Patent GB-958119-A (GB)
Title: Adhesive coating compositions and their use
Inventor: AITKEN ROGER GORDON
IPC: C08J5/06
Filed: 1960-03-15
Abstract: An adhesive coating composition for fibre-forming polyesters derived from terephthalic acid comprises a major proportion of a natural or synthetic rubber latex adhesive dispersion in a phenolic substance and formaldehyde which has been allowed to age and a minor proportion of a compatible modifier selected from the group of anionic dispersions of polymers consisting of homopolymers or copolymers of vinyl halide and vinylidene halides. Preferred dispersions are those of vinyl pyridine copolymer latex in an aqueous solution of resorcinol and formaldehyde adjusted to pH 9.0 and allowed to age. The latex may also be of butadiene-styrene rubber or butyl sulphur while phenol or catechol may be the phenolic substance. Copolymers specified are those of vinyl chloride with vinyl acetate, vinylidene chloride acrylonitrile, or a mixture of vinylacetate and maleic anhydride and vinylidene chloride-acrylonitrile copolymer.  There may also be present tertiary amines e.g. ethyl morpholine or compounds yielding such an amine, and the usual compounding ingredients particularly dithiocarbamates. The adhesive coating composition is applied to fibrous material made from a polyester derived from terephthalic acid and the treated fibres bonded to rubber. The coating composition may be applied to the fibrous material by dipping (preferred) spraying or brushing and then heating. In examples tyre cord made by spinning a 48-filament yarn of the polyester derived from terephthalic acid and ethylene glycol, drawing the yarn and then doubling into a cord as (1) and (2) dipped into a solution containing polyvinyl pyridine latex, water, resorcinol and formaldehyde which has had its pH adjusted to 9 and has been aged before a polyvinyl chloride emulsion was added and the dipped cord heated for 4 minutes at 220 DEG C. after which the cord is embedded in butadiene-styrene tyre carcass stock by vulcanisation, (3) treated as before but an accelerator dispersion is added to the cured latex dispersion, and (4) treated as in (1) and (2) but the rubber latex adhesive also has added thereto an aqueous solution of sodium dibutyl dithio-carbamate. Specification 867,187 is referred to.ALSO:Fibrous material made from a polyester derived from terephthalic acid is bonded to rubber by a composition comprising a major proportion of a natural or synthetic rubber latex adhesive dispersion in a phenolic substance and formaldehyde, which has been allowed to age and a minor proportion of a compatible modifier selected from the group of anionic dispersions of polymers consisting of homopolymers and copolymers of vinyl halide and vinylidene halide (see Division C3).  The coating composition may be applied to the fibrous material by differing (preferred), spraying or brushing and then heating.  In examples tyre cord made by spinning a 48-filament yarn of the polyester derived from terephthalic acid and ethylene clycol, drawing the yarn, twisting four such yarns on to a ply yarn and then doubling on to a cord is (1) and (2) dipped into a solution containing polyvinylpyrdine latex water, resorcinol and formaldehyde which has had its pH adjusted to 9 and had been aged before a polyvinyl chloride emulsion was added and the dipped cord heated for 4 mins. at 220 DEG C. after which the cord is embedded in butadiene styrene tyre carcass stock by vulcanisation (3) treated as before but an accelerator dispersion is added to the cured latex dispersion and (4) treated as in (1) and (2) but the rubber latex adhesive also added thereto an aqueous solution of sodium dibutyl dithiocarbamate.  Specification 867,187 is referred to.