Method for preparing polyisobutylene succinic acid triethanolamine ester

The present invention discloses a method for preparing polyisobutylene succinic acid triethanolamine ester. The method comprises: mixing PIBSA and triethanolamine according to a certain ratio, heating, and carrying out a vacuum pumping reaction so as to obtain the polyisobutylene succinic acid triethanolamine ester after completing the reaction. Compared with the method in the prior art, the method of the present invention has the following significant advantages that: (1) the solvent does not exist in the technical scheme of the present invention so as to reduce the raw material cost and the product post-treatment; (2) the emulsibility of the synthesized product is increased; (3) the steps of the method are simple, and the target product can be synthesized only through the one step so as to effectively avoid the product loss caused by step increase and substantially increase the target product yield; and (4) the operation of the experimental scheme is safe, and the method is suitable for multi-batch and larg