GB1105439A - Process for making rubber articles reinforced with textiles - Google Patents

Abstract

Composite articles from textiles and unsaturated, amorphorus terpolymers of ethylene, propylene or butylene-1 and a non-conjugated diene or triene copolymerizable with monoolefins and containing 3 to 22 carbon atoms, which terpolymers have a specific viscosity of 0.5-5.5 dl./g., a Mooney viscosity of 15 to 160 at 100 DEG C., a Defo hardness of 15 to 5000 and an iodine number of 1.5-50, are prepared by (a) treating the textile with an aqueous dip dispersion comprising 10 to 40 weight per cent solids of a reactive phenolformaldehyde per prepared from 1 to 4 moles of formaldehyde per mole of phenol and a latex of an unsaturated, amorphous terpolymer as defined above which has been treated with oxygen or an oxygen donor, (b) embedding the treated textile in a vulcanizable mixture of a substantially identical amorphous terpolymer and (c) vulcanizing the resulting composite structure while imparting thereto its final shape. A saturated amorphous copolymer of ethylene and propylene or butylene-1 may be applied to the terpolymer and covulcanized therewith during the shaping. Many suitable non-conjugated dienes and trienes are specified, and the phenolic resin may be derived from phenol, an alkylphenol, resorcinol or pyrogallol. The terpolymer latex may be prepared by dissolving in a solvent, e.g. hexane or benzene, emulsifying the solution in water and distilling off the solvent, the polymer being treated with oxygen or an organic peroxide, e.g. dibenzoyl peroxide, before, during or after emulsification. The phenolic resin may be added to the latex as a precondensate or formed in situ. In Examples (1 and 2) rayon cord yarns and (3) polyethylene glycol terephthalate cords pretreated with 2,2-bis(glycidylphenyl)-propane, are treated with aqueous dispersions of resorcino/formaldehyde condensates and oxygen-treated terpolymers and the treated materials embedded in vulcanizable compositions of terpolymers, carbon black, zinc oxide, tetramethylthiuram monosulphide and sulphur, the terpolymers being derived from ethylene, propylene and (1) dicyclopentadiene, (2) hexadiene-1,4, hexadiene-1,5,cyclo-octadiene-1,5, 1,5-dimethyl cyclo-octadiene-1,5, 5-butene-2-yl-bi-cyclo - (2:2:1) - heptene - 2 or dicyclopentadiene, and (3) 5-(2-methylbutene-2-yl) bicyclo-(2:2:1)-heptene-2. The products are useful as V-belts and vehicle tyres.ALSO:Textile materials for preparing reinforced composite articles of vulcanised terpolymers of ethylene, propylene or butylene-1 and a non-conjugated diene or triene containing 3 to 22 carbon atoms, having a specific viscosity of 0.5 to 5.5 dl/g, a Mooney viscosity of 15 to 160 at 100 DEG C, a defo hardness of 15 to 5000 and an iodine number of 1.5 to 50, are treated to improve bonding with an aqueous dip dispersion comprising 10 to 40 weight per cent solids of a reactive phenol/formaldehyde resin prepared from 1 to 4 moles of formaldehyde per mole of phenol, and a latex of a terpolymer as defined above which has been treated with oxygen or an oxygen donor. The phenolic resin may be derived from phenol, an alkylphenol, resorcinol or pyrogallol. In examples (1 and 2) rayon yarns and (3) polyethylene terephthalate yarns pretreated with 2,2,-bis (glycidylphenyl) propane are treated with aqueous dispersions in a continuous dipping process, the aqueous dispersions comprising resorcinol/formaldehyde condensates and p oxygen-treated terpolymers derived from ethylene, propylene and (1) dicyclopentadiene; (2) hexadiene-1,4,hexadiene-1,5,cyclooctadiene-1,5, 1,5-dimethyl-cyclooctadiene-1,5, 5-butene-2-ylbicyclo (2,2,1)-heptane-2 or dicyclopentadiene; and (3) 5 (2-methylbutene-2-yl) bicyclo-(2,2,1)-heptene-2.