A star block copolymer and a thermoplastic elastomer including plurality of the star block copolymers and a method of making both is taught. The star block copolymers of the present invention include a core component having either a styrene oligomer or -methyl styrene oligomer, wherein arms emanate from the core component and the arms are poly(isobutylene-block-styrene) diblock copolymers.

Provided is a method for producing a butene polymer, comprising: a polymerization step of performing polymerization reaction by contacting a raw material component comprising 20% by mass or more of isobutene with a Lewis acid catalyst; and a distillation step of subjecting a solution to be treated containing a reaction product of the polymerization reaction and a butene oligomer added to the reaction product to distillation treatment to obtain the butene polymer, wherein an amount of the butene oligomer added is 25 parts by mass or larger with respect to 100 parts by mass of the reaction product.

Provided is a method for producing a butene polymer, comprising: a polymerization step of performing polymerization reaction by contacting a raw material component comprising 20% by mass or more of isobutene with a Lewis acid catalyst; and a distillation step of subjecting a solution to be treated containing a reaction product of the polymerization reaction and a butene oligomer added to the reaction product to distillation treatment to obtain the butene polymer, wherein an amount of the butene oligomer added is 25 parts by mass or larger with respect to 100 parts by mass of the reaction product.

A star block copolymer and a thermoplastic elastomer including plurality of the star block copolymers and a method of making both is taught. The star block copolymers of the present invention include a core component having either a styrene oligomer or -methyl styrene oligomer, wherein arms emanate from the core component and the arms are poly(isobutylene-block-styrene) diblock copolymers.

A star block copolymer and a thermoplastic elastomer including plurality of the star block copolymers and a method of making both is taught. The star block copolymers of the present invention include a core component having either a styrene oligomer or -methyl styrene oligomer, wherein arms emanate from the core component and the arms are poly(isobutylene-block-styrene) diblock copolymers.

This invention relates to a hydrogenated hydrocarbon resin and a method of preparing the same, wherein the preparation process is simplified, material supply problems can be solved, and the hydrogenated hydrocarbon resin can be prepared using a catalyst, which is inexpensive, has a low odor and is easy to handle, thereby realizing a yield and a preparation process that enable real-world application thereof. The hydrogenated hydrocarbon resin prepared by the method of the invention has excellent compatibility and a low specific viscosity, and can thus be efficiently used as a tackifier or an adhesive in a variety of fields.

This invention relates to a hydrogenated hydrocarbon resin and a method of preparing the same, wherein the preparation process is simplified, material supply problems can be solved, and the hydrogenated hydrocarbon resin can be prepared using a catalyst, which is inexpensive, has a low odor and is easy to handle, thereby realizing a yield and a preparation process that enable real-world application thereof. The hydrogenated hydrocarbon resin prepared by the method of the invention has excellent compatibility and a low specific viscosity, and can thus be efficiently used as a tackifier or an adhesive in a variety of fields.

This invention relates to a hydrogenated hydrocarbon resin and a method of preparing the same, wherein the preparation process is simplified, material supply problems can be solved, and the hydrogenated hydrocarbon resin can be prepared using a catalyst, which is inexpensive, has a low odor and is easy to handle, thereby realizing a yield and a preparation process that enable real-world application thereof. The hydrogenated hydrocarbon resin prepared by the method of the invention has excellent compatibility and a low specific viscosity, and can thus be efficiently used as a tackifier or an adhesive in a variety of fields.

This invention relates to a hydrogenated hydrocarbon resin and a method of preparing the same, wherein the preparation process is simplified, material supply problems can be solved, and the hydrogenated hydrocarbon resin can be prepared using a catalyst, which is inexpensive, has a low odor and is easy to handle, thereby realizing a yield and a preparation process that enable real-world application thereof. The hydrogenated hydrocarbon resin prepared by the method of the invention has excellent compatibility and a low specific viscosity, and can thus be efficiently used as a tackifier or an adhesive in a variety of fields.

Provided herein are methods for preparing a functionalized polyolefin from an unsaturated polyolefin containing one or more non-aromatic main-chain double bonds and for reducing the size and/or polydispersity index (i.e., increasing the homogeneity) of the unsaturated polyolefin.