# US 8,771,797 B2 · Aqueous coating composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,797 B2 - Document ID: US8771797B2 - Status: Granted - Kind: B2 - Application number: 13/122,628 - Filed: 2009-10-29 - Published: 2011-07-28 - Granted: 2014-07-08 - Earliest claimed: 2008-10-30 - Assignees: Axalta Coating Systems IP Co., LLC - Applicants: Georges Hendrickx; Jozef Theresia Huybrechts; Christiaan Engels - Inventors: Georges Hendrickx; Jozef Theresia Huybrechts; Christiaan Engels - Web page: https://patentgrep.com/patent/US8771797B2 ## CPC - C09D 151/08: grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds - C08F 265/00: Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 - C08F 265/04: on to polymers of esters - C08F 283/00: Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G - C08F 289/00: Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00 - C08F 290/00: Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups - C08F 290/06: Polymers provided for in subclass C08G - C09D 151/00: Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds (based on ABS polymers C09D155/02); Coating compositions based on derivatives of such polymers - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## Abstract The invention relates to aqueous coating compositions comprising a cross-linkable binder resin and a liquid carrier, wherein said cross-linkable binder resin comprises a copolymer A) comprising: 5 to 64% by weight of a reaction product of at least one fatty acid having at least one ethylenically double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality of 2 to 8, wherein the % by weight are relative to the binder solids of copolymer A). ## Claims ### Claim 1 Aqueous coating composition comprising: a cross-linkable binder resin and a liquid carrier, wherein said cross-linkable binder resin comprises a copolymer A) comprising: 5 to 64% by weight of a reaction product of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality of 2 to 8, wherein the % by weight are relative to the binder solids of copolymer A) and wherein the fatty acid in the reaction product of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality is ricinoleic acid. ### Claim 2 (depends on 1) Aqueous coating composition of claim 1, wherein the copolymer A) comprises 10 to 50% by weight of the reaction product of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality of 2 to 8, wherein the % by weight are relative to the binder solids of copolymer A). ### Claim 3 (depends on 1, 2) Aqueous coating composition of claim 1 or 2, wherein copolymer A) has an acid number of at least 10 mg KOH/g solids. ### Claim 4 (depends on 3) Aqueous coating composition of claim 3, wherein copolymer A) has an acid number of 15 to 80 mg KOH/g solids. ### Claim 5 (depends on 1) Aqueous coating composition of claim 1, wherein copolymer A) has a hydroxyl number of 50 to 250 mg KOH/g solids and a number average molecular weight Mn of 800 to 8000. ### Claim 6 (depends on 1) Aqueous coating composition of claim 1, wherein copolymer A) comprises a) 5 to 64% by weight of the reaction product of ricinoleic acid with a polyalcohol having a hydroxyl functionality of 2 to 8 and b) 36 to 95% by weight of unsaturated monomers comprising: b1) at least one hydroxyl-functional unsaturated monomer, b2) at least one acid-functional unsaturated monomer and b3) optionally at least one other polymerizable unsaturated monomer different from monomers b1) and b2), wherein the % by weight of a) and b) are adding up to 100%. ### Claim 7 (depends on 1) Aqueous coating composition of claim 1, wherein copolymer A) comprises a) 5 to 64% by weight of the reaction product of ricinoleic acid with a polyalcohol having a hydroxyl functionality of 2 to 8, b1) 0 to 60% by weight of at least one hydroxyalkyl ester with at least one primary or secondary hydroxyl group derived from alpha, beta-ethylenically unsaturated monocarboxylic acids, b2) 2 to 40% by weight of at least one unsaturated acid functional monomer, b3.1) 0 to 50% by weight of at least one ester of (meth)acrylic acid with aliphatic monohydric branched or linear as well as cyclic alcohols with 1 to 20 C atoms and b3.2) 0 to 50% by weight of at least one unsaturated vinyl aromatic monomer, wherein the % by weight of reaction product a) and monomers b1) to b3.2) are adding up to 100%. ### Claim 8 (depends on 1) Aqueous coating composition of claim 1, wherein the reaction product of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality of 2 to 8 is the triglyceride of ricinoleic acid. ### Claim 9 (depends on 1) Aqueous coating composition of claim 1, wherein the reaction product of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyalcohol having a hydroxyl functionality of 2 to 8 is castor oil. ### Claim 10 (depends on 1) Aqueous coating composition of claim 1, wherein the copolymer A) is prepared by polymerizing monomers b1) to b3) in the presence of at least 20% by weight of the total amount of the reaction product of ricinoleic acid with a polyalcohol having a hydroxyl functionality of 2 to 8. ### Claim 11 (depends on 6) Aqueous coating composition of claim 6, wherein the copolymer A) is a graft copolymer comprising: 8-92% by weight of the graft copolymer of a polymeric backbone of polymerized reaction product a) and monomers b) and further comprising 92-8% by weight of the graft copolymer, of a macromonomer c) attached to said polymeric backbone at a single terminal point of said macromonomer, wherein the % by weight are adding up to 100%, said macromonomer having a number average molecular weight Mn of 500-8000 and comprising 10 to 100% by weight of the macromonomer of ethylenically unsaturated acid-functional and/or amine-functional monomers. ### Claim 12 (depends on 11) Aqueous coating composition of claim 11, wherein the copolymer A) is prepared by polymerizing monomers b1) to b3) in presence of a mixture of 20 to 80% by weight of the reaction product a) of at least one fatty acid having at least one ethylenic double bond and one hydroxyl group in the molecule with a polyol having a hydroxyl functionality of 2 to 8 and 20 to 80% by weight of macromonomer c), wherein the % by weight are adding up to 100%. ### Claim 13 (depends on 1) Aqueous coating composition of claim 1, further comprising a cross-linking agent. ### Claim 14 (depends on 1) A process for the preparation of a coating layer, comprising the successive steps: 1) applying a coating layer from a coating composition of claim 1 to a substrate, 2) optionally, flashing off the applied coating layer to remove volatile compounds, and 3) curing the coating layer. ### Claim 15 (depends on 14) The process of claim 14, wherein the coating layer is selected from the group consisting of a single-layer coating and a coating layer within a multilayer coating. ### Claim 16 (depends on 14, 15) The process of claim 14 or 15, wherein the coating layer is selected from a group consisting of a clear top coat layer and a pigmented single-stage top coat layer.