High molecular weight polymers of phenylmaleic anhydride

Details High molecular weight polymers of phenylmaleic anhydride High molecular weight polymers of phenylmaleic anhydride

1975-07-25

1979-04-03

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 304R, 260 328R, 526218, 526228, 526232, 526271, 528496, C08F 404, C08F 434

Patent

active

041478525

ABSTRACT:
Relatively large amounts of initiator and short reaction times produce high molecular weight copolymers of phenylmaleic anhydride with a monomer such as styrene whereas normally these conditions would be expected to produce low molecular weight copolymers. Additionally, it was found that the molar ratio of phenylmaleic anhydride and comonomers such as styrene should be controlled to about 1:3 to 1:6 to obtain the high molecular weight desired. Limited use of inert solvents is possible.

REFERENCES:
patent: 3423355 (1969-01-01), Verdol et al.
patent: 3423373 (1969-01-01), Verdol et al.
patent: 3725360 (1973-04-01), Adams
Polymer Processes, Schildknecht, vol. X, pp. 175 & 176 (1956).

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