Process for preparing resin impregnated substrates for use in pr

Details Process for preparing resin impregnated substrates for use in pr Process for preparing resin impregnated substrates for use in pr

1978-08-03

1979-09-18

Smith, Ronald H.

Coating processes

Electrical product produced

174 685, 427 96, 427386, 427434B, 428413, 428417, B05D 512, B32B 2738

Patent

active

041683315

ABSTRACT:
The preparation of substrates impregnated with epoxy resins and curing agents therefor is improved by employing as the epoxy resin one which has been prepared by reacting a low equivalent weight epoxy resin such as a diglycidyl ether of bisphenol A with a dihydric phenolic compound such as tetrabromo bisphenol A in the presence of a quaternary ammonium hydroxide such as tetramethyl ammonium hydroxide.

REFERENCES:
patent: 3306872 (1967-02-01), Maycock et al.
patent: 3480471 (1969-11-01), Rembold
patent: 3679465 (1972-07-01), Flynn
patent: 3687894 (1972-09-01), Collings et al.
patent: 3738862 (1973-06-01), Klarquist et al.
patent: 3998983 (1976-12-01), Smith
patent: 4075260 (1978-02-01), Tsen et al.

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