Thermoplastic copolymers of polysiloxane polycarbonate and polyester constituents
CA 1055641 A · Owner: Baxter Travenol Laboratories · Inventors: Laurin, Dean G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inventor: Dean G. Laurin, ABSTRACT OF THE DISCLOSURE There is disclosed thermoplastic silicone copolymers having polyarylacarbonate and polyarylester constituents covalently bound to a polydiorganosiloxane constituent. The copolymer is produced by reacting a dihydric phenol with a difunctional polydiorgano siloxane, an organo-diacid halide or with alkyl or aryl ester of an organo-diacid with phos-, gene or other suitable carbonate precursors. The reactions are carried out in suitable organic solvents that solubilize the reagents and the resultant copolumer in the presence of, conventional catalysts. In another embodiment a solvent system is eliminated and the condensation polymerization is …
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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 May 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.