Co-oligomerization product of a mixed cyanate and a polymaleimid

Details Co-oligomerization product of a mixed cyanate and a polymaleimid Co-oligomerization product of a mixed cyanate and a polymaleimid

1986-12-08

1988-03-15

Anderson, Harold D.

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

Synthetic resins

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

525404, 525408, 525419, 525523, 525529, 525533, 525534, 525539, 525540, C08G 6948

Patent

active

047314206

ABSTRACT:
Hydroxyaromatic oligomers are prepared by (I) reacting (A) an aromatic hydroxyl-containing material such as bisphenol A with (B) a cyanogen halide such as cyanogen bromide in the presence of a base such as triethylamine and (II) co-oligomerizing the cyanate-containing product from (I) with (C) a polymaleimide such as the reaction product of maleic anhydride with methylenedianiline optionally in the presence of (D) a co-oligomerization catalyst such as cobalt naphthenate. These oligomers are useful in the preparation of epoxy resins.

REFERENCES:
patent: 4663398 (1987-05-01), Hefner

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