Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1981-11-16
1984-05-29
Reamer, James H.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562452, 562430, 562427, 562441, 560 36, 560 37, 260544B, 260544P, 260544S, 260544N, C07C10142
Patent
active
044516690
ABSTRACT:
Novel compositions comprising acetylenic polyhemi-amic acid compositions and processes for their preparation are disclosed herein. These new compositions are primarily derivatives of anhydride-terminated aromatic polyimides from which they are prepared by amidation to provide acetylenic amide groups having terminal --C.tbd.CH groups as hemi-amic acid groups or their derivatives. These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation thereby extending greatly the applications for which the aromatic polyimides can be employed. Also included are monomeric compounds containing acetylenic amide groups derived from monomeric tetracarboxylic dianhydrides. These are particularly useful as crosslinking agents.
REFERENCES:
patent: 3897395 (1975-07-01), D'Alelio
patent: 3998786 (1976-12-01), D'Alelio
patent: 4168360 (1979-09-01), D'Alelio
patent: 4168366 (1979-09-01), D'Alelio
D'Alelio Gaetano F.
Waitkus Phillip A.
Monacelli Walter J.
Plastics Engineering Company
Reamer James H.
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