Exxonmobil Chemical Patents Inc.

Robert J Claassen, Ii

Anthony Jay Dias

Edward John Blok

Eugene Ronald Uhl

Michael Brendan Rodgers

Thomas R Barbee

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) made in a pre-reaction adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof.

Silane-functionalized hydrocarbon polymer modifiers for elastomeric compositions

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof. The method comprises melt processing a mixture to form the elastomeric composition in the shape of an article, wherein the mixture comprises elastomer, Si-HPM, silica, bifunctional organosilane crosslinking agent; and curing the elastomeric composition to form the article. Also disclosed are a silylated hydrocarbon polymer modifier coupled with a bifunctional organosilane crosslinking agent, and a silica-coupled hydrocarbon polymer modifier coupled to the silica via the bifunctional organosilane crosslinking agent.

An elastomeric composition for a curing bladder comprises isobutylene based elastomer, curative and a hydrocarbon polymer modifier comprising monomers selected from the group consisting of piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof, wherein the cyclic pentadienes comprise at least 10 weight percent of the monomers by total weight of the monomers. Also disclosed are a tire curing bladder made from the elastomeric composition, a tire curing press containing the bladder, a method of making the tire curing bladder, an improvement to the process of making the tire curing bladder to improve processability of the mixture and fatigue life and DeMattia cut growth, a method of making a tire using the tire curing bladder, and an improvement to the process of making a tire to extend a pull point of the curing bladder and/or to reduce the curing time for the tire construct.

Tire curing bladders

An elastomeric composition incorporating a hydrocarbon polymer modifier including piperylene, cyclic pentadiene and aromatic components, and having a softening point from 80&#xb0; C. to 160&#xb0; C., z-average molecular weight greater than 10,000, and at least 1 mole percent aromatic hydrogen, based on the total moles of hydrogen in the modifier. In a method, the elastomeric composition is processed with a cure package into a composition in the desired shape, which is cured to form the article. The modifier may optionally be immiscible with an elastomer in the composition and/or co-cured with the elastomer or filler in the composition. A tire or tire component may include the elastomeric composition.

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Baytown, TX, United States of America

Robert J Claassen, Ii