Zinc dimethyldithiocarbamate pre-dispersed mother colloidal particle and preparation method thereof

The invention relates to a zinc dimethyldithiocarbamate pre-dispersed mother colloidal particle and a preparation method thereof. The pre-dispersed mother colloidal particle comprises, by weight, 70-85 parts of zinc dimethyldithiocarbamate powder, 5-20 parts of ethylene propylene rubber, 1-10 parts of a wetting agent and 1-10 parts of a softener. The invention also provides the preparation method of the pre-dispersed mother colloidal particle. The unique wetting agent is used in the invention to weaken static electricity of the zinc dimethyldithiocarbamate powder and reduce surface tension between the zinc dimethyldithiocarbamate powder and the rubber, so zinc dimethyldithiocarbamate and the ethylene propylene rubber compose a uniform compound, and the compound has good compatibility and excellent dispersibility in the rubber processing process, and can greatly shorten the mixing time in the use process.