Synthesis method of dimer acid emulsifier

Abstract

The invention discloses a synthesis method of a dimer acid emulsifier, the synthesis method comprises the following steps: (1) adding dimer acid into a reactor, stirring and heating to 80 DEG C, and starting a vacuum pump; (2) adding polyol and a catalyst solution, continuously heating to 150-190 DEG C, stirring and reacting for 2-5 hours, and controlling the heating speed at 20-30 DEG C / h to obtain an intermediate containing a lipid group; (3) cooling the intermediate containing the lipid group in the step (2) to 120 DEG C, adding a diluent, then adding polyamine or alcohol amine, controlling the temperature to be 120-180 DEG C for reaction, stirring and reacting for 1-2 hours in a vacuum state, controlling the heating speed to be 10-20 DEG C / h, and stopping the reaction after all water generated by the reaction is evaporated; and (4) cooling and discharging to obtain the emulsifier with the content of 70% or above. The emulsifier is used for industrial colloidal explosives, the emulsibility in the product preparation process is greatly improved, the emulsifier can be smoothly emulsified under the condition that the stirring strength in the emulsion preparation process is reduced, the emulsifier has a certain self-emulsifying function, and the stability of colloid is greatly improved after the emulsification is finished.

Description

technical field

[0001] The invention relates to a method for preparing an emulsifier, in particular to a method for synthesizing a dimer acid emulsifier. Background technique

[0002] Dimer acid is a dibasic acid produced by the addition polymerization of two molecules of C8 unsaturated fatty acids, such as oleic acid and linoleic acid. It contains two polar carboxyl groups and a large non-polar hydrocarbon group. Its chemical The properties are similar to fatty acids. The molecule contains two carboxyl groups, which can undergo various reactions such as lipidation and amination. There are relatively large alkyl groups and 1-3 double bonds in the molecule, which can undergo chemical reactions such as addition and polymerization. . Dimer acid is generally used in the fields of resins, cosmetics, and lubricating oils. The emulsifier currently used in industrial colloidal explosives is S-80 or polyisobutylene succinimide polymer emulsifier (the former has poor stability and t...