| US 7,538,153 B2 | ||
| Compound of a powdery coating agent | ||
| Andreas Bacher, Burghausen (Germany); Karl Ernst Fickert, Altötting (Germany); and Theo Mayer, Julbach (Germany) | ||
| Assigned to Wacker Chemie AG, Munich (Germany) | ||
| Appl. No. 10/553,924 PCT Filed Apr. 21, 2004, PCT No. PCT/EP2004/004233 § 371(c)(1), (2), (4) Date Oct. 21, 2005, PCT Pub. No. WO2004/098898, PCT Pub. Date Nov. 18, 2004. |
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| Claims priority of application No. 103 20 629 (DE), filed on May 08, 2003; and application No. 103 21 941 (DE), filed on May 15, 2003. | ||
| Prior Publication US 2006/0194006 A1, Aug. 31, 2006 | ||
| Int. Cl. C08L 29/04 (2006.01) | ||
| U.S. Cl. 524—503 [427/427.4] | 14 Claims |
| 1. 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 R1SiR20-2(OR3)1-3, and silane group comprised meth(acrylamides), of the general formula CH2═CR5—CO—NR6—R7—SiR8m—(R9)3-m, wherein R1 is CH2═CR4—(CH2)0-3 or CH2═CR4CO2(CH2)1-3, R2 is a C1 to C3 alkyl radical, C1 to C3 alkoxy radical or halogen, R3 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, R3 optionally interrupted by an ether group, R4 is H or CH3, and m is 0 to 2, R5 is H or a methyl group, R6 is H or an alkyl group having 1 to 5 carbon atoms, R7 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, R8 is an alkyl group having 1 to 5 carbon atoms, and R9 is an alkoxy group having 1 to 40 carbon atoms, which may be substituted by further heteroatoms.
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