Phosphorus-containing imide resins

Details Phosphorus-containing imide resins Phosphorus-containing imide resins

1983-06-09

1985-01-29

Anderson, Harold D.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526274, 528167, 528168, 528170, 528321, 528322, C08F 2070, C08F 3002

Patent

active

044967012

ABSTRACT:
Cured polymers of bis- and tris-imides derived from tris(m-aminophenyl) phosphine oxides by reaction with maleic anhydride or its derivatives, and addition polymers of such imides, including a variant in which a mono-imide is condensed with a dianhydride and the product is treated with a further quantity of maleic anhydride prior to curing are disclosed and claimed. Such polymers are flame resistant. Also disclosed are an improved method of producing tris(m-aminophenyl) phosphine oxides from the nitro analogues by reduction with hydrazine hydrate using palladized charcoal or Raney nickel as the catalyst and fiber-reinforced cured resin composites.

REFERENCES:
patent: 3533996 (1970-10-01), Grundschober et al.
patent: 3767626 (1973-10-01), Laurent et al.
patent: 3878172 (1975-04-01), Bargain et al.

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