High char yield benzoxazines

Details High char yield benzoxazines High char yield benzoxazines

1997-10-03

1999-10-26

Raymond, Richard L.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544 63, 544 69, 544 74, 544 90, 544105, C07D26516

Patent

active

059731443

ABSTRACT:
Benzoxazine monomers, oligomers and polymers are desirably modified by adding pendant functional groups to either the amine or phenolic reactants. These pendant functional groups can be activated at temperatures generally from about 25.degree. C. to about 300.degree. C. to form chemical bonds between said benzoxazine monomers, oligomers and polymers. The additional chemical bonds increase the thermal stability of benzoxazine polymers such that they can withstand higher use temperature, act as more effective flame barriers, or result in higher amounts of char if used as a precursor to high temperature (600-1000.degree. C. reaction condition) chars.

REFERENCES:
patent: 5543516 (1996-08-01), Ishada

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