Patent GB-832629-A (GB)
Title: Improvements in or relating to the coating of articles with polyvinyl chloride compositions
IPC: B05D1/36
Filed: 1956-05-15
Abstract: A dispersion of polyvinyl chloride in a plasticizer therefor is applied over a layer of a polyisocyanate adhesive composition on the surface of an article, and gelled by the application of heat without the use of pressure.  The adhesive composition may be applied as a solution in an organic liquid by brushing, spreading or spraying and after evaporation of the solvent the dispersion is applied by spreading or trowelling, or by applying to a mould, e.g. an aluminium-foil mould lubricated with a silicone oil and applying the coated mould to the article, or by applying the dispersion to the article and then applying the mould to the coated article followed in each case by heating.  The dispersion may contain, in addition to polyvinyl chloride, minor amounts of co-polymerized vinyl acetate, vinylidene chloride, or styrene, plasticizers such as tri-cresyl phosphate, dioctyl phthalate, or polypropylene adipate or sebacate, fillers such as calcium or lead carbonate or barytes, pigments such as titanium dioxide or phthalocyanine blue and stabilizers such as lead stearate or epoxidized oils.  The polyisocyanate adhesive composition may contain, as well as organic di- or tri-isocyanates, synthetic rubbers such as butadiene-acrylonitrile, or polyvinyl chloride, or co-polymers of vinyl chloride with minor amounts of vinylidene chloride, vinyl acetate or styrene, or mixtures of such rubbers and such polymers.  The coating may be applied to natural or synthetic rubber, including sponge rubber, polyurethane, leather, wood, metal, cardboard or hardboard.  Specification 832,629 is referred to.ALSO:A dispersion of polyvinyl chloride in a plasticizer therefor is applied over a layer of a polyisocyanate adhesive composition on the surface of an article, and gelled by the application of heat without the use of pressure.  The adhesive composition may be applied as a solution in an organic liquid by brushing, spreading or spraying and after evaporation of the solvent the dispersion is applied by spreading or trowelling, or by applying to a mould, e.g. an aluminium-foil mould lubricated with a silicone oil and applying the coated mould to the article, or by applying the dispersion to the article and then applying the mould to the coated article followed in each case by heating.  The dispersion may contain, in addition to polyvinyl chloride, minor amounts of copolymerized vinyl acetate, vinylidene chloride, or styrene, plasticizers such as tri-cresyl phosphate, dioctyl phthalate, or polypropylene adipate or sebacate, fillers such as calcium or lead carbonate or barytes, pigments such as titanium dioxide or phthalocyanine blue and stabilizers such as lead stearate or epoxidized oils.  The polyisocyanate adhesive composition may contain, as well as organic di- or tri-isocyanates, synthetic rubbers such as butadiene-acrylonitrile, or polyvinyl chloride, or co-polymers of vinyl chloride with minor amounts of vinylidene chloride, vinyl acetate or styrene, or mixtures of such rubbers and such polymers.  The coating may be applied to natural or synthetic rubber, including sponge rubber, polyurethane, leather, wood, metal, cardboard or hardboard.  Specification 832,628 is referred to.ALSO:A dispersion of polyvinyl chloride in a plasticizer therefor is applied over a layer of a polyisocyanate adhesive composition on the surface of an article, and gelled by the application of heat without the use of pressure.  The adhesive composition may be applied by applying to a mould, e.g. an aluminium-foil mould lubricated with a silicone oil and applying the coated mould to the article, or by applying the dispersion to the article and then applying the mould to the coated article followed in each case by heating.  The dispersion may contain, in addition to polyvinyl chloride, minor amounts of co-polymerised vinyl acetate, vinylidene chloride, or styrene, plasticizers such as tricresyl phosphate, dioctyl phthalate, or polypropylene adipate or sebacate, fillers such as calcium or lead carbonate or barytes, pigments such as titanium dioxide or phthalocyanine blue and stabilizers such as lead stearate or epoxidised oils.  The polyisocyanate adhesive composition may contain, as well as organic di- or tri-isocyanates, synthetic rubbers such as butadiene-acrylonitrile, or polyvinyl chloride, or co-polymers of vinyl chloride with minor amounts of vinylidene chloride, vinyl acetate or styrene, or mixtures of such rubbers and such polymers. The coating may be applied to natural or synthetic rubber, including sponge rubber, polyurethane, leather, wood, metal, cardboard or hardboard.  Specification 832,628 is referred to.