218results about How to "Good anti-foam performance" patented technology

The preparation method for industrial defoaming agent belongs to organic chemical industry field. First polymerize the glycerin to polyglycerol with polymerization degree of 2-10 under activator, add glycerin fatty acid ester or fatty acid for determined mass rate to process ester interchange and obtain the product. It is simple in technique, has good defoaming and foam inhibiting effect, gets raw material easily and fits to many techniques, such as paper making, sugar refining and fermentation.

The invention discloses a self-emulsifying molecular antifoaming agent and a preparation method thereof. The antifoaming agent comprises the following components in percent by mass: 20 to 60 percent of antifoaming active substance and 40 to 80 percent of dispersion medium, wherein the antifoaming active substance consists of higher fatty alcohol, alkynol, polyether and silicone oil in a mass ratio of 1:(0.8-1.5):(2-3):(2-4); and the dispersion medium is grafted star polymer. The preparation method comprises the following steps of: adding 50 to 150 parts of trichloromethane and 1 to 2 parts ofp-methyl benzene sulfonic chloride into 20 to 60 mass parts of active substance and 40 to 80 mass parts of star polymer, raising the temperature to between 40 and 70 DEG C, and reacting for 3 to 6 hours; and after the reaction is finished, washing sodium carbonate until the ph is 7, drying by using anhydrous sodium sulfate, and evaporating the solvent under reduced pressure to obtain the antifoaming agent. The extended arm of the star polymer in the antifoaming agent is grafted with the active substance, so that various components are synergistic, and the obtained antifoaming agent is high instability, low in surface tension, high in surface activity, high in antifoaming capacity, long in foam inhibition time and small in dosage.

The invention discloses a water-based metal cutting fluid suitable for soft water. The water-based metal cutting fluid comprises the following components in percentage by weight: 20-45% of base oil, 5-15% of modified polymerized ricinoleic acid, 0.5-5% of non-ionic surfactant, 5-15% of anionic surfactant, 5-15% of synthetic ester, 1-6% of coupling agent, 1-5% of additive and water in balancing amount. According to the invention, as the special molecular structure of the modified polymerized ricinoleic acid is skillfully utilized in the formula of the cutting fluid, the bubble releasing speed of the cutting fluid in the soft water is effectively increased, and the stability and lubricating property of the cutting fluid are greatly improved.

The invention relates to a seawater desalination de-foaming agent as well as a preparation method and application thereof. The de-foaming agent is prepared from silicon paste, polyether modified organic silicon, an emulsifier, a thickening agent and water, wherein the mass percent of the silicon paste is 5 to 20 percent, the mass percent of the polyether modified organic silicon is 10 to 30 percent, the mass percent of the emulsifier is 2 to 10 percent and the mass percent of the thickening agent is 0.5 to 2 percent. The preparation method comprises the following steps: (1) weighing the silicon paste, the polyether modified organic silicon and the emulsifier according to the mass percent and mixing at 70 to 80 DEG C to obtain a mixture; (2) preparing the thickening agent into a water solution; (3) injecting 1 / 3 or less of the thickening agent water solution into the mixture of step (1); after uniformly mixing, adding the residual thickening agent water solution in batches to obtain thede-foaming agent. The de-foaming agent provided by the invention has the characteristics of high stability, rapid de-foaming speed, good foam inhibition performance, good compatibility with a scale inhibitor and the like and has good environment-friendly performance and a wide application prospect.