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Patent US4696957 - Multi-component coating compositions - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsThis invention relates to aqueous "multi-pack" coating compositions, that is, those which comprise at least two discrete components (or "packs") which are mixed prior to application. Prior attempts to provide an aqueous multi-pack composition have failed to provide a suitable combination of the desirable...http://www.google.com/patents/US4696957?utm_source=gb-gplus-sharePatent US4696957 - Multi-component coating compositionsAdvanced Patent SearchPublication numberUS4696957 APublication typeGrantApplication numberUS 06/753,067Publication dateSep 29, 1987Filing dateJul 9, 1985Priority dateAug 27, 1984Fee statusLapsedAlso published asCA1273735A1, DE3585903D1, US4791152Publication number06753067, 753067, US 4696957 A, US 4696957A, US-A-4696957, US4696957 A, US4696957AInventorsHilary E. Adeney, Derrard M. HallOriginal AssigneeDulux Australia Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (9), Referenced by (4), Classifications (12), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetMulti-component coating compositionsUS 4696957 AAbstract This invention relates to aqueous "multi-pack" coating compositions, that is, those which comprise at least two discrete components (or "packs") which are mixed prior to application.
The compositions of the present invention which provide such a combination consist of a number of components which together comprise a constituent having epoxide groups, a constituent comprising addition polymer in the form of an aqueous dispersion and a constituent capable of reacting with epoxide groups. In an especially preferred embodiment, the aqueous addition polymer dispersion is combined with at least one of the other constituents in the form of a multi-polymer particle dispersion.
The composition are useful in the automotive refinish and heavy duty coatings areas.
We claim: 1. An aqueous coating composition comprising at least two discrete film-forming components which are mixed prior to application of the composition to a substrate and which react to form a continuous, cross-linked coating film, the components together including(a) a constituent which comprises epoxide groups; (b) a constituent which comprises addition polymer; and (c) a constituent which comprises reactive groups which are capable of reaction with epoxide groups, characterised in that (d) the constituent (a) comprises on average at least one epoxide group per molecule and has a number average molecular weight of from 200-10,000; (e) the addition polymer of constituent (b) comprises from 5-80% by weight of the film-forming solids and is in the form of an aqueous dispersion and further characterised in that the particles of the dispersion of addition polymer additionally comprise at least one of the other constituents and; (f) there is present in the composition from 0.2-1.5 equivalents of reactive groups per equivalent of epoxide groups. 2. An aqueous coating composition according to claim 1, characterised in that the particles of addition polymer comprise at least one polymer other than the addition polymer.
3. An aqueous coating composition according to claim 1, characterised in that the constituent which comprises epoxide groups comprises on average about two epoxide groups per molecule.
4. An aqueous coating composition according to claim 1, characterised in that the constituent which comprises epoxide groups has a number average molcular weight of from 350-1200.
5. An aqueous coating composition according to claim 1, characterised in that there are from 0.5-0.9 equivalents of reactive group per equivalent of epoxide group.
6. An aqueous coating composition according to claim 1, characterised in that the addition polymer comprises from 20%-60% by weight of the film-forming solids.
DISCLOSURE This invention relates to coating compositions and more particularly to water-based multi-component coating compositions.
(c) a constituent capable of reaction with epoxide groups.
This limitation does not affect a preferred form of the invention wherein the individual particles of the dispersion constituent are blends of addition polymer and one of the other constituents. Such dispersions can readily be prepared by the techniques used in the preparation of multi-polymer particles. By "multi-polymer particles" we mean particles which comprise a blend of at least two polymers, at least one of which polymers (the "in situ polymer") is formed in the presence of at least one other polymer (the "pre-formed polymer"). Such particles and their preparation are described in, for example, British Pat. Nos. 1,417,713, 1,421,113 and 1,515,723, European Patent Application No. 0 010 424, U.S. Pat. Nos. 3,620,989, 4,373,054 and 4,413,073 and PCT Application No. W084/00169.
As stated in the preceding paragraph, either or both of the constituents (a) and (b) may be incorporated into an aqueous dispersion of multi-polymer particles, but it is generally the epoxide constituent which is used as the pre-formed polymer. This is done for a number of reasons, including the fact that the epoxide constituent generally is not as water-soluble or -dispersible as the reactive constituent. The multi-polymer particle approach can result in a unique blend of properties which combines the best features of the epoxide constituent and the addition polymer.
