Thermosettable polymers or prepolymers prepared from polymethyla

Details Thermosettable polymers or prepolymers prepared from polymethyla Thermosettable polymers or prepolymers prepared from polymethyla

1984-11-09

1985-09-24

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524 10, 524 12, 524 13, 524 14, 524 33, 524702, 524877, 525417, 525428, 528252, 528270, C08G 1602

Patent

active

045433887

ABSTRACT:
Thermosettable prepolymers or resins are prepared by reacting a pyrazine containing at least two substituent groups which have a hydrogen atom attached to a carbon atom which is attached to the ring with a material containing at least two aromatic aldehyde groups. These prepolymers or resins are curable to thermoset products having good mechanical and thermal properties. Thermoset polymers having good mechanical and thermal properties are also prepared by homopolymerization in the presence of N,N'-bis-imides or copolymerization of these prepolymers with N,N'-bis-imides. The prepolymers are suitable for preparing composites.

REFERENCES:
patent: 3562223 (1971-02-01), Bargain et al.

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