In textile printing and dyeing, the application of silicone emulsion defoamer can make the color more uniform and dye more permeable.
It is prepared by a high shear emulsifier, with silicone oil as the substrate, with a certain proportion of solvents, emulsifiers or inorganic fillers through a specific process.
It has strong removing and defoaming power and is widely used.
The first step is the preparation of the silicone paste.
A certain amount of polydimethylsiloxane with different viscosity (hereinafter referred to as silicone oil), activated silica, modifier and catalyst were stirred at 120 ~ 210℃ for 2 ~ 4h. After cooling, the main defoaming component was mixed with silicon cream.
Adding emulsifier to dissolve in high shear emulsifying oil phase, heating and stirring evenly, the self emulsifying defoamer compound can be obtained.