Special organic silicon defoamer for coatings

一种涂料专用有机硅消泡剂

Abstract

The invention discloses a special organic silicon defoamer for coatings. The special organic silicon defoamer contains the following components in percentage by weight: 10%-20% of modified siloxane, 10%-15% of modified polyether, 15%-25% of organic silicon resin, 30%-50% of organic silicon fluid, 5%-20% of white carbon black, 3%-5% of an emulsifying agent, 1%-5% of a surfactant and 0.1%-0.2% of a catalyst, wherein the molecular weight of the organic silicon resin is 10000-50000, and the viscosity of the organic silicon fluid is 5000-1500000 centipoises. The special organic silicon defoamer is a polysiloxane-polyether copolymer emulsion type defoamer, is mainly used for eliminating foams in the production process of water-based emulsion paint and is particularly suitable for eliminating foams in emulsions such as a styrene acrylic emulsion, a pure acrylic emulsion and a vinyl acetate emulsion. The special organic silicon defoamer has the advantages of low use amount, high defoaming speed and long foam inhibition time and can be further used for eliminating foams in the production processes of products such as water-based ink, water-diluted resin, water-based epoxy resin, water-based color paste and sizing agents.
本发明公开一种涂料专用有机硅消泡剂,按重量百分比计,包括:改性硅氧烷10‑20%;改性聚10‑15%;有机硅树脂15‑25%;有机硅流体30‑50%;白炭黑5‑20%;乳化剂3‑5%;表面活性剂1‑5%;催化剂0.1‑0.2%。其中有机硅树脂分子量在10000‑50000之间,有机硅流体黏度为5000‑1500000厘泊。本发明的消泡剂是以聚硅氧烷—聚醚共聚物乳液型消泡剂,主要用于消除生产水性乳胶漆过程中的泡沫,特别适用于苯丙、纯丙乳液、醋酸乙烯等乳液中的消泡。具有用量少、消泡快、抑泡时间长的优点,还可以用于水性油墨、水稀释性树脂、水性环氧树脂,水性色浆、浆料等产品生产过程中消泡。

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