Patent GB-607604-A (GB)
Title: Bitumen treating composition
IPC: C08K5/20
Filed: 1945-08-30
Abstract: An agent for treating bituminous material for improving its adhesion to an aggregate such as broken stone, slag or sand in wet or dry condition, is prepared by reacting an alkylene polyamine, e.g. ethylene or propylene diamine, with a higher fatty acid such as oleic or ricinoleic acid, tall oil, or the like in the proportion of one mol. of amine to at least two of acid, and heating the product until water is evolved and an amido-amine soap results; an excess of acid may be present during the reaction so that the product contains free acid.  The agent may be formed by heating together equimolecular proportions of the fatty acid and polyamine until water is liberated, and further acid, in the proportion of 100 parts by weight to 5-20, and preferably 10-15, parts of the amine is added while heating to a temperature of 180 DEG  F.  The Specification as open to inspection under Sect. 91 comprises also the following features: (a) a surface-active amine, e.g. n-octadecyl, tetradecyl, or n-monodecyl amine is used as the starting-material; (b) for use when a cutback asphalt is not used, a product associated with water is used, this being prepared by heating to about 200 DEG  F. a mixture of 10-20 parts by weight of the product of the first reaction with 10 parts of commercial hydrochloric acid and sufficient water to give a total weight of 50-150 parts.  This subject-matter does not appear in the Specification accepted.ALSO:An agent for treating bituminous material for improving its adhesion to an aggregate such as broken stone, slag, or sand in wet or dry condition, is prepared by reacting a polyamine, e.g., ethylene or propylene diamine, with a higher fatty acid, such as oleic or ricinoleic acid, tall oil, or the like, in the proportion of one mol of amine to at least two of acid, and heating the product until water is evolved and an amido-amine soap results; an excess of acid may be present during the reaction so that the product contains free acid.  The bituminous material may be a natural asphalt, petroleum still residues, or heavy tars liquid at about 300 DEG F., and, preferably, a cut-back asphalt is used.  The agent is added to the bituminous material during heating to 250-350 DEG F. in the proportion of 0.5-3.0 parts to 100, and the product is then mixed with the aggregate; alternatively, the aggregate may first be coated with about 0.3-1 per cent of the agent by dissolving it in an organic solvent such as naphtha, benzol, or toluol, and the product then mixed with the bituminous material.  The Specification as open to inspection under Sect. 91 comprises also the following features: (a) octadecyl, tetradecyl, or monodecyl amine is employed as the amine; (b) in case a cut-back asphalt is not used, a reaction product associated with water is employed, this being prepared by reacting an amido-amine with dilute hydrochloric acid; (c) a bonding-material comprises an asphaltic substance containing an organic derivative of ammonia having at least one lipophilic radical attached to a nitrogen atom and an organic acid, e.g. a fatty acid, containing at least 8, and preferably 16 to 20 carbon atoms in the molecule; (d) the composition may be incorporated in paint.  This subject-matter does not appear in the Specification as accepted.