Patent GB-1098674-A (GB)
Title: Concrete coating
IPC: C08F283/01
Filed: 1965-03-12
Abstract: A concrete surface is coated by applying an alpha, beta unsaturated carboxylic acid primer and applying on the primed surface a thermosetting polyester resin composition.  A coating of finely divided, insert, abrasive particles may be spread over the polyester surface or included in the polyester composition. A list of acids is given.  Preferred acids are the alpha, beta unsaturated alkylene carboxylic acids of 3 to 5 carbon atoms such as acrylic, maleic and isocrotonic acids.  The acid may be applied to the concrete surface by spraying, brushing or rolling as a full strength acid or mixed with diluent such as a solvent e.g. acetone, styrene and/or a polyester resin.  Reagents for use in the preparation of the polyesters by reacting polycarboxylic acids, anhydrides acid halides and esters and adducts with polyhydric alcohols are listed.  The polyester resin composition may contain a liquid, polymerizable, monomer containing at least one olefinic bond as a diluent or solvent and which may be cured to a solid by copolymerization with the polymerizable components of the polyester.  A list of monomers is given.  The copolymerization may be catalysed e.g. with a peroxide catalyst or any catalyst capable of initiating vinylic cross linking such as peracids and azocatalysts.  The catalysts may be added pure or in solution in insert organic solvents such as the phthalate esters and cresyl phosphate esters.  A hydrocarbon wax may be employed in the polyester compositions, which can then be cured without application of heat from an external source.  The curing may be promoted by driers such as metal soaps, amines such as dibutyl amine, and mercaptans such as dodecyl mercaptan.  Reinforcing media may be added to the polyester compositions e.g. glass fibres, glass cloth, glass mats, glass roving, synthetic fibres of acrylonitrile or nylon, mineral fibres such as asbestos, natural fibres such as wool or cotton, metallic fibres such as aluminium or steel.  Fillers may be added such as calcium carbonate, clay, pigments such as zinc oxide, organic materials such as wood, flour, cotton, rayon, flock and dyes.  The polyester resins may be mixed mechanically with the monomeric polymerizable compound and the other ingredients added to the mixture.  The polyester resin-monomer-wax-drier compositions and the curing catalyst compositions as two separate packages may be mixed just before application to the concrete surface.  The curing catalyst may be sprayed on or otherwise added to the polyester resin-drier composition after application to the surface.  The abrasive particles may be sand, crushed rock, crushed quartz finely divided shells, aluminium oxide, finely divided resinous particles, glass particles and may be applied to the polyester coating with rollers, brushes, squeegees, brooms, sprayers, drippers.  The concrete surface may be treated to remove contaminants such as water, oil, grease, dirt and other substances that interfere with the resin-surface bond by e.g. washing with dilute acid, use of steel brushes, detergent solution, sand blasting, hipping and scouring. The compositions may be applied to concrete road and pavement surfaces, to provide flexible coatings skid-resistant, fire resistant, and resistant to wear and weathering.