Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2005-02-15
2005-02-15
Rabago, Roberto (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S103000, C502S115000, C502S133000, C502S134000, C526S124200, C526S124300, C526S908000
Reexamination Certificate
active
06855656
ABSTRACT:
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.
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Hosaka Motoki
Nakano Makoto
Tsukamoto Hideo
Umebayashi Hidetoshi
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Rabago Roberto
Toho Catalyst Co., Ltd.
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