405 results about "Defoamer" patented technology

The invention relates to the technical field of fine chemical engineering preparations, in particular to an environment-friendly non-silicon defoaming agent as well as a preparation method and application thereof. 3.6 to 5.1 parts of a defoaming aid; 0.24 to 0.35 part of a thickening agent; 2-3 parts of a dispersing agent; 2.6 to 3.5 parts of an emulsifier; 18 to 25.3 parts of an organic solvent; 65 to 82 parts of deionized water; wherein the polyether ester A and the polyether ester B with amphiphilic structures in the polyether ester can be quickly spread on the surface of foam, carry hydrophobic components to permeate a liquid membrane and accelerate foam breakage, and the defoaming assistant A and the defoaming assistant B further promote the defoaming and foam inhibition performance of the defoaming agent by reducing competitive adsorption to the defoaming agent and delaying release of active molecules. Compared with the prior art, the method has a wide application prospect.

The invention belongs to the technical field of cold-rolled sheet processing, and particularly relates to a physical defoaming alkali liquor circulation method which comprises the following steps: a foam capacitive monitoring array at the top of an alkali liquor tank generates a foam thickness gradient map in real time; real-time alkali liquor temperature, conductivity, circulating flow, strip steel running speed and historical foam thickness data are fused, a foam layer height prediction value is output, and when the prediction value exceeds a safety threshold value, a turbulence generator is automatically triggered to generate high-frequency pulse water flow; when the foam finally flows downwards to the top opening of the alkali liquor tank through the foam overflow pipe, the foam is crushed by high-frequency pulse water flow in the alkali liquor backflow pipeline and becomes alkali liquor to drop into the alkali liquor tank, the foam is physically crushed through fluid shear force and high-frequency vibration under the synergistic effect of the sectional type backflow pipeline and the capacitive foam monitoring array, the defoaming efficiency is high, and the defoaming effect is good. Dependent chemical defoaming agents are reduced, and the problems of strip steel surface residues and wastewater treatment are solved.

The invention relates to the technical field of coatings, and discloses a wear-resistant waterborne polyurethane finish paint and a preparation method thereof. The wear-resistant waterborne polyurethane finish paint comprises a component A and a component B in a mass ratio of (4-7): 1, the component A is prepared from the following components in parts by mass: 50 to 60 parts of waterborne polyurethane, 10 to 15 parts of hyperbranched polysiloxane, 2 to 3 parts of polyoxyethylene fatty acid, 0.8 to 1.2 parts of a de-foaming agent, 6 to 8 parts of color paste and 10 to 15 parts of water; and the component B comprises an isocyanate curing agent. The wear-resistant waterborne polyurethane finish paint prepared in the invention has excellent adhesion strength and wear resistance.

The invention relates to the technical field of building decoration materials, in particular to a high-performance antibacterial mildew-proof sealant and a preparation method thereof. The sealant is prepared from the following raw materials in parts by weight: 20 to 30 parts of silane modified polyurethane, 40 to 50 parts of nano calcium carbonate, 20 to 30 parts of a plasticizer, 3 to 7 parts of a hydroxyl silane coupling agent, 0.4 to 0.8 part of a mildew preventive, 0.3 to 0.7 part of an ultraviolet light absorber, 0.3 to 0.7 part of a de-foaming agent and 0.8 to 1.2 parts of a first catalyst. The high-performance antibacterial and mildew-proof sealant has long-acting antibacterial and mildew-proof performance, and excellent mechanical performance and weather resistance of the sealant can be maintained, so that the requirements of industries such as building, medical treatment and food processing on high-performance, healthy and environment-friendly sealing materials are met; and the preparation method is simple and controllable, the production cost is relatively low, and large-scale production can be realized.