The range of monomers suitable for preparation of the addition polymer for use in the dispersion constituent of this invention is large and depends on the desired final properties of the polymer. Examples of suitable ethylenically unsaturated monomers include styrene, the mixed isomers of methyl styrene known as "vinyl toluene", α-methyl styrene, the C1 -C18 alkyl acrylates and methacrylates and vinyl acetate. A small proportion of monomer having more than one ethylenically unsaturated double bond, e.g. divinyl benzene, can also be used, but an excessive degree of crosslinking should be avoided. It is also permissible to include a proportion of a monomer having a functional group. Such groups can enhance properties, for example, they can enhance adhesion to substrates or participate in the cross-linking reaction during film-formation. Examples of such monomers are glycidyl methacrylate and the lower (C1 -C4)hydroxyalkyl acrylates and methacrylates.
The compositions according to our invention may contain the normal known ingredients known to the art, such as pigments, extenders, suspending agents, coalescing agents, catalysts, thickeners and antifoams, in art-recognised quantities. The compositions are mixed prior to use and applied by any convenient means such as by brushing or spraying. They have the advantage over other water-borne systems that, while the chemical reaction between the two components and thus the ultimate film properties take some time to develop, the coating may be handled and processed long before this time. The compositions are thus useful, for example, as primer surfacers in the vehicle refinish industry or as heavy duty wall or floor finishes. In such application, they can have application and film properties equal to those of conventional solvent-based coatings combined with the economic and toxicological advantages of being water-based.
EXAMPLE 1 Preparation and comparative testing of a coating composition according to the invention wherein the epoxide constituent and the dispersion constituent each form part of a dispersion of multi-polymer particles. The composition was a two component system (or "two-pack" system to use the terminology of the paint industry) and these components shall hereinafter be referred to as "Pack A" and "Pack B". The ratio of reactive groups to epoxide groups in the total composition was 0.52:1
______________________________________barytes         21.0         partstitanium dioxide           15.5         partschina clay      22.8         partscopper chromite 1.7          partspolyamide1 34.0         partsdeionised water 5.0          parts______________________________________ 1 a 20% solution of "Casamid" (trade mark) 362, ex Thomas Swan U.K.
Pack A was prepared by loading the abovementioned ingredients to a ball mill and grinding for 16 hours to give a dispersion whose maximum particle size was less than 10 um.
______________________________________(a)    epoxy resin2 23.93     parts  methyl methacrylate                    17.72     parts  butyl acrylate    5.28      parts  allyl acetoacetate                    1.00      parts  stabiliser3  1.92      parts(b)    t-butyl perbenzoate                    0.64      parts(c)    deionised water   4.83      parts(d)    deionised water   38.70     parts(e)    deionised water   4.70      parts  sodium erythorbate                    0.28      parts  0.1% ferrous sulphate solution                    1.00      parts______________________________________ 2 "Dow" DER337 (ex Dow Chemicals) 3 "Teric" N40 (ex ICI Australia Ltd.)
The stabiliser was dissolved in the epoxy resin and monomers by mixing the materials (a) and warming to 60� C. (b) was added and the mixture (a)+(b) was emulsified into (c) by high speed mixing with a Cowles blade at 2000 rpm. This gave an emulsion with an average particle size of less than 1 um and maximum size 2 um. This emulsion was then diluted with (d) and polymerisation was initiated by the addition with stirring of (e). Stirring was then stopped and the polymerisation allowed to proceed to completion.
(a) Gravelometer test
A panel was hung vertically in a gravelometer and bombarded with 400 g. of fresh gravel blown at the panel by an air blast at a pressure of 551.6 kPa (80 p.s.i.). The panel was then assessed on a scale of from 1 (complete removal of the paint film) to 10 (no visible damage).
This was carried out according to Ford Motor Co. Test Method BI 6-1, Part A, one of a series of test methods well known to the art. A panel was cross-scribed, adhesive tape was applied to the scribes and pulled away and the adhesion estimated from the amount of paint film remaining at the cross scribes.
(c) Humidity test
This test was carried out according to Ford Test Method BI 4-2 except that the temperature was lowered to 38� C. The panels were exposed to a high humidity atmosphere in a Cleveland humidity cabinet for 240 hours and the degree of blistering assessed by eye.
