Method of polymerization
CA 1069107 A · Owner: Goodyear Tire And Rubber Company (The) · Inventors: Kuzma, Leonard J.; Pierson, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of polymerization of butadiene to form polymers with a high (greater than 90 percent) content of cis-1,4 configuration which comprises a process for the polymerization of butadiene under solution polymerization conditions to form a polybutadiene having a high proportion of butadiene units in the cis-1,4-conf?guration comprising contacting butadiene with a catalyst consisting essentially of (1) an organoaluminum compound (A1) selected from the group consisting of triisobutylaluminum and trin-butylaluminum, (2) an organonickel compound (Ni) and, (3) a fluorinated mixture wherein the improvement comprises utilizing a mixture of hydrogen fluoride atherate (HF?Eth) and boron trifluoride …
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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.