Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; and, (c) at least one thiuram disulfide accelerator, it being provided that diphenyl guanidine is substantially absent in the rubber composition. The compositions may also include suitable amounts of other ingredients such as carbon black, coupling agents, antiozonants, antioxidants, etc.

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.

Abstract: A rubber composition comprising (a) a rubber component; (b) silica as a reinforcing filler; (c) a reinforcing additive comprising a mixture and/or the product of in situ reaction of (i) at least one functionalized mercaptosilane compound containing, per molecule, at least one functional group capable of bonding chemically and/or physically with the surface hydroxyl sites of the silica filler and at least one other functional group capable of bonding chemically and/or physically to the chains of the rubber component and (ii) at least one functionalized organosilane compound, other than a mercaptosilane compound, containing, per molecule, at least one functional group capable of bonding chemically and/or physically with the mercaptosilane compound and/or the hydroxyl sites of the silica filler and at least one other functional group capable of bonding chemically and/or physically to the chains of the rubber component; and (d) an effective amount of a thiuram disulfide accelerator having a molecular weight of at

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a carbon black filler; (c) a thiuram disulfide accelerator having a molecular weight of at least about 400 and (d) an effective amount of an activator for the thiuram disulfide accelerator. The compositions may also include suitable amounts of other ingredients such as antiozonants, antioxidants, etc.

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a carbon black filler and (c) an effective amount of a thiuram disulfide accelerator of the general formula 1

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; and (d) a cure-enhancing amount of at least one polyalkylene oxide having a weight average molecular weight less than 200. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.

Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.

Abstract: Tire tread compositions comprisinga) a first rubber component comprising about 60-90 parts of styrene butadiene rubber (SBR) comprising less than 20 percent by weight of styrene, per hundred parts of rubber (phr);b) a second rubber component comprising about 10-40 phr of nitrile-butadiene rubber (NBR);c) 30-80 phr of carbon black;d) 10-20 phr of silica;e) 1-3 phr of a silane coupling agent; and, optionally,f) a third rubber component comprising about 10-30 phr of a high cis polybutadiene rubber (cis BR). The tire tread compositions provide tires with excellent wet traction and low rolling resistance.

Abstract: This invention relates to the improvement of rubber-to-metal adhesion and adhesion retention in sulfur vulcanizable, metal reinforced rubber compositions via the use of metal acrylate and/or methacrylate adhesion promoters.

Abstract: A new class of antiozonant compounds, namely tris(N-alkyl-p-phenylenediamino)-1,3,5-triazine compounds, are incorporated into thermosetting compositions having at least one highly unsaturated rubbery polymer and at least one other elastomer having lesser unsaturation, such as EPDM. Thermosetting compositions are most useful as tire sidewall compositions which may be preferably cured with blends of organic peroxide and sulfur donor accelerators.

Abstract: A carcass for a self-sealing pneumatic tire is constructed by starting with an extruded thin flat strip of puncture sealant both surfaces of which are detackified. The strip is place on a building drum and its upper surface is wiped clean so that an inner liner may be adhered to it. Thereafter, the carcass is conventionally completed with superimposed successive layers of belts, and tread along with bead rings, etc. The carcass is then cured in a conventional curing press so that the sealant is cured by contact with the curing bladder. The curing sealant is not restrained in any way, but does not flow. Alternatively, a laminate of the sealant is formed with the inner liner, with only the exposed surface of the sealant detackified so that it adheres neither to the building drum nor to the curing bladder. The detackifier remains on the sealant.

Abstract: Tire compounds containing an elastomer, and a resin cured with 1-aza-5-methylol-3,7-dioxabicyclo (3,3,0) octane are disclosed, as well as methods for the preparation of such compounds.

Abstract: A new class of antiozonant compounds, namely tris(N-alkyl-p-phenylenediamino)-1,3,5-triazine compounds, are incorporated into thermosetting compositions having at least one highly unsaturated rubbery polymer and at least one other elastomer having lesser unsaturation, such as EPDM. Thermosetting compositions are most useful as tire sidewall compositions which may be preferably cured with blends of organic peroxide and sulfur donor accelerators.

Abstract: A carcass for a self-sealing pneumatic tire is constructed by starting with an extruded thin flat strip of puncture sealant both surfaces of which are detackified. The strip is place on a building drum and its upper surface is wiped clean so that an inner liner may be adhered to it. Thereafter, the carcass is conventionally completed with superimposed successive layers of belts, and tread along with bead rings, etc. The carcass is then cured in a conventional curing press so that the sealant is cured by contact with the curing bladder. The curing sealant is not restrained in any way, but does not flow. Alternatively, a laminate of the sealant is formed with the inner liner, with only the exposed surface of the sealant detackified so that it adheres neither to the building drum nor to the curing bladder. The detackifier remains on the sealant.

Abstract: A process is disclosed for extruding a flat strip of uniformly thick sealant stock from an extruder which extrudes the sealant stock with a rotary helical action. The stock consists essentially of a vulcanizable mixture of a high molecular weight (mol wt) elastomer, a low mol wt elastomer, a curing agent and a processing aid selected from a tackifier and a homogenizer. The strip is less than about 10 mm thick, and at least 10 times as wide as it is thick. The stock does not flow and cannot be poured even at 212.degree. F. The stock is supplied to the extruder by a reciprocating pump which maintains an intermittent pressure yet provides the required uniform thickness of strip. Each component of the stock strongly adheres to any surface, to all metal surfaces and to each other, making it difficult to obtain a homogeneous mixture.

Abstract: Tires possessing a tread composition formed by curing a blend comprised of: (A) at least one suitable rubber; (B) an effective amount of curative; (C) carbon black; and (D) a processing aid comprised of (i) C.sub.12 -C.sub.50 paraffin wax; and (ii) pentaerythritol tetrastearate, which processing aid preferably further comprises a carrier such as calcium carbonate are most easily processed and exhibit improved handling, durability and rolling resistance as well as reduced heat buildup.

Abstract: A self-sealing pneumatic tire that has an inner surface provided with a layer of sealant and a plurality of edge strips that partially overlap the sealant layer to retain the sealant in position during construction and operation of the tire. Construction is simplified by utilizing a laminate structure incorporating such edge strips and also comprising an air impermeable elastomer strip, the center of which is coated with a layer of puncture sealant material and having the edge strips adhesively attached to the elastomer strip and partially overlapping the edges of the sealant layer. Also, a method of constructing this tire by attaching a tire body or carcass to this laminate structure prior to molding and curing the tire. During the molding process, the edge strips that partially overlap the sealant layer hold the sealant in place preventing it from flowing in an uncontrolled manner.