(d) Hardness test
This was carried out using a "Leitz" miniload hardness tester with a load of 25 g. The diamond was allowed to remain in contact with the film for 35 sec. and then removed. The length of the resulting indentation was then measured and this was converted into a knoop value.
______________________________________     commercial  composition according     isocyanate primer                 to the invention     alone  topcoated                     alone     topcoated______________________________________(a) Gravelometer           9        9-10   8       9-10(b) Adhesion    excellent                    excellent                           excellent                                   excellent(c) Humidity    good     good   good    good    performance(d) Hardness    10       14     7       14    (knoops)______________________________________
EXAMPLE 2 Preparation of a coating composition according to the invention in which the dispersion constituent is a commercially-available copolymer. The composition was a two component system and these components shall hereinafter be referred to as "Pack "A" and "Pack B". The ratio of reactive groups to epoxide groups in the total composition was 0.52:1.
Preparation of Pack B ______________________________________(a)     epoxy resin1                 15.9        parts   stabiliser2                 0.8         parts(b)     deionised water                 3.2         parts(c)     deionised water                 13.5        parts(d)     vinyl acetate/acrylic                 30.0        parts   copolymer latex3______________________________________ 1 "Dow" (trade mark) DER337 (ex Dow Chemicals), an epoxy resin of epoxide equivalent weight 230-250. 2 "Teric" (trade mark) N40 (ex ICI Australia), a nonyl phenol ethoxylate surfactant. 3 "Acropol" (trade mark) S565 (ex A. C. Hatrick)
The ingredients (a) were warmed to 60� C. with stirring and held there until the stabiliser had melted and dissolved in the epoxy resin. (a) was then added to (b) under high speed mixing at 2000 r.p.m. with a Cowles blade. The resulting emulsion was diluted with (c) to give an emulsion of average particle size of about 1 um. The mixture was allowed to cool and then added to (d) with slow stirring.
Pack A ______________________________________(a)    barytes (high grade 40 um)                    23.43     parts  copper chromite   1.99      parts  polyamide1   3.92      parts  deionised water   14.55     parts  flash rust inhibitor solution2                    0.40      parts  antifoam3    0.10      parts(b)    deionised water   7.00      parts  antifoam3    0.50      parts(c)    deionised water   5.26      parts(d)    titanium dioxide  17.18     parts  china clay (1 um) 25.24     parts(e)    thickener solution4                    0.43      parts______________________________________ 1 "Versamid" (trade mark) 125 (ex A. C. Hatrick) 2 an aqueous solution of 9.3% sodium nitrite and 18.5% sodium benzoate. 3 "Foamaster" (trade mark) NXZ (ex Diamond Shamrock) 4 a 50% solution of a 9:1 mixture of "Collacral" (trade mark) PU85 and "Collacral" VL in a 60:40 mixture of propylene glycol and water
Materials (a) were ball-milled for 18 hours to give a dispersion of maximum size 10 um. Materials (b) were then added to the mill and milling continued for a further 15 minutes. The mill was then emptied and washed with material (c) and the washings added to (a)+(b). Materials (c) were added to half of (a)+(b)+(c) and this mixture subjected to high speed dispersion until a dispersion of maximum size 10 um was obtained (this took about 30 minutes). The second half of (a)+(b)+(c) was then added and the mixture stirred for 5 minutes. Finally, material (e) was added with stirring.
Pack B ______________________________________(a)    methyl methacrylate                    4.84      parts  butyl methacrylate                    14.73     parts  hydroxypropyl methacrylate                    4.89      parts  epoxy resin1 2.45      parts  stabiliser2  2.45      parts(b)    epoxy resin       22.03     parts(c)    coalescing agent3                    4.63      parts  t-butyl perbenzoate                    0.65      parts(d)    deionised water   4.63      parts(e)    deionised water   33.56     parts(f)    deionised water   2.73      parts  sodium erythorbate                    0.30      parts  0.1% ferrous sulphate soln.                    0.95      parts(g)    thickener solution4                    1.16      parts______________________________________ 1 "Epikote" (trade mark) 828 (ex Shell Chemical Co.) 2 "Teric" (trade mark) N40 (ex I.C.I. Australia Ltd.) 3 "Texanol" (trade mark) (ex Eastman Chemical Co.) 4 as material (e) in Pack A
Pack A ______________________________________polyamide1    15.99      partscopper chromite    2.12       partsbarytes (high grade 40 um)              24.97      partschina clay (1 um)  26.91      partstitanium dioxide   18.31      partsdeionised water    11.70      parts______________________________________ 1 20% solution of "Casamid" (trade mark) 362 (ex Thomas Swan)
The materials were loaded to a ball mill and milled for 16 hrs to give a dispersion of maximum particle size 10 um.
