Stock material or miscellaneous articles – Composite – Of epoxy ether
Patent
1985-11-21
1987-05-26
Hoke, Veronica P.
Stock material or miscellaneous articles
Composite
Of epoxy ether
428413, 528108, 528168, C08G 7902
Patent
active
046685898
ABSTRACT:
Aminophenoxycyclotriphosphazenes such as hexakis(4-aminophenoxy)cyclotriphosphazene and tris(4-aminophenoxy)-tris phenoxyclyclotriphosphazene are used as curing agents for epoxy resins. These 1,2-epoxy resins are selected from di- or polyepoxide-containing organic moieties of the formula (CH.sub.2 --CHO--CH.sub.2).sub.m --W--R--W--(CH.sub.2 CH--CH.sub.2 O).sub.m where R is diphenyldimethylmethane, diphenylmethane, bis(dibromophenyl)dimethylmethane, or ##STR1## W is a nitrogen or oxygen atom; and m is 1 when W is oxygen and 2 when W is nitrogen. The resins are cured thermally in stages at between about 110.degree. to 135.degree. C. for between about 1 and 10 min, then at between about 175.degree. to 185.degree. C. for between about 0.5 to 10 hr and post-cured at between about 215.degree. and 235.degree. C. for between abut 0.1 and 2 hr. These resins are useful for making fire-resistant elevated temperature stable composites, laminates (e.g. graphite fiber or fiberglass), molded parts, and adhesives and structures, usually for aircraft secondary structures and for spacecraft construction.
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Fohlen George M.
Kumar Devendra
Parker John A.
Brekke Darrell G.
Hoke Veronica P.
Manning John R.
Marchant Robert D.
The United States of America as represented by the Administrator
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