Fatty acid salt lubricant, preparation and application thereof

Abstract

The invention provides a fatty acid salt lubricant, preparation and application thereof. The preparation method comprises the following steps: adding higher fatty acid to an aqueous solution of an alkali compound to react; and then, adding a dispersing agent and an emulsifying agent into the solution to react so as to obtain an advanced fatty acid salt lubricant. The dispersing agent is selected from polyphosphate, polysilicate, polycarboxylate, polyacrylate or polyoxythylene fatty alcohol ether silicane; and the emulsifying agent is selected from polyoxyethylene fatty acid, polyethylene glycol fatty acid monoester, sorbitan fatty acid ester or polyoxyethylene-polyoxypropylene segmented copolymer. The fatty acid salt lubricant can be used for a lubricant of matt enamelled paper primary coat paint. Compared with the prior art, the fatty acid salt lubricant has the advantages of good stability, high solid content, low viscosity coefficient, small dosage, and the like. As the product is evenly dispersed in high-speed coating process of the paint, and has good fluidity and levelability.

Description

technical field [0001] The invention relates to a superfine high-grade fatty acid salt lubricant with high-grade fatty acid salt as raw material, its preparation method and application. technical background [0002] Advanced fatty acid salt lubricant is a water-insoluble metal soap surfactant, commonly known as SCD dispersion. Generally, it is made into a water-suspended dispersion with a weight concentration of about 50%, and is added to the paint at 0.5-5% of the absolute dry weight of the pigment, and its lubricating effect is also very obvious. [0003] High-grade fatty acid salt dispersions have been used as coating lubricants for coated paper in my country's paper industry as early as the early 1980s. At present, stearate lubricants are produced all over the country, but the solid content is basically 40~ Between 45%, the solid content is low. If the storage time is a little longer, the product will easily turn yellow, have peculiar smell, and be easy to delaminate. ...

AI Technical Summary

Problems solved by technology

[0004] U.S. Patent No. 4,676,836 uses anionic emulsifier as a lubricant component to prepare an anionic lubricant for coated paper with a solid content of 50-75%, but its viscosity is relatively high, with a maximum viscosity of 1700cps; and due to the use of a large amount of urea Solid content makes the product easy to turn yellow during storage, which brings problems such as sticking and cracking in the production of high-speed coated paper