Stock material or miscellaneous articles – Composite
Patent
1999-04-13
2000-09-26
McKane, Joseph
Stock material or miscellaneous articles
Composite
428524, 4284735, 528125, 528128, 528229, 528170, 528353, 548473, 548476, C07D20948, C08G 802, C08G 7310
Patent
active
061240354
ABSTRACT:
High temperature resins containing phenylethynyl groups that are processable by transfer molding have been prepared. These phenylethynyl containing oligomers were prepared from aromatic diamines containing phenylethynyl groups and various ratios of phthalic anhydride and 4-phenylethynlphthalic anhydride in glacial acetic acid to form a mixture of imide compounds in one step. This synthetic approach is advantageous since the products are a mixture of compounds and consequently exhibit a relatively low melting temperature. In addition, these materials exhibit low melt viscosities which are stable for several hours at 210-275.degree. C., and since the thermal reaction of the phenylethynyl group does not occur to any appreciable extent at temperatures below 300.degree. C., these materials have a broad processing window. Upon thermal cure at .about.300-350.degree. C., the phenylethynyl groups react to provide a crosslinked resin system. These new materials exhibit excellent properties and are potentially useful as adhesives, coatings, films, moldings and composite matrices.
REFERENCES:
patent: 5412066 (1995-05-01), Hergenrother et al.
patent: 5606014 (1997-02-01), Connell et al.
Connell John W.
Hergenrother Paul M.
Smith, Jr. Joseph G.
Hawkins Hillary W.
McKane Joseph
Oswecki Jane C.
The United States of America as represented by the Administrator
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