is exemplified by alkyl such as methyl, ethyl, propyl, butyl, pentyl and hexyl; aryl such as phenyl, tolyl and xylyl; and aralkyl such as benzyl and phenethyl. Alkyl groups are preferred and methyl is particularly preferred. Each R 2 is independently a divalent hydrocarbon group of 1 to 10 carbon atoms. The divalent groups are exemplified by alkylene groups such as ethylene, propylene, butylene, isobutylene and methylpropylene; and alkylene-arylene groups expressed by the formula -(CH 2 ) 2 -C 6 H 4 . Alkylene groups such as ethylene, propylene and isobutylene groups are preferred. Each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups. Preferably, the alkoxy groups have 10 to 15 carbon atoms. Each R 5 is independently a divalent hydrocarbon groups of 1 to 7 carbon atoms, and z is an integer from 1 to 7. R 5 is exemplified by ethylene, propylene, butylene and isobutylene. Preferably, the group represented by general formula is Preferably, the group represented by general formula is The amine, polyol, amide-functional siloxane copolymer can be prepared by reacting (i) the amine-functional siloxane described above; (ii) the epoxy-functional compound described above; and (iii) the material selected from lactones, described above. Preferably, the amount of component (i) is 90 to 99 wt%, the amount of component (ii) is 0.5 to 9 wt%, and the amount of component (iii) is 0.1 to 5 wt%. The copolymer is preferably prepared by heating components (i), (ii) and (iii) to 80 to 115°C. for several hours. The copolymer can be prepared by reacting (i) the amine-functional siloxane with (ii) the epoxy-functional compound and (iii) the material selected from lactones; where components (i), (ii), and (iii) are combined at the same time, to produce the amide and polyolfunctionalities of the siloxane copolymer in one step. Preferably, components (i), (ii), and (iii) are heated to 80 to 100°C. for several hours to prepare the copolymer by this method. Alternatively, the copolymer can be prepared by the steps of: (1) reacting (i) the amine-functional siloxane with (ii) the epoxy-functional compound; yielding a reaction product that is an amine, polyol-functional siloxane; and thereafter (2) reacting the reaction product of (i) and (ii) with (iii) the material selected from lactones; yielding an amine, polyol, amide-functional siloxane copolymer. (Also, the copolymer can be prepared by reacting the reaction product of (i) and (iii) with (ii)). When the copolymer is prepared by this method, components (i) and (ii) are preferably heated to 80 to 115°C. for several hours. The reaction product of (i) and (ii) is then reacted with component (iii) by heating at 100°C. for several hours. Preferably, the amine, polyol-functional siloxane of step (1) is prepared by reacting (i) the amine-functional siloxane with (ii) the epoxy-functional compound to form the amine, polyol-functional siloxane reaction product of step (1). This method is exemplified in European Patent Application No. 0 399 706 A2, published on November 28, 1990. The amine, polyol-functional siloxane reaction product formed in step (1) has the average general formula: where R 1 , R 2 , E, e and f are as described above, and each R 3'' is a heterocyclic nitrogen-containing group including or a nitrogen-containing group where each R 4'' is selected from a hydrogen atom or a group of formula -R 2 NY 2 , where each Y is independently a hydrogen atom or Y', each Y' is a group of the formula where each R 2 is a divalent hydrocarbon group as described above. In step (2), the amine, polyol-functional siloxane reaction product is then reacted with (iii) the material selected from lactones described above. Preferably, a lactone is reacted with the amine, polyol-functional siloxane to produce the amine, polyol, amide-functional siloxane copolymer. A preferred method for forming an amide-functional group by reaction of an amine-functional group with a lactone can be found in U.S. Patent 5,100,991. The fiber treatment composition comprises active ingredient (A), as described above. Active ingredient (A) may further comprise (III) an organic fiber treatment compound, (IV) an organosiloxane fiber treatment compound, e.g., dimethylsilicone or organofunctional silicone and combinations thereof. The fiber treatment composition may further comprise one or more optional ingredients. For example, the following optional ingredients can be added to the fiber treatment