Patent ES-331050-A1 (ES)
Title: A procedure for preparing a composition for coating. (Machine-translation by Google Translate, not legally binding)
IPC: C08F28/00
Filed: 1966-09-09
Abstract: A method of preparing a coating composition, comprising the following steps: A. Solution polymerization, in the presence of a polymerization catalyst, of a mixture constituted by 75 to 95% by weight of methyl methacrylate, 0 to 20% by weight of an ester of a carboxylic acid α, β-unsaturated and a saturated aliphatic monohydric alcohol C2 to C12 and 1.5 to 15 by weight of a carboxylic acid α, unsaturated, to form a carboxylic polymer and then reaction of the carboxylic polymer with an aziridine compound of the formula ** (See formula) ** where R1 is hydrogen, a benzyl radical or a C1 to C5 alkyl radical, R2 and R3 are individually selected from the group consisting of hydrogen, benzyl, aryl or an alkyl radical at C1 to C5 and R4 is hydrogen or a radical C1 to C5 ; B. Polymerization in solution, in the presence of a catalyst, of a mixture consisting of 30 to 70% by weight of methyl methacrylate, 0 to 35% by weight of an ester of a carboxylic acid α, β-unsaturated and a monohydric alcohol saturated C2 to C12, or to 10% by weight of acrylonitrile and 15 to 35% by weight of a compound of the following structural formula ** (See formula) ** where R5 is a C3 to C21 hydrocarbon group of a saturated or unsaturated fatty acid, R6 is hydrogen, a C1 to C4 alkyl group or (see formula), R7 is hydrogen or a C1 to C4 alkyl group and R8 is a C2 to C20 hydrocarbon group of a saturated or unsaturated fatty acid; C. Preparation of a polymer mixture consisting essentially of (a) from 40 to 90% by weight, based on the weight of the polymer mixture, of interpolymer A constituted essentially by (1) from 75 to 95% by weight, on the weight of said interpolymer A, of methyl methacrylate units, (2) less than about 20% by weight of ester units of a & amp; & beta-unsaturated carboxylic acid and a C2 to C12 saturated aliphatic monohydric alcohol. (3) from 3 to 25% by weight of monovalent amino ester radicals bound to the carbon atoms of the spine of the interpolymer of formula ** (See formula) ** where R1 is selected from the group consisting of hydrogen, benzyl and C1 to C5 alkyl radicals, R2 and R3 are individually selected from the group consisting of hydrogen, benzyl, aryl and C1 to C5 alkyl radicals and R4 is selected from the group formed by hydrogen and C1 to C5 alkyl radicals; (b) from 60 to 10% by weight, based on the weight of the polymer mixture, of Interpolymer B constituted essentially by (1) from 30 to 70% by weight, on the weight of said Interpolymer B, of methyl methacrylate units, (2) less than about 35% by weight of ester units of a & amp; & beta-unsaturated carboxylic acid and a C2 to C12 saturated aliphatic monohydric alcohol, (3) less than about 10% by weight of acrylonitrile units and (4) 15 to 35% by weight units of a compound having the following structural formula ** (See formula) ** where R5 is selected from the group consisting of a group C3 to C21 of a saturated fatty acid and a group C3 to C21 of an unsaturated fatty acid, R6 is selected from the group consisting of hydrogen, a C1 to C4 alkyl radical and ** (See formula) ** R7 is selected from the group consisting of hydrogen and alkyl C1 to C4, and R is selected from the group consisting of a hydrocarbon group C2 to C20 saturated fatty acid and a hydrocarbon group C2 to C20 unsaturated fatty acid; D. Pigmentation of the mixture and E. Dilution of the pigmented mixture to form a lacquer composition.