Patent GB-1073385-A (GB)
Title: Coating composition and method for sealing and coloring surfacing materials
IPC: E01C7/35
Filed: 1964-11-26
Abstract: A coating composition for sealing and colouring surfacing materials, e.g. roads, comprises (1) a surfacing aggregate whose particles are less than 10 mesh size; (2) a solid alkaline material whose particles are less than 200 mesh size; (3) pigment; (4) water; and (5) an aqueous emulsion comprising a mixture of substantially completely polymerized thermoplastic petroleum-derived hydrocarbon resin having a softening point range of from 220 DEG  to 300 DEG  F. and viscous oil selected from the group consisting of aromatic oil, naphthenic oil consisting essentially of a mixture of viscous alicyclic hydrocarbons and mixtures thereof. The surfacing aggregate may be sand, slag, crushed gravel and mixtures thereof and the alkaline material may be Portland cement, hydrated lime, limestone dust and mixtures thereof.  Lists of pigments are given.  The resin employed is preferably a substantially completely polymerized aromatic thermoplastic hydrocarbon resin produced by polymerization of unsaturated petroleum fractions, e.g. by polymerization of "dripolene", the resin having a softening point as above, a mixed aniline point of from 20 DEG  to 60 DEG  C., an iodine number of from 40 to 160, an acid number of from 0 to 4 and a molecular weight of from 600 to 1700. The preferred aromatic oils have viscosities of from 120 to 300 S.S.U. at 210 DEG  F. and aniline points of from 20 DEG  to 60 DEG  C. and the preferred naphthenic oils have viscosities of from 40 to 200 S.S.U. at 210 DEG  F. and aniline points of from 50 DEG  to 150 DEG  C.  An emulsifier for the resin and oil mixture is preferably used and it may be of the cationic, anionic or nonionic type. Natural and synthetic rubbers may be incorporated into the resin and oil mixture in the emulsion, the rubber preferably being in the form of crumbs, pellets or beads.ALSO:Surfacing materials, e.g. roads may be sealed and coloured by applying to the surface a coating composition comprising: (1) a surfacing aggregate whose particles are less than 10 mesh size; (2) a solid alkaline material whose particles are less than 200 mesh size; (3) pigment; (4) water and (5) an aqueous emulsion comprising a mixture of substantially completely polymerized thermoplastic petroleum-derived hydrocarbon resin having a softening point range of 220 DEG  to 300 DEG F., and a viscous oil selected from aromatic oil, naphthenic oil consisting essentially of a mixture of viscous alicyclic hydrocarbons, and mixtures thereof. The surfacing aggregate may be sand, slag, crushed gravel and mixtures thereof and the alkaline material may be Portland cement, hydrated lime, limestone dust and mixtures thereof.  The resin employed is preferably produced by the polymerization of "dripolene", the resin having a molecular weight of 600 to 1700.  Natural and synthetic rubbers may be incorporated into the resin and oil mixture in the emulsion, the rubber preferably being in the form of crumbs, pellets or beads. In the examples coating compositions of varying colours are applied, the preferred thickness of coating being 1/16 to 1/2 inch.