Aqueous polyvinyl acetal dispersions

Details Aqueous polyvinyl acetal dispersions Aqueous polyvinyl acetal dispersions

1997-09-25

2000-09-19

Dawson, Robert

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523409, 525 61, 5253303, C08K 320, C08L 6300

Patent

active

061213497

ABSTRACT:
Aqueous dispersions of carboxyl-containing polyvinyl acetals which contain no emulsifiers, no readily volatile organic solvents and no nonvolatile plasticizers, preparable by a) reacting hydroxyl-containing polyvinyl acetals with polycarboxylic anhydrides in the melt or in high-boiling solvents, b) neutralizing at least some of the carboxylic acid groups present in the resulting modified polyvinyl acetals, and c) dispersing the resulting salt of the modified polyvinyl acetals in water, are suitable as coating compositions for paper and textiles and as binders for paints and varnishes.

REFERENCES:
patent: 2532223 (1950-11-01), Bromley, Jr.
patent: 2611755 (1952-09-01), Bromley, Jr.
patent: 4426492 (1984-01-01), Steckler
patent: 4523983 (1985-06-01), Lin
patent: 5559175 (1996-09-01), Kroggel et al.

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