End group type macromolecular quaternary ammonium salt and preparation method thereof

The invention discloses an end group type macromolecular quaternary ammonium salt and a preparation method thereof. Polyhydric alcohols and chlorinated carboxylic acid are dehydrated to produce a macromolecular skeleton in the presence of a catalyst and an appropriate solvent, and the prepared macromolecular skeleton is reacted with tertiary amine so as to obtain the end group type macromolecularquaternary ammonium salt. The macromolecular quaternary ammonium salt is novel in structure and low in toxicity, has strong bacteria inhibiting and resisting effects, and is capable of adjusting the structure according to needs so as to achieve corresponding physical properties. The macromolecular quaternary ammonium salt has wide application prospects in the fields of polymer emulsion, personal care, dry-film preservation, coatings, adhesives, household supplies and the like. The macromolecular quaternary ammonium salt disclosed by the invention is simple and controllable in preparation process, high in operability,