Momentive Performance Materials Gmbh

Leda N Gonzalez

Richard W Cruse

Eric Raymond Pohl

Antonio Chaves

Rodica Himmeldirk

Melinda Jackson

Larry Allen Divens

Keith James Weller

Robert J Pickwell

Prashant G Joshi

Lesley Hwang

Larry Allen Divins

Martin Hofstetter

Wesley E Sloan

Diol derived blocked mercaptofunctional silane compositions in which the silanes comprise cyclic and bridged alkoxy groups derived from hydrocarbon-based diols and processes for their preparation are provided. Also provided are rubber compositions comprising the cyclic diol-derived blocked mercaptofunctional silanes, processes for their preparation and articles of manufacture comprising the rubber compositions, in particular, automotive tires and components thereof.

Cyclic diol-derived blocked mercaptofunctional silane compositions

Silane compositions of the general formula are provided herein comprising[(RO)(R)&#x2014;Si-M]-L-[(R)Ar&#x2014;(CR&#x2550;CR)]wherein R and Rare independently a hydrocarbon group of from 1 to about 20 carbon atoms; Rare each independently hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; M optionally is a divalent hydrocarbon connecting group of from 1 to about 20 carbon atoms to link the silicon atom and the L group; L is a covalently bound hydrocarbon linking group of from 1 to about 20 carbon atoms or a heteroatom linking group selected from the group consisting of &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x2014;NR&#x2014; wherein Ris hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; Ris an alkyl group of 1 to 12 carbon atoms; Ar is a substituted or unsubstituted aromatic group; q is an integer of 1 to 4; t and c are each independently 0 or 1; and x, y and z are each independently integers of 1 to 3, inclusive, with the proviso that t is 1 when L is a heteroatom group. Also provided are processes for preparing the silane compositions and rubber composition comprising the silane compositions.

Silane compositions, processes for their preparation and rubber compositions containing same

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Norwalk, CT, United States of America

Leda N Gonzalez