Epoxy-aromatic polysiloxane compositions

Details Epoxy-aromatic polysiloxane compositions Epoxy-aromatic polysiloxane compositions

1989-11-20

1991-09-17

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525484, 525487, 525523, 528 27, C08L 8308, C08L 6300

Patent

active

050496271

ABSTRACT:
A composition comprising a multifunctional glycidyl ether having at least three epoxy groups per molecule with a hardening amount of a mixture of a rigid aromatic diamine and an aromatic diaminopolysiloxane can be thermally cured to a compatible composition. Glycidylamines cannot be used in this composition. Optionally, a diglycidyl ether can be included.
The cured compositions have higher glass transition temperatures than previously observed with epoxy/silicone systems. They also have improved resistance to atomic oxygen over that shown by epoxy formulations lacking a polysiloxane species therein.

REFERENCES:
patent: 3247280 (1966-04-01), Kanner
patent: 3516964 (1970-06-01), Patterson
patent: 3655420 (1972-04-01), Tichenor
patent: 4292110 (1981-09-01), Marteness
patent: 4395527 (1983-07-01), Berger
patent: 4654382 (1987-03-01), Hiza et al.
Advanced Composites, "Composites in Space", L. Leonard, p. 33, Nov.-Dec. 1986, L. Leonard Polymer Preprints, ACS Anaheim CA, 1986, p. 203.
J. Hedrick et al, "Synthesis . . . of Polymers" . . . Office of Naval Research Contract No. N00014-78-C, J. S. Riffle et al. 1983, pp. 1-34.

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