Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1978-05-02
1980-06-17
Ives, P. C.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
428383, 428384, 428389, 428458, 428463, 427116, 427118, 427120, 260 292N, 174120C, 174120SR, D02G 300, H01B 344
Patent
active
042084644
ABSTRACT:
A coated article comprising a metal support and a baked layer of a water soluble heat-resistant insulating varnish containing a resin comprising ester groups and imide rings in the molecule dissolved in water using a volatilizable basic compound, the resin comprising the reaction product of
(A) a carboxyl-containing polyesterimide resin having an acid value of about 30 to 150 obtained by reacting (a) a polyhydric alcohol component comprising at least one organic polyhydric alcohol and containing about 10 to 60 mol % of an imide ring-containing glycol of the general formula (I): ##STR1## wherein R.sub.1 is a trivalent aromatic group, R.sub.2 is a divalent organic group, and n is an integer of 1 to 3, with (b) a polycarboxylic acid component comprising at least one trivalent or divalent organic carboxylic acid or the anhydride thereof, where about 30 to 100 mol % of which comprises an aromatic tricarboxylic acid or the anhydride thereof so that the equivalent ratio (OH/COOH) between the polyhydric alcohol component and the polycarboxylic acid component is about 1.0 to 2.0;
(B) 1,2,3,4-butanetetracarboxylic acid or an imide-forming derivative thereof; and
(C) an organic diamine.
REFERENCES:
patent: 3306771 (1967-02-01), Schmidt et al.
patent: 3906139 (1975-09-01), Hiroaka et al.
patent: 3952084 (1976-04-01), Edelman et al.
patent: 4070524 (1978-01-01), Keske
patent: 4116941 (1978-09-01), Hanson
Ishizuka Takashi
Miwa Naoki
Ives P. C.
Nitto Electric Industrial Co. Ltd.
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