Wacker Chemie Ag

Gerhard Kögler

Hans-Peter Weitzel

Abdulmajid Hashemzadeh

Timo Melchin

Helmut Zecha

Muhammad Babar

Stephan Kaiser

Jessica Seidel

Holger Künstle

The object of the invention is the use of an aqueous dispersion of a vinylacetate-ethylene-copolymer and of at least one polyethylene imine as a binder in a carpet coating composition for the production of carpets.

Binder for carpet coating compositions

The invention relates to a method for applying dispersion adhesives containing one or more polyvinyl esters and optionally one or more additives, characterized in that one or more polyvinyl esters are produced by radical-initiated, continuous emulsion polymerization of a) one or more vinyl esters and, optionally, b) one or more additional ethylenically unsaturated monomers, and the dispersion adhesives are applied to a substrate by way of mechanical application methods.

Method for applying dispersion adhesives

A process for preparing a vinyl acetate-ethylene copolymer by means of free-radically initiated emulsion polymerization of vinyl acetate and ethylene and, optionally, further comonomers, performed in the presence of at least one protective colloid and at least one nonionic, ethoxylated emulsifier with an alkyl radical or at least one ethylene oxide-propylene oxide copolymer, and in the absence of chain transfer agent, and, before the initiation of the polymerization, 10% to 70% by weight of the vinyl acetate monomer and 40% to 100% by weight of the ethylene monomer are included in the initial charge, up to 100% by weight of the protective colloid fraction is included in the initial charge, at least 25% by weight of the emulsifier fraction is included in the initial charge, and the remaining fractions of monomers, protective colloid and emulsifier are metered in during the polymerization. A defined criterion of process COP is met.

Process for preparing vinyl acetate-ethylene copolymers by means of emulsion polymerization

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Burgkirchen, Germany

Gerhard Kögler