Forming polyvinyl butyral

Details Forming polyvinyl butyral Forming polyvinyl butyral

1991-09-09

1993-08-24

Seidleck, James J.

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

Synthetic resins

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

525 61, 525298, 525301, 525154, C08L 2904, C08L 6100, C08K 507, C08F26104

Patent

active

052389944

ABSTRACT:
A process for improving the size distribution of granules formed during synthesis of polyvinyl butyral which involves delaying addition of surfactant to the reaction medium in which the polyvinyl butyral is being formed until after gel break. The surfactant is usually polyacrylic acid or a copolymer of acrylic acid with up to 20 weight percent of one or more copolymerized monomers, in an amount effective to counteract excessive agglomeration of the polyvinyl butyral granules.

REFERENCES:
patent: 2345946 (1944-04-01), Overbaugh
patent: 4205146 (1980-05-01), Hermann et al.
patent: 4533697 (1985-07-01), Degeilh
patent: 4751266 (1988-06-01), Hermann et al.
Research Disclosure, Oct. 1984, No. 24624, p. 497.

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