Process for preparing pulverulent polymers by drying aqueous pol

Details Process for preparing pulverulent polymers by drying aqueous pol Process for preparing pulverulent polymers by drying aqueous pol

1998-02-12

2000-10-17

Merriam, Andrew E. C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523332, 524522, 524556, 524558, 525221, 528502E, C08J 312

Patent

active

06133345&

ABSTRACT:
The invention provides for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acids and their hydroxyalkyl esters as assistants;
polymer powders obtainable by this process;
aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, and
a polymeric binder as well as and mineral building materials which comprise the novel polymer powders.

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