Patent GB-597739-A (GB)
Title: Bituminous composition
IPC: C08L95/00
Filed: 1945-08-30
Abstract: An anhydrous bituminous composition, particularly for incorporation with a wet stony aggregate in the preparation of paving-compositions, comprises an asphaltic material such as natural asphalt, petroleum still residues, or residues from coal-tar distillation, a water-insoluble soap, and an amide of a higher fatty acid constituting an emulsifying-agent adapted to cause formation of water-in-oil emulsions.  The soap is preferably prepared from zinc oxide and tall oil, but soaps of oleic acid, ricinoleic acid, linoleic acid, or the acids resulting from the hydrolysis of cottonseed oil, corn oil, or fish oil, and aluminium, iron, calcium or other multivalent metal may be used. Preferably the oxide is in excess of that needed for neutralising the acid.  An amide of tall oil, oleic, palmitic, lauric, or stearic acid, particularly oleamide, or an oxyalkyl amide is used. A compound containing an amine group in addition to a higher fatty acid radical can be included, e.g., ethylene diamine, diethylene triamine, tri-ethylene pentamine, or other polyamine reacted with insufficient fatty acid to neutralize all the amine groups.  The amide and amine must be liquid at the pouring-temperature of the composition.  The amide is present in the ratio of 1-8 to 100 parts of the soap, and 0.5-5 parts of the mixed soap and emulsifier are added to 100 parts of the bitumen, the bitumen being heated and, if desired, used with a cut back solvent. The aggregate is preferably preliminarily treated with 0.5-1 part of hydrated lime to 100 parts of the aggregate.ALSO:An anhydrous bituminous composition, particularly for incorporation with a wet stony aggregate in the preparation of paving compositions, comprises an asphaltic material such as natural asphalt, petroleum still residues, or residues from coal-tar distillation, a water-insoluble soap, and an amide of a higher fatty acid constituting an emulsifying-agent adapted to cause formation of water-in-oil emulsions.  The soap is preferably prepared from zinc oxide and tall oil, but soaps of oleic acid, ricinoleic acid, linoleic acid, or the acids resulting from the hydrolysis of cottonseed oil, corn oil, or fish oil, and aluminium, iron, calcium or other multivalent metal may be used. Preferably the oxide is in excess of that needed for neutralizing the acid.  An amide of tall oil, oleic, palmitic, lauric, or stearic acid, particularly oleamide, or an oxyalkyl amide is used. A compound containing an amine group in addition to a higher fatty acid radical can be included, e.g., ethylene diamine, diethylene triamine, triethylene pentamine, or other polyamine reacted with insufficient fatty acid to neutralize all the amine groups.  The amide and amine must be liquid at the pouring-temperature of the composition.  The amide is present in the ratio of 1-8 to 100 parts of the soap, and 0.5-5 parts of the mixed soap and emulsifier are added to 100 parts of the bitumen, the bitumen being heated and if desired, used with a cut back solvent. The aggregate is preferably preliminarily treated with 0.5-1 part of hydrated lime to 100 parts of the aggregate.  The Specification as open to inspection under Sect. 91 states that the emulsifiers may be omitted.  This subject-matter does not appear in the Specification as accepted.