High temperature fluorinated polyimides

Details High temperature fluorinated polyimides High temperature fluorinated polyimides

1986-05-27

1988-05-03

Kight, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528352, 528229, 528188, C08G 6926

Patent

active

047421525

ABSTRACT:
High temperature fluorinated polyimides having repeating polymer units of the formula ##STR1## wherein X is aromatic or aliphatic. The polyimides can be made by oxidizing 1-phenyl-1,1-bis (3,4-xylyl)-2,2,2-trifluorethane to form 4,4'(2,2,2-trifluoro-1-phenylethylidene)biphthalic tetra carboxylic acid and dehydrating that to form 4,4'(2,2,2-trifluoro-1-phenyl-ethylidene-biphthalic tetra carboxylic acid dianhydride. The dianhydride is polymerized with a diamine to form a polyamic acid which is further imidized to the polyimide. Alternatively, the dianhydride can be esterified to form a 4,4'(2,2,2-trifluoro-1-phenylethylidene)-biphthalic tetracarboxylic acid dialkylester which is then polymerized with a diamine to form a polyamic acid which can then be imidized to a polyimide.

REFERENCES:
patent: 3310573 (1967-03-01), Coe
patent: 3356648 (1967-12-01), Rogers
patent: 3705870 (1972-12-01), Darmory et al.
patent: 4063984 (1977-12-01), Critchley
patent: 4307024 (1981-12-01), Kray et al.
patent: 4336175 (1982-06-01), Gibbs
patent: 4569988 (1986-02-01), Scola et al.
Paper titled "Synthesis of Multifunctional Triarylfluoreithanes, Condensation of Fluoro Ketones by William D. Kray and Robert W. Rosser; J. Org. Chem., vol. 42, No. 7, 1977, pp. 1186-1189.

Affiliated with

Also associated with

Rating

High temperature fluorinated polyimides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High temperature fluorinated polyimides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High temperature fluorinated polyimides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1507258