Process for preparing acrylate-functional organopolysiloxane-urethane copolymers
CA 1285688 C · Owner: Griswold, Roy M. · Inventors: Vanderlaan, Douglas G.; Griswold, Roy M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A process for preparing radiation polymerizable acrylate-functional organopolysiloxane-urethane copolymers by reacting aminofunctional polysiloxanes having at least one unit of the formula, where R is a divalent radical selected from the group consisting of a saturated divalent hydrocarbon radical having up to 20 carbon atoms, a divalent hydrocarbonoxy radical in which the oxygen atom is in the form of an ether linkage and an unsaturated divalent hydrocarbon radical having from 2 to 20 carbon atoms, R1 is a monovalent hydrocarbon radical having from 1 to 20 carbon atoms R2 is, a radical selected from the group consisting of a monovalent hydrocarbon radical having …
Read the whole patent
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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.