| 摘要 |
<p>Rubber mixtures consisting of (1) 20 - 75 parts of a copolymer containing 60 - 80% by weight of ethylene, 20 40% by weight of an .alpha.-alkene, and 0 - 20% by weight of one or more polyenes and having, in the unvulcanized state, an elongation at rupture of over 800% and a tensile strength of between 10 and 100 kg/cm ; (2) 80 - 25 parts of at least one polymeric material which is a styrene-butadiene copolymer; polybutadiene or polyisoprene; and (3) a tackifier resin and optionally conventional fillers and additives, wherein the mixture of (1), (2) and (3) has an elongation at rupture of at least 800% and a tensile strength of between 1.3 and 50 kg/cm2. Such rubber mixtures have a higher degree of tack than the mixtures of the prior art. The rubber mixtures of the present invention are useful in the manufacture of multipart or multilayer articles such as driving belts, conveyor belts and car tires. The additional tack of the rubber provides permanent adhesion between the various parts or layers of the article during assembly and vulcanization.</p> |
