摘要:
The present invention relates to a pneumatic tire providing at least at part of the bead toe portion a rubber composition containing 70 to 100 parts by weight of an ethylenic unsaturated nitrile-conjugated diene-based highly saturated rubber having a content of conjugated diene units of not more than 30 percent by weight and containing 20 to 120 parts by weight of zinc methacrylate.
摘要:
A pneumatic tire constituting part or all of the part members constituting the pneumatic tire by a rubber composition containing, based on a total 100 parts by weight of a rubber containing at least 70 parts by weight of an ethylenic unsaturated nitrile-conjugated diene-based highly saturated rubber having a content of conjugated diene units of not more than 30 percent by weight, 0 to 120 parts by weight of zinc methacrylate and 0 to 60 parts by weight of carbon black and having a total of formulations of zinc methacrylate and carbon black of 10 to 120 parts by weight, and providing, between the above part members and the adjoining diene-based rubber layer, a bonding rubber layer comprising of a rubber composition containing, based on a total 100 parts by weight of a predetermined diene-based rubber and acrylonitrile butadiene copolymer rubber, 5 to 80 parts by weight of a predetermined aromatic petroleum resin.
摘要:
A product and process for imparting decorative appliques to the sidewalls of tires during the curing operation are presented. A spool of applique composite material is maintained for feeding into a tire mold or onto a transfer device, thereby defining a ring for vulcanization to a tire. The applique consists of a laminate received upon a carrier, the laminate having a first barrier layer and a congruent second decorative layer. The laminate is received by a tire sidewall between two grooves which serve to isolate the decorative layer from the tire itself.
摘要:
A process and composition for applying and bonding an amine curable polymer or prepolymer at ambient temperatures to the surface of a cured elastomer substrate. The elastomer article or substrate is treated with an organic oxidant such as an N-halohydantoin, N-haloamide, or an N-haioimide, for example, the various isomers of mono-, di-, and trichloroisocyanuric acid. A polyisocyanate is applied thereto. A composition of the amine curable polymer or prepolymer is prepared with an amine curing agent. To the curing agent and curable polymer or prepolymer composition is added a polar solvent which is mixed with the resulting blend or mixture and added to the treated elastomer surface; said polymer or prepolymer cures at ambient temperature and becomes bonded to said elastomer. The application is relatively easy, since the entire mixture is a liquid and can be applied in situ. The invention is particularly suitable for repairing various damaged elastomer articles such as tires (especially off-the-road), conveyor belts, hoses, preparation of caulking or sealing compounds, and especially in bonding tire lugs or tire treads to a tire carcass.
摘要:
Pneumatic tire sidewall compositions are disclosed comprising blends of a halobutyl rubber, a high unsaturation rubber and an oil extended terpolymer of ethylene, propylene, and a diene wherein the oil extended terpolymer contains from between 25 to 150 phr of a paraffinic or naphthenic oil. These triblends provide sidewalls of unexpectedly improved flex resistance, even as compared to similar triblend compositions in which similar amounts of oil are included, but in which an oil extended terpolymer is not employed. Furthermore, methods of preparing such compositions are also disclosed comprising preparing an oil extended terpolymer, and then blending that terpolymer with the halobutyl and high unsaturation rubbers.
摘要:
A process and composition for applying and bonding a curable polymer or prepolymer, for example, an amine curable polymer or prepolymer, at ambient temperatures to the surface of a cured elastomer substrate. The elastomer article or substrate is treated with an organic oxidant such as one selected, for example, from the group consisting of N-halosulfonamides, N-halohydantoins, N-haloamides, N-haloimides, and the various isomers of mono-, di-, and trichloroisocyanuric acid. A composition of a curable polymer or prepolymer is prepared with a curing agent. To the curing agent and curable polymer or prepolymer composition is added a polar solvent which is mixed with the resulting blend or mixture and added to the treated elastomer surface; said polymer or prepolymer cures at ambient temperature and becomes bonded to said elastomer. The application is relatively easy, since the entire mixture is a liquid and can be applied in situ. The invention is particularly suitablefor repairing various damaged elastomer articles such as tires (espe- I cially off-the-road), conveyor belts, hoses, preparation of caulking or sealing compounds, and especially in bonding tire lugs or tire treads to a tire carcass.
摘要:
A pneumatic tyre comprises a tread rubber layer (2), a side rubber layer (V) and a wing rubber layer (12) interposed between the tread rubber layer (2) and the side rubber layer (V). The side rubber layer (V) comprising a radially outer black sidewall rubber (15), a radially inner black sidewall rubber (16) and a white sidewall rubber (14) therebetween. The surface of the wing rubber layer (12) consists of a part (12a) contacting with the carcass (6), a part (12b) contacting with the tread rubber layer (2) and a part (12c) contacting with the radially outer black sidewall rubber (15) and the white sidewall rubber (14). The surface of the radially outer black sidewall rubber (15) consists of a part (15c) extending form the tread edge (P1) to a point (P3) on the tyre outer surface, a part (15a) contacting with the wing rubber layer (12) and extending from the tread edge (P1) to a point (P2), and a part (15b) contacting with the white sidewall rubber (14) and extending from the point (P2) to the point (P3). The radially inner black sidewall rubber (16) extends radially inwardly from a point (P4) on the tyre outer surface radially inside the point (P3) while contacting with the axially outside of the white sidewall rubber (14). The white sidewall rubber (14) is provided between the point (P3) and the point (P4) with a protruding part (17) so that the thickness (DP) of the white sidewall rubber (14) in the protruding part (17) measured from the outer surface to cords of the carcass is not less than 4 mm. The thickness (DS) of the radially outer black sidewall rubber (15) having a maximum value of not less than 3 mm at the point (P2).
摘要:
A pneumatic tire having an air permeation preventive layer comprising a low permeability thermoplastic elastomer composition comprising a thermoplastic elastomer having a thermoplastic resin composition as a continuous phase and a rubber composition as a dispersed phase, in which a barrier resin composition is contained, which low permeability thermoplastic elastomer composition has a phase structure in which the barrier resin composition is dispersed in the form of a flat state in the thermoplastic elastomer, is abundant in flexibility, is superior in gas permeation preventive property, and enables the tire to be reduced in weight.