The invention discloses a defoaming agent for an oil field, and relates to the technical field of chemistry. The defoaming agent is prepared from the following materials in parts: 20 to 50 parts of polyether modified silicone oil, 10 to 30 parts of an organic silicon defoaming agent, 15 to 35 parts of polyoxyethylene fatty acid, 25 to 45 parts of polydimethylsiloxane emulsion, 5 to 15 parts of an emulsifier, 3 to 10 parts of a thickening agent, 2 to 8 parts of a dispersing agent, 0.5 to 3 parts of a pH regulator and 50 to 100 parts of deionized water. The invention further discloses a preparation method of the defoaming agent for the oil field. According to the defoaming agent and the preparation method thereof, the defoaming agent is prepared according to a specific proportion, uniform dispersion and stable compatibility of all the components are ensured through a scientific preparation technology, and therefore the defoaming agent is endowed with excellent defoaming and foam inhibiting performance, and the defoaming agent has good defoaming and foam inhibiting effects in the specific application process. The defoaming agent can quickly eliminate foams generated in the oilfield exploitation process, obviously reduce the influence of the foams on the oil well yield, reduce the exploitation cost and ensure the smooth operation of exploitation equipment.

The invention discloses an organic silicon composite solid defoaming agent for space station water treatment and a preparation method of the organic silicon composite solid defoaming agent, and relates to the technical field of defoaming agents. The organic silicon composite solid defoaming agent for space station water treatment comprises the following raw materials in parts by weight: 25-35 parts of polydimethylsiloxane, 5-10 parts of water-soluble silicone oil, 10-15 parts of white carbon black, 3-5 parts of an emulsifier, 3-4 parts of a dispersant and 25-35 parts of a carrier. The preparation method comprises the following steps: reacting 1H, 1H-perfluorohexylamine with epoxy chloropropane to generate an intermediate 1, reacting the intermediate 1 with lauryl amine to generate an intermediate 2, and reacting the intermediate 2 with amino-polyethylene glycol-carboxyl to obtain the emulsifier. The prepared organic silicon composite solid defoaming agent for space station water treatment has excellent defoaming and foam inhibition performance and good water dispersibility.

The invention relates to the technical field of water-based paint defoaming agents, in particular to a composite defoaming agent and a preparation method thereof.The composite defoaming agent is prepared by compounding the following raw materials: modified polysiloxane, an emulsifier, nano silicon dioxide, a defoaming auxiliary agent, other auxiliary agents, a cosolvent and water, and has better chemical stability and thermal stability; a stable defoaming effect can be kept in an alkaline environment; the defoaming aid is added for synergistic effect, liquid surface tension is changed, foam stability is reduced, new foam can be prevented from being generated, the thickening effect is achieved, the viscosity of the system is increased, the product is more stable, and the excellent effect is still achieved under the condition that the content of the modified polysiloxane and the defoaming aid in the system is low; and the addition amount of the emulsifier is reduced for mixed use. The composite defoaming agent can be used for eliminating foam of a water-containing system, is high in defoaming speed, excellent in dispersing performance, long in foam inhibition time, high in efficiency and low in dosage, and is particularly suitable for water-based paint in an alkaline environment.

The invention belongs to the technical field of drier preparation, and particularly relates to a dishwasher drier and a preparation method and application thereof. The dishwasher drier provided by the invention comprises fatty alcohol-polyoxyethylene ether, a fatty alcohol polyethylene / polypropylene ether copolymer, water-based fluorine-containing polyether siloxane, a polyacrylate modified polymer, sodium isooctanol sulfate, a chelating agent, a suspension stabilizer, a preservative and water. The stainless steel foam inhibitor is applied to an automatic dish-washing machine, and by introducing a modified silicone oil or fluorocarbon compound composite system, a combination of a high-molecular-weight polymer and a low-surface-tension regulator and a biocompatible defoaming agent, the drying performance of the stainless steel surface is remarkably improved, and the foam inhibition effect is optimized; foam generated by protein and an anionic surfactant is efficiently eliminated, meanwhile, environmental protection and sustainability are emphasized, and an efficient, clean and environment-friendly solution is brought to the automatic dish washing machine industry.

