115results about How to "Good defoaming performance" patented technology

A plant oil-based defoamer and a preparation method of same. The invention relates to the technical field of defoamers. The defoamer is composed of plant oil, a defoaming substance, a defoaming aid and an emulsifier. The defoaming substance is mainly composed of one or more of fatty acid amide, fatty acid metal soap and white carbon black. Plant oil serves as a dispersion system. One or more of the fatty acid amide, the fatty acid metal soap and the white carbon black serve as the defoaming substance. A low-foam emulsifier is employed for improving stability, water dispersibility and anti-foaming performance of the plant oil-based defoamer. With the plant oil as the dispersion system, the defoamer has better system compatibility, dispersibility, system stability, anti-foaming performance and is green, environment-friendly and degradable. The defoamer has excellent anti-foaming performance in aqueous coatings, aqueous printing ink, aqueous gloss oil, latex, sewage treatment and papermaking black liquid processing.

The invention relates a defoaming agent used for printed circuit board, which is highly effective, safe, cheap, no silicon, good water-dispersible and easy handing. The defoaming agent comprises the following components: 1 defoaming active matter, comprising polyoxyethylene and polypropylene oxide block polyether which are used aliphatic alcohol, aliphatic acid and fatty acid ester as start substance; 2 inferior defoaming substance, which are lower aliphatic alcohol / ether substance; 3 deflocculating agent. Dividing the defoaming agent into 100 parts, defoaming active matter is 5-100 parts, inferior defoaming substance is 0-90 parts, and others which have not 100 parts are added deflocculating agent.

This invention discloses a method for preparing an antifoaming agent for aqueous laminated film glue. The antifoaming agent comprises: carrier (mainly mineral oil) 65-90 wt.%, main antifoaming agent (white carbon black, fatty acid metal soap, amide and MQ resin) 1-15 wt.%, auxiliary antifoaming agent (modified polyether, R1O(EO)x (PO)yR2) 2-20 wt.%, and emulsifier (nonionic surfactant with HLB value of 8-10) 3-15 wt.%. The method comprises: (1) stirring the primary antifoaming agent and the auxiliary antifoaming agent in the carrier, heating to 140-150 deg.C, and keeping for 2 h; (2) rapidly cooling to 70-80 deg.C, keeping for 40 min, cooling to 50 deg.C, adding the emulsifier, and stirring uniformly. The antifoaming agent has such advantages as high safely and high performance, and can be used in aqueous laminated film glue, paint, oil ink, coating cloth, etc.

The invention relates to an organic silicon defoaming composition. Vinyl polysiloxane and hydrogen-containing silicon resin are subjected to a hydrogen silicon alkylation reaction, hydrogen-containing polysiloxane is dropwise added into the system to have a reaction to form a liquidity cross-linked polymer of a space structure, and finally the polymer is mixed with silicon resin, silicon dioxide and other filler to prepare the polysiloxane defoaming composition. The degree of branching of the cross-linked silicon oil can be greatly improved by the adoption of a small amount of hydrogen-containing silicon resin; when the method of dropwise adding the hydrogen-containing silicon oil is adopted for preparing the defoaming active matter, the reaction is mild and easy to control, the problems that reactant is prone to gelling and active matter is unstable in storage on the premise of adopting no polydimethylsiloxane or other solvents are solved, and the prepared active matter has the good and lasting defoaming performance in a high-temperature strong-base system.

The invention discloses a non-silicon composite emulsion type antifoaming agent. The stock solution of the non-silicon composite emulsion type antifoaming agent comprises the following components in percentage by mass: 30-70 percent of alkymer, 3-15 percent of antifoaming active ingredient, 5-15 percent of lipophilic emulsifier and hydrophilic emulsifier, 1-5 percent of thickening agent and 15-50 percent of antifoaming auxiliary agent, wherein the antifoaming auxiliary agent is tripolyglycerol ether fatty acid ester; and mixture of aqueous solution of the emulsifier and the thickening agent is added into the stock solution of the non-silicon antifoaming agent to emulsify under certain technological conditions to prepare the stable non-silicon composite emulsion antifoaming agent. The non-silicon antifoaming agent prepared by the invention is milk white liquid with viscous appearance, and has viscosity of 80-200 mpa.s, high stability and superior antifoaming performance.