Pack B ______________________________________(a)    epoxy resin1 21.97     parts  methyl methacrylate                    8.67      parts  butyl acrylate    12.45     parts  allyl acetoacetate                    0.89      parts  stabiliser2  1.77      parts(b)    t-butyl perbenzoate                    0.66      parts(c)    deionised water   4.45      parts(d)    deionised water   35.28     parts(e)    deionised water   4.59      parts  sodium erythorbate                    0.26      parts  0.10% ferrous sulphate soln.                    0.92      parts(f)    coalescing agent3                    8.09      parts______________________________________ 1 DER661 (ex Dow Chemicals) 2 "Teric" (trade mark) N40 (ex ICI Australia Ltd.) 3 "Texanol" (trade mark) (ex Eastman Chemical Co.)
Pack A ______________________________________(a)    titanium dioxide 21.4       parts  barytes (high grade 40 um)                   21.4       parts  copper chromite  1.0        parts  deionised water  14.9       parts  polyamide1  18.5       parts(b)    deionised water  6.7        parts(c)    polyamide        16.1       parts______________________________________ 1 a 20% aqueous dispersion of "Wolfamid" (trade mark) 3 (ex Victor Wolf).
The materials (a) were ground in a ball mill for 16 hours to give a dispersion whose maximum particle size was under 10 um. The mill was drained and washed out with material (b), the washings being added to (a). Material (c) was then added to (a)+(b) and stirred at high speed for 15 minutes.
Pack B ______________________________________(a)    epoxy resin1 33.33     parts  methyl methacrylate                    6.79      parts  butyl methacrylate                    2.71      parts  hydroxypropyl methacrylate                    4.79      parts  stabiliser2  2.40      parts(b)    t-butyl perbenzoate                    0.38      parts(c)    deionised water   5.65      parts(d)    deionised water   38.07     parts(e)    sodium erythorbate                    0.17      parts  0.1% ferrous sulphate soln.                    1.0       parts  deionised water   4.71      parts______________________________________ 1 DER337 (ex Dow Chemicals) 2 "Teric" N40 (ex I.C.I. Australia Ltd.)
Pack A ______________________________________barytes (high grade 40 um)              21.43      partstitanium dioxide   15.82      partschina clay (1 um)  23.27      partscopper chromite    1.74       partspolyamide1    17.86      partsdeionised water    19.88      parts 1 20% aqueous solution of "Casamid" (trade mark) 362 ex Thomas Swan.
The materials were loaded to a ball mill and ground for 16 hours to give a dispersion whose maximum particle size is 10 um.
Pack B ______________________________________(a)     epoxy resin1                  12.38      parts   stabiliser2                  0.62       parts(b)     deionised water                  2.49       parts(c)     deionised water                  10.51      parts(d)     vinyl acetate/acrylic                  74.00      parts   copolymer latex3______________________________________ 1 DER 337 (ex Dow Chemicals) 2 "Teric" N40 (ex ICI Australia Ltd.) 3 "Acropol" S5-65 (ex A. C. Hatrick)
Pack A ______________________________________barytes (high grade 40 um)              19.85      partscopper chromite    1.71       partstitanium dioxide   14.56      partschina clay (1 um)  21.42      partsamine1        5.28       partsdeionised water    37.18      parts______________________________________ 1 A 50% solution of D.E.H.52 (diethylene triamine modified with liquid epoxy resin) (ex Dow Chemicals)
The materials were loaded to a ball mill and ground for 16 hours to give a dispersion whose maximum particle size was 10 um.
Pack B ______________________________________(a)    epoxy resin1                   23.80      parts  butyl acrylate   22.84      parts  allyl acetoacetate                   0.96       parts  stabiliser2 1.92       parts(b)    t-butyl perbenzoate                   0.64       parts(c)    deionised water  4.80       parts(d)    deionised water  35.76      parts(e)    deionised water  8.00       parts  sodium erythorbate                   0.28       parts  0.1% ferrous sulphate soln.                   1.00       parts______________________________________ 1 "Epikote" 1004 (ex Shell Chemical Co.) 2 "Teric" N40 (ex ICI Australia Ltd.)
