Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Aqueous continuous liquid phase and discontinuous phase...
Patent
1998-02-17
2000-01-11
Lovering, Richard D.
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Aqueous continuous liquid phase and discontinuous phase...
106277, 564473, B01J 1300, C08L 9500
Patent
active
060136812
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a liquid amine compound which can be applied to various uses such as emulsification for bitumens since it has as high of a surface activity as solid amines and has a much better workability as compared with the solid amines, and to uses of the above compound thereby to emulsify the bitumens.
Further, the present invention provides a process for producing an emulsifier for bitumens, in which an acid is added to a liquid amine compound obtained by reacting a specific aliphatic amine with a carbonyl compound to adjust the pH so as to be not more than 5.
DESCRIPTION OF THE RELATED ART
In cationic surfactants used as emulsifiers for bitumens, hydrochlorides of aliphatic amines have so far been used in the form of an aqueous solution, and those having linear alkyl groups having 12 to 22 carbon atoms have been known as industrially useful ones. Since these amine compounds have long linear alkyl groups, they are solid or pasty at room temperatures and difficult to handle when using them.
Efforts for liquefying these amine compounds have so far been made but they have involved the following problems.
For example, a method for oxyalkylating alkylamines and alkylpropylenediamines, described in U.S. Pat. No. 2,930,701 and French Patent 1,462,981, and a method for methylating secondary nitrogen, disclosed in U.S. Pat. No. 4,561,900, sacrifice considerably the interface active characteristics. That is, in various applications, more addition amounts are required as compared with those of raw material solid amines, or in the case of making use of them for a purpose of preparing emulsions, more greater mechanical energy is needed.
Further, it can be considered to dilute them into liquids by organic solvents. In this case, however, it is difficult to raise the amine concentration to 60% or higher even with the use of lower alcohols having the largest dissolution power, and therefore the considerably large amounts of the organic solvents have to be blended. In this case, it is apparent that the evaporation of the organic solvents exerts an adverse effect on the environment, and the adverse effects of the organic solvents may be exerted on the performances according to the use.
Further, it is described in U.S. Pat. No. 4,701,484 to use the reaction products of organic amine compounds primarily with unsaturated aldehydes (acrolein and the like) as aldehyde compounds as an anti-stripping additive (an agent for increasing an adhesion between aggregates and asphalt in a hot mix composition) for heated asphalt. However, the above reaction products are nothing but disclosed as the anti-stripping agent for heated asphalt, and descriptions in terms of emulsification of bitumens are not found at all.
SUMMARY OF THE INVENTION
Intensive investigations made by the present inventors in order to solve the problems described above have resulted in finding that the reaction of an aliphatic amine having at least one hydrocarbon group having not less than 8 carbon atoms with a carbonyl compound can liquefy the amine compound without damaging the interface activity and that this liquid amine compound is excellent as a component for an emulsifier for bitumens, and thus coming to complete the present invention.
That is, the present invention relates to use of a liquid amine compound prepared by reacting an aliphatic amine having at least one hydrocarbon group having not less than 8 carbon atoms with a carbonyl compound for an emulsifier of bitumens.
Further, the present invention relates to use of a liquid amine composition prepared by adding at least one compound selected from the group consisting of (a) organic acids, (b) alcohols and (c) phenols to a liquid amine compound prepared by reacting the aliphatic amine having at least one hydrocarbon group having not less than 8 carbon atoms with a carbonyl compound for an emulsifier of bitumens.
The present invention relates to a liquid amine compound for emulsifying bitumens which is prepared by reacting an aliphatic amine having at lea
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Asamori Katsuhiko
Funada Hitoshi
Hernandez Humberto Ramirez
Juarez Francisco Castaneda
Muniz Alvaro Gutierrez
Kao Corporation
Lovering Richard D.
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