Claims
- 1. A styrenic copolymer which comprises structural unit (I) represented by the formula (I) ##STR21## wherein R.sup.1 is at least one of a hydrogen atom, halogen atom or substitutent having at least one member selected from a carbon atom, tin atom and silicon atom; m is an integer from 1 to 5: and when m is a plural, R.sup.1 may be the same or different, and a structural unit (II) represented by the formula (II) ##STR22## wherein R.sup.2 is a hydrogen atom, halogen atom, cyano group or hydrocarbon residue having 1 to 20 carbon atoms; n is an integer from 0 to 20; R.sup.3 is a substitutent having at least one member selected from ##STR23## and a metal, or a hydrogen atom; and when R.sup.3 is a hydrogen atom, n is an integer from 1 to 20, said styrenic copolymer being characterized in that said structural unit (II) is contained in an amount of 0.01 to 99,9 mol %, the intrinsic viscosity of said copolymer as measured in 1,2,4trichlorobenzene at 135.degree. C. ranges from 0.01 to 20 dl/g and the stereoregularity of the main chain of said structural unit (I) has a high degree of syndiotactic configuration, which comprises polymerizing a styrenic monomer represented by the formula (III) ##STR24## wherein R.sup.1 and m are each as previously defined, in the presence of a catalyst comprising a transition metal compound and an aluminoxane, thereafter adding to said polymer a comonomer represented by the formula (IV) ##STR25## wherein n, R.sup.2 and R.sup.3 are each as previously defined to proceed with copolymerization.
- 2. The process according to claim 1, wherein the transition metal compound is selected from the group consisting of ##STR26## wherein R.sup.4 to R.sup.15 are each a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms, alkoxyl group having 1 to 20 carbon atoms, aryl group having 6 to 20 carbon atoms, arylalkyl group having 7 to 20 carbon atoms, aryloxy group having 6 to 20 carbon atoms, acyloxy group having 1 to 20 carbon atoms, acetylacetonyl group, cyclopentadienyl group, substituted cyclopentadienyl group or indenyl group;
- a, b and c are each an integer from 0 to 4, satisfying the relation 0.ltoreq.a+b+c.ltoreq.4; d and e are each an integer from 0 to 3, satisfying the relation 0.ltoreq.d+e.ltoreq.3; f is an integer from 0 to 2, satisfying the relation 0.ltoreq.f.ltoreq.2; g and h are each an integer from 0 to 3, satisfying the relation 0.ltoreq.g+h.ltoreq.3; M.sup.1 and M.sup.2 are each a titanium atom, zirconium atom, hafnium atom or vanadium atom; and M.sup.3 and M.sup.4 are each a vanadium atom.
- 3. The process according to claim 1, wherein the transition metal compound comprises titanium in the form of an alkoxide or titanium having a substituted .pi. electron containing ligand.
- 4. The process according to claim 1, wherein the transition metal compound comprises a titanium compound having a ligand selected from the group consisting of cyclopentadienyl and halogen.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2-314327 |
Nov 1990 |
JPX |
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3-089509 |
Mar 1991 |
JPX |
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Parent Case Info
This application is a Continuation of application Ser. No. 07/890,851, filed Jul. 10, 1992, now abandoned which was filed as International Application No. PCT/JP91/01580 on Nov. 19, 1991.
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Date |
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5250629 |
Tani et al. |
Oct 1993 |
|
5262504 |
Tazaki et al. |
Nov 1993 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
890581 |
Jul 1992 |
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