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...
Patent
1985-07-15
1988-06-21
Anderson, Harold D.
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...
524606, 524607, 525419, 525426, 528322, 528335, 528341, 528342, C08L10100, C08G 8300
Patent
active
047526360
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.
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Anderson Harold D.
The Dow Chemical Company
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