Carbinol-containing polyimides capable of self-crosslinking at l

Details Carbinol-containing polyimides capable of self-crosslinking at l Carbinol-containing polyimides capable of self-crosslinking at l

1983-09-26

1984-12-18

Lee, Lester L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524600, 525426, 528 26, 528172, 528188, 528189, 528229, 528352, 528353, 548433, 548473, 548476, 548479, C08G 7310

Patent

active

044891857

ABSTRACT:
Novel carbinol-containing polyimides capable of self-crosslinking at low temperatures are prepared by reacting a molar excess of selected 3,3',4,4'-benzhydrol tetracarboxylic acid compounds (the tetraacid, diester-diacid, or (dianhydride) with polyfunctional polyamines (e.g. 4,4'-methylenedianiline, 1,6-hexanediamine, etc.) in an inert organic solvent at about 100.degree.-150.degree. C. The molar ratio of tetracarboxylic acid compound to diamine must be between 2:1 and 9:8. The polyimides may be crosslinked at less than 200.degree. C. via a reaction between the carbinol group(s) and the end group(s) of the polyimide.

REFERENCES:
patent: 3609123 (1971-09-01), Rabilloud et al.
patent: 3793291 (1974-02-01), Cohen et al.
patent: 3933745 (1976-01-01), Bargain et al.
patent: 3939109 (1976-02-01), Barie, Jr. et al.

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