composition: (C) one or more surfactants when the fiber treatment composition is an emulsion, (D) an organic acid, (E) a thickener, (F) a crease resist resin, (G) an oil soluble colorant, (H) a water soluble colorant, and combinations thereof. Ingredient (B) is a carrier selected from water, organic solvents or low molecular weight silicones. Suitable organic solvents include hydrocarbons such as aromatic hydrocarbons exemplified by toluene, benzene and xylene; alkanes exemplified by hexane and heptane; ketones exemplified by acetone, methyl ethyl ketone and methylisobutyl ketone; and alcohols. Ingredient (B) is preferably water. Ingredient (C) is selected from cationic or nonionic surfactants. Nonionic surfactants are preferred. The amount of ingredient (C) is preferably 3 to 25 wt% of the emulsion. The emulsion can further comprise optional ingredient (D), an organic acid. Ingredient (D) is preferably glacial acetic acid. The amount of ingredient (D) in the emulsion preferably ranges from greater than 0 to 2 wt% of the emulsion. The fiber treatment composition can have any suitable form. For example, the composition can be applied to the fibers neat. However, the fiber treatment composition can be a solution, dispersion or emulsion. Preferably, the fiber treatment composition is an emulsion comprising: i) a discontinuous phase comprising active ingredient (A), ii) a continuous phase comprising ingredient (B), and iii) ingredient (C), a surfactant. Ingredient (D), an organic acid, is preferably added to the emulsion. The amount of active ingredient (A) in the emulsion is preferably 5 to 50 wt%. More preferably, the active ingredient (A) is 10 to 20 wt% of the emulsion. A method for the preparation of an emulsion of an organopoly-siloxane is disclosed in U.S. Patent 5,258,451. This invention further relates to a method for preparing a fiber treatment composition. The method comprises combining active ingredient (A) with ingredient (B) and any other optional ingredients. Preferably, active ingredient (A) and ingredient (B) are combined by a process selected from dissolving, dispersing or emulsifying. When active ingredient (A) contains more than 1 component, the fiber treatment composition can be prepared by independently combining each component separately with optional ingredients to form a plurality of treatment agents. The plurality of treatment agents can then be combined before application to the fibers, or they can be applied to the fibers simultaneously or sequentially. For example, when a combination of components (a) and (b) is used as the active ingredient (A), the fiber treatment composition can be prepared by forming (1) a first treatment agent comprising component (a) and ingredient (B) and (2) a second treatment agent comprising component (b) and ingredient (B). Preferably, (1) the first treatment agent and (2) the second treatment agent are both emulsions, ingredient (B) is water, and (1) the first treatment agent further comprises a first surfactant and (2) the second treatment agent further comprises a second surfactant. Treatment agents (1) and (2) can then be mixed together and thereafter applied to the fibers. Alternatively, treatment agent (1) can be applied to the fibers, and thereafter treatment agent (2) can be applied to the fibers. Alternatively, treatment agent (2) can be applied to the fibers, and thereafter treatment agent (1) can be applied to the fibers. This invention further relates to a method for treating fibers. The method comprises applying the fiber treatment composition to the fibers and thereafter removing the carrier, if any. The fiber treatment composition can be applied to the fibers by any convenient method. For example, the composition can be applied by padding, dipping or spraying. When the fiber treatment composition comprises more than 1 solution, dispersion or emulsion, the solutions, dispersions and emulsions can be applied simultaneously or sequentially to the fibers. The fiber treatment composition can be applied to the fibers during making the fibers, during making a fabric from the fibers or later, such as during laundering the fabric. After application, the carrier can be removed from the fiber treatment composition by, for example, drying at ambient or elevated temperature. The amount of fiber treatment composition applied to the fibers is preferably sufficient to provide 0.1 to 15 wt% of the active ingredient on the fibers, based