| 摘要 |
<p>A textile material is coated with a vulcanized ethylene-propylene-copolymerizable diene terpolymer rubber (EPDR), the rubber being adhered to the textile by a deposition on the textile, in an amount of from 0,1-4% by weight of the textile, of a partially-reacted resorcinol-formaldehyde resin applied to the textile from an aqueous solution which may contain up to four parts by weight of natural and/or synthetic rubber or thermosetting acrylic polymer per part by weight of resin, and the treated textile being dried prior to coating with and vulcanization of the terpolymer rubber. The textile material may be dipped in the adhesive solution, and the amount of solids deposited may be controlled by squeezing the solution out of the textile, e.g. by rolls, or by blowing with an air blast. The textile is dried and vulcanizable EPDR stock is coated thereon, for example, by calendering, followed by vulcanization. The textile material may be any conventional fabric used to reinforce rubber articles, e.g. cotton, rayon, nylon or polyester, and it may be in the form of cord or woven fabric, mono-filament or multi-filament cords; plied yarns, or staple fibre. Suitable co-polymerizable dienes include dicyclopentadiene, methyl cyclopentadiene dimer, 1-4-hexadiene, 11-tridecadiene, and 1,9-octadecadiene. Specified synthetic rubbers are SBR, butadiene-vinylpyridine rubber with or without added styrene, butyl rubber latex, EPDR latex, or mixtures thereof. The thermosetting acrylic polymer may be a copolymer of methylacrylamide and methacrylic acid. Conventional compounding ingredients, e.g. accelerators, stabilizers, antioxidants and curatives, may be included in the adhesive solution. After drying the adhesive solution on the textile material at a temperature of at least 250 DEG F., the EPDR rubber stock is contacted with the adhesive-treated surface of the textile. The EPDR rubber stock is compounded for vulcanization using conventional curatives and accelerators, and optionally antioxidants, preservatives and fillers. The EPDR may be oil-extended and blended with saturated EPR (ethylene-propylene copolymer rubber).</p> |
