Characteristics and application of organosilicon defoamer


In industrial production, bubbles are everywhere: machine grooves of all kinds of processing fluids; various industrial cleaning pools; all kinds of industrial and agricultural products and preparations; water treatment and other aspects of petrochemical production.


Foam brings many problems to industrial production: in order to prevent bubbles from overflowing, the feeding coefficient is forced to reduce 30%~ 50%; the spillover causes the waste of raw materials; the bubble occupies space, affects the reaction speed, and the production cycle is forced to prolong; the foam will affect the quality of products, such as coatings and plastic products; the generation of foam will affect the stability of industrial production, resulting in operational waves. The quality is unstable.


The most direct solution to the bubble problem is the use of defoamer. Whether they are silicone defoamer or other type of defoamer, their role is to solve the problem of foam.


Characteristics of Silicone Defoamer


Silicone defoamer is made of silicone oil as basic component, suitable solvent, emulsifier or inorganic filler through special process. As an excellent defoamer, the organosilicon defoamer has strong defoaming power. Especially valuable is that the siloxane has the characteristics of chemical stability, physiological inertia and high and low temperature performance, so it has been widely used.


It has strong anti-foaming and anti-foaming ability and low dosage.


It does not affect the basic properties of foaming system.


Good heat resistance, chemical stability, harmless, non-flammable, non-explosive.


Technical parameters of common organosilicon defoamers:


Model: (manufacturer's own number, no unified number)


Appearance: (milky white liquid)


PH value: (6.5-8.5)


Water solubility: (excellent water solubility and dispersibility)


Note: The values listed in this table only describe the typical properties of common organosilicon defoamers and do not represent the specifications.


Application occasions of organosilicon defoamer:


1. Textile size, high temperature dyeing;


2. Industrial water treatment;


3. Mud defoaming in oil exploitation;


4. waterborne coatings and other aqueous foam.


5. Other industries requiring anti-foaming time and fast defoaming.