Exxonmobil Chemical Patents Inc.

Mauritz Kelchtermans

Sunny Jacob

Allen David Godwin

Raphael Frans Caers

Michael F McDonald, Jr

John A Clark

Jean-Jacques G Muls

Leming Gu

Stephen T Dalpe

Torri L Rose

This invention relates to a method of preparing a brominated elastomer having a stabilized Mooney viscosity. The method includes polymerizing isomonoolefins and at least one polymerizable unit to obtain an elastomer/polymer; brominating the elastomer/polymer to form a brominated elastomer effluent; neutralizing the brominated elastomer effluent to form a neutralized effluent; volatizing off the hydrocarbon solvent; and recovering a brominated elastomer. In at least one point of the process, preferably prior to any significant temperature change in the brominated polymer, a Mooney stabilizer is added into the system. Portions of the Mooney stabilizer may be added at multiple points into the process.

Process for preparing a halogenated elastomer with improved Mooney viscosity stability

Mixtures of Cprimary alcohols, preferably Calcohol rich, comprise from 15 to 70 wt. % unbranched molecules, the balance being branched molecules having an average branchiness of at most 2.00 branches per molecule, at least 80% of the ranches being methyl branches and at least 50% of the branched molecules being mono-methyl branched. Plasticiser esters and surfactant derivatives derived from these alcohol mixtures are also provided. The alcohol mixtures are preferably produced by hydroformylation of octene rich streams formed by Fischer-Tropsch synthesis.

Mixtures of C8-C10 alcohols

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Leefdaal, Belgium

Mauritz Kelchtermans