Pack A ______________________________________barytes (high grade 40 um)              21.85      partstitanium dioxide   16.03      partschina clay (1 um)  23.56      partscopper chormite    1.85       partspolyamide1    27.18      partsdeionised water    8.76       partscatalyst2     0.77       parts______________________________________ 1 20% solution of "Casamid" 362 (ex Thomas Swan) 2 DMP 30 (2,4,6tri(dimethylamino)phenol) (ex Rohm and Haas Co.)
Pack B ______________________________________(a)    epoxy resin1 15.18     parts  epoxy resin2 6.48      parts  methyl methacrylate                    15.40     parts  butyl acrylate    1.97      parts  hydroxypropyl methacrylate                    4.33      parts  stabiliser3  2.18      parts(b)    t-butyl perbenzoate                    0.58      parts(c)    deionised water   4.41      parts(d)    deionised water   35.05     parts(e)    deionised water   4.30      parts  sodium erythorbate                    0.25      parts  0.1% ferrous sulphate soln.                    0.91      parts(f)    Coalescing agent4                    8.96      parts______________________________________ 1 DER337 (ex Dow chemicals) 2 DER732 polyglycol epoxy (ex Dow Chemicals) 3 "Teric" N40 (ex ICI Australia Ltd.) 4 "Texanol" (ex Eastman Chemical Co.)
Preparation of multi-polymer particle dispersion ______________________________________(a)    epoxy resin1 9.51      parts(b)    epoxy resin2 14.27     parts  methyl methacrylate                    11.59     parts  butyl methacrylate                    7.43      parts  hydroxypropyl methacrylate                    4.76      parts  stabiliser3  2.47      parts(c)    t-butyl perbenzoate                    0.59      parts(d)    deionised water   4.76      parts(e)    deionised water   38.34     parts(f)    deionised water   5.05      parts  sodium erythorbate                    0.30      parts  0.1% ferrous sulphate soln.                    0.93      parts______________________________________ 1 DER662 (ex Dow Chemicals) 2 "Epikote" 828 (ex Shell Chemical Co.) 3 "Teric" N40 (ex ICI Australia Ltd.)
Pack A ______________________________________(a)    sodium hexametaphosphate                     0.12     parts(b)    27% ammonium hydroxide                     0.12     parts  water-dispersible soya lecithin                     1.24     parts(c)    titanium dioxide   41.68    parts(d)    deionised water    9.95     parts(e)    propylene glycol   2.52     parts(f)    antifoam1     0.37     parts(g)    thickener solution2                     0.71     parts(h)    multi-polymer particle                     42.55    parts  dispersion (as previously  prepared)  deionised water    0.64     parts  bactericide        0.10     parts______________________________________ 1 "Foamaster" NXZ (ex Diamond Shamrock Corp.) 2 a 50% solution of GR708 (ex Rohm and Haas Co.) in a 60/40 mixture of propylene glycol and water.
Material (a) was dissolved in material (d), then materials (b) were added and the mixture was stirred at high speed until all of the ingredients were incorporated (about 5 minutes). To this mixture half of material (c) was added, followed by half of material (e). When the pigment was incorporated, the remainder of both materials (c) and (e) was added and the mixture stirred at high speed until the dispersion had a maximum particle size of less than 1 um (this took about 30 minutes). Material (f), and then material (g) were added; finally, material (h) was added and thoroughly incorporated with slow stirring, and the mixture was filtered.
Pack B ______________________________________(a)      polyamide1                9.96        parts    deionised water                21.19       parts(b)      deionised water                68.85       parts______________________________________ 1 "Versamid" (trade mark) 125 (ex A. C. Hatrick)
Pack A ______________________________________(a)      epoxy resin1                31.01       parts    stabiliser2                1.63        parts(b)      deionised water                6.22        parts(c)      deionised water                61.14       parts______________________________________ 1 DER 337 (ex Dow Chemical Co.) 2 "Teric" N40 (ex ICI Australia)
Pack B ______________________________________(a)    polyamide1   35.27     parts  methyl methacrylate                    6.24      parts  butyl acrylate    3.96      parts  hydroxypropyl methacrylate                    2.60      parts  stabiliser2  1.92      parts(b)    t-butyl perbenzoate                    0.32      parts(c)    deionised water   5.21      parts(d)    deionised water   34.94     parts(e)    deionised water   8.01      parts  sodium erythorbate                    0.52      parts______________________________________ 1 "Versamid 100" (Ex A. C. Hatrick) 2 "Teric" N40 (ex ICI Australia Ltd.)
