Impact-resistant chemically blended propylene polymer composition and process for preparation thereof
CA 1086888 A · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Kato, Akifumi; Yamamoto, Aikich; Furutachi, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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An improved process for preparing an impact-resistant chemically blended propylene polymeror copolymer which comprises, the following three steps: 1) a first step of polymerizing propylene containing 0 to 1 mole% of another another in the presence of a catalyst composed of (a) a carrier-supported titanium catalyst component containing at least magnesium, halogen and titanium on the surface of the carrier and (b) an organoaluminum compound to form specific crystalline polypropylene;, (2) a second step of copolymerizing propylene and ethylene in the presence or the reaction product of the first step and the same catalyst while maintaining the content of propylene in the gaseous phase 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 September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.