Copolymer production process

Details Copolymer production process Copolymer production process

1994-11-14

1996-08-20

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...

5253294, 5263031, 526306, 5263078, 52631825, 5263183, 528335, 528336, 528345, C08F 2008

Patent

active

055480314

ABSTRACT:
A process for producing a copolymer having succinimide units represented by general formula (I) is provided which comprises reaction of a copolymer constituted of 40-60 mole % of maleic anhydride units, 60-40 mole % of olefin units, and 0-20 mole % of another copolymerizable monomer units with an amine to convert the maleic anhydride units to the succinimide units, wherein the succinimide units are formed by ring-closing imidation in a slurry state in a poor solvent: ##STR1## where R.sub.1 is a hydrogen atom, or an alkyl or cycloalkyl group of 1 to 6 carbons. The copolymer has low yellowness and high transparency.

REFERENCES:
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patent: 4481319 (1984-11-01), Sackmann et al.
patent: 4588786 (1986-05-01), Kadono et al.
patent: 4933395 (1990-06-01), Canova et al.
patent: 5064922 (1991-11-01), Wamprecht et al.
patent: 5223582 (1993-06-01), Blum et al.
patent: 5356550 (1994-10-01), Cook et al.
Patent Abstracts of Japan vol. 9, No. 45 (C-268) (1768) Feb. 26, 1985.

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