GB1101371A - Bonding textiles to rubbers - Google Patents

Abstract

Textile material is bonded to a cured rubber composition by treating the textile material with an admixture in aqueous dispersion of an incompletely condensed phenolic resin, e.g. resorcinol-formaldehyde, and a blend of (1) an aqueous dispersion of a copolymer of 50 to 90% by wt. of a conjugated diene monomer, examples of which are given, and 50 to 10% by wt. of an unsaturated ketone, examples of which are given, and (2) an aqueous dispersion of a polymer or copolymer of at least one conjugated diene monomer, e.g. a polybutadiene or butadiene/styrene latex, the blend containing from 0.2 to 10% by wt. of the unsaturated ketone based on the total polymer content of the blend, drying the treated textile material, coating the dry material with curable mono-olefine and/or diolefine rubber composition, and curing the rubber composition. The ratio by weight of phenolic resin to total polymer content of the blend may be from 1:9 to 9:1. The admixture of aqueous dispersions may have a total solids content of 5 to 30% by wt. The mono-olefine rubber may be a polymer or copolymer of at least one alpha mono olefine and also an interpolymer of at least 2 alpha mono olefines together with at least one additional compound serving to confer unsaturation on the uncured interpolymer. The compound which confers unsaturation, examples of which are given, may be a diene monomer and comprises up to 15 mole % of the interpolymer. The alpha mono olefines of the mono-olefine rubber, examples of which are given, preferably contain from 2 to 4 carbon atoms. The mono-olefine rubber may contain ethylene in an amount of from 40 to 80 mole % of the olefine content. The diolefine rubber may be natural rubber, and polymers and copolymers of at least one diolefinic compound, e.g. chloroprene. The textile material may be fibres and cords of rayon, cotton, polyamides, e.g. nylon, and polyesters, e.g. polyethylene glycol terephthalate. The polyester fibres may be given an initial treatment with a composition comprising polyvinyl chloride and a cross-linking agent, e.g. triallyl cyanurate, a polyamide resin, an isocyanate, polyethylene imine or with hexamethylene diethylene urea. The cords may be drawn through the latex, and embedded in the rubber composition.ALSO:Textile material, e.g. fibres and cords, is bonded to a cured rubber composition by treating the textile material with an admixture in aqueous dispersion of an incompletely condensed phenolic resin, e.g. resorcinolformaldehyde, and a blend of (1) an aqueous dispersion of a copolymer of 50 to 90% by wt. of a conjugated diene monomer, examples of which are given, and (2) an aqueous dispersion of a polymer or copolymer of at least one conjugated diene monomer, e.g. a polybutadiene or butadiene/styrene latex, the blend containing from 0.2 to 10% by wt. of the unsaturated ketone based on the total polymer content of the blend, drying the treated textile material, coating the dry material with curable mono-olefine and/or diolefine rubber composition, and curing the rubber composition. The ratio by weight of phenolic resin to total polymer content of the blend may be from 1:9 to 9:1. The admixture of aqueous dispersions may have a total solids content of 5 to 30% by wt. The mono-olefine rubber may be a polymer or copolymer of at least one alpha mono olefine and also an interpolymer of at least 2 alpha mono olefines together with at least one additional compound serving to confere unsaturation on the uncured interpolymer. The compound which confers unsaturation, examples of which are given, may be a diene monomer and comprises up to 15 mole % of the interpolymer. The alpha mono olefines of the mono-olefine rubber, examples of which are given, preferably contain from 2 to 4 carbon atoms. The mono-olefine rubber may contain ethylene in an amount of from 40 to 80 mole % of the olefine content. The diolefine rubber may be natural rubber, and polymers and copolymers of at least one diolefinic compound, e.g. chloroprene. The textile material may be fibres and cords of rayon, cotton, polyamides, e.g. nylon, and polyesters, e.g. polyethylene glycol terephthalate. The polyester fibres may be given an initial treatment with a composition comprising polyvinyl chloride and a cross-linking agent, e.g. triallyl cyanurate, a polyamide resin, an isocyanate, polyethylene imine or with hexamethylene diethylene urea. The cords may be drawn through the latex, and embedded in the rubber composition.