process for the construction of a slab prefabricated from tiles joined together with a material termoadesivo on a soppor to

摘要

1468532 Laminated panels MANUFACTURE FRANCAISE DES CHAUSSURES ERAM 22 March 1974 [30 March 1973] 12767/74 Heading B5N A prefabricated panel is produced by placing a sheet of cardboard or pasteboard having a plurality of tiles previously adhered thereto in a mould, applied to the tile side of the assembly a thermo-self-adhesive joining mixture comprising 1-10% by weight of a substantially stoichiometric mixture of at least one epoxide resin and at least one product selected from phenolic resins, polyamides, polyamines, polyisocyanates, cyanoguanidines and acrylic resins and 10-50% by weight of polyvinyl chloride, polyvinyl chloride having vinyl acetate grafted thereon or nitrile rubber, the balance comprising a plasticizer, fire retardant, pigment or filler, covering the mixture with an asbestos-coated thermoplastic polyvinyl chloride sheet, closing the mould under pressure and maintaining the temperature of the mould at 150-185‹ C. for a period of 5-30 minutes while under pressure. The tiles may be of sandstone, earthenware, baked earth, glass, ceramic, glazed ceramic, aluminium or stainless steel. A preferred adhesive comprises polyvinyl chloride, dioetyl phthalate, dioctyl adipate, chlorinated paraffin, an antichlorine stabilizer, titanium oxide, a fire resistant filler, an epoxy resin produced by the reaction of a diphenol or bisphenol with epichlorhydrin and a phenolic resin. The interior of the mould may be rendered anti-adherent with a layer of a silicone or polytetrafluoroethylene. Heating and pressing may be effected in a heated press. After removal of the resultant assembly from the mould the sheet of cardboard or pasteboard may be removed by rubbing.