Amphiphilic polyimide precursor and process for preparing the sa

Details Amphiphilic polyimide precursor and process for preparing the sa Amphiphilic polyimide precursor and process for preparing the sa

1989-09-07

1991-01-29

Kight, III., John

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

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528125, 528128, 528172, 528188, 528220, 528229, 528352, 525436, 4284735, C08G 7310

Patent

active

049887955

ABSTRACT:
An amphiphilic polyimide precursor having at least 70% by mole of the recurring unit of the formula (1): ##STR1## wherein R.sup.1 is a tetravalent group having at least 2 carbon atoms, R.sup.2 is a bivalent group having at least 2 carbon atoms, and R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are hydrogen atom or a monovalent group having 1 to 30 carbon atoms selected from an aliphatic group, an alicyclic group, an aromatic group, a group in which an aliphatic group is combined with an alicyclic group or an aromatic group, and their groups substituted by a halogen atom, nitro group, amino group, cyano group, methoxy group or acetoxyl group, provided that at least one, preferably at least two, of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are hydrobolic monomolecular group 12 to 30 carbon atoms, the polyimide precursor being able to form a built-up film on substrates according to the Langmuir-Blodgett technique and being able to be converted into polyimide by heat treatment to provide an ultrathin film of polyimide having a thickness of not more than 10,000 .ANG. and excellent heat resistance, chemical resistance, mechanical property and electric characteristics.

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