Claims
- 1. A method for producing an ethylene-aromatic vinyl compound copolymer having an aromatic vinyl compound content of from 1 to less than 55% by molar fraction comprising polymerizing ethylene with from 1 to less than 55% by molar fraction of an aromatic vinyl compound in the presence of a catalyst of a transition metal compound of the following formula (3) or (4) and a cocatalyst: wherein each of Ind1 and Ind2 is an unsubstituted or substituted indenyl group, and Ind1 and Ind2 may be the same or different from each other, Y is a carbon, a silicon, a germanium or a boron atom, which has bonds to Ind1 and Ind2 and which also has substituents, wherein the substituents may be the same or different, or may have a cyclic structure, X is hydrogen, a halogen, an alkyl group, an aryl group, a silyl group or an alkoxy group, and M is Zr, Hf or Ti, wherein Ind is an unsubstituted or substituted indenyl group, Cp is an unsubstituted or substituted cyclopentadienyl group, Y is carbon, a silicon, a germanium or a boron atom, which has bonds to Ind and Cp and which also has substituents, wherein the substituents may be the same or different, or may have a cyclic structure, X is hydrogen, a halogen, an alkyl group, an aryl group, a silyl group, or an alkoxy group, and M is Zr, Hf or Ti.
- 2. The method for producing the ethylene-aromatic vinyl compound copolymer according to claim 1, wherein the cocatalyst is an aluminoxane (alumoxane) of the following formula (5) or (6): wherein R is a C1-5 alkyl group, a C6-10 aryl group or a hydrogen, m is an integer of from 2 to 100, wherein each R may be the same or different from one another wherein each R′ is a C1-5 alkyl group, a C6-10 aryl group or hydrogen, and n is an integer of from 2 to 100, wherein each R′ may the same or different from one another.
- 3. The process according to claim 1, wherein the catalyst is of formula (3).
- 4. The process according to claim 1, wherein the catalyst is of formula (4).
- 5. The process according to claim 1, wherein the aromatic vinyl compound is styrene.
- 6. The process according to claim 2, wherein polymerization is carried out at from 0 to 160° C.
- 7. An ethylene-aromatic vinyl compound copolymer produced by the method of claim 1.
- 8. An ethylene-aromatic vinyl compound copolymer produced by the method of claim 1, wherein the aromatic compound is styrene.
- 9. A transparent ethylene-aromatic vinyl compound copolymer produced by the method of claim 1, which has a haze of at most 41.5%.
- 10. The transparent ethylene-aromatic vinyl compound copolymer according to claim 9, wherein the aromatic vinyl compound is styrene.
- 11. A molded product produced by molding the transparent ethylene-aromatic vinyl compound copolymer of claim 9.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-63399 |
Mar 1996 |
JP |
|
8-63400 |
Mar 1996 |
JP |
|
Parent Case Info
This application is a continuation of application Ser. No. 09/514,548, filed on Feb. 28, 2000, which is a divisional of Ser. No. 09/203,488, filed Dec. 2, 1998, now U.S. Pat. No. 6,066,709, which is a continuation of Ser. No. 08/820,082, filed Mar. 19, 1997, now U.S. Pat. No. 5,883,213.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
WO 9400500 |
Jan 1994 |
WO |
WO 9532095 |
Nov 1995 |
WO |
WO 9809999 |
Mar 1998 |
WO |
Non-Patent Literature Citations (4)
Entry |
Stud. Surf. Sci. Catal. pp. 517-529, 1990. |
J. Appl. Polym. Sci., 53, pp. 1453-1460, 1994. |
Derwent Publications, AN 1989-170557, JP 01 113447, May 2, 1989. |
Japanese Unexamined Patent Publication JP-4-130114. |
Continuations (2)
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Number |
Date |
Country |
Parent |
09/514548 |
Feb 2000 |
US |
Child |
09/616077 |
|
US |
Parent |
08/820082 |
Mar 1997 |
US |
Child |
09/203488 |
|
US |