Patent GB-1112577-A (GB)
Title: Bonding textiles to rubbers
Inventor: OSBORNE ALAN PAUL
IPC: C08J5/06
Filed: 1964-08-20
Abstract: A composition suitable for use in the bonding of textile materials to mono-olefine and/or diolefine rubbers comprises an admixture of an aqueous dispersion of an incompletely condensed phenolic resin, e.g. a resorcinol formaldehyde condensate, and an aqueous polymer dispersion comprising a copolymer of a conjugated diene monomer and acrylonitrile, the polymer dispersion containing 1-15% by weight of the acrylonitrile based on the total polymer content of the dispersion.  The conjugated diene monomer copolymerized with the acrylonitrile may be butadiene-1,3, 2,3-dimethyl butadiene-1,3, 2-methyl butadiene-1,3, piperylene, 1 - phenyl butadiene - 1,3, 2 - phenyl butadiene - 1,3 or 2 neopentyl butadiene-1,3. A blend comprising a copolymer of a conjugated diene monomer and acrylonitrile having a high acrylonitrile content blended with a latex of a homopolymer or copolymer of a conjugated diene, e.g. polybutadiene or a butadiene/styrene copolymer, in an amount such that the acrylonitrile content of the total polymer dispersion is 1-15% by weight may be used.ALSO:Textile materials, e.g. viscose rayon, cotton, nylon and polyethylene glycol terephthalate fibres, are bonded to mono-olefine and/or diolefine rubbers by treating them with an adhesive composition comprising an admixture of an aqueous dispersion of an incompletely condensed phenolic resin, e.g. a resorcinol formaldehyde condensate, and an aqueous polymer dispersion comprising a copolymer of a conjugated diene monomer and acrylonitrile, the polymer dispersion containing 1-15% by weight of the acrylonitrile based on the total polymer content of the dispersion, drying the treated materials, coating them with a curable mono-olefine and/or diolefine rubber composition, and heating to cure the rubber composition.  The conjugated diene monomer copolymerized with the acrylonitrile may be butadiene-1, 3, 2, 3-dimethyl butadiene-1, 3, 2-methyl butadiene-1, 3, piperylene, 1-phenyl butadiene-1, 3, 2-phenyl butadiene-1, 3 or 2 neopentyl butadiene-1, 3.  A blend comprising a copolymer of a conjugated diene monomer and acrylonitrile having a high acrylonitrile content blended with a latex of a homo-polymer or copolymer of a conjugated diene, e.g. polybutadiene or a butadiene/styrene copolymer, in an amount such that the acrylonitrile content of the total polymer dispersion is 1-15% by weight may be used.  The monoolefine rubber which is a homopolymer or copolymer of at least one alpha-mono-olefine, e.g. ethylene, propylene, butylene, pentene-1, heptene-1 and octene-1, or an interpolymer of at least two alpha-mono-olefines with at least one additional compound serving to confer unsaturation on the uncured interpolymer, e.g. butadiene, isoprene, piperylene, dimethylbutadiene, hexadienes and cyclopentadiene, may contain reinforcing agents, e.g. carbon black, plasticizers, antioxidants and fillers, and may be cured by means of organic peresters or peroxides, e.g. dicumyl peroxide, with or without the addition of a small amount of sulphur.  The diolefine rubber may be natural rubber, cis-polybutadiene or a blend of natural rubber and a butadiene/styrene copolymer.  The adhesion of polyester fibres to rubbers may be improved by first treating the fibres with a composition comprising polyvinyl chloride and a cross-linking agent, e.g. triallyl cyanurate, or a polyamide resin with an isocyanate, polyethylene imine or N, N'-hexamethylene-bis-1-aziridine carboxamide.