Methods and compositions for producing polyimide coatings

Details Methods and compositions for producing polyimide coatings Methods and compositions for producing polyimide coatings

1985-06-20

1989-06-27

Kendell, Lorraine T.

Stock material or miscellaneous articles

Composite

Of polyimide

4272071, 428335, B32B 2700, B05D 510

Patent

active

048429481

ABSTRACT:
Methods and compositions for producing imide precursors and polyimide coating and adhesives. Basically a mixture of an oxoimine such as caprolactam, a dianhydride such as 3,3', 4,4'-benzophenone tetracarboxylic acid dianhydride and a solvent such as dimethyl formamide is heated to a temperature of about 60.degree. to 120.degree. C. for a suitable period, then the mixture is cooled and a suitable diamine is added to produce the imide precursor. This mixture may be dried to a powder form or may be used directly as a coating or adhesive. The final polyimide is produced by heating the precursor to a suitable temperature over an appropriate period.

REFERENCES:
patent: 4161477 (1979-07-01), Long et al.
patent: 4183838 (1980-01-01), Gagliani
patent: 4183839 (1980-01-01), Gagliani
patent: 4442283 (1984-04-01), Gagliani et al.

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