Process for the preparation of olefin polymer
CA 1339239 C · Owner: Funabashi, Hideo · Inventors: Funabashi, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An olefin polymer having stereoregularity is produced by polymerizing an olefin monomer in the presence of a catalyst which comprises (A) a solid catalyst component, (B) an organic aluminum compound and (C) an electron donative compound. The solid catalyst component (A) is obtained by reacting in a, first step, (i) a dialkoxymagnesium compound of the formula Mg(OR1)2 wherein R1 is an alkyl group having 1 to 4 carbon atoms with (ii) an aromatic dicarboxylic acid ester and (iii) a silicon compound of the formula Si(OR2)nX4-n wherein R2 is an alkyl group, a cycloalkyl group or an aryl group X is a, halogen atom, and n is a real number of 0 to 3.0 to, form a solid reaction product; and then …
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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 August 5, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 2014.
- 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.