Patent ID: 7582695
Filing Date: 2009-09-01
Classification: C04B

Abstract:
1. A process for jointing with sand, comprising forming a jointing composition by adding a binder to dry sand, the binder consisting essentially of a powder composition of one or more redispersible polymer powders, at least one redispersible polymer powder being a functionalized, redispersible polymer powder selected from the group consisting of a) polyvinyl alcohol-stabilized copolymers comprising the polymerized product of at least one monomer selected from the group consisting of vinyl esters of straight-chain or branched alkylcarboxylic acids having 1 to 18 carbon atoms; (meth)acrylates of branched or straight-chain alcohols or diols having 1 to 18 carbon atoms; dienes; olefins; vinylaromatics; and vinyl halides, b) polymers comprising the polymerized product of at least one monomer selected from the group consisting of vinyl esters of straight-chain or branched alkylcarboxylic acids having 1 to 18 carbon atoms; (meth)acrylates of branched or straight-chain alcohols or diols having 1 to 18 carbon atoms; dienes; olefins; vinylaromatics; and vinyl halides, said polymers stabilized with polymers comprising ethylenically unsaturated mono- or dicarboxylic acids or anhydrides thereof, having an acid content of from 50 to 99 mol %, c) optionally, when copolymer a) is employed, a bifunctional masked aldehyde, and d) optionally, a pulverulent acidic or basic additive, and sweeping the jointing composition in dry or moist form into joints.