Process for the preparation of polyvinyl butyral having improved

Details Process for the preparation of polyvinyl butyral having improved Process for the preparation of polyvinyl butyral having improved

1986-03-10

1987-09-29

Schofer, Joseph L.

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

Synthetic resins

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

C08F 800

Patent

active

046969713

ABSTRACT:
A process for the preparation of a polyvinyl butyral having improved properties comprises subjecting a polyvinyl alcohol in an aqueous medium in the presence of butyraldehyde and an acid catalyst and sodium dioctyl sulfosuccinate (DOS), effective as an emulsifier, neutralizing the reaction mixture to a pH of 5, and thereafter recovering the polyvinyl butyral by separating it from the reaction liquors and thoroughly washing it with water.

REFERENCES:
patent: 2345946 (1942-02-01), Overbaugh
patent: 2668803 (1950-09-01), Lantz et al.
patent: 2915504 (1959-12-01), Berardinelli
patent: 3153009 (1964-10-01), Rombach
patent: 4205146 (1980-05-01), Hermann et al.

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