The underwater anti-dispersion additive is prepared from the following components in parts by weight: 30 to 50 parts of a water-resistant dispersing agent, 20 to 25 parts of a water reducing agent, 20 to 25 parts of a suspending agent, 5 to 10 parts of a plastic expanding agent, 25 to 30 parts of a coagulating agent, 40 to 60 parts of sodium carbonate and 25 to 30 parts of a de-foaming agent. The grouting material is composed of the following components in parts by weight: 1000 parts of PO425 ordinary Portland cement, 5-10 parts of an underwater anti-dispersion additive and 400 parts of water. The prepared anti-dispersion cement-based grouting material has the advantages of early strength, no shrinkage, slight expansion, impermeability and high durability, is suitable for the field of underground buildings, and has a wide application prospect.

The invention relates to a preparation method of a blocky solid defoaming agent, which comprises the following steps: premixing a defoaming active matter and an emulsifier, stirring and mixing with paraffin at a certain temperature, and cooling and molding the mixed material to obtain the blocky solid defoaming agent. Wherein the emulsifier can ensure that the defoaming active matter can be uniformly dissolved and dispersed in a foaming system, so that an excellent defoaming effect is achieved. Paraffin is relatively high in hydrophobicity, so that not only can the performance of the product be enhanced, but also the blocky product can be ensured to realize a long-term foam eliminating and inhibiting function in flowing foaming liquid.

The invention relates to the technical field of asphalt mixtures, and discloses a preparation method of a cold-mixed full-steel-slag asphalt mixture, which comprises the following preparation steps: 1) adding coarse steel slag and fine steel slag into an asphalt stirring pot according to parts by mass, and stirring to form mixed steel slag; 2) stirring and mixing the modified steel slag powder, polydimethylsiloxane, fly ash, hydrogen peroxide and the mixed steel slag in parts by mass to form a first part of mixture, and taking out the first part of mixture for later use; (3) stirring the emulsified asphalt, the water-borne epoxy resin, the water-borne curing agent and the defoaming agent in parts by mass to form a secondary mixture; 4) stirring and mixing the first part of mixture and the second part of mixture, then adding the modified steel slag powder, and stirring and mixing to form a cold-mixed full-steel-slag asphalt mixture; through specific preparation steps and material proportioning, the performance of the cold-mixed full-steel-slag asphalt mixture is comprehensively optimized, and the construction workability, durability, fatigue resistance and water damage resistance are improved.

The present disclosure provides a unit dose product comprising a pouch formed from a water-soluble film material and a detergent composition disposed within the pouch. The detergent composition comprises about 5 to about 25 wt % water, about 20 to about 40 wt % of at least one surfactant, about 35 to about 55 wt % non-aqueous solvent comprising polyethylene glycol and glycerin, and at least one enzyme. A pack height of the unit dose does not decrease by more than about 30% over a temperature range of 0° F. to 125° F., and a Zein score of the detergent composition is not more than about 1.5% dissolved zein when tested on a 3% dilution. The composition can further comprise additional components, such as base, performance polymer, an anti-redeposition agent, a defoamer, a bleaching agent, a bleach activator, a chelating agent, an optical brightener, a bitterant, a corrosion inhibitor, or any combination thereof.

The invention discloses a fast defoaming powder defoaming agent and a preparation method thereof, and relates to the technical field of defoaming agents. The powder defoaming agent is prepared from the following raw materials in parts by weight: 30 to 40 parts of polyether modified silicone oil, 2 to 5 parts of organic silicon emulsion, 3 to 6 parts of dispersing agent, 4 to 6 parts of emulsifying agent, 1 to 2 parts of thickening agent and 50 to 70 parts of porous carrier. The powder defoaming agent prepared by the invention has good defoaming and foam-inhibiting performance, dispersing performance and thermal stability.

