Aqueous polymer dispersions
AssigneeBASF SE
InventorsKurt Wendel, Thomas Schwerzel, Guenter Hirsch
Life of this patent
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Abstract
Aqueous polymer dispersions containing polymers obtainable by free-radical polymerization of unsaturated monomers, and sugared starch, and the use thereof.
Claims43
An aqueous polymer dispersion obtained by free-radical polymerization of a monomer mixture containing from 39 to 69% by weight of at least
- one ester of .alpha.,.beta.-monoethylenically unsaturated mono- and dicarboxylic acids having 3 to 6 carbon atoms with alkanols having 1 to 6 carbon atoms, from 30 to 60% by weight of styrene, from 1 to 10% by weight of at least one monomer selected from the group
- consisting of .alpha.,.beta.-mono-ethylenically unsaturated carboxylic acids having 3 to 6 carbon atoms, amides and nitriles thereof, and
- from 0 to 10% by weight of crosslinking monomers, which contains at least one added starch-degradation product which is water-soluble at room temperature and obtained by hydrolysis in the aqueous phase and has a weight average molecular weight M.sub.w of from 2500 to 25000.
An aqueous polymer dispersion obtained by free-radical polymerization of a monomer mixture containing from 70 to 100% by weight of styrene or butadiene or a mixture thereof, which contains at least one added starch-degradation product which is water-soluble at room temperature and obtained by hydrolysis in the aqueous phase and has a weight average molecular weight M.sub.w of from 2500 to 25000.
An aqueous polymer dispersion obtained by free-radical polymerization of a monomer mixture containing from 70 to 100% by weight of vinyl chloride or vinylidene chloride or a mixture thereof, which contains at least one added starch-degradation product which is water-soluble at room temperature and obtained by hydrolysis in the aqueous phase and has a weight average molecular weight M.sub.w of from 2500 to 25000.
An aqueous polymer dispersion obtained by free-radical polymerization of a monomer mixture containing
- from 90 to 99% by weight of esters of acrylic or methacrylic acid with alkanols having 1 to 8 carbon atoms or mixture thereof, or styrene or a mixture thereof, and
- from 1 to 10% by weight of acrylic acid, methacrylic acid or a mixture thereof,
- which contains at least one added starch-degradation product which is water-soluble at room temperature and obtained by hydrolysis in the aqueous phase and has a weight average molecular weight M.sub.w of from 2500 to 25000.
Dependencies are inferred from the claim text.