# US 2018/0022858 A1 · Highly elastic polyester modified urethane resin and clear coat composition containing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022858 A1 - Document ID: US20180022858A1 - Status: Published application - Kind: A1 - Application number: 15/539,248 - Filed: 2015-04-15 - Published: 2018-01-25 - Earliest claimed: 2014-12-24 - Assignees: Kcc Corporation - Applicants: KCC Corporation - Inventors: Yong Ho CHOI; Myong Gi CHOI; Bon Yi LEE; Chan Hun KIM; Jong Yun PARK; Jong Wook YUN - Web page: https://patentgrep.com/patent/US20180022858A1 ## CPC - C08G 18/423: {containing cycloaliphatic groups} - C08G 18/4202: {Two or more polyesters of different physical or chemical nature (C08G18/44 takes precedence)} - C08G 18/4241: {from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional} - C08G 18/4277: {Caprolactone and/or substituted caprolactone} - C08G 18/73: acyclic - C08G 63/685: containing nitrogen - C08G 63/916: {Dicarboxylic acids and dihydroxy compounds} - C09D 5/00: Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes - C09D 5/4465: {Polyurethanes} - C09D 7/65: macromolecular (C09D7/41-C09D7/48 take precedence) - C09D 133/00: Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers - C09D 175/06: from polyesters - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - 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) ## Abstract Embodiments relate to a highly elastic polyester modified urethane resin and a clear coat composition containing the same, and more particularly, to a highly elastic polyester modified urethane resin having improved chipping resistance by introducing an aliphatic isocyanate and a caprolactone polyol to a polyester resin, and a clear coat composition including the polyester modified urethane resin as a main resin. For example, there is provided a polyester modified urethane resin, including polyester derived units obtained from an aliphatic polyalcohol and an aliphatic or alicyclic polyacid, caprolactone polyol derived units; and aliphatic diisocyanate derived units, as resin constituting units. ## Claims ### Claim 1 A polyester modified urethane resin, comprising: polyester derived units obtained from an aliphatic polyalcohol and an aliphatic or alicyclic polyacid; caprolactone polyol derived units; and aliphatic diisocyanate derived units, as resin constituting units. ### Claim 2 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic polyalcohol is at least one kind of aliphatic compound having 3 to 12 carbon atoms and at least two hydroxyl groups. ### Claim 3 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic polyalcohol is selected from propanediol, butanediol, neopentyl glycol, trimethylol propane and a combination thereof. ### Claim 4 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic or alicyclic polyacid is at least one aliphatic polyacid having 3 to 12 carbon atoms and at least two carboxylic acid groups, at least one alicyclic polyacid having 5 to 12 carbon atoms and at least two carboxylic acid groups, or a mixture thereof. ### Claim 5 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic or alicyclic polyacid is selected from hexane dicarboxylic acid, cyclohexyl dicarboxylic acid, and a combination thereof. ### Claim 6 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic diisocyanate is at least one aliphatic or alicyclic hydrocarbon compound having 4 to 20 carbon atoms and at least two isocyanate groups. ### Claim 7 (depends on 1) The polyester modified urethane resin of claim 1, wherein the aliphatic diisocyanate is selected from hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, and a combination thereof. ### Claim 8 (depends on 1) The polyester modified urethane resin of claim 1, having a hydroxyl value of 30-200 mgKOH, and an acid value of 1-50 mgKOH/g. ### Claim 9 A method of preparing a polyester modified urethane resin, comprising: reacting an aliphatic polyalcohol with an aliphatic or alicyclic polyacid to synthesize a polyester intermediate; and reacting the polyester intermediate thus synthesized, a caprolactone polyol, and an aliphatic diisocyante to synthesize a polyester modified urethane resin. ### Claim 10 (depends on 1) A clear coat composition, comprising: 5-30 parts by weight of the polyester modified urethane resin according to claim 1; 20-60 parts by weight of a silane modified acryl polyol resin; 5-30 parts by weight of a curing agent; 0.5-3 parts by weight of a curing catalyst; and 10-25 parts by weight of a solvent, based on 100 parts by weight of a total amount of the clear coat composition. ### Claim 11 (depends on 10) The clear coat composition of claim 10, wherein the silane modified acryl polyol resin has a weight average molecular weight (Mw) of 5,000-10,000, a hydroxyl value of 20-120 mgKOH/g, and a glass transition temperature of 10-80° C. ### Claim 12 (depends on 10) A molded article comprising at least one coating film formed using the clear coat composition of claim 10.