Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1990-08-17
1991-12-31
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 28, 528 38, C08G 7700
Patent
active
050773704
ABSTRACT:
Substantially fully imidized polyimidesiloxanes which are based on a selected pyridine compound are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from the dianhydride, a difunctional siloxane monomer and an organic dimaine that has the formula ##STR1## wherein X is hydrogen, halide, phenyl, or combinations thereof ##STR2## The preferred dimaine has the formula ##STR3## Other diamines can be used to provide an asymmetrical structure in the polyimidesiloxane polymer chain. The polyimidesiloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxane can also be prepared with functional groups which when reacted with an unsaturated compound renders the polymers curable. The products of the invention can be used in the form of solutions in the micro-electronic industry. The polymers can also be used in wire and cable coating and to prepare films, fibers, and molded and extruded articles.
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Bleutge John C.
Fuerle Richard D.
Glass Margaret W.
Occidental Chemical Corporation
Tao James F.
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