Diorganopolysiloxane-azobenzene alternating copolymers and methods for their preparation
CA 1298930 C · Owner: Toray Silicone Company, Limited · Inventors: Suzuki, Toshio; Irie, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel diorganopolysiloxane-azobenzene alternating copolymers composed of repeat units having the formula (1), wherein n has a value greater than or equal to 1; each R1 is independently selected from a group consisting of a hydrogen atom, a monovalent hydrocarbon group and an alkoxy group; each R2 is independently selected from a group consisting of a monovalent hydrocarbon group and an alkoxy group; each R3 is a linking group selected from a group consisting of an oxygen atom C2-C6, alkylene groups, -O(C=O)-, -R4-N(R5)-(C=O)and, -R6-(C=O)-N(R7)-, are described. These copolymers undergo reversible photomediated changes in their viscosity and absorption spectra. Also described are methods for …
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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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.