Patent ES-8502717-A1 (ES)
Title: Poly:hydroxy-acrylic copolymer poly:isocyanate coating compsn.
Filed: 1983-08-24
Abstract: Coatings are based on reaction prods. of (A) polyhydroxy-acrylate resins; and (B) polyisocyanates of functionality  2.5-6 having cycloaliphatic bound NCO gps., and which may be capped by CH, NH or OH gp. contg. blocking agents. - (A) are copolymers of (a) 6-70 wt.% HO-R'-O-CO-C(R)=CH2 (R is H or CH3 and R' is (branched) 2-10C alkylene or a 7-17C alkylene gp. contg. up to three cycloaliphatic gps.; (b) 0-40 wt.% R"-CO-O-CH2-CH(OH)-CH2-O-CO-C(R)=CH2 in which R is H or CH3 and R" is alkyl gp. or branched 4-26C aliphatic carboxylic acid; (c) 10-50 wt.% alkyl ester(s) of (meth)acrylic acid giving a homo-polymer with Tg +5 to +120 deg. C; (d) 0-10 wt.% vinyl aromatic cpd.; (e) 10-60 wt.% alkyl ester and/or up to two ether oxygen bridge-contg. alkyl glycol esters of (meth)acrylic acid giving a homo-polymer with Tg -80 to +4.5 deg. C; (f) 0-10 wt.% amide of (meth)acrylic acid in which N atom may be substd. ; (g) 1-26 wt.% polymerisable, olefinically unsatd. heterocyclic cpd. (I)-(VIII) (R is H or CH3, R1-R4 (opt. the same) are H, (m)ethyl, (branched) 3-4C alkyl, phenyl (opt. substd.) or a gp. -RI-A-RII; A is O or S; RI is (m)ethylene or phenyl (opt. substd.) and RII is (m)ethyl, or phenyl (opt. substd.) a halogen or NO2 gps., or a gp. of formula ORIII, -COORIII, -SO2RIII, -CONRIIIRIV or -SO2NRIIIRIV on which RIII and RIV (opt. the same) are (m)ethyl, 3-4C (branched) alkyl gp. or phenyl (opt. substd.) and in (I), (II), (III), (V), (VI) and (VIII), R2 and R3 or in (III), R3 and R4, in (II) and (IV) and R3 and R4 or R1 and R2 and in (II) and (IV), R3 and R4 or R1 and R2 may together complete a condensed aromatic 6-ring (opt. substd.) and (h) 0-20 wt.% monomers other than (a)-(g) whose gps. are inert w.r.t. NOC gps. (a)+(b)=6-70%, (c)+(d)+(g)=10-60% and sum of (a)- EPAB- EP--99011 B A process for the prodn. of a coating based on a reaction prod. of (A) a polyhydroxy polyacrylate resin comprising esters of acrylic acid or methacrylic acid with monofunctional aliphatic alcohols, monoesters of acrylic acid or methacrylic acid with polyfunctional aliphatic alcohols and other copolymerisable olefinically unsatd. monomers, with (B) isocyanurate-contg. polyisocyanates which have a functionality of from 2.5 to 6 and which may be partially or completely blocked  CH-, NH- or OH-acidic blocking agents, wherein the polyhydroxy polyacrylate resin (A) used is a hydroxyl-contg. copolymer comprising a) from 6 to 70% by wt. of one or more esters of the general formula (IX) where R is hydrogen or methyl, R' is straight-chain or branched alkylene of 2 to 18  carbon atoms or an alkylene radical of 7 to 17 carbon atoms which contains up to three cycloaliphatic gps., and, if desired, some or all of the gps. HO-R'-can be replaced by the gp. Z-O-R'-, where Z is a radical of the general formula, (XII) where n is an integer from 1 to 3 and R'' is an alkylene chain of 4 to 8 carbon atoms which may additionally contain from 1 to 3 alkyl substits. having a total of not more than 10 carbon atoms and/or a cycloaliphatic radical of 6 to 10 carbon atoms and/or an unsubstitd. or alkyl-substd. aromatic radical of 6 to 8 carbon atoms and/or an araliphatic radical of 7 to 9 carbon atoms and/or an alkoxy radical of 1 to 8 carbon atoms, b) from 0 to 40% by wt. of one or more hydroxyalkyl esters of acrylic acid and/or methacrylic acid of the general formula (XIII) where R is hydrogen or methyl, and