Polymerizable oligomers based on difunctional butadiene oligomers of high 1,2-butylene content and coatings containing the same
CA 2024730 A1 · Owner: Desoto, Inc. · Inventors: Krajewski, John J.; Zimmerman, John M.; Vandeberg, John T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymerizable ethylenically unsaturated oligomer and liquid coating compositions containing the same are disclosed. These unsaturated oligomers are the oligomeric reaction product of components comprising: (1) a polybutadiene oligomer carrying two reactive groups and lacking significant unsaturation the, oligomer containing at least about 60% by weight of butadiene polymerized in the 1,2 position with the balance of the butadiene polymerized in the 1,4 position and the oligomer being hydrogenated to remove much of the residual unsaturation therefrom, said difunctional oligomer having a number average molecular weight of from about 500 to about 5,000 daltons; and (2) a monofunctional …
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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
- Filed September 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2012.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.