Polyimidesiloxanes and methods for their preparation and use
CA 1331387 C · Owner: Lee, Chung J. · Inventors: Lee, Chung J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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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 diamine that has the formula I, wherein X is hydrogen, halogen, phenyl or combinations thereof Z = -O-, -S-, , , , - or -Y-Ar-Y- , o, Ar' is an aromatic radical of 6 to 10 carbon atoms (2), , , , , , , , , , Y = -O-, -S-, , or -. n = 0 or 1. Preferably formula I is wherein X, Z, Ar', Y and n are as in formula I. (3) More specifically, the aromatic diamines are diaminoaromatic trifluoride compounds having the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 9, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 9, 2011.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.