An object of the present disclosure is to provide a method for manufacturing a copolymer, wherein a crystal content and a vinyl bond content (or a glass transition temperature) of the copolymer can be controlled. Specifically, the present disclosure provides a method for manufacturing a copolymer, wherein the method comprises a process of copolymerizing ethylene with isoprene under the presence of a polymerization catalyst composition containing a half metallocene cation complex represented by following general formula (I)

##STR00001##

(In formula (I), M represents a lanthanoid element, scandium or yttrium; Cp.sup.R′ represents substituted cyclopentadienyl, substituted indenyl or substituted fluorenyl; X represents hydrogen atom, halogen atom, alkoxy, thiolate, amide, silyl, or a C.sub.1-20 monovalent hydrocarbon group; L represents a neutral Lewis base; w represents an integer in the range of 0 to 3; and [B].sup.− represents a non-coordinating anion), wherein Cp.sup.R′ in general formula (I) has at least two substituent groups.

The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.

The present disclosure relates to amido-benzoquinone transition metal complexes, catalyst systems including amido-benzoquinone transition metal complexes, and polymerization processes to produce polyolefin polymers such as polyethylene-based polymers and polypropylene-based polymers.

The present invention is directed to a copolymer of a monomer selected from the group consisting of 1,3-butadiene and isoprene, and a monomer of formula I ##STR00001##
wherein R.sup.1 is phenylene, or a linear or branched alkane diyl group containing 2 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; R.sup.2 and R.sup.3 are independently phenyl or a linear or branched alkyl group containing 1 to 10 carbon atoms, or one of R.sup.2 and R.sup.3 is hydrogen and the other is phenyl or a linear or branched alkyl group containing 1 to 10 carbon atoms, or R.sup.2 and R.sup.3 taken together with the nitrogen atom represent a nitrogen containing heterocyclic group containing from 4 to 12 carbon atoms; and R.sup.4 is hydrogen or a linear or branched alkyl group containing 1 to 10 carbon atoms. The invention is further directed to a rubber composition including the copolymer, and a pneumatic tire containing the rubber composition. The invention is further directed to a method of making such a copolymer.

The present invention is directed to a copolymer of a first monomer and a second monomer, wherein the first monomer is selected from the group consisting of 1,3-butadiene, isoprene, and styrene; and the second monomer is of formula I or V ##STR00001##
wherein R.sup.1 is a covalent bond, phenylene, a linear or branched alkane diyl group containing 1 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; R.sup.2 and R.sup.3 are independently linear or branched alkyl groups containing 1 to 10 carbon atoms; R.sup.4 is hydrogen or a linear or branched alkyl group containing 1 to 10 carbon atoms; and R.sup.5 is a linear or branched alkane diyl group containing 1 to 20 carbon atoms, or a bridging aromatic group. The invention is further directed to a rubber composition including the copolymer, and a pneumatic tire containing the rubber composition. The invention is further directed to a method of making such a copolymer.

The present invention is directed to a copolymer of a monomer selected from the group consisting of 1,3-butadiene and isoprene, and a monomer of formula I ##STR00001##
wherein R.sup.1 is a covalent bond, phenylene, a linear or branched alkane diyl group containing 1 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; and R.sup.2 is hydrogen or a linear or branched alkyl group containing 1 to 10 carbon atoms; and X is a sulfur atom or a structure of formula II or III, wherein when X is of formula III, the S atom of formula III is adjacent to the phenyl ring of formula I and the N atom of formula III is adjacent to R1 ##STR00002##

The present invention is directed to a copolymer of 1,3-butadiene or isoprene and a monomer of formula I or V ##STR00001##
wherein R.sup.1 is a covalent bond, phenylene, a linear or branched alkane diyl group containing 1 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; R.sup.2 and R.sup.3 are independently linear or branched alkyl groups containing 1 to 10 carbon atoms; or R.sup.5 is a linear or branched alkane diyl group containing 1 to 20 carbon atoms, or a bridging aromatic group. The invention is further directed to a rubber composition including the copolymer, and a pneumatic tire containing the rubber composition. The invention is further directed to a method of making such a copolymer.

The present invention is directed to a copolymer of 1,3-butadiene or isoprene and a monomer of formula I or formula II ##STR00001##
where R.sup.1 is a covalent bond or C1 to C8 linear or branched alkanediyl; R.sup.2, R.sup.3, R.sup.4 are independently C1 to C8 linear or branched alkyl or OR.sup.6, where R.sup.6 is C1 to C8 linear or branched alkyl, with the proviso that at least one of R.sup.2, R.sup.3, and R.sup.4 is OR.sup.6, and where R.sup.5 is hydrogen or C1 to C8 linear or branched alkyl. The invention is further directed to a rubber composition including the copolymer, and a pneumatic tire containing the rubber composition. The invention is further directed to a method of making such a copolymer.

An object of the present disclosure is to provide a method for manufacturing a copolymer, wherein a crystal content and a vinyl bond content (or a glass transition temperature) of the copolymer can be controlled. Specifically, the present disclosure provides a method for manufacturing a copolymer, wherein the method comprises a process of copolymerizing ethylene with isoprene under the presence of a polymerization catalyst composition containing a half metallocene cation complex represented by following general formula (I) ##STR00001## (In formula (I), M represents a lanthanoid element, scandium or yttrium; Cp.sup.R represents substituted cyclopentadienyl, substituted indenyl or substituted fluorenyl; X represents hydrogen atom, halogen atom, alkoxy, thiolate, amide, silyl, or a C.sub.1-20 monovalent hydrocarbon group; L represents a neutral Lewis base; w represents an integer in the range of 0 to 3; and [B].sup. represents a non-coordinating anion), wherein Cp.sup.R in general formula (I) has at least two substituent groups.

The present invention is directed to a copolymer of a first monomer and a second monomer, wherein the first monomer is selected from the group consisting of 1,3-butadiene, isoprene, and styrene; and the second monomer is of formula I or V

##STR00001##

wherein R.sup.1 is a covalent bond, phenylene, a linear or branched alkane diyl group containing 1 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; R.sup.2 and R.sup.3 are independently linear or branched alkyl groups containing 1 to 10 carbon atoms; R.sup.4 is hydrogen or a linear or branched alkyl group containing 1 to 10 carbon atoms; and R.sup.5 is a linear or branched alkane diyl group containing 1 to 20 carbon atoms, or a bridging aromatic group. The invention is further directed to a rubber composition including the copolymer, and a pneumatic tire containing the rubber composition. The invention is further directed to a method of making such a copolymer.