# US 12,595,395 B2 · Kit-of-parts for curable polyaspartic acid ester-based coating compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,595,395 B2 - Document ID: US12595395B2 - Status: Granted - Kind: B2 - Application number: 17/905,522 - Filed: 2021-02-23 - Published: 2023-04-20 - Granted: 2026-04-07 - Earliest claimed: 2020-03-04 - Assignees: BASF Coatings GmbH - Applicants: BASF Coatings GmbH - Inventors: Michel Lincker; Jerome Carlier; Yannick Pichot - Web page: https://patentgrep.com/patent/US12595395B2 ## CPC - C08G 18/3821: {Carboxylic acids; Esters thereof with monohydroxyl compounds} - C09D 175/06: from polyesters - C08G 18/792: {formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates} - C09D 175/04: Polyurethanes - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - 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) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract Disclosed herein is a kit-of-parts for preparation of a curable coating composition including in a first container an isocyanate-reactive compound (A) including a polyaspartic acid ester compound, in a second container a polyisocyanate (B), and in a third container a solvent (S1) selected from the group consisting of monoalcohols and alkoxymonoalcohols, where UVA and/or HALS additives are optionally contained in the first and/or third container, and a second solvent (S2) is optionally contained in the second or third container. Further disclosed herein are a coating composition prepared from the kit-of-parts, a process for preparing at least one coating on an optionally pretreated and optionally precoated substrate, and coated substrates derived therefrom. ## Claims ### Claim 1 A kit-of-parts for preparation of a curable coating composition, comprising three separate containers C1, C2, and C3, wherein a) the container C1 contains an isocyanate-reactive component (A) comprising a polyaspartic acid ester compound; b) the container C2 contains a polyisocyanate (B); c) the container C3 contains a solvent (S1); wherein container C2 and/or container C3 optionally contains a solvent (S2); and wherein container C1 and/or container C3 optionally contains an additive (AD); characterized in that solvent (S1) is selected from the group consisting of monoalcohols and alkoxymonoalcohols; solvent (S2) is a ketone; and additive (AD) is selected from the group consisting of UV absorbers and hindered amine light stabilizers. ### Claim 2 (depends on 1) The kit-of-parts according to claim 1, wherein container C1 comprises a total amount of less than 10 weight % of solvent (S1), solvent (S2), and/or additives (AD), based in each case on the total weight of container C1. ### Claim 3 (depends on 1) The kit-of-parts according to claim 1, wherein the monoalcohols are selected from the group consisting of methanol, ethanol, n- and iso-propanol, butanol, 1-butanol (n-butanol), 2-butanol (sec-butanol), 2-methylpropan-1-ol (iso-butanol), and 2-methylpropanol (tert-butanol). ### Claim 4 (depends on 1) The kit-of-parts according to claim 1, wherein the alkoxymonoalcohols are selected from the group consisting of glycol ethers. ### Claim 5 (depends on 1) The kit-of-parts according to claim 1, wherein solvent (S2) is an asymmetrical ketone represented by the general formula RaC(═O)Rb, wherein Ra and Rb are not identical alkyl groups directly bound to a carbonyl group C═O, wherein Ra is any series of univalent radicals of the general formula CpH2p+1 derived from unsubstituted aliphatic hydrocarbons, having a straight arrangement of constituent carbon atoms containing 1 to 4 carbon atoms, and wherein Rb is any series of univalent radicals of the general formula CpH2p+1 derived from unsubstituted aliphatic hydrocarbons, having a straight or branched arrangement of constituent carbon atoms containing 1 to 6 carbon atoms. ### Claim 6 (depends on 1) The kit-of-parts according to claim 1, wherein solvent (S2) is 5-methylhexan-2-one. ### Claim 7 (depends on 1) The kit-of-parts according to claim 1, wherein the total amount of additives (AD) selected from the group consisting of UV absorbers and hindered amine light stabilizers, based on the total weight of the additives (AD) in the kit-of-parts, is contained in container C3. ### Claim 8 (depends on 1) The kit-of-parts according to claim 1, wherein the polyaspartic acid ester compound has an equivalent weight of about 200 to 500. ### Claim 9 (depends on 1) The kit-of-parts according claim 1, wherein any one of containers C1, C2, and/or C3 further comprises an Additive (AD2) selected from the group consisting of dispersions of surface-treated silica nanoparticles. ### Claim 10 (depends on 1) The kit-of-parts according claim 1, wherein the at least one polyisocyanate (B) comprises at least one aliphatic isocyanate functional material and at least one cycloaliphatic isocyanate functional material, wherein the cycloaliphatic isocyanate functional material is present in a total amount of more than about 50 weight % based on the total weight of the aliphatic and cycloaliphatic isocyanate functional materials contained in polyisocyanate (B). ### Claim 11 (depends on 1) A coating composition prepared from the kit-of-parts according to claim 1 by mixing at least containers C1, C2, and C3. ### Claim 12 (depends on 11) The coating composition according to claim 11, wherein container C1 comprising the isocyanate-reactive component (A) comprising at least one polyaspartic acid ester compound and container C2 comprising the polyisocyanate (B) are mixed at an NH:NCO ratio of from 0.5:10 to 10:0.5. ### Claim 13 (depends on 1) A process for preparing at least one coating on a substrate(S), said process comprising the following steps: (1) optionally applying at least one basecoat composition to at least a part of the substrate to form at least one basecoat layer; (2) applying a coating composition prepared from the kit-of-parts according to claim 1 to at least a part of the substrate or directly to the at least one basecoat layer formed in step (1) to form a coating layer; (3) curing the clearcoat layer formed in step (2), or jointly curing the at least one basecoat layer formed in step (1), if present, and the clearcoat layer formed in step (2). ### Claim 14 (depends on 13) The process according to claim 13, wherein the substrate(S) is an optionally pretreated metallic or plastic substrate coated with a basecoat or with a multilayer coating. ### Claim 15 (depends on 13) A coated substrate(S) obtained by a method as claimed in claim 13. ### Claim 16 (depends on 1) The kit-of-parts according to claim 1, wherein container C1 comprises a total amount of less than 5 weight % solvent (S1), solvent (S2), and/or additives (AD), based in each case on the total weight of container C1. ### Claim 17 (depends on 1) The kit-of-parts according to claim 1, wherein container C1 comprises a total amount of less than 1 weight % of solvent (S1), solvent (S2), and/or additives (AD), based in each case on the total weight of container C1. ### Claim 18 (depends on 1) The kit-of-parts according to claim 1, wherein container C1 comprises no or 0 weight % of solvent (S1), solvent (S2), and/or additives (AD), based in each case on the total weight of container C1. ### Claim 19 (depends on 1) The kit-of-parts according to claim 1, wherein the monoalcohols are selected from the group consisting of n- and iso-propanol, and n-, sec-, and iso-butanol. ### Claim 20 (depends on 1) The kit-of-parts according to claim 1, wherein the monoalcohols are iso-butanol.