Patent ID: 6930152
Filing Date: 2005-08-16
Classification: C08L

Abstract:
1. A propylene polymer composition which is the product obtained by the process comprising: polymerizing propylene or copolymerizing propylene and at least one olefin selected from the group consisting of ethylene and α-olefins of 4 to 20 carbon atoms in the presence of an olefin polymerization catalyst comprising (i) a transition metal compound (h) represented by the following formula: wherein M is zirconium; R R X Y is a divalent silicon-containing group selected from the group consisting of dialkylsilylene, alkylarylsilylene and diarylsilylene; and (ii) at least one compound selected from the group consisting of an organoaluminum oxy-compound, and a compound which reacts with the transition metal compound (h) to form an ion pair, to prepare a propylene homo- or co-polymer (A); polymerizing or copolymerizing at least one monomer selected from the group consisting of olefins of 2 to 20 carbon atoms and polyenes of 5 to 20 carbon atoms in the presence of an olefin polymerization catalyst which may be the same or different from the aforementioned olefin polymerization catalyst to prepare an olefin elastomer (D) which contains constituent units derived from ethylene, propylene, butene or 4-methyl-1-pentene in an amount of less than 90% by mol, and has a glass transition temperature (Tg) of not higher than 10° C.; polymerizing one monomer selected from the group consisting of ethylene, butene and 4-methyl-1-pentene or copolymerizing said one monomer with at least one additional monomer selected from the group consisting of olefins of 2 to 20 carbon atoms other than said one monomer and polyenes of 5 to 20 carbon atoms, in the presence of an olefin polymerization catalyst which may be the same or different from the aforementioned olefin polymerization catalyst to prepare an olefin elastomer (D) which constituent units derive from ethylene, propylene, butene or 4-methyl-1-pentene in an amount of less than 90% by mol, and has a glass transition temperature (Tg) of not higher than 10° C.; polymerizing one monomer selected from the group consisting of ethylene, butene and 4-methyl-1-pentene or copolymerizing said one monomer with at least one additional monomer selected from the group consisting of olefins of 2 to 20 carbon atoms other than said one monomer and polyenes of 5 to 20 carbon atoms, in the presence of an olefin polymerization catalyst which may be the same as or different from the aforementioned olefin polymerization catalyst to prepare an olefin polymer (E) which contains constituent units derived from said one monomer in an amount of not less than 90% by mol; and mixing 5 to 95% by weight of the propylene homo- or co-polymer (A), not more than 95% by weight of the olefin elastomer (D), and not more than 95% by weight of the olefin polymer (E).