Styron Europe Gmbh

Trinseo Europe Gmbh

Karin Schmiedel

Evemarie Hamann

Silvia Valenti

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.

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Halle, Germany

Karin Schmiedel