Coating additive and preparation method and using method thereof

Abstract

The invention relates to a coating additive. The coating additive is prepared from the following components in percentage by weight: 12-18% of aluminium-magnesium silicate, 2-5% of white carbon black,0.5-0.8% of PVB, 4-7% of phenolic resin powder, 3-5% of maleated rosin powder, 4-8% of attapulgite, 1-2% of sodium hexametaphosphate, 4-8% of organobentonite, 10-15% of spodumene, 15-20% of mica powder, 15-20% of anhydrous sodium sulphate and 6-10% of a dispersing agent. A preparation method of the coating additive comprises the following steps that all the components are mixed according to the weight percentage, stirring is conducted for 10-15 minutes by a spiral rod stirrer, and after even stirring, the powdery coating additive is obtained; and during using, aggregate and a solvent only need to be added into the coating additive, stirring is conducted for at least 20 min by a high-speed dispersion machine, and thus the coating additive can be applied. Compared with the prior art, the coating additive is easy to produce and convenient to package and transport, and all aspects of performance of casting coating made of the coating additive is superior.

Description

[technical field] [0001] The invention relates to the field of materials, in particular to a coating additive and its preparation method and use method. [Background technique] [0002] China is a big foundry country, and casting coatings are the most important casting auxiliary materials related to the quality of castings. Due to the continuous strictness of national environmental protection policies this year, the alcohol-based casting coatings that were commonly used in the past are becoming more and more difficult to operate from production to transportation. In addition, alcohol-based casting coatings are flammable and explosive chemical dangerous goods because the alcohol content exceeds 20%. Production must have a dangerous goods production license, and transportation must be carried out by special vehicles for dangerous goods, which greatly increases the threshold and use costs. . [Content of the invention] [0003] The object of the present invention is to solve t...

AI Technical Summary

Problems solved by technology

[0002] China is a big foundry country. Casting coatings are the most important casting auxiliary materials related to the quality of castings. Due to the continuous strictness of national environmental protection policies this year, the alcohol-based casting coatings that were commonly used in the past are becoming more and more difficult to operate from production to transportation.

In addition, alcohol-based casting coatings are flammable and explosive chemical dangerous goods because the alcohol content exceeds 20%. Production must have a dangerous goods production license, and transportation must be carried out by special vehicles for dangerous goods, which greatly increases the threshold and use costs.