Polymeric material containing reactive epoxide groups and the method of its preparation
CA 1049194 A · Owner: Ceskoslovenska Akademie Ved · Inventors: Svec, Frantisek; Kalal, Jaroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a polymeric material containing epoxide groups which is in the form of spherical particles of diameter up to 3 mm and contains up to 15% of oxirane oxygen in groups of the general formula I:, I wherein R1, R2 and R3 are hydrogen or methyl which are linked, to a polymerized unit of the vinylidene or vinyl type through the carbon or oxygen atom, and copolymerized molecules of a crosslinking agent selected from the group comprising divinylbenzene and monomers of the general formulas II III and IV:, II, III, IV, wherein R1 is hydrogen alkyl containing 1 to 10 carbon atoms, or halogen R2 is alkylene containing 1 to 10 carbon atoms phenylene, or hydroxyalkylene of the …
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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 February 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1996.
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Timeline
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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.