Method of producing aqueous polymer dispersions
AssigneeHuels Aktiengesellschaft
InventorsThomas Sauer, Bernhard Stutzel
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Abstract
Method of producing sterically stabilized polymer dispersions by polymerizing ethylenically unsaturated monomers in an aqueous phase (as a dispersion medium) in the presence of an initiator system and a water-soluble macromonomer which is an esterification product of maleic acid, fumaric acid, maleic anhydride, or mixture thereof and polyalkylene glycols and/or monoalkyl ether of polyalkylene glycol, having a degree of esterification between 50% and 100%. The dispersions obtained according to this method possess high electrolyte stability, shear stability, and frost stability, even without addition of conventional emulsifiers and emulsification adjuvants.
Claims8
A method of producing a sterically stabilized polymer dispersion comprising polymerizing ethylenically unsaturated monomers in an aqueous dispersion medium in the presence of
- a water-soluble macromonomer not having surface active properties and
- an initiator system;
- wherein the macromonomer is an esterification product of maleic acid, fumaric acid, maleic anhydride, or mixture thereof and a polyethylene glycol or a C.sub.1-4 alkyl ether of polyethylene glycol, wherein the mean degree of polymerization of the polyethylene glycol is between 5 and 500, having a degree of esterification between 50% and 100%.
Dependencies are inferred from the claim text.