Silicone defoamer has a wide range of uses and application fields, including erythromycin, sanitizer, abamectin, gentamicin, penicillin, oxytetracycline, tetracycline, tylosin, glutamic acid, lysine It is used as defoamer in fermentation industry such as amino acid, citric acid and xanthan gum. Also used in textile, printing and dyeing, paint, dye, paper, ink, oil field, sewage treatment and other fields. When used in printing and dyeing, it has good compatibility with the additives in the dye bath, and does not affect the shade and color fastness.

The use of silicone as a spray-dyeing defoamer has been reported in many literatures. In the old dyeing process, the general application of dimethyl polysiloxane defoamer can achieve satisfactory defoamer effect and ensure uniform dyeing. However, the new dyeing process uses high temperature and high pressure machinery. In this machinery, the dyed object is moved by the jet of dyeing liquid and is dyed at the same time. Although the generated foam can be defoamed by ordinary silicone antifoaming agent, under high temperature and high pressure, ordinary silicone antifoaming agent will produce film-like precipitation and cause spots to be dyed. The use of block copolymers can overcome the above shortcomings, because these defoamer components are soluble in cold water, but insoluble in hot water, so they can play a defoaming effect.

However, the defoaming effect of this copolymer defoamer is unsatisfactory. If a certain amount of foggy SiO2 is added to the copolymer, a satisfactory defoaming effect can be achieved, and a uniformly dyed fabric can be produced. . It is used for defoaming in the high temperature dyeing process and fermentation process of polyester fabrics. In addition, it can also be used for defoaming of diethanolamine desulfurization system and defoaming of various oil, cutting fluid, antifreeze, water-based ink and other systems. Foam is a very representative, excellent performance and widely used silicone defoamer.