Abstract: A silica reinforced solventless adhesive composition or cushion comprises a blend of rubber, silica, a silica coupling agent, an optional tackifier, and low or nil amounts of carbon black. The elastomeric adhesive composition can be utilized with various other rubber layers to adhere a cured or uncured tire tread to a cured tire casing. The elastomeric adhesive composition has good blowout resistance and a very low, final blowout test temperature.

Abstract: Preparation of an elastomer which contains a dispersion of filler reinforcement by forming a filler reinforcement in situ within the elastomer host, the resulting elastomer/filler composite and tire having component which contains such reinforced elastomer. The invention includes a rubber composition of at least two elastomers wherein one of said elastomers is a pre-formed composite of elastomer and in situ formed filler reinforcement. A tire having a component of is such rubber composition, particularly a tire tread, is specifically contemplated.

Abstract: The invention relates to a rubber composition containing a modified silanol-containing carbon black reinforcement which has a grafted hydrocarbon on its surface. The invention also relates to an article such as, for example, a tire having at least one component of such rubber composition.

Abstract: A rubber composition as a blend comprised of an elastomer(s), and particulate reinforcement provided as an intimate blend of carbon black particles and fumed silica particles, together with a coupling agent.A tire having a component of such rubber composition such as, for example, a tread, is specifically contemplated.

Abstract: Preparation of an elastomer which contains a dispersion of filler reinforcement by forming a filler reinforcement in-situ within the elastomer host, the resulting elastomer/filler composite and tire having component which contains such reinforced elastomer. The invention includes a rubber composition of at least two elastomers wherein one of said elastomers is a pre-formed composite of elastomer and in-situ formed filler reinforcement. A tire having a component of such rubber composition, particularly a tire tread, is specifically contemplated.

Abstract: A method of preparing a pre-formed elastomer/filler composite of a diene-based elastomer and particulate filler dispersed therein by polymerizing monomers in the presence of said filler with a polymerization promoting catalyst in which at least a portion of said catalyst is pre-deposited on said filler. Such pre-formed elastomer composite is also contemplated as well as a rubber composition comprised of a blend of such pre-formed composite and at least one additional elastomer. Such filler may be, for example, precipitated silica, carbon black and/or a modified carbon black. A tire having a component of such composite or rubber composition such as, for example a tread, is also provided.

Abstract: A tire tread composition comprises a tread rubber compound containing a sulfonamide modified EPDM terpolymer which imparts improved abrasion resistance, improved ozone resistance, improved hysteresis and the like.

Abstract: A pneumatic tire with tread composed of a sulfur cured rubber comprised of, based on the rubber, (A) cis 1,4-polyisoprene, (B) at least one of isoprene/acrylonitrile rubber and butadiene/acrylonitrile rubber and, optionally, (C) at least one additional rubber.

Abstract: A safety support system for a tubeless tire and rim assembly which is adaptable for field mounting of the tire on the rim. The tire cavity within the tire contains a safety support body made up of an outer ring member and an inner ring member. The outer ring member is of resilient foam material providing cushioning and support of the tire. The inner ring member is of a substantially incompressible material which is flowable for injection into the tire cavity of the outer ring member and maintain the bead portions of the tire on said bead seats of said rim during operation.

Abstract: The use of metal salts in vulcanizable elastomer compounds is described. In sufficient amounts, the metal salts function as both vulcanization accelerators and adhesion promoters for rubber to metal adhesion, thus eliminating the need for a separate ingredient for each purpose. Certain of the salts also promote the adhesion of the elastomer to metal adherends which have heretofore been unknown, for example, to a zinc surface. Curing characteristics of elastomer formulations using the metal salts are comparable to those using prior art accelerators.

Abstract: A process for preparing rubber compositions comprised of a (a) 100 parts rubber material including 65-100 parts of cis-polyisoprene and optionally at least one additional high unsaturation rubber, (b) 40-70 parts Carbon Black and (c) conventional vulcanization and processing additives.The composition is mixed in two consecutive stages, in the first stage all the carbon black is mixed with at least 50 parts of the cis-polyisoprene, and in the second stage the remaining polyisoprene and any optional additional rubber is added to the mix.This method of mixing material has been observed to produce a rubber composition having enhanced tear and adhesion properties as compared with conventional processes where the rubber is mixed with the carbon black in one mixing stage.Thus, the invention is also directed to the resulting rubber composition and to a composite of such composition containing a filament reinforcement.

Abstract: A method of preparing a composite of polyurethane bonded to the surface of a cured rubber substrate and the resulting composite. The method is comprised of first applying to a cleaned, cured rubber surface a coating of methylmethacrylate-natural rubber graft polymer and then applying a liquid polyurethane reaction mixture which is cured to form the resultant composite. The invention is particularly directed to the preparation of a tire comprised of a polyurethane carcass applied to a cured rubber tread and to a tire comprised of a polyurethane tread applied to a cured rubber carcass.

Abstract: A method of preparing a composite of polyurethane bonded to the surface of a cured rubber substrate and the resulting composite. The method requires the rubber substrate to contain an hydroxyl terminated polybutadiene polyol. The method is practiced by first applying to a cleaned, cured rubber surface containing the polybutadiene polyol a coating of cyanuric acid followed by an additional coating of a phenol formaldehyde resin and then applying a liquid polyurethane reaction mixture which is cured to form the resultant composite. The invention is particularly directed to the preparation of a tire comprised of a polyurethane carcass applied to a cured rubber tread and to a tire comprised of a polyurethane tread applied to a cured rubber carcass.

Abstract: Lubricant composition comprised of clay, two polydimethylsiloxanes, poly(ethylene glycol and/or propylene glycol) and surfactant(s); tire cure bladder coated therewith; and a method of molding a rubber tire utilizing such a coated cure bladder.

Abstract: A lubricant composition comprised of (A) fatty acid, (B) polytetrafluoroethylene fluorocarbon resin powder (C) pyrogenic amorphous silica powder and (D) carrier. The lubricant is prescribed for use with a pneumatic tire and wheel assembly containing a run-flat device. The lubricant is contemplated as a component in such an assembly.

Abstract: Composite of rubber and metal reinforcement where the rubber contains borate and a cross-linkable monomer. Cured composite is useful as component for rubber tires, industrial belts and hose.

Abstract: The method of molding a pneumatic tire having a radially outer tread portion, a tire casing underlying the tread portion and a reinforcing cord belt interposed between the tread portion and casing in which the tread portion is spin cast and then partially cured in the mold, the reinforcing cord belt is then fastened to the tread portion, a core inserted in the mold and the tire casing spin cast and cured. The reinforcing cord belt may be adhered to the tread portion by staples or a skim coat adhesive to hold the belt in place during the spin casting of the tire casing.

Abstract: In a process for reclaiming sulfur-vulcanized rubber in the presence of oil, water vapor and aryl disulfide peptizer at elevated pressure and temperature, an improvement where said disulfide is obtained as a mixture also containing dissolved volatile mercaptan which comprises treating said disulfide mixture by distillation prior to its use in said reclaim process to remove said volatile mercaptan.

Abstract: Rubber tire curing bladder having a coating containing a polydimethylsiloxane, a silane a surfactant and optionally a metal salt of an organic acid.

Abstract: An aqueous lubricating composition for tire curing bladders containing polydimethylsiloxane, methyl hydrogen or methyl trimethoxy silane, a surfactant and optionally a metal salt of an organic acid.