Patent ES-331888-A1 (ES)
Title: Product and method of producing composite polyester textile rubber products
IPC: C08J5/04
Filed: 1966-10-04
Abstract: The adhesion of a synthetic polyester textile material to a vulcanizable rubber composition is improved by applying to the textile material a polymer containing groups in which R is hydrogen or a methyl or ethyl radical which is either oxidised to give at least one group and at least one group before applying the polymer to the textile material or is oxidised on the textile material by heating the coated textile material in an environment containing elemental oxygen or is oxidised both prior to and after application, and then applying to the textile material an adhesive composition comprising an elastomeric polymer and an aldehyde resin, combining the textile material with a vulcanizable rubber composition and then vulcanizing. The textile material may be a filament, fibre, thread, yarn, cord, cable or woven, non-woven or knitted fabric. The alkyleneimine polymer may be applied as a solution in water, methanol, ethanol, dioxane or acetone by dipping, brushing, spraying or roller coating, and the material then dried and heated, e.g. in an oven, by infrared radiation or contact with a heated surface, at 65 - 277 C, either relaxed or tensioned. When using lower molecular weight polyethylene polyamines having up to 8 carbon atoms e.g. diethylene triamine, triethylene tetramine or tetraethylene pentamine, these may be modified by reaction with organic compounds containing two or more groups, e.g. epoxy, carboxyl, acid chloride or isocyanate groups, reactive with the amino groups. The elastomer in the adhesive composition may be natural rubber or a synthetic polymer which may be prepared from butadiene, isoprene, 2-chlorobutadiene, 2, 3-dimethylbutadiene, piperylene or 2-fluorobutadiene alone or in admixture with styrene, vinyl toluene, alpha-methyl styrene, divinyl benzene, acrylonitrile methyl methacrylate, methacrylic acid, vinyl pyridine or methyl isopropenyl ketone or may be a copolymer of ethylene and propylene, a chlorosulphonyl polyethylene or an acrylate ester copolymer and the aldehyde resin may be a condensate of formaldehyde, acetaldehyde, benzaldehyde, glyoxal or furfural with a phenol, amine, amide, ketone or aromatic hydrocarbon. The adhesive composition may also contain an epoxy compound, e.g. vinyl cyclohexene dioxide, 2, 3, 5, 6-diepoxyoctane, epoxidized glycerol trioleate, epoxidized polybutadiene, epoxy ethers obtained by reacting epichlorohydrin or dichlorohydrin with a mono or polyhydric alcohol, and glycidyl ethers of mono or poly-hydricphenols, fillers, vulcanizing agents, accelerators, anti degradents and surface active agents, the constituents being dispersed in water or water containing ethyl alcohol, acetone or tetrahydrofuran. The textile material may be coated with the adhesive composition by dipping, roller coating or spraying with the material in a tensioned or relaxed condition, dried in an oven or by means of infra red radiation or contact with heated metal drums, the textile material preferably being heat set or heat stretched during the drying. The textile material is then incorporated into a vulcanizable rubber composition which may be the same as the elastomer used in the adhesive composition and then vulcanized.