on the dry weight of the fibers. More preferably, the amount of active ingredient on the fibers is 0.2 to 1 wt% based on the dry weight of the fibers. The fibers that can be treated with the composition described above are not specifically restricted. Suitable fibers include natural fibers such as cotton, silk, linen and wool; regenerated fibers such as rayon and acetate; synthetic fibers such as polyesters, polyamides, polyacrylonitriles, polyethylenes, polypropylenes; and combinations and blends thereof. The form of the fibers is not specifically restricted. The fiber treatment composition is suitable for use on threads, filaments, tows, yarns, woven fabrics, knitted materials, nonwoven materials, and others. The fiber treatment composition of this invention has the following advantages: 1. the composition imparts hydrophilicity to the fibers. 2. the composition provides yellowing resistance to the fibers, and 3. the composition provides an improvement to hand without significant detriment to hydrophilicity and yellowing resistance. 'Hand' means the softness and smoothness of the fabric. The amine-functional groups provide superior hand to the fabric. The polyol and amide functionalities provide hydrophilicity and resistance to yellowing. Reference Example 1 Emulsion samples were prepared by the following method. 1. The active ingredient was combined with 2 surfactants and a first charge of acid, and this mixture was stirred for 15 minutes. The surfactants used were GENAPOL® UD 050 and GENAPOL® UD 110. GENAPOL® UD 050 and GENAPOL® UD 110 are ethoxylated C11 branched and linear alcohols having CAS No. 127036242, available from Hoechst Celanese. The acid was glacial acetic acid. 2. A first water charge was added to the mixture from step 1, and the resulting mixture was stirred for 30 minutes. 3. A second water charge was added to the mixture from step 2 and the resulting mixture was stirred for 30 minutes. 4. A third water charge was added to the mixture from step 3 and the resulting mixture was stirred for 30 minutes. 5. A second acid charge and a fourth water charge were added to the mixture from step 4. The resulting mixture was stirred for 1 hour. The formulation of the emulsion samples is in Table 1. The emulsion samples were formulated to provide 1 wt% of the active ingredient on the fiber to which the emulsion was applied. Emulsion Formulation Ingredient Amount (Weight % based on total weight of the emulsion) Active Ingredient 20 GENAPOL® DU 050 3 GENAPOL® DU 110 7 1 ST Acid Charge 0.1 1 ST Water Charge 4 2 ND Water Charge 4 3 RD Water Charge 41.9 4 TH Water Charge 19.8 2 ND Acid Charge 0.2 Reference Example 2 - Evaluation of Emulsion Samples Each emulsion sample was then applied to 100% cotton interlock knit fabric (TESTFABRICS®style #460). The treated fabric was dried and cured at 150°C for 3 minutes. The treated fabric was then conditioned at room temperature overnight. The whiteness index, hand and absorbency were then measured on each sample. Whiteness index is a dimensionless number computed from colorimetric data. Whiteness index was determined by averaging the results of 3 readings per sample with a HUNTERLAB® colorimeter, as described in ASTM E 313-96. Hand is a relative measurement provided by a panel of experienced evaluators. Hand of each sample is ranked on a scale of 1 to X, X being the number of samples evaluated relative to each other. A rating of 1 indicates the best hand, i.e. softest and smoothest feel, and higher numbers indicate decreasing hand. Absorbency is measured by AATCC (American Association of Textile Chemist and Colorist) Test Method 79-1995-Absorbance of Bleached Textiles. This method is: A drop of water is allowed to fall from a fixed height onto the taut surface of a fabric test specimen. The time required for the specular reflection of the water drop to disappear is measured and recorded as wetting time. Absorbency was measured after conditioning at room temperature overnight. In some examples, absorbency was measured again 1 week later, and again 1 month later. Example 1 Hydroxy-terminated dimethylsiloxane having a viscosity of 70 cSt (0.00007 m 2 /s) at 25°C. (216.07g), aminoethylaminoisobutylmethyldimethoxysilane (14.08g), polydimethylsiloxane fluid having a viscosity of 15 cSt (0.000015 m 2 /s) at 25°C. (21.79g), deionized water (5.0g), and hydroxy-terminated dimethylsiloxane with tetrabutyl -phosphonium chloride (2.5g), were combined in