Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1982-06-10
1985-03-26
Lee, Lester L.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
549234, C07D30777
Patent
active
045071861
ABSTRACT:
Novel polyimides, copolyimides and molding compositions are prepared from novel dianhydrides such as bicyclo[4.2.0]octane-2,5 diphenyl-7,8-dimethyl,3,4,7,8-tetracarboxylic dianhydride and bicyclo[4.2.0] octane-7,8-dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The novel polyimides are useful as engineering plastics. The novel dianhydrides are useful for the preparation of the polyimides.
REFERENCES:
patent: 2940984 (1960-06-01), Applequist et al.
patent: 3423431 (1969-01-01), Starr et al.
Fields Ellis K.
Nimry Tayseer S.
Blumberg Gunar J.
Lee Lester L.
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
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