US 5,844,046 AGranted

Process for the preparation of olefin polymer

AssigneeMitsui Petrochemical Industries, Ltd.

InventorsMasaaki Ohgizawa, Mamoru Kioka

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Abstract

A process for preparing an olefin polymer comprising the steps of: preparing an olefin polymer I! by polymerizing or copolymerizing an olefin in the presence of an olefin poymerization catalyst comprising a specific solid titanium catalyst component A!, a specific organoaluminum compound catalyst component B! and a specific electron donor catalyst component C!; preparing an olefin polymer II! by polymerizing or copolymerizing an olefin in an polymerizer different from that for the polymerization of the above step in the presence of an olefin poymerization catalyst comprising a specific solid titanium catalyst component A!, a specific organoaluminum compound catalyst component B! and a specific electron donor catalyst component D!; and then allowing the resulting olefin polymer I! and the resulting olefin polymer II! to coexist in one polymerizer to further polymerize or copolymerize an olefin.

Claims8

Dependent claims

A process for preparing an olefin polymer, comprising the steps of:

preparing an olefin polymer (I) by polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst comprising:
(A) a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential components,
(B) an organoaluminum compound catalyst component, and
(C) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (I):
R.sup.1.sub.2 Si(OR.sup.2).sub.2 (I)
wherein
R.sup.1 is an alkyl, cycloalkyl, cycloalkenyl or aryl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a secondary or tertiary carbon atom, and R.sup.2 is a hydrocarbon group;
preparing an olefin polymer (II) by polymerizing or copolymerizing an olefin in a polymerizer different from that for the polymerization of the above step in the presence of an olefin polymerization catalyst comprising:
(A) a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential components,
(B) an organoaluminum compound catalyst component, and
(D) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (II):
R.sup.1.sub.n Si(OR.sup.2).sub.4-n (II)
wherein
n is 1, 2, or 3,
when n is 2, one of R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and the other of R.sup.1 is an aralkyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom,
when n is 1 or 3, R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and
R.sup.2 is a hydrocarbon group;
and
then, polymerizing or copolymerizing an olefin in a polymerizer containing the resulting olefin polymer (I) and the resulting olefin polymer (II).

16 more elements

A process for preparing an olefin polymer comprising the steps of:

polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst comprising:
(A) a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor,
(B) an organoaluminum compound catalyst component, and
(C) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (I):
R.sup.1.sub.2 Si(OR.sup.2).sub.2 (I)
wherein
R.sup.1 is an alkyl, cycloalkyl, cycloalkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a secondary or tertiary carbon atom, and
R.sup.2 is a hydrocarbon group;
and then continuing polymerizing or copolymerizing said olefin with addition of
(D) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (II):
R.sup.1.sub.n Si(OR.sup.2).sub.4-n (II)
wherein
n is 1, 2, or 3,
when n is 2, one of R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and the other of R.sup.1 is an aralkyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom,
when n is 1 or 3, R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and
R.sup.2 is a hydrocarbon group.

13 more elements

A process for preparing an olefin polymer, comprising the steps of:

conducting a first polymerization by polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst comprising:
(A) a solid titanium catalyst component containing magnesium, titanium, halogen and an electron donor as essential components,
(B) an organoaluminum compound catalyst component, and
(D) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (II):
R.sup.1.sub.n Si(OR.sup.2 ).sub.4-n (II)
wherein
n is 1, 2, or 3,
when n is 2, one of R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and the other of R.sup.1 is an aralkyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom,
when n is 1 or 3, R.sup.1 is an alkyl or alkenyl group, which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a primary carbon atom, and
R.sup.2 is a hydrocarbon group;
and
then polymerizing or copolymerizing an olefin in the presence of the product of the first polymerization with addition of
(C) an electron donor catalyst component, which may be the same as or different from the electron donor of component (A), represented by the following formula (I):
R.sup.1.sub.2 Si(OR.sup.2).sub.2 (I)
wherein
R.sup.1 is an alkyl, cycloalkyl, cycloalkenyl or aryl group which may be substituted with substituent groups containing halogen, silicon, oxygen, nitrogen, sulfur, phosphorus or boron, whose carbon atom adjacent to Si is a secondary or tertiary carbon atom, and
R.sup.2 is a hydrocarbon group.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/810,884Filed 5 Mar 1997 · continuation
Priority: JP 4-3256974 Dec 1992
Granted: 1 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

C08F 297/08
Using a catalyst of the coordination type: polymerising mono-olefins
C08F 10/00
Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double
C08F 110/06
Monomers containing three or four carbon atoms: propene
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds