Process for coating a substrate with polyimide

Details Process for coating a substrate with polyimide Process for coating a substrate with polyimide

1983-03-29

1984-08-21

Lusignan, Michael R.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273897, 4284735, 528229, 528353, B05D 302, C08G 6926

Patent

active

044670001

ABSTRACT:
A process for coating a substrate to provide good planarization and good mechanical and thermal stability, the process comprising applying to the substrate an amino-terminated oligomer and an ester, with the oligomer being formed from an aromatic diamine and from an aromatic dianhydride, and the ester being formed from an aromatic tetracarboxylic acid and an alcohol, and by reacting said oligomer and said ester in situ, with the process being characterized in that the ester reacts with an amine group of the oligomer to form a high molecular weight polyamide at a temperature between 40.degree. C. and 140.degree. C., and continues to react to form a cyclic imide.

REFERENCES:
patent: 3347808 (1967-10-01), Lavin et al.
patent: 3565549 (1971-02-01), Lubowitz et al.
patent: 3726834 (1973-04-01), Acle, Jr.
patent: 3745149 (1973-07-01), Serafini et al.
patent: 3998786 (1976-12-01), D'Alelio

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