43results about How to "Strong anti-foaming ability" patented technology

The invention discloses a preparation method of a defoaming agent with good stability. The preparation method comprises the following steps: (1), preparing a defoaming functional auxiliary agent; (2),weighing raw materials for use; (3), preparing a finished product. The preparation method of the defoaming agent is improved; the preparation method is reasonable in coordination of the steps and convenient to popularize and apply; the prepared defoaming agent is rapid in defoaming, strong in foam-inhibiting ability, stable in using quality, good in comprehensive characteristics and very high inmarket competitiveness and production benefits.

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 an oleic acid ester modified silicone defoamer for coating and a preparation method thereof. The present invention at first carries out esterification reaction with oleic acid and alcohols, obtains esterified product intermediate; Then in N 2 In the protected catalyst system, the addition reaction of hydrogen-containing silicone oil and the esterified product intermediate is used to obtain the active substance of the oleic acid ester modified silicone defoamer; Mineral oil and emulsifier are compounded to prepare oleic acid ester modified silicone defoamer. The oleic acid ester modified silicone defoamer produced according to the present invention is applied to eliminate foam in papermaking coating, has little negative impact on coating coating and paper surface mechanical properties, and has low dosage and high defoaming speed. Fast, strong anti-foaming ability, non-toxic and harmless, simple production process and so on.

The invention provides a lubricating defoamer for a drilling fluid and a preparation method thereof. The lubricating defoamer for the drilling fluid is prepared from the following raw materials by weight percent: 30-43% of fatty acid, 15-25% of organic amine, 30-40% of base oil, 2-6% of penetrating agent and 10-15% of defoamer. Compared with the prior art, the lubricating defoamer for the drilling fluid is capable of functioning as the lubricant and the defoamer at the same time; the field operation steps are simple and the production cost is reduced.

The invention relates to the technical field of coating varnish, in particular to anti-oxidation emulsion and anti-oxidation waterborne coating varnish prepared from the same. The anti-oxidation emulsion is prepared from raw materials in percentage by weight as follows: 30%-50% of an acrylic resin solution with neutral pH, 29%-41% of mixed monomers, 0.5%-1% of an emulsifier, 0.3%-0.8% of an initiator, 0.01%-0.05% of an oxidizing agent, 0.01%-0.05% of a reducing agent and 10%-25% of deionized water, and the sum of the raw materials in percentage by mass is 100%. According to the anti-oxidation emulsion, possibly existing acid-base substances can be reduced, the probability of oxidation is reduced, and hot stamping foil is not prone to oxidation; the anti-oxidation waterborne coating varnish prepared from the anti-oxidation emulsion contains no organic solvents, is low in content of VOCs (volatile organic chemicals) or free of VOCs, is environment-friendly, non-toxic and anti-oxidation, and is suitable for surface lustering of substrates, prone to hot stamping oxidation, of black cardboards, blackened paper, coated black paper and the like.

The invention discloses a silicone-modified unsaturated higher fatty alcohol ester defoamer and a preparation method thereof. The technical scheme adopted in the present invention is: first, in N 2 In the protected catalyst system, hydrogen-containing silicone oil and unsaturated higher aliphatic alcohol are added to obtain an intermediate, and then the intermediate and saturated fatty acid are esterified to obtain a silicone-modified unsaturated higher aliphatic alcohol ester. Emulsifying unsaturated higher fatty alcohol ester with mineral oil and emulsifier to prepare silicone modified unsaturated higher fatty alcohol ester defoamer. The defoamer prepared by the invention not only improves the emulsion stability of the defoamer itself, but also can be applied to papermaking wet cloth to enhance the water drainage performance of the paper machine, and has little negative impact on the mechanical properties of papermaking pulp and paper surface. It has the characteristics of fast defoaming speed, strong antifoaming ability, good degassing performance, non-toxic and harmless, and simple preparation process.