Preparation method of bulk zinc stearate

Abstract

The invention provides a preparation method of bulk zinc stearate. The preparation method comprises the following steps: a. feeding stearic acid at normal pressure to a reaction kettle, heating up to 130-160 DEG C, then adding a catalyst and zinc oxide to the reaction kettle, and taking reaction for 80-120 minutes till reaching the molten state; b. adding an antioxidant, and stirring for 5-20 minutes; c. adding the molten zinc stearate prepared in the step b to a mold with a framework; d. cooling to obtain the required bulk zinc stearate with a certain shape. The preparation method disclosed by the invention is to add the molten zinc stearate prepared by the dry method to the framework to prepare the bulk zinc stearate, and cannot generate particles or microparticle dust in a processing workshop, so as to effectively improve the environment quality of the workshop, greatly reduce influence on health of workers in the workshop, and achieve a great promotional value and social significance.

Description

technical field [0001] The invention relates to the field of preparation of auxiliary materials, in particular to a method for preparing block zinc stearate. Background technique [0002] Zinc stearate, Chinese aliases: zinc octadecanoate, zinc octadecanoate, zinc stearate (light), zinc stearate, zinc fatty wax, zinc stearate, white light powder, Specific gravity 1.095, greasy feeling, insoluble in water, soluble in hot organic solvents such as ethanol, benzene and turpentine, decomposed into stearic acid and corresponding zinc salt in case of strong acid, this product is hygroscopic. [0003] Zinc stearate has a wide range of uses, common uses: as heat stabilizer, lubricant, grinding agent, accelerator, thickener, acid scavenger, etc. [0004] At present, the products on the market are usually in the form of powder, beads, and flakes. Powder products are generally used as abrasives for coatings, and beads and flakes are often used as lubricants and dispersants for modifie...

AI Technical Summary

Problems solved by technology

Although beads and flakes can currently meet the processing requirements of most modified plastics, filler masterbatches, and color masterbatches, the use of internal mixers for color masterbatches and filler masterbatches in the petrochemical polyolefin industry is harmful to the environment and process accuracy. A very demanding industry that cannot fully meet the requirements

[0005] For the production enterprises of zinc stearate, powder products and bead products still have certain potential safety hazards in dust production, and flake products are easy to be lumped during transportation, flakes are squeezed, etc., become small pieces and some fine powders, etc. Happening