Crosslinking of (meth)acryloxyalkenylene functional siloxane prepolymers
CA 2014064 C · Owner: Jacobine, Anthony F. · Inventors: Jacobine, Anthony F.; Nakos, Steven T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition cureable to a solid crosslinked polyorganosiloxane comprises:, (a) an acrylic functional silicon prepolymer having a plurality of acrylic groups of the formula: (see above formula ), bound to silicon atoms thereof where R is H or methyl, and , R1 is a divalent olefinically unsaturated hydrocarbon group (b) a silicone prepolymer having a plurality of organothiol groups thereon, and, (c) an effective amount of a thiolene cure catalyst. Particularly preferred formulations are photoinitiated formulations employing alkylthiol functional silicones in which the total number of thiol groups is between 0.5 and 1.5 times the total number of 'ene groups counting both the acrylic …
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
- Filed April 6, 1990 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2012.
- 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.