Polyamide precursor

Details Polyamide precursor Polyamide precursor

1997-11-04

2000-02-15

Hampton-Hightower, P.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528126, 528128, 528170, 528172, 528173, 528176, 528185, 528188, 528220, 528229, 528350, C08G 7310, C08G 6926

Patent

active

060254602

ABSTRACT:
The service life of fiber-reinforced polyimide composites in a high temperature oxidative environment is extended by coating with a polyimide coating precursor solution that is synthesized by reacting an aromatic dianhydride with an aromatic diamine in a non-reactive solvent. The reactive solution is heated to a temperature sufficent to reduce its viscosity prior to its use as a coating. Preferably, a mixture of meta-phenylenediamine and para-phenylenediamine is reacted with biphenyldianhydride in n-methyl pyrrolidinone solvent and thereafter heated to between about 50.degree. C. (122.degree. F.) and 150.degree. C. (302.degree. F.) under nitrogen while stirring for a time sufficient to obtain a polyamic acid polyimide precursor coating solution having a Brookfield viscosity of from about 500 to about 5000 cP and a solids content of from about 5 to about 35 weight percent.

REFERENCES:
patent: 3356648 (1967-12-01), Rogers
patent: 3546152 (1970-12-01), Bolton
patent: 3745149 (1973-07-01), Serafini et al.
patent: 3849226 (1974-11-01), Butz
patent: 3868351 (1975-02-01), Hand et al.
patent: 3959350 (1976-05-01), Rogers
patent: 4189518 (1980-02-01), Peterson
patent: 4244857 (1981-01-01), Serafini et al.
patent: 4336175 (1982-06-01), Gibbs
patent: 4347286 (1982-08-01), Ishizuka et al.
patent: 4378400 (1983-03-01), Makino et al.
patent: 4533574 (1985-08-01), Fryd et al.
patent: 4535115 (1985-08-01), Bakshi et al.
patent: 4543295 (1985-09-01), St. Clair et al.
patent: 4845150 (1989-07-01), Kovak et al.
patent: 4864015 (1989-09-01), Cella et al.
patent: 4865903 (1989-09-01), Adiletta
patent: 4874835 (1989-10-01), Berdahl
patent: 4913759 (1990-04-01), Wright
patent: 4939235 (1990-07-01), Harvey et al.
patent: 4973442 (1990-11-01), Harvey et al.
patent: 4978737 (1990-12-01), Vora
patent: 4980447 (1990-12-01), Khanna
patent: 5013588 (1991-05-01), Lin
patent: 5059273 (1991-10-01), Boyce et al.
patent: 5061784 (1991-10-01), Mueller et al.
patent: 5071948 (1991-12-01), Khanna
patent: 5091505 (1992-02-01), Serafini et al.
patent: 5124199 (1992-06-01), O'Quinn et al.
patent: 5125993 (1992-06-01), Principe
patent: 5132395 (1992-07-01), Serafini et al.
patent: 5137751 (1992-08-01), Burgess et al.
patent: 5149760 (1992-09-01), Serafini et al.
patent: 5149772 (1992-09-01), Serafini et al.
patent: 5166292 (1992-11-01), Pottiger et al.
patent: 5166308 (1992-11-01), Kreuz et al.
patent: 5168011 (1992-12-01), Kovar et al.
patent: 5171828 (1992-12-01), Meterko et al.
patent: 5177180 (1993-01-01), Griffin et al.
patent: 5230937 (1993-07-01), Effenberger et al.
patent: 5286890 (1994-02-01), Dougherty
patent: 5296183 (1994-03-01), Carbone et al.
patent: 5304627 (1994-04-01), Connell et al.
patent: 5338827 (1994-08-01), Serafini et al.
patent: 5360671 (1994-11-01), Harris
patent: 5419927 (1995-05-01), Dietrich
patent: 5432001 (1995-07-01), Serafini et al.
patent: 5461137 (1995-10-01), Serafini et al.
patent: 5461138 (1995-10-01), Serafini et al.
patent: 5486096 (1996-01-01), Hertel et al.
patent: 5543493 (1996-08-01), Park et al.

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