Reaction products of imidazole on pyrazole derivatives and 4-iso

Details Reaction products of imidazole on pyrazole derivatives and 4-iso Reaction products of imidazole on pyrazole derivatives and 4-iso

1990-01-16

1991-01-01

Shen, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544224, 544238, 544242, 544295, 544357, 544410, 548335, 548336, 548546, C07D207456, C07D23396

Patent

active

049819780

ABSTRACT:
Thermosettable prepolymers or resins are prepared by reacting (1) a pyrazine compound containing at least two substituent groups which have a hydrogen atom attached to a carbon atom which is attached to the ring such as tetramethylpyrazine, (2) a material containing at least two aromatic aldehyde groups, and (3) at least one of (a) a nitrogen containing aromatic heterocyclic compound containing at least one hydrogen atom attached to a carbon atom attached to the ring and a polymerizable unsaturated group such as 2-methyl-5-vinylpyridine or (b) an aldehyde containing at least one polymerizable unsaturated group such as 4-isopropenyl-1-cyclohexene-1-carboxaldehyde. These prepolymers or resins are curable to thermoset products having good mechanical and thermal properties by heat and pressure or by homopolymerization or copolymerization with N,N'-bis-imides such as 1,1'-(methylenedi-4,1-phenylene)-bismaleimide. The prepolymers are suitable for preparing composites.

REFERENCES:
patent: 4629770 (1986-12-01), Treybig
patent: 4724003 (1988-02-01), Treybig et al.
patent: 4740320 (1988-04-01), Treybig et al.
patent: 4755600 (1988-07-01), Treybig
patent: 4761473 (1988-08-01), Treybig et al.
patent: 4831137 (1989-05-01), Treybig et al.
patent: 4927932 (1990-05-01), Treybig et al.

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