The adhesive properties of compositions which contain an organic isocyanate, with or without a film-former, are improved by the inclusion of (a) an aliphatic hydrocarbyl nitrite or (b) a nitrite ester of a carbamic acid which acts as an adhesive promoter. The compositions are useful for adhering natural and synthetic polymeric elastomers, and are particularly useful in the production of laminations formed from polyurethane polymers and other substrates including metals, etc. and especially the formation of laminations from the cured tread of a conventional rubber to a curable polyurethane prepolymer composition which can be formed in the shape of a tire body.
The inventive electroconductive adhesive comprises a resinous matrix, as a dispersing medium of conductive particles, of a polyester-based urethane resin admixed with a masked isocyanate compound as the curing agent. By virtue of the masking of the isocyanate reactivity of the curing agent, the adhesive composition is stable during prolonged storage under a hot temperature or high-humidity condition but can exhibit curing activity when the adhesive is heated at a temperature at which the isocyanate reactivity can be restored.
Unvulcanized or partially vulcanized rubber is coated with a coating poly capable of co-vulcanizing with the rubber and having functional groups capable of reacting with an adhesive. The coated rubber is then subjected to vulcanizing conditions. When the treated rubber surface is bonded to an adhesive, the functional groups react with the adhesive forming strong bonds.
A wheel tread locking circular groove invention designed primarily to bond very difficult to bond materials to a given wheel hub or wheel rim without an adhesive which could be used for commercial, industrial, automotive, and all other purposes where a revolutionary state-of-the-art wheel product is needed. The resultant benefits of the locking circular grooves are derived from specific mathematical ratios. These mathematical ratios are a product of groove design dimensions. Another part of the invention is to bring together the wheel tread locking invention with a newly developed state-of-the-art engineering thermoplastic polyurethane resin designated as Isoplast.RTM. grade 202 with specifications far superior to that of any conventional material that can be used for wheel tread material forming a new product that has been needed for a very long time. This resultant combination of the present invention with the Isoplast.RTM. grade 202 will benefit everyone in the country, as all goods, food products, etc., ride over a wheel by truck or by skid on an electric pallet jack.
This disclosure relates to a pnuematic tire having a rubber tread and a cast, fabricless, elastomeric body of a material having viscoelastic properties. The ratios of the structural stiffness of the mid-sidewall of the tire body to the structural stiffness of the shoulder of the tire body and the crown of the tire body, and the tire body's resulting shape, are critical to give a durable, stable, long-wearing tire. These ratios yield a tire which has acceptable growth levels in its cross-sectional dimension on inflation and service and which has the crown area of the body functionally decoupled from the sidewall area so that the crown area functions in a manner similar to the belt of a radial ply tire.
The invention relates to a multi-layer or laminated compound body, in particular vehicle tire in which at least one first layer or ply, in particular on polyurethane basis, is bonded via a coupling agent layer on polyurethane basis to a second layer or ply, in particular on polydiene basis, which layer is preferably at least essentially free of polyurethane. According to the invention, it is provided that the coupling agent layer is formed of a polyenol polyurethane whose polyenol component in a manner known per se has an OH-functionality of less than 2.1, in particular of 1.7 to 2.05, preferably of 1.9 to 2.0, at preferably terminal hydroxyl groups, and/or a corresponding polyenethiol polyurethane. The invention further relates to a process for the production of the compound body and a coupling mass for performing the process.
