Styron Europe Gmbh

Trinseo Europe Gmbh

Evemarie Hamann

Silvia Valenti

Sven Thiele

Joachim Kiesekamp

Sven K H Thiele

Daniel Heidenreich

Norbert Jantsch

Hagen Thomas Bartossek

Karin Schmiedel

Gabriele Holtz

Jose Manu Rego

Amaia Montoya-Goni

Dominique Thielemann

Katja Osswald

Vera Steinert

Hagen Bartossek

The present invention relates to a method for the preparation of a synthetic rubber blend, wherein the blend comprises a high molecular weight polydiene (A) and a low molecular weight polydiene (B). The present invention further relates to a synthetic rubber blend obtainable according to the method described herein; as well as to rubber compositions comprising the blend; and articles, such as tires.

In-situ polymer blend for a tire

A polymer blend consisting of (a) 60-96 percent by weight of a high molecular weight elastomeric polymer, (b) 4-35 percent by weight of a low molecular weight aromatic hydrocarbon polymer, and optionally (c) 0-13 percent by weight of an extender oil, wherein the amounts of the components (a), (b) and (c) are based on the total weight of the polymer blend.

Polymer blend for a tire

A polymer blend consisting of (a) 60-96 percent by weight of a high molecular weight first elastomeric polymer, (b) 4-35 percent by weight of a low molecular weight second polymer, and optionally (c) 0-13 percent by weight of an extender oil, wherein the amounts of the components (a), (b) and (c) are based on the total weight of the polymer blend.

Functionalized polymer blend for a tire

The present invention relates to a modified elastomeric polymer obtained by reacting a living anionic elastomeric polymer and specific chain end modifying compound, wherein the living anionic elastomeric polymer comprises more than 70% and less than 99% by weight of butadiene units and more than 1% and less than 30% by weight of styrene units and has a vinyl bond content of from 2 to less than 10%, based on the polybutadiene fraction of the living anionic elastomeric polymer. The invention further relates to a method of preparing the modified elastomeric polymer and to an elastomeric polymer composition comprising the modified elastomeric polymer.

Low vinyl bond modified elastomeric copolymers

A process for the continuous preparation of modified elastomeric polymers includes (i) providing and polymerizing at least one conjugated diene monomer and, optionally, one or more aromatic vinyl monomer in the presence of an anionic initiator and a compound according to Formula 1, e.g. 2,2-di-(2-oxolanyl)propane or a derivative thereof, to provide a living anionic polymer; and (ii) adding a 'sulfanylsilane' compound to the living anionic polymer. Elastomeric polymers obtainable according to the above process and compositions including the elastomeric polymer and, optionally, further constituents such as oil, filler and/or vulcanizing agent are described. A process for the preparation of a cross-linked elastomeric polymer that includes adding a vulcanizing agent to the elastomeric polymer, as well as articles and compositions that include the elastomeric polymer, the cross-linked elastomeric polymer or both are described.

Modified polymer compositions

The invention provides a process for the continuous polymerization of a polymer comprising monomeric units derived from styrene and 1,3-butadiene, said process comprising:  The invention also provides a composition comprising a polymer comprising monomeric units derived from styrene and 1,3-butadiene, and wherein the polymer has at least the following characteristics:

Low vinyl styrene-butadiene polymers and methods of making the same

A process for polymerization of a polymer containing monomeric units derived from a styrene monomer and a 1,3-butadiene monomer includes polymerizing the monomeric units in the presence of an initiator, a first polar agent, and a second polar agent. The first polar agent includes a structure (I): RRN-Q-NRR; and the second polar agent comprises a structure (II): R, R', R, and Rare each independently selected from the group consisting of an alkyl group and hydrogen; Q contains an alkylene group; Rand Rare each independently an alkyl group; and R, R, R, R, Rand Rare each independently selected from the group consisting of an alkyl group and hydrogen. Polymers prepared by the above process are described, as are compositions containing such a polymer, and articles containing at least one component formed from such a composition.

High styrene high vinyl styrene-butadiene rubber and methods for preparation thereof

A polymer has at least the following characteristics: (a) a block styrene content containing 4 to 6 styrene units from about 27 to about 50 weight percent based on total styrene content in the polymer; (b) a vinyl content from about 30 to about 80 weight percent based on total amount of polymerized 1,3-butadiene; and (c) a styrene content from about 40 to about 70 weight percent based on total weight of polymer. Processes for the polymerization of such a polymer, compositions containing such a polymer, and articles containing at least one component formed from such a composition are described.

A polymer having at least the following characteristics: (a) a block styrene content with more than 4 consecutive styrene units from about 40 to about 70 weight percent based on total styrene content in the polymer; (b) a vinyl content from about 25 to about 80 weight percent based on total amount of polymerized 1,3-diene; (c) a styrene content from about 20 to about 75 weight percent based on total weight of polymer; and (d) a molecular weight distribution (Mw/Mn) of 1.5 or less.

High styrene high vinyl styrene-butadiene rubber with narrow molecular weight distribution and methods for preparation thereof

A polymer having at least the following characteristics: (a) a block styrene content with more than 6 consecutive styrene units from about 15 to about 35 weight percent based on total styrene content in the polymer; (b) a vinyl content from about 25 to about 80 weight percent based on total amount of polymerized 1,3-diene; and (c) a styrene content from about 35 to about 75 weight percent based on total weight of polymer; and (d) a molecular weight distribution (Mw/Mn) of 1.5 or less.

This disclosure generally relates to chain end modified elastomeric polymers and branched modified elastomeric polymers, their use in the preparation of elastomeric compositions, and articles prepared from chain end modified elastomeric polymers and branched modified elastomeric polymers. An elastomeric polymer composition is provided including the reaction product of at least a living anionic elastomeric polymer, a silane modifier compound, and a modifier compound.

Modified elastomeric polymers

The present invention relates to improved compositions of SSBR rubber. The improved compositions exhibit sufficient or improved balance of characteristics such as rolling resistance, HBU, abrasion, grip, and/or tear. The compositions may be made in an efficient, cost-effective manner.

Styrene butadiene rubber with novel styrene incorporation

Compositions comprising a coupled interpolymer such as polybutadiene which may be suitable for HIPS and ABS have been discovered. The coupled interpolymer composition comprises an interpolymer comprising one or more monomeric units derived from a diene wherein the coupled interpolymer composition is characterized by: (A) a halide content of less than about 30 ppm based on the total weight of the coupled interpolymer; (B) a molecular weight distribution of from about 1.6 to about 2.4; and (C) a vinyl content of from about 5 to about 15 weight percent based on the total weight of the coupled interpolymer.

Low chloride polybutadiene

The invention provides a process for polymerizing a polymer comprising monomeric units derived from styrene and 1,3-butadiene, said process comprising: A) adding less than 60 weight percent of the total amount of the butadiene used in the polymerization, to a reactor comprising the total amount of styrene used in the polymerization and solvent; B) adding at least one initiator to the reactor, and allowing the reaction to proceed for a time t; C) adding the remaining amount of butadiene to the reactor in two or more separate additions; and wherein for each butadiene addition, the amount of subsequent butadiene added is less than, or equal to, the amount of butadiene added in the immediately prior addition; and wherein for each butadiene addition, the butadiene is added over a time, t, and after each addition, the reaction is allowed to proceed for a time, t, wherein n is the number of the butadiene addition, and for each addition, n is independently greater than, or equal to, 1.

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Halle, Germany

Evemarie Hamann