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Jul 19, 2021
Performance characteristics
This product is a long-lasting anti-foaming polyether-modified silicone defoamer specially developed for use in harsh environments such as high temperature, high pressure, acid and alkali using imported raw materials. This product is made of polyether copolymer with strong hydrophilicity and long-lasting foam suppression and polysiloxane with strong hydrophobicity and rapid foam breaking as the main components. This product is different from general emulsion defoamers. It has self-emulsifying properties. After undergoing high temperature sterilization, it can automatically restore the state of the emulsion without breaking the emulsion, bleaching, or delamination in the foaming system. It has high temperature resistance, High pressure, acid and alkali resistance, shearing, rapid defoaming, and excellent performance of long-lasting foam suppression. Due to the use of high-efficiency dispersant, it is uniformly dispersed in the foaming system and has significant defoaming and foam suppression effects. Compared with ordinary silicone defoamers of the same specification, only 60% of the amount can meet the requirements of defoaming and foam suppression. High cost performance. At the same time, this product has excellent defoaming and performance under medium and normal temperature and normal use conditions. It can be used as a substitute for polyether defoaming agent in the fermentation industry.
Active ingredient
Polysiloxane, polyether copolymer, high-efficiency dispersant.
This product is a milky white viscous liquid; non-volatile matter: 25±1%; PH value: 6-8; stability: (3000 revolutions/20 minutes) no delamination; ionic characteristics: non-ionic.
Use1. This product can be widely used in erythromycin, lindamycin, abamectin, gentamicin, penicillin, oxytetracycline, tetracycline, tylosin, glutamic acid, lysine, lemon Acid, xanthan gum and other fermentation industry defoaming and foam suppression. 2. Widely used in defoaming and foam suppression in the fields of textiles, printing and dyeing, coatings, dyes, paper, ink, oil fields, sewage treatment, sugar, food processing, etc.
Instructions1. Fermentation industry: if it does not have the conditions for staged disinfection, add 0.1-0.3‰ to the basic material at one time, and then flow or drip in the fermentation cycle, the general usage amount is 0.3-0.5‰; 2. Textile printing and dyeing industry: use For jet overflow dyeing, bleaching, printing and pulping, the general usage amount is 0.1-0.3‰; 3. Paint industry: add after dilution, the amount is 0.1-0.2‰; 4. Paper industry: pulping, washing, papermaking, coating The glue process can be added after dilution, the dosage is 0.1-0.3‰. 5. This product has excellent foam suppression ability. It is recommended to add it before the medium is not foamed, which can effectively suppress foam. When it is diluted, it can be adjusted arbitrarily at a ratio of 1:5-1:20.
A preparation method of organosilicon polyether copolymer belongs to the technical field of organosilicon surfactants. In order to solve the problem of many side reactions and difficult control in the process of hydrosilylation reaction in the prior art, octamethylcyclotetrafluoroethylene Silicone, tetramethylcyclotetrasiloxane, hexamethyldisiloxane and acid catalyst are added to the reactor in a certain proportion, heated to the reaction temperature, and kept warm to obtain hydrogen-containing polymethylsiloxane; The prepared hydrogen-containing polymethylsiloxane, allyl-terminated polyether, catalyst, hindered amine and antioxidant are added to the reactor, heated to a certain temperature under normal pressure, and kept warm to prepare organosilicon polyether copolymer Things. The invention not only effectively controls the formation of dehydrogenation polycondensation and acetal by using hindered amines and antioxidants, but also avoids the self-oxidation of polyethers, reduces the generation of side reactions, and can reduce the catalyst to a certain extent. Dosage, adding antioxidants in the reaction can speed up the reaction rate.