Process for producing styrenic copolymer
AssigneeIdemitsu Kosan Co., Ltd.
InventorsShuji Machida, Toshinori Tazaki
Life of this patent
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Abstract
There are disclosed a styrenic copolymer which comprises at least one structural unit represented by the general formula (I) ##STR1## and a structural unit represented by the general formula (II) ##STR2## or a structural unit represented by the general formula (IX) ##STR3## wherein the symbols are each as previously defined in the specification, the structural unit (II) or (IX) being contained in an amount of 0.01 to 99.9 mol %; and a process for the production of the above copolymer. The above styrenic copolymer has a high degree of syndiotactic configuration in the stereoregularity of the main chain of the structural unit (I) as well as adhesivity and compatibility with a resin of a different type.
Claims4
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.
Dependencies are inferred from the claim text.