Fire and heat resistant laminating resins based on maleimido sub

Details Fire and heat resistant laminating resins based on maleimido sub Fire and heat resistant laminating resins based on maleimido sub

1985-07-30

1987-01-06

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528168, 528322, 428421, 4284735, 428500, 428704, C08G 7310, C08G 7902

Patent

active

046347593

ABSTRACT:
4-Aminophenoxy cyclotriphosphazenes are reacted with maleic anhydride to produce maleamic acids which are converted to the maleimides. The maleimides are polymerized. By selection of starting materials (e.g. hexakis amino or trisaminophenoxy-trisphenoxy-cyclotriphosphazenes), selection of molar proportions of reactants, use of mixtures of anhydrides and use of dianhydrides as bridging groups a variety of maleimides and polymers are produced. The polymers have high limiting oxygen indices, high char yeilds and other useful heat and fire resistant properties making them useful as, for example, impregnants of fabrics.

REFERENCES:
patent: 4550177 (1985-10-01), Kumar et al.

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