R''' is an alkyl radical of a branched aliphatic carboxylic acid of 4 to 26 carbon atoms, c) from 10 to 50% by wt. of one or more alkyl acrylates and/or methacrylates which form homopolymers having glass transition temps. of from +5 deg. C to +120 deg. C, d) from 0 to 10% by wt. of a vinyl-aromatic, e) from 10 to 60% by wt. of one or more alkyl esters, and/or alkylglycol esters contg. up t - EP--99011 B A process for the prodn. of a coating based on a reaction prod. of (A) a polyhydroxy polyacrylate resin comprising esters of acrylic acid or methacrylic acid with monofunctional aliphatic alcohols, monoesters of acrylic acid or methacrylic acid with polyfunctional aliphatic alcohols and other copolymerisable olefinically unsatd. monomers, with (B) isocyanurate-contg. polyisocyanates which have a functionality of from 2.5 to 6 and which may be partially or completely blocked CH-, NH- or OH-acidic blocking agents, wherein the polyhydroxy polyacrylate resin (A) used is a hydroxyl-contg. copolymer comprising a) from 6 to 70% by wt. of one or more esters of the general formula (IX) where R is hydrogen or methyl, R' is straight-chain or branched alkylene of 2 to 18 carbon atoms or an alkylene radical of 7 to 17 carbon atoms which contains up to three cycloaliphatic gps., and, if desired, some or all of the gps. HO-R'-can be replaced by the gp. Z-O-R'-, where Z is a radical of the general formula, (XII) where n is an integer from 1 to 3 and R'' is an alkylene chain of 4 to 8 carbon atoms which may additionally contain from 1 to 3 alkyl substits. having a total of not more than 10 carbon atoms and/or a cycloaliphatic radical of 6 to 10 carbon atoms and/or an unsubstitd. or alkyl-substd. aromatic radical of 6 to 8 carbon atoms and/or an araliphatic radical of 7 to 9 carbon atoms and/or an alkoxy radical of 1 to 8 carbon atoms, b) from 0 to 40% by wt. of one or more hydroxyalkyl esters of acrylic acid and/or methacrylic acid of the general formula (XIII) where R is hydrogen or methyl, and R''' is an alkyl radical of a branched aliphatic carboxylic acid of 4 to 26 carbon atoms, c) from 10 to 50% by wt. of one or more alkyl acrylates and/or methacrylates which form homopolymers having glass transition temps. of from +5 deg. C to +120 deg. C, d) from 0 to 10% by wt. of a vinyl-aromatic, e) from 10 to 60% by wt. of one or more alkyl esters, and/or alkylglycol esters contg. up t USAB- US4532300 A Coating is produced by reacting (A) a polyhydroxy pclyacrylate resin compr sing esters of (meth)acrylic acid with monofunctional aliphatic alcohols, monoesters of (meth)acrylic acid with polyfunctional aliphatic alcohols and other copolymerisable olefinically unsaturated monomers, with (B) isocyanurate-contg. polyisocyanates which have a functionality of 2.5 to 6 ano which may be partially or completely blocked with CH-, NH- or OH-acidic blocking agents. - (A) used is a hydroxyl-contg. copolymer comprising (a) 6-70% by wt. of one or more esters, (b) 0-40% by wt. or 0-50% by wt., respectively of one or more hydroxyalkyl esters of (meth)acrylic acid. (c) 10-50% by wt. of one or more alkyl (meth)acrylates; (d) 0-10% by wt. of a vinyl-aromatic; (e) 10-60% by wt. of one or more alkyl esters, or alkylglycol esters contg. not more than 2 etheroxygen bridges of (meth)acrylic acid; (f) 0-10% by wt. of a (meth)acrylamide; (g) 1-25% by wt. of one or more polymerisable, olefinically unsatd. imidazole, pyridine, quinoline, isoquinoline, quinoxaline, pyrimidine or pyridazine cpds. of specific structure.