Solid catalyst component for polymerization comprising ti, mg, halide, and an ester of a polyol
CA 2476273 C · Owner: Li, Tianyi · Inventors: Liu, Haitao; Li, Zhulan; Wang, Jun
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a solid catalyst component for the polymerization of olefins, comprising magnesium titanium, a halogen and an , electron donor wherein said electron donor comprises at least one selected from the group consisting of polyol ester compounds of the formula (I): R~1CO- O-CR~3R~4-A-CR~5R~6-O-CO-R~2 (I) wherein R~1 and R~2 groups, which may be , identical or different can be substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R~3-R~6 groups, which may be identical or different can , be selected from the group consisting of hydrogen halogen or substituted or , unsubstituted hydrocarbyl having 1 to 20 carbon atoms R~1-R~6 groups , optionally …
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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 January 30, 2003 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.