Jsr Corporation

Japan Synthetic Rubber Co., Ltd.

Bridgestone Corporation

Other

Eric Inc.

Japan Synthetic Rubber

Etic Inc.

Iwakazu Hattori

Takuo Sone

Tatsuo Fujimaki

Yoichi Ozawa

Koichi Morita

Koji Masaki

H Jerrold Miller

Mitsuhiko Sakakibara

Akio Takashima

Noboru Oshima

Tatsuro Hamada

Tetsuya Omura

Katsutoshi Nonaka

Motokazu Takeuchi

Fumio Tsutsumi

Noboru Shimada

Masashi Shimakage

Toshihiro Tadaki

Hiroshi Akema

Masao Yoshizawa

Takashi Toyoizumi

Satoshi Nakayama

Yasuo Takeuchi

Hisao Ono

Yasumasa Takeuchi

Atsushi Nakayama

Hiroshi Mouri

Ryouji Tanaka

Kouichirou Tani

Tooru Shibata

Hideaki Yokoyama

Kohei Goto

Tamotsu Nagaoka

Kazuo Soga

Hiromi Fukuoka

Yoshitaka Yamakawa

Kazuhisa Kodama

Yoshiro Yagi

Nobuyuki Toyoda

Tetsuyo Omura

Takashi Imamura

Fuji Yamanaka

Shoji Ogasahara

Masahiro Shibata

Yoshiyuki Michino

Takeshi Shiono

Kyouyuu Yasuda

Daisuke Yamazaki

Yoshiki Ishino

Yoshihiro Mori

Hiroyuki Sasanuma

Jerrold H Miller

Tetsuya Ohmura

Studies have been made for the purpose of achieving both the improvement in the storage stability of a solution-polymerized diene rubber that is modified with an alkoxysilane compound and the improvement in the physical properties of the diene rubber when blended with silica. Thus, a production method whereby it becomes possible to produce a modified solution-polymerized diene rubber having good storage stability and high reactivity with silica is developed, by introducing several tens percent of a three blanched or four blanched component that has been coupled with a tin compound into a modified solution-polymerized diene rubber, then coagulating the resultant alkoxysilane modified diene rubber with steam and then drying the coagulated product. In addition, the physical properties of the rubber are further improved successfully by introducing a highly reactive structure to a polymerization initiation terminal of the rubber in the polymerization of the rubber using an alkyl lithium as a polymerization initiator.

Method for producing modified solution-polymerized diene rubber to be blended with silica, and rubber composition containing same

In general the present invention provides a functionalized polymer prepared by a process comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with a functionalizing agent defined by the formula (I)A-R&#x2014;Z&#x2003;&#x2003; (I)where Ris a divalent bond or divalent organic group comprising from 0 to about 20 carbon atoms, A is a substituent that will undergo an addition reaction with a pseudo-living polymer, and Z is a substituent that will react or interact with silica or carbon black reinforcing fillers, with the proviso that A, R, and Z are substituents that will not protonate a pseudo-living polymer.

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In general the present invention provides a functionalized polymer prepared by a process comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with a functionalizing agent defined by the formula (I)A-R&#x2014;Z&#x2003;&#x2003;(I)where Ris a divalent bond or divalent organic group comprising from 0 to about 20 carbon atoms, A is a substituent that will undergo an addition reaction with a pseudo-living polymer, and Z is a substituent that will react or interact with silica or carbon black reinforcing fillers, with the proviso that A, R, and Z are substituents that will not protonate a pseudo-living polymer.

Functionalized high cis-1,4-polybutadiene prepared using novel functionalizing agents

A method for preparing a functionalized polymer comprising the steps of preparing a polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, wherein the lanthanide-based catalyst comprises (a) a lanthanide compound, (b) an alkylating agent, and (c) a source of halogen, and reacting the pseudo-living polymer with at least one amide-containing functionalizing agent.

A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I) where A is a substituent that will undergo an addition reaction with a pseudo-living polymer, Ris a divalent organic group, Ris a monovalent organic group, and each R, which may be the same or different, is a monovalent organic group or a substituent defined by &#x2014;ORwhere Ris a monovalent organic group, with the proviso that A, R, R, R, and Rare substituents that will not protonate a pseudo-living polymer. Also, the functionalized polymer and a vulcanizable composition containing the polymer.

Modified polymers prepared with lanthanide-based catalysts

A functionalized polymer prepared by a process comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with a functionalizing agent defined by the formula (I)A-R-Z&#x2003;&#x2003;(I)where Ris a divalent bond or divalent organic group comprising from 0 to about 20 carbon atoms, A is a substituent that will undergo an addition reaction with a pseudo-living polymer, and Z is a substituent that will react or interact with silica or carbon black reinforcing fillers, with the proviso that A, R, and Z are substituents that will not protonate a pseudo-living polymer.

Conjugated diene polymers having good wear resistance, mechanical properties, storage stability, processability and a reduced cold flow are produced by polymerizing a conjugated diene compound with a catalyst of rare earth element compound, a compound containing at least one halogen atom, an aluminoxane, and an organoaluminum compound in an organic solvent and reacting the resulting polymer just after the polymerization with at least one compound selected from the group consisting of a halogenated organometallic compound, a halogenated metal compound, an organometallic compound, a heterocumulene compound, a hetero three-membered-ring containing compound, a halogenated isocyano compound, a carboxylic acid, an acid halide, an ester compound, a carbonic ester compound, an acid anhydride and a metal salt of a carboxylic acid as a modifying agent.

