Patent ID: 8742040
Filing Date: 2014-06-03
Classification: C08F

Abstract:
1. A solid titanium catalyst component (I) comprising titanium, magnesium, halogen, a cyclic ester compound (a) represented by the following formula (1) and a cyclic ester compound (b) represented by the following formula (2), wherein the combining molar ratio of the cyclic ester compound (a) to the cyclic ester compound (b) ((cyclic ester compound (a)/(cyclic ester compound (a)+cyclic ester compound (b)))×100 (% by mol)) is 50-90% by mol: wherein n is an integer of 5 to 10, R R plural R are each independently an atom or a group selected from a hydrogen atom, a hydrocarbon group of 1 to 20 carbon atoms, a halogen atom, a nitrogen-containing group, an oxygen-containing group, a phosphorous-containing group, a halogen-containing group and a silicon-containing group, and they may be bonded to one another to from a ring, but at least one R is not a hydrogen atom, and in a skeleton of the ring formed by bonding of plural R to one another may be contained a double bond, and when two or more C wherein n is an integer of 5 to 10, and R