Patent GB-1348381-A (GB)
Title: Decorative surfaces
IPC: C04B41/53
Filed: 1971-04-19
Abstract: 1348381 Coating IMPERIAL CHEMICAL INDUSTRIES Ltd 19 April 1971 [18 March 1970 11 Aug 1970 21 Dec 1970] 13041/70 38631/70 and 61328/70 Addition to 1192864 Heading B2E [Also in Divisions B5 Cl and C3] Decorative surfaces are produced by applying to an area to be surfaced a composition having as essential ingredients a hydraulic cement, a filler in the form of fragments or coarse particles, water and an organic polyisocyanate, allowing the composition to harden and then grinding or otherwise treating the surface of the composition to expose the fragments or particles of filler. The filler may be in the form of mass-pigmented plastics fragments of thermoplastic or thermo-setting polymers or copolymers, e.g. nylon, polyvinyl chloride, vinyl chloride-vinyl acetate copolymers, urea-formaldehyde polymers, phenolformaldehyde polymers, melamine-formaldehyde polymers, acetal polymers and copolymers, acrylic polymers and copolymers, acrylonitrile - butadiene - styrene terpolymers, cellulose acetate, cellulose acetate butyrate, polycarbonates, polyethylene terephthalates, polystyrenes, polyurethanes, which may be used include colourless or coloured glass fragments, naturally coloured or artificially coloured stone fragments or aggregate. The hydraulic cement may be selected from Portland cement, rapid hardening cement, low-heat cement, sulphate resisting cements, Portland blast furnace cement, masonry cements, natural cements, lime cements, selenitic cement, pozzolanic cement and calcium sulphate cements. Examples of polyisocyanates are given. Preferably an isocyanate-reactive organic compound is also present, preferably dihydric or trihydric polyether having an equivalent weight of 100-1,500 or the products obtained by high temperature reaction between castor oil and hard resins obtained by heating castor oil with a resin which is a rosinate of a metal selected from Group 2a of the Periodic Table or a condensation product of rosin with (1) at least one polyhydric alcohol or (2) at least one polyhydric alcohol and at least one optionally substituted phenol - formaldehyde resol resin, or (3) at least one polyhydric alcohol and at least one alpha, beta-unsaturated dicarboxylic acid or the anhydride thereof. Examples of polyhydric alcohols are glycerol, pentaerythritol, trimethylolpropane and sorbitol. Examples of alpha, beta-unsaturated dicarboxylic acids are maleic, fumaric acid and maleic anhydride. The castor oil and resin may be used in the proportion 99-1 to 1-99 parts by weight. The compositions may also contain pigments, fine sand preferably not exceeding 25 times the weight of fragmentary or coarse particles, bitumen. The composition may comprise per 100 parts by weight of cement, 5-900 parts of the filler, 10-75 parts by weight of water, 5-5,000 parts by weight of organic polyisocyanate plus organic polyfunctional isocyanate-reactive compound and 0-200 parts by weight of solvents. The compositions may be applied to curved or inclined surfaces as well as flooring and may also be used to manufacture decorative tiles either by casting and surfacing individual tiles or by cutting up a large area of hardened compositions into tile-sized pieces. There may be applied to the ground surface of the composition one or more coats of a urethane surface-coating composition. In an Example 100 parts Portland cement, 20 parts oxypropylated glycerol having a molecular weight 1,000, 8 parts oxypropylated triethanolamine having a molecular weight 320, 30 parts of a triple roll mill base consisting of 20 parts titanium dioxide and 10 parts of polyester resin (prepared from hexane triol, 1, 3- butane diol and adipic acid), 25 parts water and 136 parts mixed red and blue mass pigmented nylon 6, 6-polymer chips (1/4 inch diameter) are all mixed together and 100 parts of 70% solution of a polyisocyanate (obtained by heating a mixture of tolylene diisocyanate, trimethylol propane and butylene glycol for 2 hours at 60C. in the presence of half their combined weight of a 1-1 mixture of betaethoxyethyl acetate and xylene, adding an oxypropylated glycerol of molecular weight 3,000 and heating continued for 4 hours at 60C.) are added with further mixing. The mixture is then poured out and spread into a layer. After curing overnight the layer was ground flat and smooth to expose the coloured plastics chips.