Polymer composition and a method for producing the same

Details Polymer composition and a method for producing the same Polymer composition and a method for producing the same

2005-06-28

2005-06-28

Seidleck, James J. (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S330200, C525S358000, C525S244000, C525S262000, C523S105000, C523S111000, C523S173000, C526S201000, C526S213000

Reexamination Certificate

active

06911499

ABSTRACT:
The present invention relates to powdered, crosslinked polymer compositions, containinga) 55-99.9 wt.-% of at least one polymerized, ethylenically unsaturated, polymerizable monomer which contains acid groups neutralized to at least 25 mole-%,b) 0-40 wt.-% of polymerized, unsaturated monomers copolymerizable with a),c) 0.01-5.0 wt.-%, preferably 0.1-2.0 wt.-% of one or more crosslinking agents,d) 0-30 wt.-% of a water-soluble polymer,the weight amounts a) through d) being based on anhydrous polymer composition, and the sum of these components always being 100 wt.-%, which compositions can be obtained by continuous polymerization wherein at least one parameter biasing the polymerization is varied according to a recurring pattern. The present invention also relates to a process for their production and to their use.

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