The invention relates to a high-performance concrete admixture composition for a wind power tower drum and a preparation method of the high-performance concrete admixture composition, and relates to the field of concrete admixtures. The water reducing agent is prepared from the following components in parts by weight: 35 to 45 parts of a shrinkage reducing type polycarboxylic acid water reducing agent, 8 to 12 parts of methoxy polyethylene glycol acrylate modified nano silicon dioxide, 1.5 to 2.5 parts of sodium dodecyl polyoxyethylene ether sulfonate, 0.8 to 1.5 parts of coconut oil diethanolamide, 0.3 to 0.8 part of sodium polyacrylate, 0.2 to 0.6 part of ammonium tripolyphosphate, 0.05 to 0.15 part of a polyether defoaming agent and 40 to 50 parts of water. According to the invention, the hydration process of the concrete is regulated and controlled through the synergistic interaction among various additives, the pore structure in the concrete is optimized, and an interface transition region is strengthened, so that the systematic improvement of the microstructure of the concrete is realized, and the strength and durability of the concrete are remarkably improved.

The present application discloses a kind of dispersing fast, low turbidity, high temperature and high pressure resistant, strong acid and strong alkali defoaming agent, which is prepared from the following components: 5-50% of white carbon black silica paste, 1-25% of capped polyether modified polysiloxane, 0.1-10% of spherical poly siesquioxane, 1-25% of compound polyether, 0.1-10% of thickening agent, 0.05-0.5% of sterilizing agent, and the balance of water, wherein the sum of the weight percentages of the components is 100%. The present application also provides a production process of the defoaming agent, which comprises the following steps: stirring the white carbon black silica paste, spherical poly siesquioxane and capped polyether modified polysiloxane with a homogenizer to mix them thoroughly, then adding the compound polyether, thickening agent and sterilizing agent, stirring them uniformly, and continuing to stir them rapidly with the homogenizer for 25-35 minutes to obtain the mixed uniform polyether modified polysiloxane defoaming agent. The purpose of the present application is to provide a defoaming agent with fast dispersion speed, low turbidity, high temperature and high pressure resistance, and strong acid and strong alkali resistance.

The invention discloses a defoaming agent for industrial automobile paint and a preparation method of the defoaming agent. The defoaming agent is prepared from the following raw materials in parts by mass: 20-40 parts of a star block polyether-siloxane copolymer; 10 to 25 parts of nano hydrophobic silicon dioxide aerogel; 30-70 parts of an alkylbenzene solvent (boiling point gt: 200 DEG C); 3 to 8 parts of epoxy group modified polyether siloxane; and 1 to 3 parts of polyether modified polydimethylsiloxane. The molecular weight range of the star block polyether-siloxane copolymer can effectively balance the defoaming property and compatibility, the siloxane chain segment of the star block polyether-siloxane copolymer destroys the elasticity of a foam film, and the siloxane chain segment cooperates with alkylbenzene to reduce local surface tension and accelerate foam rupture. The polyether chain segment and the siloxane chain segment have a synergistic effect, and the polyether chain segment adjusts hydrophilicity to adapt to different environments.

The utility model relates to the technical field of yellow rice wine production, in particular to a yellow rice wine pre-fermentation defoamer. The technical problems that a common yellow rice wine pre-fermentation device lacks a defoaming structure, foam cannot be treated in the yellow rice wine pre-fermentation process, a large amount of foam is generated by saccharified mash dextrin, and mash overflows out of a tank in a spraying mode are easily caused are solved. According to the technical scheme, the yellow rice wine pre-fermentation defoaming device comprises a tank body. According to the utility model, the air supply defoaming assembly is matched with the rotary driving assembly, so that bubbles generated by mash can be eliminated in the pre-fermentation process of the yellow wine, and mash bubbles are prevented from overflowing in the pre-fermentation process of the yellow wine, thereby solving the problems that a common yellow wine pre-fermentation device is short of a defoaming structure, and the production cost is low. The problems that foams cannot be treated in the pre-fermentation process of the yellow rice wine, a large amount of foams are generated by saccharified mash dextrin, and mash overflows out of a tank in a spraying manner are solved.

