Flexible isopropylidene and tetramethyl-containing...

Details Flexible isopropylidene and tetramethyl-containing... Flexible isopropylidene and tetramethyl-containing...

2007-10-16

2007-10-16

Seidleck, James J. (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S162000, C528S168000, C528S124000, C528S123000

Reexamination Certificate

active

10883117

ABSTRACT:
Polyamides and polyimides containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents and their synthetic method are disclosed. Polyamide containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents is synthesized by reacting diamine compound (2,2-bis[4-(2-trifluoromethyl-4-aminophenoxy)-3,5-dimethylphenyl]propane) with an equimolar diacid via a polycondensation reaction. Polyimide containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents is synthesized by reacting diamine compound with an equimolar dianhydride via a polycondensation reaction. The novel polyamide and polyimide containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents are synthesized from the diamine compound containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents, wherein the polyamides and polyimides containing flexible isopropylidene, trifluoromethyl and tetramethyl substituents have appropriate thermal stability, mechanical properties, and processability.

REFERENCES:
patent: 6087470 (2000-07-01), Liaw et al.
Chin-Ping Yang et al Organosoluble and optically transparent polyimides . . . Polymer43 (2002) 5095-5104.
Liaw et al Highly organosoluble . . . Journal of Pol Sci, Part A vol. 42, p. 5766-5774.

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