Polyimide precursor composition and application therefrom

Details Polyimide precursor composition and application therefrom Polyimide precursor composition and application therefrom

1990-08-08

1992-04-14

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

4284111, 528315, 528316, 528317, 528318, 528331, C08G 6912, C08G 7312

Patent

active

051049686

ABSTRACT:
Polyimide precursor compositions incorporating at least one compound of fula (1), at least one compound of formula (2), at least one compound of formula (3) and at least one compound of formula (4) ##STR1## in which one of the groups R.sup.3 and R.sup.4 represents a hydrogen atom and the other, in the same way as the groups R.sup.1 and R.sup.2, which can be the same or different, in each case represent a hydrocarbon group having 1 to 16 carbon atoms, m is a number between 5 and 20, n is an integer between 1 and 5 and R.sup.5 represents a hydrogen atom, a halogen atom, a hydrocarbon group with 1 to 16 carbon atoms, or a group of formula R.sup.6 --O-- in which R.sup.6 represents a hydrocarbon group having 1 to 16 carbon atoms. The preferred composition contains 30 to 70% by weight of dry matter of compounds of formulas (1), (2) and (3), in which the groups R.sup.1, R.sup.2 and one of the groups R.sup.3 and R.sup.4 is a methyl or ethyl group and the compound of formula (4) is benzyl alcohol. These compositions are usable as smoothing and/or protective coatings for metals, metal alloys or other substrates and in particular in the electrical and electronic industries, e.g. for the formation of dielectric films.

REFERENCES:
patent: 3609123 (1971-09-01), Rabilloud et al.
patent: 4720539 (1988-01-01), Rabilloud et al.

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