Title:
【発明の名称】プロピレン重合体組成物
Document Type and Number:
Japanese Patent JPH04209641
Kind Code:
A
Abstract:
PURPOSE:To prevent fish eyes from occurring and improve appearance and transparency by mixing a specific propylene polymer contg. a 3-methyl-1-butene polymer with a propylene polymer. CONSTITUTION:10-200g of 3-methyl-1-butene is prepolymerized at 0-90 deg.C in the presence of a solid titanium catalyst component (e.g. TiCl3) to give a prepolymerized catalyst. A mixture comprising 100 pts.wt. propylene and 0-20 pts.wt. 2-12C alpha-olefin is polymerized at 0-90 deg.C in the presence of this catalyst under the normal to 50kg/cm<2> pressure to such a conversion that at least 200g of the mixture is polymerized per g of the solid titanium catalyst component, giving a propylene polymer contg. a 3-methyl-1-butene polymer wherein the wt. ratio of the propylene polymer or propylene-alpha-olefin copolymer to the 3- methyl-1-butene polymer is 40 or higher. A wt.% of 0.01-5wt.% of the polymer contg. the 3-methyl-1-butene polymer is compounded with 99.99-95wt.% propylene polymer or propylene-alpha-olefin copolymer.
Inventors:
UEHARA YUMITO
KATO HIDETO
KATO HIDETO
Application Number:
JP40009090A
Publication Date:
July 31, 1992
Filing Date:
December 01, 1990
Export Citation:
Assignee:
MITSUBISHI CHEM IND
International Classes:
C08L23/10; C08F2/00; C08F4/60; C08F4/651; C08F10/00; C08F210/06; C08L23/18; (IPC1-7): C08L23/10; C08F2/00; C08F4/651; C08F210/06
Attorney, Agent or Firm:
Hasegawa Hajime (1 person outside)