Polymer blends in the form of aqueous dispersions or powders that can be redispersed in water
AssigneeWacker Chemie AG
InventorsHans-Peter Weitzel, Ulf Dietrich, Peter Fritze, Klas Sorger
Life of this patent
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Abstract
Open time and creep resistance of hydraulically settable inorganic construction materials such as mortars and tile adhesives are both improved at the same time by the addition of a polymer mixture in the form of an aqueous dispersion or water-redispersible powder, containing one or more protective colloid-stabilized polymers having units derived from 20% to 30% by weight of vinyl chloride, 50% to 75% by weight of vinyl acetate, 5% to 20% by weight of ethylene, and one or more protective colloid-stabilized, vinyl halide-free polymers of one or more ethylenically unsaturated monomers.
Claims15
A polymer mixture in the form of an aqueous dispersion or water-redispersible powder, comprising:
- A) one or more protective colloid-stabilized polymers having units derived from 20% to 30% by weight of vinyl chloride, 50% to 75% by weight of vinyl acetate, 5% to 20% by weight of ethylene, and optionally one or more further additional ethylenically unsaturated monomers, where the figures in % by weight are based on the total weight of the monomers and add up to 100% by weight, and
- B) one or more protective colloid-stabilized, vinyl halide-free polymers of one or more ethylenically unsaturated monomers.
Dependencies are inferred from the claim text.