Patent ID: 7538153

Claim:
A process for coating an inkjet-recording substrate comprising applying a coating prepared from a pulverulent coating material composition comprising a) one or more pulverulent, silane-containing polyvinyl alcohols based on fully or partly hydrolyzed vinyl ester copolymers having a degree of hydrolysis of 75 to 100 mol %, and b) one or more water-redispersible polymer powders based on homopolymers or copolymers of one or more monomers selected from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having 1 to 15 carbon atoms, vinyl aromatics, olefins, dienes, and vinyl halides, wherein the silane-containing polyvinyl alcohols are obtained by copolymerization of 0.01 to 10 mol % of one or more silane-containing comonomers selected from the group consisting of ethylenically unsaturated silicon compounds of the formula R 1 SiR 2 0-2 (OR 3 ) 1-3 , and silane group comprised meth(acrylamides), of the general formula CH 2 ═CR 5 —CO—NR 6 —R 7 —SiR 8 m —(R 9 ) 3-m , wherein R 1 is CH 2 ═CR 4 —(CH 2 ) 0-3 or CH 2 ═CR 4 CO 2 (CH 2 ) 1-3 , R 2 is a C 1 to C 3 alkyl radical, C 1 to C 3 alkoxy radical or halogen, R 3 is an unbranched or branched, optionally substituted alkyl radical having 1 to 12 carbon atoms, or an acyl radical having 2 to 12 carbon atoms, R 3 optionally interrupted by an ether group, R 4 is H or CH 3 , and m is 0 to 2, R 5 is H or a methyl group, R 6 is H or an alkyl group having 1 to 5 carbon atoms, R 7 is an alkylene group having 1 to 5 carbon atoms or a divalent organic group in which the carbon chain is interrupted by an oxygen or nitrogen atom, R 8 is an alkyl group having 1 to 5 carbon atoms, and R 9 is an alkoxy group having 1 to 40 carbon atoms, which may be substituted by further heteroatoms.