The invention discloses silicon polyurethane modified acrylic emulsion foaming printing adhesive cement and a preparation method thereof. The foaming printing adhesive cement is prepared from deionized water, a defoaming agent, an emulsifying agent, a buffering agent, an initiator, silicon PU modified acrylic emulsion, butyl acrylate, methyl methacrylate, itaconic acid, hydroxyethyl acrylate, a functional monomer, styrene, silane, a preservative and the like. The milk white liquid with blue fluorescence is prepared through a pre-emulsification technology, the viscosity is 300-600 mPa.s, the solid content is 47%-51%, a film forming matter is colorless and transparent, the pH is 7-8, the emulsion has the advantages of being high in adhesive force, good in water resistance and good in toughness, the preparation method is convenient to operate, water serves as a dispersion medium, harm to human bodies and the environment is avoided, and the production environment is safe. Foaming printing adhesive cement obtained from a physical foaming agent, titanium dioxide and the like prepared from the emulsion has a relief type three-dimensional ink pattern and a high-saturation color effect.

To provide a defoaming agent capable of exhibiting excellent defoaming properties (foam breaking and foam suppressing effects) and excellent surface finishing properties (cissing and foam breaking marks).SOLUTION: And at least one hydrophobic substance (C) selected from the group consisting of hydrophobic silica, fatty acid metal salts, fatty acid amides, and waxes, wherein the content of the liquid glycerin fatty acid ester (A) is 4 to 49% by weight, the content of the liquid alkylene oxide adduct (B) is 51 to 96% by weight, and the content of the hydrophobic substance (C) is 0.1 to 15% by weight, based on the weight of the liquid glycerin fatty acid ester (A) and the liquid alkylene oxide adduct (B).SELECTED DRAWING: None

According to the liquid defoaming agent for papermaking white water and the preparation method of the liquid defoaming agent, through combined use of the high-carbon alcohol emulsion and the polyether emulsion, the problem that the foam inhibition capacity of the high-carbon alcohol emulsion is insufficient can be solved, meanwhile, the alcohol ether solution is adopted as a solubilizer to be used for improving the cloud point of polyether in a system, the system is prevented from being changed due to the temperature, and the foam inhibition capacity of the high-carbon alcohol emulsion is improved. The precipitation of polyether leads to system imbalance; the defoaming agent obtained by compounding the high-carbon alcohol emulsion and the polyether solution in proportion can realize more excellent defoaming and foam inhibition performance in papermaking white water, and the storage stability is effectively enhanced.

The invention relates to the technical field of mortar materials, in particular to concrete antirust mortar and a preparation method thereof. The concrete antirust mortar is prepared from the following components in parts by weight: 35 to 45 parts of Portland cement, 10 to 20 parts of sulphoaluminate cement, 2 to 4 parts of a composite antirust agent, 1 to 3 parts of redispersible latex powder, 1 to 3 parts of silica fume, 2 to 4 parts of fly ash, 45 to 55 parts of quartz sand, 0.1 to 0.3 part of polypropylene fiber, 2 to 6 parts of modified polyurethane, 0.5 to 1.0 part of a water reducing agent, 0.1 to 0.2 part of a retarder, 0.3 to 0.5 part of a de-foaming agent and 15 to 25 parts of water. The concrete anti-rust mortar prepared by the invention has excellent waterproof performance, penetration resistance and chemical corrosion resistance, and can effectively inhibit the occurrence of corrosion of steel bars, thereby prolonging the service life and enhancing the durability of the steel bars.

The invention discloses a defoaming agent containing nano MOF and a preparation method and application thereof, and the defoaming agent is prepared from the following components in parts by weight: 1-5 parts of nano MOF, 10-20 parts of hyperbranched polyethyl siloxane, 10-30 parts of fluoropolyether, 1-5 parts of modified hydrophobic white carbon black, 1-5 parts of a base catalyst, 2-10 parts of an emulsifier and 1-3 parts of a stabilizer. The nano MOF in the defoaming agent is compounded with defoaming agents such as hyperbranched polyethyl siloxane and fluoropolyether, so that the high temperature resistance and chemical stability of the defoaming agent are improved. The nano MOF and the nano modified hydrophobic white carbon black are hybridized, and the hydrophobic nano MOF and the modified hydrophobic white carbon black are embedded into a hyperbranched skeleton, so that the mechanical puncture capacity of the particles is improved. The nano MOF can gradually release defoaming active components in the system, the defoaming duration is prolonged, and the foam inhibition performance of the defoaming agent in 3D printing is improved.

