Use of water-soluble polymers as auxiliary drying agents for...

Details Use of water-soluble polymers as auxiliary drying agents for... Use of water-soluble polymers as auxiliary drying agents for...

2003-05-21

2010-02-02

Wu, David (Department: 1796)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S558000, C524S449000, C524S447000, C523S342000, C523S332000

Reexamination Certificate

active

07655710

ABSTRACT:
The invention relates to the use of water-soluble polymers, consisting of a) monoethylenically unsaturated monomers consisting of acidic groups in an acidic, partially or fully neutralized form and b) other monomers which can be copolymerized with monomers a) as a drying agent for the production of redispersion power and/or powdery polymer dispersing agents. The water-soluble polymers contain at least 20 wt. % monomers (a) and a maximum of 8O wt. % monomers (b) and are supplied to the production process in the form of aqueous solutions in amounts of up to 50 wt. % maximum, enabling powder, polymer products with a residual moisture of <2 wt. % to be obtained, particularly in spray drying processes, and which are added to mineral systems as dispersing agents in amounts of 0.05-5 wt. % or are used as building materials for the mineral binding of redispersion powder in adhesives or as a binders in their own right.

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