Chinese name: 橡胶消泡剂
Foreign name: Rubber defoamer
Also known as: rubber moisture absorbent, rubber vulcanization defoamer
Precautions: Avoid contact with acids, water vapor or liquid water
Main ingredient: calcium oxide
Product classification: Ⅰ, Ⅱ, Ⅲ
Usage: as compounding agent in rubber and some rubber and plastic products
Physical and chemical properties
It is divided into three types: I, II, and III. Type Ⅰ defoamer is pure white powder;
Type II defoamer is yellowish or white powder;
Type III defoamer is light yellow or light gray paste-like solid.
The main components of the three defoamers are calcium oxide, and all contain organic matter, which has strong water absorption, and generates calcium hydroxide after the reaction.
The surfaces of the three product particles are coated with one or several organic substances to form a protective film, which acts as a passivation protection for the main components to prevent premature hydration. These organic substances play a certain dispersing role in the rubber to make it evenly dispersed.