The invention belongs to the technical field of defoaming agents, and particularly relates to a degradable defoaming agent as well as a preparation method and application thereof. The degradable vegetable oil acid amide in the defoaming agent is easily dispersed in liquid, so that the surface tension of the liquid is reduced; the polyol fatty acid ester can form insoluble particles for defoaming; the nano-emulsion stabilizing aid physically and efficiently defoams by adsorbing gas, and has a thickening effect; fatty alcohol can be quickly diffused to a foam interface, so that the surface tension is reduced, and a quick defoaming effect is achieved. The prepared degradable defoaming agent is free of silicone oil residues, biodegradable in bio-based component and environmentally friendly, the fatty alcohol and the degradable vegetable oleic acid amide can conduct defoaming in time, the nano emulsion stabilizing additive and the fatty acid ester can inhibit the foam regeneration effect, the lauric acid diethanol amine and the Tween 80 can improve the compatibility and dispersity of all the components of the defoaming agent, and the defoaming effect is good. Through the synergistic effect of all the components, the foam inhibitor has excellent degradability, dispersibility and foam inhibition when being applied to paint and ink.

The invention relates to the technical field of emulsified asphalt, and particularly discloses emulsified asphalt and a preparation method thereof. The emulsified asphalt is prepared from the following components in parts by weight: 1000 parts of water, 1 to 3 parts of soap, 0.5 to 1 part of caustic soda, 2 to 4 parts of glass water, 0.5 to 1.5 parts of washing powder, 2 to 3 parts of lignosulfonate, 1 to 2 parts of alkylphenol polyoxyethylene phosphate, 0.2 to 0.6 part of potassium hydroxide, 400 to 600 parts of asphalt, 0.4 to 0.8 part of organic silicon defoaming agent, 0.2 to 0.4 part of polyether modified silicone oil, 1 to 1.5 parts of sodium carboxymethyl cellulose and 0.5 to 1 part of lauryl sodium sulfate. According to the invention, the soap, the caustic soda and the washing powder with optimized dosages are adopted to construct composite emulsification, the effect of reducing the oil-water interfacial tension is far better than that of a traditional single formula, and meanwhile, the emulsified asphalt is flatly and uniformly spread on a construction surface, so that the construction efficiency is improved, and the construction quality is improved. The base layer can be tightly attached, holes and pitted surfaces are avoided, and the construction efficiency and quality are improved.

The invention discloses an antioxidant dispersion liquid, which is prepared from the following components in percentage by mass: 20 to 30 percent of an antioxidant, 10 to 20 percent of a heat stabilizer, 5 to 10 percent of a terminating agent, 1 to 3 percent of a dispersing agent, 1 to 3 percent of an emulsifying agent, 0.1 to 0.5 percent of a de-foaming agent, 0.1 to 0.2 percent of a thickening agent and the balance of water, the heat stabilizer is magnesium-aluminum hydrotalcite with the magnesium-aluminum molar ratio of 3: 1 or 2: 1. The preparation method comprises the following steps: mixing the antioxidant, the heat stabilizer, the terminating agent, the dispersing agent, the emulsifying agent and the water, shearing and dispersing, sanding the mixed material until the particle size D50 is 1-2m, and adding the defoaming agent and the thickening agent, thereby obtaining the product. Compared with the prior art, the antioxidant dispersion liquid has excellent thermal stability, can significantly improve the whiteness and aging resistance of a PVC product after being applied to PVC, and has the advantages of simple process and low energy consumption.

