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AssigneeWacker Chemie AG
InventorsHolger Künstle, Timo Melchin, Robert Tangelder
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The invention relates to an aqueous vinyl acetate-ethylene-copolymer dispersion for carpet coating compositions, which is obtained by means of radical-initiated emulsion polymerization, in an aqueous medium, of vinyl acetate and ethylene and optionally additional ethylenically unsaturated comonomers, characterized in that, for stabilization of the dispersion, 5 to 10 wt %, based on the total weight of the comonomers, of one or a plurality of partially saponified and low-molecular polyvinyl alcohols having a hydrolysis degree of 80 to 95 mol % and a Höppler viscosity, in 4% aqueous solution, of 1 to 5 mPas (method according to Höppler at 20° C., DIN 53015) are contained.
A carpet coating composition for consolidating carpets, which comprises an aqueous vinyl acetate-ethylene copolymer dispersion obtained via free-radically initiated emulsion polymerization, in an aqueous medium, of vinyl acetate and ethylene and optionally further ethylenically unsaturated comonomers, wherein the dispersion comprises a stabilizing system comprising from 5 to 10 wt %, based on total comonomers, of one or more partially hydrolyzed and low molecular weight polyvinyl alcohols having a hydrolysis degree of respectively 80 to 95 mol % and a Hoeppler viscosity, in 4% aqueous solution, of respectively 1 to 5 mPas (DIN 53015 Hoeppler method at 20° C.) and comprising from 100 to 1400 wt % of filler, based on 100 wt % of vinyl acetate-ethylene copolymer (solids/solids).
Dependencies are inferred from the claim text.