Bridgestone Corporation

Other

Jsr Corporation

Koichi Morita

Yoichi Ozawa

David F Lawson

Takuo Sone

Iwakazu Hattori

Tatsuo Fujimaki

Koji Masaki

H Jerrold Miller

Hajime Kondo

Takashi Kitamura

James E Hall

Xiaorong Wang

Chenchy Jeffrey Lin

James A Krom

Takeshi Kinoshita

Sandra M Warren

Tetsuya Omura

Ryota Fujio

Toshihiro Yotsumoto

Yoshiyuki Kumamoto

Tadashi Shibata

Thomas A Antkowiak

Mark L Stayer

Hideo Takeichi

Atsushi Nakayama

Georg G A Böhm

Mark L Stayer, Jr

Masaaki Izuchi

David Saffles

Tetsuyo Omura

Atushi Nakayama

Tetsuya Ohmura

Jerrold H Miller

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 nano-particle composition including a poly(alkenylbenzene) core and a poly (conjugated diene) or a poly(alkylene) surface layer is provided. The nano-particles have a mean average diameter less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can advantageously be incorporated into rubbers, elastomers, and thermoplastics.

Nano-particle preparation and applications

A nano-particle composition including a poly(alkenylbenzene) core and a poly(conjugated diene), a poly(alkylene), or a poly(alkenylbenzene) surface layer is provided. The nano-particles have a mean average diameter of less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can be advantageously be incorporated into rubbers, elastomers, and thermoplastics.

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 polymer nano-particle composition is provided, wherein the nano-particle includes a poly(alkenylbenzene) core and a surface layer including poly(conjugated diene). A method for self-assembly of the nano-particles is also provided. The polymer nano-particles are preferably less than about 100 nm in diameter.

Self assembly of molecules to form nano-particles

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.

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.

A nano-particle composition including a poly (alkenylbenzene) core and a poly (conjugated diene) or a poly(alkylene) surface layer is provided. The nano-particles have a mean average diameter less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can advantageously be incorporated into rubbers, elastomers, and thermoplastics.

A styrene-butadiene copolymer having excellent low hysteresis loss characteristic, wet skid resistance, fracture characteristics, and abrasion resistance and a rubber composition comprising the copolymer are disclosed. The styrene-butadiene copolymer has a total styrene content in the range of 33 to 42% by weight of the styrene-butadiene copolymer; a content of styrene sequences having 4 to 20 styrene units in the range of 40 to 65% by weight of the total styrene content, as obtained by measurements by NMR and GPC; a content of styrene sequences having more than 20 styrene units in the range of 5% by weight or less of the total styrene content, as obtained by measurement by GPC; a content of vinyl unit in the range of 30% by mol or less of a butadiene part of the styrene-butadiene copolymer; a sum of the total styrene value and &frac12; of the content of vinyl units in the range of 46 to 52%; and an inner or end structure having, for example tin-carbon bond. The copolymer and the rubber composition are used for tire treads and the like.

Styrene-butadiene copolymer and rubber composition comprising the copolymer

Polymer, process for making the polymer, and rubber composition using the polymer

A functionalized polymer prepared by a process comprising the steps of preparing a solution of a cyclic amine compound, an organolithium compound, and from 3 to about 300 equivalents, based upon one equivalent of lithium, of a monomer selected from the group including diene monomers, vinyl aromatic monomers, and mixtures thereof, where the cyclic amine compound is defined by the formula where R.sub.2 is selected from the group consisting of an alkylene, substituted alkylene, oxy- or N-alkylamino-alkylene group having from about 3 to about 16 methylene groups, N is a nitrogen atom, and H is a hydrogen atom, thereby forming a polymerization initiator having the formula where Li is a lithium atom, SOL is a divalent hydrocarbon group having from 3 to about 300 polymerized monomeric units, y is from 0.5 to about 3, and A is a cyclic amine radical derived from the cyclic amine, charging the solution containing (A)Li(SOL)y with from about 0.01 to about 2 equivalents per equivalent of lithium of a chelating agent, and an organic alkali metal compound selected from the group consisting of compounds having the formula R.sub.4 OM, R.sub.5 C(O)OM, R.sub.6 R.sub.7 NM, and R.sub.8 SO.sub.3 M, where R.sub.4, R.sub.5, R.sub.6 R.sub.7, and R.sub.8 are each selected from the group consisting of alkyls, cycloalkyls, alkenyls, aryls, and phenyls, having from 1 to about 12 carbon atoms; and where M is selected from the group consisting of Na, K, Rb and Cs, and sufficient monomer to form a living polymeric structure, and quenching the living polymeric structure.

Reduced hysteresis products prepared with anionic polymerization

A functionalized polymer includes a polymer chain carrying at least one functional group selected from alkyl, dialkyl and cycloalkyl amine radicals having the general formula ##STR1## and cyclic amine radicals having the general formula ##STR2## where R.sub.1 is an alkyl, cycloalkyl or aralkyl having from 1 to about 12 carbon atoms, and R.sub.2 is an alkylene, substituted alkylene, oxy- or N-alkylamino-alkylene group having from about 3 to about 16 methylene groups. The invention also provides products based upon such polymers.

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Higashiyamato, Japan

Koichi Morita