Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1989-11-13
1991-03-05
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528 26, 528125, 528128, 528229, 528351, C08G 802, C08G 6926, C08G 6928, C08G 7704
Patent
active
049979086
ABSTRACT:
Disclosed is a substantially fully imidized diglyme-insoluble, N-methylpyrrolidone-soluble polyimidesiloxane which is the reaction product of a dianhydride, about 1 to about 5% by weight of a mono-anhydride, and a mixture of about 20 to about 50% by weight siloxane diamine and about 50 to about 70% by weight non-siloxane diamine. The non-siloxane diamine is a mixture of about 33 to about 50 mole percent of a first diamine having the general formula ##STR1## and about 50 to about 67 mole percent of a second diamine having the general formula ##STR2## were each "X" is independently selected from hydrogen and halogen and each "Y" is independently selected from --CH.sub.2 --, ##STR3## The polyimidesiloxanes are very useful in coating wire, cable, and circuit boards.
REFERENCES:
patent: 3708459 (1973-01-01), Lubowitz
patent: 4321319 (1982-03-01), Shoji et al.
patent: 4395527 (1983-07-01), Berger
patent: 4829131 (1989-05-01), Lee
patent: 4853452 (1989-08-01), Lee
Fuerle Richard D.
Hampton-Hightower P.
Kight III John
Occidental Chemical Corporation
Tao James F.
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