High-performance de-foaming agent and preparation method thereof

Abstract

The invention discloses a high-performance de-foaming agent and a preparation method thereof. The high-performance de-foaming agent is prepared from following raw materials in parts by weight: 10-70 parts of mineral oil, 1-10 parts of white carbon black, 5-30 parts of modified silicon polyester, 1-5 parts of fatty acid amide type anionic surfactant, 1-3 parts of nano silicon dioxide and 100-400 parts of de-ionized water. The de-foaming agent can keep good foam elimination and inhibition effects under a lower concentration or a lower temperature and is suitable for eliminating a coating system containing styrene-acrylate, pure acrylic, ethyl acrylate, polyvinyl acetate and butylbenzene emulsion; the high-performance de-foaming agent is particularly used for eliminating foams in the coating system for a building; with regard to a transportation or long-period storage process of coatings, the high-performance de-foaming agent has good compatibility with the coatings so that the system has good stability; the high-performance de-foaming agent has the advantages of rapid de-foaming speed, rapid drying speed, less use amount and good performance for assisting film formation, and does not have the bad consequences of blocking an ultra-filtering film, generating fisheyes, shrinking holes and the like.

Description

technical field [0001] The invention relates to a high-performance defoamer, in particular to a high-performance defoamer for architectural coatings, and belongs to the technical field of fine chemicals. Background technique [0002] Many harmful foams produced in the industrial production process will cause raw materials to overflow, greatly limit the production capacity of equipment, cause waste of raw materials and products, prolong the reaction cycle, affect product quality, pollute the environment, cause accidents and other hazards. Therefore, in Defoamers need to be added during industrial production. [0003] Recently, the research on defoamers mainly focuses on the compounding of organosilicon compounds and surfactants, the compounding of polyether and silicone, the compounding of water-soluble or oil-soluble polyether and silicon-containing polyether, etc. In terms of agents, compounding is one of the development trends of defoamers. As far as the current defoamer...

AI Technical Summary

Problems solved by technology

After architectural coatings are used for construction, if the air bubbles cannot disappear during the film forming process, it will cause problems such as shrinkage cavities and pinholes in the coating film, which will affect the quality of the coating film and construction quality, and even bring safety hazards.