A defoaming agent for anionic or non-ionic foaming agent used in production of rubber and plastics is prepared from hydrocarbonylated oil 40-60 wt portions, C4-C8 alcohol amine 3-29 portions, C10-C18 fatty acid 2-30 portions, alcohol amine ester of C10-C18 fatty acid 3-15 portions, codefoaming agent 5-15 portions, and disperser 3-8 portions through emulsifying with water. Its advantages are high defoaming speed and strong power on suppressing foams.

The invention belongs to the technical field of fine chemical industry and discloses a non-silicon defoamer which comprises acrylate polymer, organic solvent carrier, hydrophobic particle and defoaming aid. The acrylate polymer is prepared frommonomer-1, monomer-2, unsaturated terminated polyether, hydrocarbon, dilutent and initiator. The invention further discloses a preparation method of the non-silicon defoamer. The invention further discloses application of the non-silicon defoamer in defoaming and inhibiting foam in a system rich in an anionic surfactant. Acrylate polymer is taken as a main active matter, so that the defoamer has excellent foam eliminating and inhibiting performance. By dropwise adding monomer by steps, defoaming performance of the acrylate polymer is improved; unsaturated terminated polyester is utilized for modifying, so that hydrophilicity of the acrylate polymer is improved, and momentary defoaming ability of the acrylate polymer is further improved; foam inhibiting performance of the defoamer is improved by modifying through olefin with 6-22 carbon atoms.

The invention provides a low-viscosity optical adhesive composition, which is prepared from the following components with contents in percentage by mass: 60 to 80 percent of vinyl silicone oil, 5 to 15 percent of hydrogen-containing polysiloxane, 1 to 3 percent of coupling agent, 3 to 15 percent of viscosity modifier, 1 to 3 percent of construction additive, 0 to 4 percent of photoinitiator, 0.001to 0.05 percent of catalyst and 0.001 to 0.05 percent of inhibitor. The low-viscosity optical adhesive composition can be used for quickly completing the full lamination of a super-large-size multipoint touch screen, moreover, cannot generate gas-bubble and adhesive-overflow phenomena, and meanwhile, has favorable bonding performance, temperature-resistant and damp-resistant reliability and coldand hot impact stability. The invention also provides a preparation method of the low-viscosity optical adhesive composition. The preparation method comprises the steps of proportioning, blending preparation, debubbling and subpackaging, and the like. The low-viscosity optical adhesive composition is simple in process and is safe and environment-friendly, and the industrialization is easily realized.

The invention provides a mineral oil defoaming agent comprising mineral oil, a fatty acid metal soap, fatty acid amide, white carbon black, a defoaming auxiliary agent and an emulsifying agent. The invention has the technical scheme that the fatty acid metal soap, the fatty acid amide and the white carbon black are simultaneously selected as defoaming substances and a method mixing the defoaming substances into the mineral oil is changed, thus the stability and the foam removing and depressing properties of the mineral oil defoaming agent are improved. The mineral oil defoaming agent has better foam removing and depressing effects in the processes of papermaking black liquor, coating, sewage treatment, latex, cleaning, and the like.

The invention discloses a defoaming agent for a metal cutting processing fluid and a preparation method of the defoaming agent. The defoaming agent for the metal cutting processing fluid comprises thefollowing constituent materials: silicone grease, modified silicone oil, an emulsifier and water, wherein the modified silicone oil is at least one of alkyl-modified silicone oil, polyether-modifiedsilicone oil and alkyl-polyether co-modified silicone oil. Meanwhile, the disclosed preparation method of the defoaming agent for the metal cutting processing fluid comprises the following steps: (1)preparation of the modified silicone oil: mixing hydrogen-containing silicone oil with a modifier for a reaction so as to obtain the modified silicone oil, wherein the modifier is at least one of olefin and polyether; and (2) preparation of the defoaming agnet for the metal cutting processing fluid: mixing the silicone grease, the modified silicone oil and the emulsifier, and then adding water forphase inversion emulsification so as to obtain the defoaming agent for the metal cutting processing fluid. The defoaming agent for the metal cutting processing fluid has excellent properties of defoaming foam inhibition, compatibility and stabilizer, requirements of harsh working conditions can be met, and the preparation method is simple, and is suitable for popularization and application.