a 500 mL flask equipped with a condenser and a Dean Stark trap. This combination was heated at 115°C. for 4 hours, and then heated to 150°C. for 1 hour. The resulting polymer was stripped by heating at 150°C. under full vacuum, and thereafter the stripped polymer was cooled to 80°C. Glycidol (9.48g) was added to the stripped polymer. The glycidol and polymer were heated to 115°C. for 4 hours. The resulting polymer was cooled to 100°C. Butyrolactone (0.92g) was added to the polymer. The polymer and butyrolactone were heated at 100°C. for 4 hours, thereby forming Copolymer (1) as shown as active ingredient for sample 1. Example 2 Hydroxy-terminated dimethylsiloxane having a viscosity of 70 cSt (0.00007 m 2 /s) at 25°C. (216.07g). aminoethylaminoisobutylmethyldimethoxysilane (14.08g), polydimethylsiloxane fluid having a viscosity of 15 cSt (0.000015 m 2 /s) at 25°C. (21.79g), deionized water (5.0g), and hydroxy-terminated with tetrabutylphosphonium chloride dimethylsiloxane (2.5g), were combined in a 500 mL flask equipped with a condenser, and a Dean Stark trap. This combination was heated at 115°C. for 4 hours, and then heated to 150°C. for 1 hour. The resulting polymer was stripped by heating at 150°C. under full vacuum, and the stripped polymer was cooled to 80°C. Glycidol (9.48g) and butyrolactone (0.92g) were added to the stripped polymer. The glycidol, butyrolactone and polymer were heated to 100°C. for 4 hours thereby forming Copolymer (2) as shown as active ingredient for sample 2. Example 3 The evaluated samples were emulsions prepared by the method of Reference Example 1. Sample 1 contained as active ingredient Copolymer (1), shown in Table 2. Sample 2 contained as active ingredient Copolymer (2), shown in Table 2. Sample 3 contained as active ingredient a blend of 99wt% of an amine, polyol-functional siloxane, shown as active ingredient for sample C1 in Table 2 and 1wt% of a polyol, amide-functional siloxane, shown as active ingredient for sample C2 in Table 2. The samples was applied to a fabric, and whiteness index, hand and absorbency were measured as in Reference Example 2. The results are in Table 3. Comparative Example 1 Sample C1 was prepared by the method in Reference Example 1. The active ingredient was an amine, polyol-functional siloxane that was prepared by reaction of dimethylmethyl(aminoethylaminoisobutyl)siloxane with glycidol. The active ingredient is shown in Table 2. The emulsion was applied to a fabric, and whiteness index, hand and absorbency were measured as in Reference Example 2. The results are in Table 3. Comparative Example 2 Sample C2 was prepared by the method of Reference Example 1. The active ingredient comprised a polyol, amide-functional siloxane. The active ingredient is shown in Table 2. The emulsion was applied to a fabric, and whiteness index, hand and absorbency were measured as in Reference Example 2. The results are in Table 3. Comparative Example 3 Sample C3, a sample of untreated 100% cotton knit fabric, was evaluated for absorbency, whiteness index and hand, according to the methods in Reference Example 2. The results are in Table 3. Water Absorbency, Whiteness Index, and Hand of Each Sample Sample No. Whiteness Index Hand Absorbency (seconds) 1 67.29 3 3.6 2 66.39 2 4.0 3 69.78 1 2.6 C1 70.30 4 1.0 C2 71.21 5 < 1 C3 72.55 6 Immediate Sample 3 shows that when the active ingredient is a combination of an amine, polyol-functional siloxane and a polyol, amide-functional siloxane, good whiteness index, hand and absorbency can be obtained. Sample 3 provided better hand than any other samples. Sample 3 also provided better whiteness index, hand and absorbency than the samples with copolymers as the active ingredient. Sample 1 shows that compositions with copolymer 1 as the active ingredient provided comparable hand and absorbency to compositions with copolymer 2 as the active ingredient. Sample 2 shows that copolymer 2 provided better hand than either an amine, polyol-functional siloxane alone or a polyol, amide-functional siloxane alone. Comparative Example 1 shows that an amine, polyol-functional siloxane active ingredient provides poorer hand than the copolymers in samples 1 and 2 and the blend in sample 3. Comparative Example 2 shows that a polyol, amide-functional siloxane provides poorer hand than the copolymers in samples 1 and 2 and the blend in sample 3. Comparative Example 3 shows that hand is poorest with untreated cotton fabric.

