Patent ID: 6162505
Filing Date: 2000-12-19
Classification: C04B,C08F,C09D

Abstract:
A process for coating mineral moldings with film-forming aqueous formulations in which in succession at least one 1st formulation comprising at least one copolymer P1 as a binder and at least one inorganic pigment is applied to the mineral moldings, and then at least one 2nd formulation comprising at least one copolymer P2 as a binder pigment is applied, the copolymers P1 and P2 each being composed of monomers A, B and, optionally C, wherein:the monomers A are vinyl aromatic compounds (A1) and/or methacrylic esters of C.sub.1 -C.sub.4 -alkanols (A2),the monomers B are esters, other than A2, of .alpha.,.beta.-ethylenically unsaturated carboxylic acids with C.sub.1 -C.sub.12 -alkanols (B1) and/or vinyl esters of aliphatic carboxylic acids (B2), and the monomers C are different .alpha.,.beta.-ethylenically unsaturated monomers,wherein both copolymers P1 and P2 comprise either monomers A1 or monomers A2 or both P1 and P2 comprise monomers A1 and A2 as copolymerized monomers A and both P 1 and P2 comprise either monomers B1 or monomers B2 or both P1 and P2 comprise monomers B1 and B2 as copolymerized monomers B, with the proviso that:either identical monomers A and B are selected for the copolymers P1 and P2 orthe monomers A in P1 and P2 differ in their carbon number by not more than 2 carbon atoms and/or the monomers B in P1 and P2 differ in their carbon number by not more than 2 carbon atoms, andthe 1st formulation has a pigment volume concentration which is geater by at least 10% than that of the 2nd formulation.