Method for the preparation of layer structures

Details Method for the preparation of layer structures Method for the preparation of layer structures

1975-07-24

1977-08-30

Kimlin, Edward C.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96115P, 96115R, 20415914, G03C 500

Patent

active

040452239

ABSTRACT:
The invention provides a method for the preparation of solvent soluble, highly heat-resistant layered structures, using radiation-sensitive, soluble, preliminary polymers. According to the invention, soluble preliminary polymers are used which are prepared in a hexamethyl phosphoric acid triamide solution and which comprise polycondensation products of primary diamines with bicyclo[2.2.2.]octene-7-tetra carboxylic acid-2,3,5,6-diester-bis-acid chlorides wherein the ester groups are in the orthoposition with respect to the acid chloride groups and contain radiation-reactive radicals. Optionally di-ortho-tetracarboxylic acid-diester-bis-acid chlorides and/or di-ortho-tetracarboxylic acid-bis-anhydrides, carrying radiation-reactive ester radicals, can also be used in addition to the bicyclo[2.2.2.]octene-7-tetra carboxylic acid-2,3,5,6-diester-bis-acid chlorides.

REFERENCES:
patent: 3475176 (1969-10-01), Rauner
patent: 3650746 (1972-03-01), Bailey et al.
patent: 3753720 (1973-08-01), Kloczenski et al.
patent: 3801638 (1974-04-01), Cerwonka
patent: 3847767 (1974-11-01), Kloczewski
patent: 3858510 (1975-11-01), Kai et al.
patent: 3957512 (1976-05-01), Kleeberg et al.

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