Process for the production of poly(vinyl acetate) and poly(vinyl

Details Process for the production of poly(vinyl acetate) and poly(vinyl Process for the production of poly(vinyl acetate) and poly(vinyl

1984-11-23

1989-04-11

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...

525 56, 5262181, 526219, 526319, 526330, C08F 800

Patent

active

048207675

ABSTRACT:
This invention relates to a process for the production of poly(vinyl alcohol) having a weight average molecular weight of at least about 0.4.times.10.sup.6 by polymerizing vinyl acetate at a temperature of from about 0.degree. C. to about 40.degree. C. in the presence of an azo free radical polymerization initiator essentially in the absence of ultraviolet radiation to form an essentially linear poly(vinyl acetate) having a weight average molecular weight of at least about 1.0.times.10.sup.6 and thereafter hydrolyzing the poly(vinyl acetate) to form the desired poly(vinyl alcohol).

REFERENCES:
patent: 3109837 (1960-06-01), Lockheed et al.
patent: 4463138 (1984-07-01), Wu et al.
patent: 4485225 (1984-11-01), Satoh et al.

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