Back to results
US 6,855,656 B2Granted
Polymerization and propylene block copolymer
AssigneeToho Catalyst Co., Ltd.
InventorsMotoki Hosaka, Hideo Tsukamoto, Hidetoshi Umebayashi, Makoto Nakano
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeToho Catalyst Co., Ltd.
InventorsMotoki Hosaka, Hideo Tsukamoto, Hidetoshi Umebayashi, Makoto Nakano
Estimating the term…
A propylene block copolymer with a high proportion of ethylene-propylene copolymer particles (rubber component) well dispersed in a propylene polymer exhibiting well-balanced rigidity and impact resistance can be obtained by using a solid catalyst for polymerization of olefins comprising (a) a solid catalyst component with controlled morphology, comprising magnesium, titanium, and a halogen atom, having an average particle diameter, specific surface area, and pore volume in a specific range, and having a pore size distribution in which an cumulative pore volume with a pore size of 100 Å or less is more than 50%, (b) an organoaluminum compound, and (c) an organosilicon compound. The block copolymer is very useful particularly for the application of vehicle parts such as a bumper and parts for household electric appliances.
A solid catalyst component for polymerization of olefins comprising magnesium, titanium, and a halogen atom, having an average particle diameter of 1to 100 μm, a specific surface area of 100 to 500 m2/g, a pore volume of less than 0.3 ml/g, and a pore size distribution in which an cumulative pore volume with a pore diameter of 100 Å or less is more than 80%.
A solid catalyst component for polymerization of olefins comprising magnesium, titanium, and a halogen atom, having an average particle diameter of 1 to 100 μm, a specific surface area of 100 to 500 m2/g, a pore volume of less than 0.3 ml/g, a pore size distribution in which an cumulative pore volume with a pore diameter of 100 Åor less is more than 50%, and the particles consist of small primary particles having the average diameter is 0.01 to 0.1 μm, which aggregate to form secondary particles.
A catalyst for polymerization of olefins comprising:
Dependencies are inferred from the claim text.