Method for varying the melting points and molecular weights of plyolefins using metallocene catalyst systems
CA 1341344 C · Owner: Ewen, John A. · Inventors: Ewen, John A.
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 method for varying the melting points and molecular weights of polyolefins by changing the structure of the catalyst used in the polymerization. The catalysts that are useful in the present invention are chiral stereorigid metallocene catalyst of the formula R"(C5R' m)2MeQ. The catalysts include a bridge structure between the (C5R' m) groups and may contain substituents on the groups. It has been discovered that the melting points and molecular weights of the polymers produced by such catalysts are influenced by the bridge and substituents added to the (C5R' m) groups. Thus, the present invention provides a method for varying the melting points 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 March 5, 2002. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2019.
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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.