Pack A ______________________________________(a)    epoxy resin1  31.74    parts  methyl methacrylate                     13.61    parts  stabiliser2   2.27     parts(b)    t-butyl perbenzoate                     0.37     parts(c)    deionised water    4.29     parts(d)    deionised water    39.73    parts(e)    deionised water    2.11     parts  sodium erythorbate 0.16     parts  0.1% ferrous sulphate solution                     0.95     parts(f)    Coalescent3   4.77     parts______________________________________ 1 "Epikote" 828 (ex Shell Chemical Co) 2 "Teric" N40 (ex ICI Australia) 3 "Texanol" (Trade Mark) (Eastman Chemical)
Pack B ______________________________________(a)      Polyamide   10.00       parts(d)      deionised water                90.00       parts______________________________________
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3620989 *Sep 15, 1969Nov 16, 1971Pacific Vegetable Oil CorpAlkyds of unsaturated dibasic acids, polyols, and unsaturated fatty acid esters and method for making same: emulsion copolymerization of said alkyds with polymerizable monomers and the resulting polymersUS3847851 *Jun 13, 1973Nov 12, 1974Dainippon Toryo KkThermosetting synthetic polymer dispersions and process for production thereofUS4217261 *Jan 8, 1979Aug 12, 1980Desoto, Inc.Air drying thermosetting aqueous epoxy-acrylic copolymer coating systemsUS4373054 *Jul 6, 1981Feb 8, 1983Gibson David VDispersion process and productUS4413073 *Jun 29, 1982Nov 1, 1983Ici Australia LimitedPolymer particles and unsaturated monomer with stabilizerUS4482659 *Oct 21, 1983Nov 13, 1984Westinghouse Electric Corp.Toughened thermosetting compositions for compositesUS4544686 *May 30, 1984Oct 1, 1985Imperial Chemical Industries PlcCoating compositionsJPS5367000A * Title not availableSU429658A1 * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5008308 *Feb 17, 1989Apr 16, 1991Kawasaki Steel Corp.Thermal adhesive coating composition based on epoxy resin, high Tg polymer, amine curing agent and film forming agentUS5207825 *Jul 30, 1991May 4, 1993Xerox CorporationBisphenol modified polyether additive and color for printingUS5242489 *Dec 1, 1992Sep 7, 1993Xerox CorporationInk jet printing processesUS6021159 *Dec 18, 1997Feb 1, 2000Ikegami Tsushinki Co., Ltd.Circuit for measuring transmission quality of demodulated digital signal transmitted under carrier modulation transmission system* Cited by examinerClassifications U.S. Classification523/406, 524/906, 523/402International ClassificationC09D201/00, C09D157/00, C09D163/00, C09D5/02Cooperative ClassificationY10S524/906, C09D163/00, C09D157/00European ClassificationC09D163/00, C09D157/00Legal EventsDateCodeEventDescriptionDec 7, 1999FPExpired due to failure to pay maintenance feeEffective date: 19990929Sep 26, 1999LAPSLapse for failure to pay maintenance feesApr 20, 1999REMIMaintenance fee reminder mailedFeb 10, 1995FPAYFee paymentYear of fee payment: 8Feb 7, 1992ASAssignmentOwner name: DULUX HOLDINGS LIMITEDFree format text: CHANGE OF NAME;ASSIGNOR:DULUX AUSTRALIA LTD.;REEL/FRAME:006007/0943Effective date: 19910819Oct 4, 1991ASAssignmentOwner name: ICI AUSTRALIA OPERATIONS PROPRIETARY LIMITEDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DULUX HOLDINGS LIMITED;REEL/FRAME:005861/0798Effective date: 19910709Feb 15, 1991FPAYFee paymentYear of fee payment: 4Jul 31, 1986ASAssignmentOwner name: DULUX AUSTRALIA LTD., MCNAUGHTON ROAD, CLAYTON, VIFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:ADENEY, HILARY E.;HALL, DERRARD M.;REEL/FRAME:004583/0232Effective date: 19850815Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ADENEY, HILARY E.;HALL, DERRARD M.;REEL/FRAME:004583/0232Owner name: DULUX AUSTRALIA LTD.,AUSTRALIARotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google