Patent GB-1118724-A (GB)
Title: A process for the production of a coating composition
IPC: C08G18/62
Filed: 1965-06-22
Abstract: Coating pastes comprising vinyl chloride or vinyl fluoride polymers, plasticizers, conventional additives and 1 to 30% by weight of the paste of at least one normally solid butadiene/acrylonitrile copolymer are prepared by softening the copolymer in a part of the plasticizer and/or a volatile solvent and/or a liquid butadiene/acrylonitrile copolymer and subsequently adding the remaining components.  Specified plasticizers are phthalic, adipic, sebacic, azelaic and phosphoric acid esters, epoxidized oils, epoxidized fatty acid esters, and adipic, sebacic and suberic acid polyesters.  Other materials which may be present include dyes, pigments, fillers, stabilizers, lubricants, expanding agents, adhesion promoters such as organic polyisocyanates, and vulcanizing agents; and the pastes may be applied to flexible and porous substrates, e.g. textile fabrics, fleeces, paper and fibreboards, to give coated materials and leather substitutes.  Examples describe coating pastes comprising polyvinyl chloride, dioctyl phthalate, butadiene/acrylonitrile copolymers and (1) polypropylene glycol adipate, titanium dioxide, dibutyl tin laurate, triphenyl methane triisocyanate and methylene chloride; or titanium dioxide and dibutyl tin laurate; (2) epoxidized fatty acid ester, titanium dioxide, brown pigment and dibutyl tin laurate; or polypropylene glycol adipate, titanium dioxide, brown pigment and barium/cadmium laurate; (3) dioctyl adipate, titanium dioxide and dibutyl tin laurate; and (5) dioctyl adipate, kaolin and dibutyl tin laurate, together with (6) benzene and butanol.ALSO:Flexible and/or porous substrates e.g. of woven and knitted textile materials, fleeces, paper and fibreboard, are coated with pastes comprising a vinyl chloride or vinyl fluoride polymer, plasticisers, conventional additives and 1 to 30 per cent by weight of the paste of at least one normally solid butadiene/acrylonitrile copolymer.  The copolymer may comprise a high molecular weight solid copolymer and a low molecular weight liquid copolymer.  The pastes may be applied by roll, rubber blanket and knife coating and solidified by heating at 150 to 190 DEG C.  In examples (1) a cotton nettle cloth is coated with pastes comprising (a) polyvinyl chloride, dioctyl phthalate, polypropylene glycol adipate, butadiene/arylonitrile copolymers, titanium dioxide, dibutyl tin laurate triphenyl methane triisocyanate and methylene chloride, followed by (b) polyvinyl chloride, dioctylphthalate, butadiene/acrylonitrile copolymers, titanium dioxide and dibutyl tin laurate, and the gelled product embossed to give a leather substitute; (2) double tricot polyester cloth is coated with pastes comprising (a) polyvinyl chloride, dioctyl phthalate, epoxidised fatty acid esters, butadiene/acrylonitrile copolymers, titanium dioxide, brown pigment and dibutyl tin laurate, followed by (b) polyvinyl chloride, dioctyl phthalate, polypropylene glycol adipate, titanium dioxide, brown pigment and barium/cadmium laurate; and subsequently with a lacquer comprising polymethyl methacrylate and a vinyl chloride/vinyl acetate copolymer, the product being embossed to give a leather substitute; (3) cotton tricot cloth is coated on a rubber blanket coater with a paste comprising polyvinyl chloride, dioctyl phthalate, dioctyl adipate, p  butadiene/acrylonitrile copolymers, titanium dioxide and dibutyl tin laurate; (4) a stitched polyamide/cotton fibre fleece is coated with the pastes described under (2); (5) cotton tricot fabric and (6) cotton nettle cloth are coated with pastes comprising polyvinyl chloride, dioctyl phthalate, dioctyl adipate, butadiene/acrylonitrile copolymer kaolin and dibutyl tin laurate together with (6) benzine and butanol; and subsequently with the paste described under 2(b).