Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1989-03-09
1990-12-25
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528128, 528185, 528188, 528191, 528220, 528229, 528320, 528321, 528331, 528353, C08G 7322
Patent
active
049804472
ABSTRACT:
The present invention provides polyamide-polyimide and polybenzoxazole-polyimide polymers derived therefrom with improved processing and film characteristics having incorporated into the polymeric backbone the polymeric condensation residuum of novel aromatic diamino compounds having the formula: ##STR1## wherein A is selected from the group consisting of SO.sub.2, O, S, CO, C.sub.1 to C.sub.6 alkyl, perfluoroalkyl or perfluoroarylalkyl having from 1 to 10 carbon atoms and a carbon-carbon double bond directly linking the two aromatic groups, and R is selected from the group consisting of hydrogen, hydroxy and C.sub.1 to C.sub.4 alkoxy.
The polyamide-polyimide polymers of this invention are prepared by reacting compounds of the above formula, alone or admixed with other aromatic diamines, with one or more aromatic tetarcarboxylic acids or anhydrides thereof. Polybenzoxazole-polyimide derivatives of such polyamide-polyimide polymers are prepared utilizing compounds of the above formula wherein R is hydroxy or C.sub.1 to C.sub.4 alkoxy, and by subjecting the resulting alkoxy or hydroxy-substituted polyamide-polyimide to a dehydrating and cyclizing reaction to form the oxazole linkage which gives rise to polybenzoxazole-polyimide polymer.
REFERENCES:
patent: 4111906 (1978-09-01), Jones et al.
patent: 4847353 (1989-07-01), Watanabe
Anderson Harold D.
Hoechst Celanese Corp.
LandOfFree
Polyamide-polyimide and polybenzoxazole-polyimide polymer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Polyamide-polyimide and polybenzoxazole-polyimide polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamide-polyimide and polybenzoxazole-polyimide polymer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1163755