Advanced Elastomer Systems, L.p.

Other

Gary W Gilbertson

Robert E Medsker

Raman P Patel

Donald R Hazelton

Kuo-Shein Shen

Jianqun Zhao

Periagaram Srinivasan Ravishankar

Sabet Abdou-Sabet

Donald S Wang

Ronald L Hazelton

Robert Eugene Medsker

In the preparation of thermoplastic elastomers by hydrosilylation crosslinking of the elastomeric component, the use of an elastomer containing a non-conjugated diene and having a Mooney viscosity within the MST range of 45 to 100 provides products with a high level of crosslinking and an improved combination of physical properties. This improvement is obtained even at low concentrations of hydrosilylation catalyst.

Hydrosilylation crosslinking of thermoplastic elastomer

Thermoplastic vulcanizates are described which include a carbonyl containing or carbonyl functionalized rubber crosslinked with a hydrosilylation crosslinking agent activated with a platinum containing catalyst. The carbonyl containing or carbonyl functionalized rubber facilitates making thermoplastic vulcanizates with higher lubricity, better contact clarity and alternative surface properties.

Vulcanization of carboxyl containing elastomers using reductive hydrosilylation with extension into dynamic vulcanization

An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking, in which a hydrosilylation crosslinking agent with a low degree of polymerization and/or a hydrosilylation crosslinking agent diluted in oil is used.

Preferred process for silicon hydride addition and preferred degree of

Phenolic resin curatives having a majority of dibenzyl ether linkages were unexpectedly found to be very effective in curing unsaturated rubbers in a blend of a crystalline polyolefin and said rubber. Their effectiveness exceeds that of conventional phenolic resins for many thermoplastic vulcanizate compositions allowing for the reformulation of the recipes with lower amounts of curatives and equivalent or superior physical properties in the resulting thermoplastic vulcanizate.

Preferred structure of phenolic resin curative for thermoplastic

An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking, in which a platinum containing hydrosilylation catalyst is used in combination with oil which is substantially free of materials which have the chemical behavior of a Lewis base. A crosslinked rubber component is obtained in the thermoplastic elastomer composition.

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Wadsworth, OH, United States of America

Gary W Gilbertson