Claims: A fiber treatment composition comprising (A) an active ingredient selected from: (I) a combination comprising (a) an amine, polyol-functional siloxane having an average general formula wherein each E is independently selected from a monovalent hydrocarbon group, a hydroxyl group or an alkoxy group; each R 1 is independently a monovalent hydrocarbon group; each R 2 is independently a divalent hydrocarbon group having 1 to 10 carbon atoms; h is 25 to 1,000; j is 0.1 to 200; and each R 3" is a heterocyclic nitrogen-containing group including wherein each R 4'' is independently selected from a hydrogen atom, a monovalent hydrocarbon group or a group of formula -R 2 NY 2 , each Y is independently a hydrogen atom or Y', with the proviso that not all Y = hydrogen, and each Y' is a group of the formula and (b) a polyol, amide-functional siloxane having an average general formula wherein E, R 1 and R 2 are as described above, m is 25 to 1,000, n is 0.1 to 100; and each R 3''' is a heterocyclic nitrogen-containing group including wherein each R 4''' is independently selected from a hydrogen atom or a group of formula -R 2 NZ 2 , each Z is selected from a hydrogen atom or Z', with the proviso that not all Z = hydrogen, and Z' is a group having a formula wherein each R 5 is a divalent hydrocarbon group of 1 to 7 carbon atoms, and z is an integer from 1 to 7 inclusive: or (II) an amine, polyol, amide-functional siloxane copolymer, wherein the copolymer has the average general formula: where each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups; each R 1 is independently a monovalent hydrocarbon group; each R 2 is independently a divalent hydrocarbon group having 1 to 10 carbon atoms; each R 3 is a heterocyclic nitrogen-containing group including or a nitrogen-containing group where each R 4 is independently selected from a hydrogen atom, a monovalent hydrocarbon or a group of the formula -R 2 NX 2 , where each X is independently a hydrogen atom or X', with the proviso that not all X = hydrogen, each X' is independently selected from groups of the formula or groups of the formula with at least one of each of the above X' alternatives being present, where each R 2 is as described above, each R 5 is independently a divalent hydrocarbon group of 1 to 7 carbon atoms, z is an integer from 1 to 7; e is 25 to 1,000; and f is 0.1 to 200; and (B) a carrier. The composition of claim 1 wherein the carrier is selected from water or organic solvents. The composition of claim 2 wherein the composition is selected from a dispersion or an emulsion. The composition of claim 3 wherein the composition is an emulsion, ingredient (B) is water, and the composition further comprises ingredient (C), a surfactant. The composition of claim 4 further comprising greater than 0 to 2 wt%, based on the weight of the emulsion, of ingredient (D), an organic acid. The composition of claim 1 wherein the active ingredient (A) further comprises an optional active ingredient selected from (III) an organic fiber treatment compound, (IV) an organosiloxane fiber treatment compound or combinations thereof. An amine, polyol, amide-functional siloxane copolymer, wherein the copolymer has the average general formula: where each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups; each R 1 is independently a monovalent hydrocarbon group; each R 2 is independently a divalent hydrocarbon group having 1 to 10 carbon atoms; each R 3 is a heterocyclic nitrogen-containing group including or a nitrogen-containing group where each R 4 is independently selected from a hydrogen atom, a monovalent hydrocarbon or a group of the formula -R 2 NX 2 , where each X is independently a hydrogen atom or X', with the proviso that not all X = hydrogen, each X' is independently selected from groups of the formula or groups of the formula with at least one or eacn or the above X' alternatives being present, where each R 2 is as described above, each R 5 is independently a divalent hydrocarbon group of 1 to 7 carbon atoms, z is an integer from 1 to 7; e is 25 to 1,000; and f is 0.1 to 200. The copolymer of claim 7 wherein the copolymer contains 0.1 to 2.9 mol% of X and X' groups of the formula The copolymer of claim 7 wherein the copolymer contains 0.01 to 2.9 mol% of X and X' groups of the formula The copolymer of claim 7 wherein R 1 is an alkyl group; R 2 is an