This invention relates to a tire with a tread of a rubber composition containing a combination of high and low glass transition temperature (Tg) synthetic elastomers. The high Tg elastomer is comprised of a high Tg, high vinyl content, functionalized polybutadiene rubber and the low Tg elastomer is comprised of a low Tg, low vinyl content, functionalized polybutadiene rubber. The tread rubber may contain traction resins, may contain rosin acid and may contain triglyceride vegetable rubber processing oil.

This invention relates to a rubber composition containing filler reinforcement comprised of precipitated silica with silica coupling agent therefore and conjugated diene-based elastomer which contains end-chain functionalization with multi-functional groups. The groups functionalizing the elastomer are multi-functional in the sense of containing one group reactive with at least one of said precipitated silica and silica coupling agent and another different group reactive with diene-based elastomers through sulfur cure of the rubber composition. A sulfur cured rubber composition containing said end-chain functionalization is provided. A tire is provided having a component comprised of said rubber composition. Representative of said tire component is a tire tread.

The present invention relates to articles comprising crosslinked polymer network comprising thioether crosslinks and process of making and using same. Such thiol-ene crosslinking reactions not only make the isocyanate crosslinking reaction unnecessary, but they also improve the article's strength due to chemical crosslinking between the article's resin layers, and reduce or eliminate post curing. Thus resulting in a sufficiently cured article in a much shorter time.

The present invention relates to articles comprising crosslinked polymer network comprising thioether crosslinks and process of making and using same. Such thiol-ene crosslinking reactions not only make the isocyanate crosslinking reaction unnecessary, but they also improve the article's strength due to chemical crosslinking between the article's resin layers, and reduce or eliminate post curing. Thus resulting in a sufficiently cured article in a much shorter time.

A functionalized polymer can be prepared by a process that includes reacting (a) an ethylenically unsaturated reactant polymer which, at its terminus, includes Si-containing repeat unit(s) with (b) one or more silanes, at least one of which includes at least one primary amine, secondary amine, phosphine, hydroxyl, thiol, cyano, urea or thiourea group.

A functionalized polymer can be prepared by a process that includes reacting (a) an ethylenically unsaturated reactant polymer which, at its terminus, includes Si-containing repeat unit(s) with (b) one or more silanes, at least one of which includes at least one primary amine, secondary amine, phosphine, hydroxyl, thiol, cyano, urea or thiourea group.

The present invention relates to a detoxified powder composition comprising a zinc-bearing compound selected from the group consisting of zinc carbonate, zinc hydroxide, zinc oxide, zinc sulphate and mixtures thereof, and at least one detoxification agent containing at least one oxide based on a cation, selected from the group consisting of calcium, barium, magnesium, strontium and beryllium.

The present invention relates to a detoxified powder composition comprising a zinc-bearing compound selected from the group consisting of zinc carbonate, zinc hydroxide, zinc oxide, zinc sulphate and mixtures thereof, and at least one detoxification agent containing at least one oxide based on a cation, selected from the group consisting of calcium, barium, magnesium, strontium and beryllium.

A vulcanizate of a rubber mixture for a vehicle tire, the rubber mixture containing at least one filler and 10 to 100 phr of at least one polymer A of the following formula:
PSR.sup.1SR.sup.2).sub.n
where S is a sulfur atom, and P is a polymer chain which is obtainable by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified, R.sup.1 is most preferably C.sub.1-C.sub.8-alkyl, R.sup.2 is preferably selected from H and SiR.sup.3R.sup.4R.sup.5 in which R.sup.3, R.sup.4 and R.sup.5 are independently selected from H, C.sub.1-C.sub.16-alkyl, C.sub.6-C.sub.16-aryl and C.sub.7-C.sub.16-aralkyl, and n is an integer selected from 1 to 200, where the SR.sup.1SR.sup.2 group(s) are bonded to the backbone of the polymer chain P.

A vulcanizate of a rubber mixture for a vehicle tire, the rubber mixture containing at least one filler and 10 to 100 phr of at least one polymer A of the following formula:
PSR.sup.1SR.sup.2).sub.n
where S is a sulfur atom, and P is a polymer chain which is obtainable by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified, R.sup.1 is most preferably C.sub.1-C.sub.8-alkyl, R.sup.2 is preferably selected from H and SiR.sup.3R.sup.4R.sup.5 in which R.sup.3, R.sup.4 and R.sup.5 are independently selected from H, C.sub.1-C.sub.16-alkyl, C.sub.6-C.sub.16-aryl and C.sub.7-C.sub.16-aralkyl, and n is an integer selected from 1 to 200, where the SR.sup.1SR.sup.2 group(s) are bonded to the backbone of the polymer chain P.