Patent ID: 9593175
Date: 2017-03-14
CPC Classifications: C08F

Claim:
1. A solid titanium catalyst component (I) that comprises magnesium, titanium, and a halogen for ethylene polymerization, wherein the catalyst component (I) is obtained by bringing a liquid magnesium compound (A) comprising a magnesium compound, an electron donor (a) having 1 to 5 carbon atoms and an electron donor (b) having 6 to 30 carbon atoms into contact with a liquid titanium compound (C) under the presence of an electron donor (B), wherein bringing the liquid magnesium compound (A) into contact with the liquid titanium compound (C) under the presence of the electron donor (B) is performed by bringing a mixture into contact with the liquid titanium compound (C) wherein the mixture is a liquid obtained by mixing in advance the liquid magnesium compound (A) with the electron donor (B), wherein the electron donor (B) is a mixture of a benzoic acid ester having 8 to 18 carbon atoms and a diether compound represented by the following formula (3): wherein in formula (3), m represents an integer of 1 to 10; R any one of R wherein a molar ratio between the electron donor (b) and a titanium atom each contained in the solid titanium catalyst component (I) is 0.2 to 10.