Method of producing conjugated diene polymers with narrow molecular weight distribution and polymer produced

A method for preparing a functionalized polymer comprising the steps of preparing a pseudo-living polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst, and reacting the pseudo-living polymer with at least one functionalizing agent defined by the formula (I)where A is a substituent that will undergo an addition reaction with a pseudo-living polymer, Ris a divalent organic group, Ris a monovalent organic group, and each R, which may be the same or different, is a monovalent organic group or a substituent defined by &#x2014;ORwhere Ris a monovalent organic group, with the proviso that A, R, R, R, and Rare substituents that will not protonate a pseudo-living polymer. Also, the functionalized polymer and a vulcanizable composition containing the polymer.

An objective of the present invention is to provide a resin composition which gives a molding excellent in flexibility, impact resilience and mechanical properties and a golf ball having the better shot feel, a long carry, and the excellent cutting resistance when used in a golf ball cover. The resin composition of the present invention is characterized in comprising an ionomer resin, an alkoxysilyl group-containing hydrogenated conjugated diene-based polymer and/or an amino group-containing hydrogenated conjugated diene-based polymer. Alkoxysilyl group content and amino group content in the above-mentioned polymers are preferably 0.0001 to 5 mmol/g, respectively. The golf ball of the invention is characterized in that core is covered with a cover material using the above-mentioned resin composition.

Resin composition and golf ball

An objective of the present invention is to provide a hydrogenated modified polymer which can afford a molded body excellent in improvement in the balance among the impact resistance, the strength, the adherability and as the appearance, and a process for producing the same as well as a composition containing the same. Another objective is to provide a composition which can afford a molded body excellent in the balance among the flame retardancy, the tensile strength, the tensile extension, the heat resistance, the characteristic at low temperature, the insulation property, the pliability and the like. The hydrogenated modified polymer of the invention is a hydrogenated polymer of a modified conjugated diene-based polymer obtained by reacting an alkoxysilane compound to a polymer which is polymerized a conjugated diene or a conjugated diene and another monomer using an organic alkali metal compound as a polymerization initiator in an inert organic solvent such as cyclohexane and the like. The hydrogenated modified polymer composition of the invention contains the above-mentioned hydrogenated modified polymer and at least one selected from the group consisting of nonpolar polymer, polar polymer and filler.

Hydrogenated modified polymer, process for producing the same and composition containing the same

A novel modified conjugated diene polymer is obtained by polymerizing a conjugated diene compound with a specified catalyst consisting of components (a)-(c) and then reacting with at least one specified compound selected from the group consisting of components (d)-(l), and has a content of cis-1,4-bond of not less than 85% and a ratio of weight average molecular weight to number average molecular weight of not more than 4. And also, a rubber composition comprises the modified conjugated diene polymer a rubber ingredient.

Modified conjugated diene polymer and method of producing the same and rubber composition

A conjugated diene polymer is produced by continuously polymerizing a conjugated diene monomer with a catalyst consisting essentially of specified components (a) to (c) and reacting with at least one of specified components (d) and (e) and has a content of cis-1,4-bond of not less than 85%, a content of 1,2-vinyl bond of not more than 2.0% and a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) of not more than 5, and contains at least one functional group selected from epoxy group and hydroxyl group in its molecule. And also, a rubber composition comprises 10-200 parts by weight of silica based on 100 parts by weight of rubber ingredient consisting of 10-100% by weight of the above conjugated diene polymer and 90-0% by weight of the other diene polymer or natural rubber.

Conjugated diene polymer and rubber composition

The invention provides a resin composition comprising a polyphenylene ether-based resin and a polyolefin resin, having no interlayer peeling and exhibiting excellent heat resistance and dynamic properties such as impact resistance, rigidity and tensile breaking elongation. The thermoplastic resin composition is characterized in that it comprises (i) a polyphenylene ether-based resin, (ii) a polyolefin resin, and (iii) a hydrogenated block copolymer which consists of block A containing over 50 wt % of a vinyl aromatic compound component and block B containing over 50 wt % of a conjugated diene compound component, the 1,2- and 3,4-vinyl content of the conjugated diene compound component of the copolymer being 60-90%, the content of the bonding vinyl aromatic compound component being 30-70 wt % and at least 85% of the double bonds of the conjugated diene component being hydrogenated; the weight ratio ((i)/(ii)) of the (i) polyphenylene ether-based resin and the (ii) polyolefin resin is in the range of 95/5-5/95; and the (iii) hydrogenated block copolymer is present in the range of 1-50 parts by weight to 100 parts by weight of the total of the (i) polyphenylene ether-based resin and the (ii) polyolefin resin.

Thermoplastic resin composition

A conjugated diene polymer is produced by continuously polymerizing a conjugated diene monomer with a catalyst consisting essentially of components (1): a lanthanoid compound, (2): an aluminoxane and (3): a halogenated organometal compound, a halogenated metal compound or a halogenated organic compound in a hydrocarbon solvent containing 5-50% by weight of an aromatic hydrocarbon to obtain a conjugated diene polymer having a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of not more than 4.

Method of producing conjugated diene polymer

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Tokyo, Japan

Iwakazu Hattori