Patent GB-889113-A (GB)
Title: New coating composition, its manufacturing process and applications
IPC: B32B27/00
Filed: 1958-02-26
Abstract: A curable coating or moulding composition consists of a synthetic material which will polymerize to a three-dimensional molecular lattice, an inert filler, spherical filling bodies and pigments.  The synthetic material may be an unsaturated polyester or epoxy resin, together with cross-linking agents and catalysts.  The filler is preferably a thixotrope.  The one specified is colloidal silica.  The spherical filling bodies specified are glass beads.  The compositions may be applied to building surfaces or to objects such as vases, glasses, plates, terra-cotta or glass basins, or to concrete.  It is applied manually or mechanically.  The surface to be coated may first be coated with synthetic material.  The coating may be given any desired profile or relief pattern, e.g. with a malleable moulding plate or may be provided with incrustations.  The hardened coating may be finished, e.g. by milling or grinding.  Specifications 641,547 and 704,640 are referred to.ALSO:A curable composition consists of a synthetic material which will polymerize to form a three-dimensional molecular lattice in admixture with an inert filler, spherical filling bodies and pigments.  The filler specified is colloidal silica and the spherical filling bodies specified are glass beads. Synthetic materials referred to are unsaturated polyesters or epoxy resins, cross-linking agents and curing catalysts.  Cross-linking agents for the polyesters are styrene, vinyl acetate, vinyl toluene, acrylonitrile, methacrylates and allyl esters, e.g. triallyl cyanurate.  Catalysts for the polyesters are peroxides in combination with activators such as cobalt naphthenate.  The polyesters may be copolymerized with polyglycol maleate, styrene, vinyl toluene, triallyl cyamerate or methacrylates.  Suitable polyester resins are known as "Lamellone", "St. Gobain", and "Para-plex" (Registered Trade Marks).  Epoxy resins may be copolymerized with dibasic acid anhydrides or polyamines.  A suitable epoxy resin is "Araldite" (Registered Trade Mark).  The compositions may be applied to building or other surfaces manually or mechanically.  The surface may receive a first coat of synthetic material.  The coating may be given any desired profile or relief pattern, e.g. with a malleable moulding plate, or may be provided with incrustations.  The hardened coating may be finished, e.g. by milling or grinding.  The specific example given of a composition according to the invention contains polyesters and catalyst, colloidal silica, glass beads and pigments.  The material according to the invention may be poured into a rigid, or non-rigid, e.g. polythene mould.  The spherical filling bodies sink to the bottom and the fluid mass gels.  A support such as a concrete flag-stone is covered with a syrupy layer of the same polymerizable material which may be differently coloured from the material in the mould.  The flagstone is then joined to the contents of the mould and the whole assembly left to polymerize after which the mould is removed.  Coatings may be applied to supports, e.g. of paraffin, plasticine or wax which may after hardening of the coating be removed, e.g. by heating.  Fragile objects, e.g. vases or basins of plaster, terra-cotta or glass may be strengthened by the coatings and statuary in the rough may be rendered more lasting and weatherproof. Specifications 641,547 and 704,640 are referred to.