Redispersible powder compositions for preparing photographic recording materials
AssigneeWacker Chemie AG
InventorsKlaus Kohlhammer, Wolfgang Roth-Greiner, Reiner Figge, Reinhard Haerzschel
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Abstract
The invention is a ready-to-use, water-redispersible powder composition useful for preparing photographic recording materials or inkjet recording materials, which comprises a mixture containing polymers made from ethylenically unsaturated monomers and gelatin, wherein the polymers are prepared by emulsion polymerization in the presence of at least one emulsifier selected from emulsifiers with ionic and nonionic groups and if exclusively ionic emulsifiers are used, the copolymerization is carried out in the presence of comonomers which contain one or more groups selected from --COOH, --OH, SO.sub.3.sup.-, NCH.sub.2 OH and --C.dbd.O.
Claims20
A ready-to-use, water-re-dispersible powder composition useful for preparing photographic recording materials or inkjet recording materials comprising a mixture of at least one polymer made from ethylenically unsaturated monomers physically compounded with gelatin, wherein the polymers are prepared by emulsion polymerization, in the presence of at least one emulsifier selected from the group consisting of emulsifiers with ionic and nonionic groups and provided that when exclusively ionic emulsifiers are used, the copolymerization is carried out in the presence of ethylenically unsaturated comonomers which contain at least one group selected from the group consisting of --COOH, --OH, SO.sub.3, --NCH.sub.2 OH and --C--O.
Dependencies are inferred from the claim text.