alkylene group; each X' is independently selected from or each X is selected from hydrogen and X'; e is 75 to 400, and f is 0.75 to 20. A method for preparing an amine, polyol, amide-functional siloxane copolymer, wherein the method comprises reacting: (i) an amine-functional siloxane of the average general formula where R 1 is a monovalent hydrocarbon group, R 2 is a divalent hydrocarbon group having 1 to 10 carbon atoms, each E is independently selected from monovalent hydrocarbon groups, hydroxyl groups or alkoxy groups, e is 25 to 1,000, and f is 0.1 to 200; R 3' is a heterocyclic nitrogen-containing group including or a nitrogen-containing group where each R 4' is independently selected from a hydrogen atom, a monovalent hydrocarbon or a group of the formula -R 2 NH 2 ; and (ii) an epoxy-functional compound of formula where R 2 is a divalent hydrocarbon group as described above; and (iii) a material selected from lactones. The method of claim 11 wherein component (i) is prepared by a base equilibration process comprising: 1) heating a composition comprising a polydiorganosiloxane, hexamethyldisiloxane, an amine compound selected from amine-functional silane or an amine-functional siloxane, and water in the presence of a catalyst; and 2) applying a mild strip to the product of step 1) thereby removing by-products including water and alcohol. The method of claim 11 wherein component (i) is prepared by a condensation reaction process comprising: I) heating a mixture comprising a silanol-endblocked polydimethylsiloxane, an alcohol and an aminosilane in the presence of a catalyst, and thereafter II) gradually reducing pressure to promote condensation polymerization by removing by-products from the reaction mixture. The method of claim 11 wherein 1) the amine-functional siloxane (i) is reacted with the epoxy-functional compound (ii) thereby yielding an amine, polyol-functional siloxane; and thereafter 2) the amine, polyol-functional siloxane is reacted with (iii) the material selected from lactones, anhydrides or carbonates. The method of claim 11 wherein (i) the amine-functional siloxane, (ii) the epoxy- functional compound, and (iii) the material selected from lactones are combined and reacted in one step. The method of claim 11 wherein 1) the amine-functional siloxane (i) is reacted with the material selected from lactones (iii) thereby yielding an amine, polyol-functional siloxane; and thereafter 2) the amine, polyol-functional siloxane is reacted with (ii) the epoxy-functional compound. A method for forming a fiber treatment composition, wherein the method is selected from dissolving, dispersing or emulsifying: (I) a combination comprising (a) an amine, polyol-functional siloxane as defined in claim 1 and (b) a polyol, amide-functional siloxane as defined in claim 1 or (II) an amine, polyol, amide-functional siloxane copolymer as defined in claim 1; and (B) a carrier ; with the provisos that when the composition is prepared by emulsification, ingredient (B) is water, and ingredient (C) a surfactant is added to the composition. The method of claim 17 wherein active ingredient (A) is a combination of components (a) and (b); the composition comprises a combination of (1) a first treatment agent and (2) a second treatment agent, wherein (1) the first treatment agent is prepared by a method selected from dissolving, dispersing or emulsifying component (a) and ingredient (B), and (2) the second treatment agent is prepared by a method selected from dissolving, dispersing or emulsifying component (b) and ingredient (B). A method for treating fibers comprising: 1) applying to a fiber, a fiber treatment composition according to any of claims 1-6. and thereafter 2) removing the carrier. The method of claim 19 wherein the fiber treatment composition is applied to a fiber in an amount sufficient to provide 0.1 to 15 wt% of the active ingredient (A) on the fiber. A treated fiber obtainable by the method of any of claims 19 and 20.

Inventors: EVANS MARTIN JOHN, GRIFFIN HOWARD EDWIN, KENNAN LINDA DENISE, SKINNER MICHAEL WARD, ZIMMERMANN KENNETH EDWARD, EVANS, MARTIN JOHN, GRIFFIN, HOWARD EDWIN, KENNAN, LINDA DENISE, SKINNER, MICHAEL WARD, ZIMMERMANN, KENNETH EDWARD
Applicants: DOW CORNING, DOW CORNING LTD, DOW CORNING CORPORATION, DOW CORNING LIMITED
Application year: 2000
Main classification: D06M15
IPC codes: C08L83