C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 110/06 (2006.01) C08F 297/00 (2006.01) C08F 297/08 (2006.01) C08K 5/00 (2006.01) C08L 23/12 (2006.01) C08L 23/14 (2006.01) C08L 53/00 (2006.01) C08F 10/06 (2006.01)
Patent
CA 2100999
Disclosed are a propylene polymer having a high crystallinity of a boiled heptane-insoluble component contained therein, a high stereoregularity and an extremely long mesochain (continuous propylene units wherein directions of .alpha.-methyl carbons are the same as each other), and a process for preparing said polymer. Also disclosed are a propylene block copolymer containing a crystalline polypropylene portion having a high crystallinity of a boiled heptane-insoluble component contained therein, a high stereoregularity and an extremely long mesochain, and a process for preparing said copolymer. Further disclosed is a propylene polymer composition comprising the above propylene polymer or propylene block copolymer and at least one stabilizer selected from a phenol type stabilizer, an organophosphite type stabilizer, a thioether type stabilizer, a hindered amine type stabilizer and a metallic salt of higher aliphatic acid. The propylene polymer of the invention is excellent in rigidity, heat resistance and moisture resistance, and can be favorably used for sheet, film, filament, injection molded product, blow molded product, etc. The propylene block polymer of the invention is well-balanced between rigidity, heat resistance and moisture resistance, and can be favorably used for sheet, filament, injection molded product, blow molded product, etc. The propylene polymer composition of the invention has excellent properties of the propylene polymer or the propylene block copolymer, and moreover is excellent in heat stability during the molding stage, long-term heat stability and weathering resistance. The propylene polymer composition can be favorably used for sheet, film, filament, injection molded product, blow molded product, etc.
Kawakita Kazumitsu
Kioka Mamoru
Shinozaki Tetsunori
Mitsui Chemicals Incorporated
Smart & Biggar
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