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

1986-02-24

1987-05-05

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, 525523, 525529, 525533, 525534, 525539, 525540, 528 96, 528 97, 528 98, 528 99, 528117, 528119, 528120, 528322, C08L 6300, C08G 5906, C08G 7306

Patent

active

046633987

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: 4393188 (1983-07-01), Takahashi et al.
patent: 4487915 (1984-12-01), Hefner, Jr.
patent: 4489202 (1984-12-01), Hefner, Jr.
patent: 4506063 (1985-03-01), Hefner, Jr.
patent: 4555553 (1985-11-01), Hefner, Jr.

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