Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Mica flake
Patent
1977-03-30
1978-09-05
Ansher, Harold
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Mica flake
310208, 427104, 427116, 427386, 428377, 428414, 428454, H02K 104, H02K 330, B32B 2738, B32B 1900
Patent
active
041121830
ABSTRACT:
A highly flexible mica winding tape is made by: (A) mixing epoxide resin with solvent, (B) adding from 0.01 to 5.0 parts per 100 parts epoxide resin of an organo-tin compound, and mixing to form a homogeneous admixture, (C) applying the admixture to a flexible sheet material comprising mica, so that the organo-tin compound contacts the mica, causing the organo-tin compound to act as a latent catalyst, and (D) removing solvent, to form a flexible sheet with substantially unreacted epoxide resin containing an amount of substantially unreacted organo-tin catalyst effective to advance the epoxide in the sheet material from the substantially unreacted state to a cured thermoset state upon heating over a resin-catalyst temperature of 120.degree. C.
REFERENCES:
patent: 2757298 (1956-07-01), Botts et al.
patent: 3226286 (1965-12-01), Scheuer
patent: 3355310 (1967-11-01), Jean et al.
patent: 3983289 (1976-09-01), Nishizaki et al.
patent: 3998983 (1976-12-01), Smith
patent: 4013987 (1977-03-01), Foster
patent: 4020017 (1977-04-01), Smith et al.
Ansher Harold
Cillo D. P.
Westinghouse Electric Corp.
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