Preparation of thermosettable polymer or prepolymer from heteroc

Details Preparation of thermosettable polymer or prepolymer from heteroc Preparation of thermosettable polymer or prepolymer from heteroc

1986-03-03

1987-05-26

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528312, 528318, 528322, 528341, 528345, 528351, 528353, C08G 8300

Patent

active

046687661

ABSTRACT:
Thermosettable prepolymers are prepared by reacting (1) an aromatic heterocyclic material having one or more rings and at least one nitrogen atom and at least two reactive substituent groups which have at least one reactive hydrogen atom attached to a carbon atom which is attached to a heterocyclic ring such as 2,3,5,6-tetramethylpyrazine or 2,4,6-trimethylpyridine, (2) a cycloaliphatic or aromatic carboxylic acid cyclic mono- or dianhydride such as pyromellitic dianhydride and (3) a material containing a polymerizable ethylenically unsaturated group and at least one group selected from (a) a heterocyclic material having one or more rings and at least one nitrogen atom and at least one substituent group which has at least one reactive hydrogen atom attached to a carbon atom which is attached to a heterocyclic ring such as 2-methyl-5-vinylpyridine, and (b) a cycloaliphatic or aromatic carboxylic acid cyclic monoanhydride or dianhydride such as cis-5-norbornene-endo-2,3-dicarboxylic anhydride. These prepolymers can be cured or thermosetted by heat and pressure or they can be cured by reaction with a N,N'-bis-imide.

REFERENCES:
patent: 4560742 (1985-12-01), Pater

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