The invention belongs to the technical field of defoaming agents, and discloses an emulsion type defoaming agent and a preparation method thereof. The emulsion type defoaming agent comprises 15-32 parts of a defoaming active substance, 3-12 parts of an emulsifier and 60-75 parts of a dispersion medium, the defoaming active substance comprises higher fatty alcohol, polyether and mineral oil; the emulsifier comprises stearic acid polyether ester and stearic acid, and the mass ratio of the stearic acid polyether ester to the stearic acid is (6-8): (2-4). The emulsion type defoaming agent provided by the invention has excellent defoaming and foam inhibition effects and strong stability; under the condition of not containing an organic silicon defoaming agent, the defoaming agent can simultaneously meet the requirements of rapid defoaming, foam inhibition, degassing and stable storage, and can be used as a papermaking defoaming agent with excellent performance.

The invention relates to a high-viscosity waterproof foam adhesive tape and a preparation process thereof, and relates to the technical field of foam adhesive tapes, the high-viscosity waterproof foam adhesive tape comprises a release layer I, a water-blocking adhesive layer I, a hydrophobic foam layer, a water-blocking adhesive layer II and a release layer II, the water-blocking adhesive layer I and the water-blocking adhesive layer II are obtained by coating a water-blocking adhesive, and the release layer II is coated with a water-blocking adhesive. The water-blocking adhesive is prepared from the following raw materials in parts by mass: 80 to 100 parts of acrylate copolymer, 10 to 15 parts of hydrophobic modifier, 5 to 10 parts of tackifying resin, 3 to 5 parts of cross-linking agent, 5 to 10 parts of filler A, 1 to 2 parts of antioxidant, 0.5 to 1 part of defoaming agent and 0.5 to 1 part of flatting agent. The preparation process comprises the following steps: coating two surfaces of the hydrophobic foam layer with a water-blocking adhesive, and covering the release layer to obtain the high-viscosity waterproof foam adhesive tape. The foam adhesive tape has the effect of improving the adhesion performance of the foam adhesive tape, and the foam adhesive tape has good waterproof performance and tensile performance.

The invention relates to a preparation method of a polysiloxane defoaming composition. The polysiloxane defoaming composition is prepared from silicone grease, a polyether-polysiloxane copolymer, a surfactant and polyether. The silicone grease is prepared from the following raw materials: branched polysiloxane, hydrogen-containing polysiloxane, silicon dioxide, a TQ polymer, an addition catalyst and an inhibitor; the polyether-polysiloxane copolymer is prepared from hydrogen-containing silicon resin with a spatial structure, diallyl alcohol polyether and allyl polyether through a reaction. The polysiloxane defoaming agent composition obtained by the invention has the characteristics of excellent foam control and easiness in cleaning.

The invention relates to a low-foam non-phosphorus compound degreasing agent and a preparation method, and belongs to the technical field of strip steel surface cleaning. The degreasing agent comprises the following components in percentage by mass: 2%-5% of sodium carbonate, 7%-12% of sodium hydroxide, 1.5%-10% of a non-phosphorus builder, 4%-7% of ethylene diamine tetra-acid disodium salt, 4%-7% of sodium carboxymethyl cellulose, 1.5%-3% of 4A zeolite, 12%-20% of a compound surfactant, 0.2%-1.5% of a solubilizer, 1%-4% of polyacrylamide and 0.2%-3.5% of a polyether modified silicon defoaming agent. The components perform their own functions and jointly form an efficient cleaning system of the degreasing agent.

This invention discloses a silicone emulsion defoamer for textiles and its preparation method. It is prepared from the following components by weight percentage: 5%-40% polysiloxane silicone paste, 0.3%-20% silicone polyether, 1%-20% emulsifier, 0.1%-5% thickener, 0.05%-0.3% bactericide, and the balance being water, with the sum of the weight percentages of all components being 100%. The stability of the emulsion under high temperature and high pressure environments is improved by using cross-linked polysiloxane silicone paste and silicone polyether with a specific structure. The cross-linked polysiloxane silicone paste provides superior defoaming and foam-suppressing performance. Utilizing the intertwined spatial structure of the high-viscosity silicone composition and the silicone polyether, the defoamer prepared by this method not only exhibits good stability under high temperature and alkaline environments but also significantly improves its late-stage foam-suppressing performance in sizing. More importantly, it enhances the compatibility between the silicone emulsion defoamer and the sizing.