Olefin polymerization catalyst

• US 20050032991A1
• Filed: 07/21/2004
• Published: 02/10/2005
• Est. Priority Date: 07/28/2003
• Status: Active Grant

• Current Assignee: TOHO Titanium Company Limited (ENEOS Holdings, Inc.)
• Original Assignee: Toho Catalyst Co., Ltd. (ENEOS Holdings, Inc.), UBE Industries Limited (UBE Corporation)
• Inventors: Sato, Hiroshi, Yoshikiyo, Motozo, Tashino, Kunihiko, Chosa, Satoru
• Granted Patent: US 6,984,600 B2
• Time in Patent Office: Days
• US Class Current: 526/125.300
• CPC Class Codes: C08F 10/00 Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 110/06 Propene
• CPC Class Codes: C08F 2500/12 Melt flow index or melt flow ratio
• CPC Class Codes: C08F 2500/17 Viscosity
• CPC Class Codes: C08F 4/651 Pretreating with non-metals or metal-free compounds
• CPC Class Codes: C08F 4/6548 magnesium or compounds thereof, not provided for in C08F4/6543 or C08F4/6546
• CPC Class Codes: C08F 4/6565 and magnesium or compounds thereof

Abstract

An olefin polymerization catalyst comprising: (A1) a solid catalyst component prepared by contacting (a1) a dialkoxymagnesium, (b1) a tetravalent titanium halide, (c1) an electron compound, and (d1) a polysiloxane, (B) an organoaluminum compound of the formula R¹_pAlQ_3-p, and (C) an aminosilane compound of the formula (R²R³N)Si (OR⁴)₃ has a high activity to hydrogen as compared with conventional catalysts and maintains the capability of producing polymers with a high stereoregularity at a high yield.

Claims

1. An olefin polymerization catalyst comprising the following components (A1), (B), and (C):

(A1) a solid catalyst component prepared by contacting (a1) a dialkoxymagnesium, (b1) a tetravalent titanium halide, (c1) an electron donor compound, and (d1) a polysiloxane,

(B) an organoaluminum compound of the following formula (1),

R¹_pAlQ_3-p 

 

(1)

wherein R¹ represents an alkyl group having 1-4 carbon atoms, Q represents a hydrogen atom or a halogen atom, and p represents a real number satisfying the formula 0<

p≦

3, and

(C) an aminosilane compound of the following formula (2),

(R²R³N) Si (OR⁴)₃ 

 

(2)

wherein R² represents a linear or branched alkyl group having 1-12 carbon atoms or a hydrogen atom, R³ represents a linear or branched alkyl group having 1-12 carbon atoms which may be either the same as or different from R², and R⁴ represents a linear or branched alkyl group having 1-4 carbon atoms.

2. The catalyst for olefin polymerization according to claim 1, wherein the solid catalyst component (A1) is prepared by contacting (a1) a dialkoxymagnesium, (b1) a tetravalent titanium halide, (c1) an electron donor compound, (d1) a polysiloxane, and (e1) an aromatic hydrocarbon.

3. The catalyst for olefin polymerization according to claim 1, wherein the dialkoxymagnesium (a1) is diethoxymagnesium.

4. The catalyst for olefin polymerization according to claim 1, wherein the electron donor compound (c1) is a phthalic acid diester.

5. The catalyst for olefin polymerization according to claim 1, wherein the electron donor compound (c1) is a phthalic acid diester derivative.

6. The catalyst for olefin polymerization according to claim 5, wherein the phthalic acid diester derivative is a 4-bromophthalic acid diester.

7. An olefin polymerization catalyst comprising the following components (A2), (B), and (C):

(A2) a solid catalyst component prepared by contacting (a1) a dialkoxymagnesium, (b1) a tetravalent titanium halide, and (c2) a phthalic acid diester derivative,

(B) an organoaluminum compound of the following formula (1),

R¹_pAlQ_3-p 

 

(1)

wherein R¹ represents an alkyl group having 1-4 carbon atoms, Q represents a hydrogen atom or a halogen atom, and p represents a real number satisfying the formula 0<

p≦

-3, and

(C) an aminosilane compound of the following formula (2),

(R²R³N) Si (OR⁴)₃ 

 

(2)

wherein R² represents a linear or branched alkyl group having 1-12 carbon atoms or a hydrogen atom, R³ represents a linear or branched alkyl group having 1-12 carbon atoms which may be either the same as or different from R², and R⁴ represents a linear or branched alkyl group having 1-4 carbon atoms.

8. The catalyst for olefin polymerization according to claim 7, wherein the solid catalyst component (A2) is prepared by contacting (a1) a dialkoxymagnesium, (b1) a tetravalent titanium halide, (c2) a phthalic acid diester derivative, and (e1) an aromatic hydrocarbon.

9. The catalyst for olefin polymerization according to claim 7, wherein the dialkoxymagnesium (a1) is diethoxymagnesium.

10. The catalyst for olefin polymerization according to claim 7, wherein the phthalic acid diester derivative is a 4-bromophthalic acid diester.