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3846 results about "Defoamer" patented technology

A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Commonly used agents are insoluble oils, polydimethylsiloxanes and other silicones, certain alcohols, stearates and glycols. The additive is used to prevent formation of foam or is added to break a foam already formed.

Oil resistant (solvent), heatproof static conducting anti-corrosive paint and preparation thereof

The invention belongs to the corrosion protective coating technique field and provides an oil resistance (solvent) and temperature resistance electrostatic conducting corrosion protective coating and a preparation method thereof. The coating is mainly made by raw components by weight percentage of 20-35 percent of resinI which is used as basic material, 0-15 percent of modified resin II, 15-30 percent of conductive fillers, 1-3 percent of coupling agent, 8-20 percent of fillers, 10-15 percent of solvent, 2-10 percent of plasticizer, 0.5-1 percent of defoamer, 0.5-1 percent of flatting agent and 6-15 percent of curing agent. The coating is prepared according to the following steps: the resin I, the modified resin II, the coupling agent, the plasticizer, the flatting agent and the defoamer are put in a distributing tank. And part of mixed solvent is added to be stirred and distributed uniformly. The fillers are added proportionally and are put in a sand mill for sand milling after being dispersed and stirred uniformly at high speed, so as to obtain upper grinding pigment paste. The conductive fillers and the rest mixed solvent are added at low stirring speed. The conductive fillers are totally blended into the upper grinding pigment paste and stirring is carried out at middle speed, the viscosity is adjusted to be qualified and the fillers are filtered to obtain a qualified component A product. The curing agent is carried out subpackage according to proportion.
Owner:洛阳双瑞防腐工程技术有限公司

A kind of water-soluble polyether modified silicone defoamer and its preparation and compounding method

InactiveCN102284198ASelf-emulsifying abilityGood dispersionInksCoatingsPresent methodEther
The invention relates to a water-soluble polyether modified silicone defoamer. The preparation method of the polyether-modified silicone defoamer comprises the following steps: firstly, adding terminal allyl polyoxyalkylene ether into a container for stirring, removing water; then adding solvent and low hydrogen-containing silicone oil into the above solution and stirring; then The catalyst is added to carry out stirring and heating reaction under N2 atmosphere and reflux condensation conditions; after the reaction is completed, the solvent and low boilers are removed to obtain the water-soluble polyether modified silicone. The invention also provides a compounding method of the water-soluble polyether modified silicone defoamer prepared by the above preparation method. The defoaming agent solves the problems that polysiloxanes are difficult to dissolve in water, have poor high temperature resistance and strong alkali resistance, and polyether defoaming agents have unsatisfactory defoaming speed and foam suppression time. The compounding method of water-soluble polyether-modified silicone defoamer solves the problems of incomplete emulsification of simethicone-type defoamer, demulsification when used, low temperature resistance and poor foam suppression ability.
Owner:黄山市强力化工有限公司

High-ductility polymer-rubber powder-honey-combed cement concrete road covering material and construction process thereof

Disclosed is a cover material of polymer modification rubber powder porous concrete with high toughness and a making technique thereof. Wherein, in per cubic meter of the concrete, the polymer is 20 to 75 kg, the cement is 200 to 400 kg, and the water to cement ratio is between 0.25 to 0.40 ; in aggregates, the amount of a fine aggregate is less than or equal to 20 percent, and the amount of a coarse aggregate is more than or equal to 80 percent; 0 to 5 kg of plasticizer and/ or defoamer are/is added; rubber powder, whose volume fraction is not more than 50 percent, is used to replace the natural aggregate ; or the cement is replaced by mineral admixtures which are not more than 40 percent. The cover material is made by a small machine, a three-roller and an asphalt paver. The main technical parameters of the cover material are as follows: compressive strength is more than or equal to 15 MPa, flexural strength is more than or equal to 5 MPa, anti-skid structure depth is more than or equal to 2.0 mm, porosity is 18 to 22 percent, permeability coefficient is more than or equal to 1.5 mm/s, sound absorption coefficient is more than or equal to 0.30, and noise reduction effect is more than or equal to 5 dB. The cover material can comprehensively utilize the discarded rubber with the advantages of high toughness, sliding resistance and sound absorption and noise reduction. Thus, the cover material is applicable to the covers of the highway, the municipal road and the flat.
Owner:WUHAN UNIV OF TECH

Anti-icing and anti-frosting polyurethane coating and preparation method thereof

The invention belongs to the fields of aerospace, low temperature refrigeration and heat pump air-conditioning and relates to an anti-icing and anti-frosting polyurethane coating and a preparation method thereof. The anti-icing and anti-frosting polyurethane coating has good film forming properties, low temperature resistance and high hydrophobicity. The preparation method comprises that based on weight parts of a fluorosiloxane-containing polyurethane resin, 20 to 45 parts by weight of the fluorosiloxane-containing polyurethane resin, 40 to 50 parts by weight of one or more organic solvents, 0.2 to 1 part by weight of one or more defoamers, 0.2 to 1 part by weight of one or more anti-settling agents and 0.3 to 1 part by weight of one or more flatting agents are mixed into a mixed solution; 3 to 10 parts by weight of one or more silane coupling agents, 1 to 10 parts by weight of nanoscale inorganic oxide particles and 5 to 10 parts by weight of titanium dioxide are added into the mixed solution; and the mixture is subjected to ball-milling to form the anti-icing and anti-frosting polyurethane coating. Through utilization of the fluorosiloxane-containing polyurethane resin, the anti-icing and anti-frosting polyurethane coating has good adhesion with a base and has good surface hydrophobicity.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Aqueous acrylic modified epoxy ester primer-topcoat integrated anticorrosive baking finish

The invention discloses aqueous acrylic modified epoxy ester primer-topcoat integrated anticorrosive baking finish. The baking finish consists of the following components in part by weight: 45 to 65 parts of aqueous acrylic modified epoxy ester resin, 2 to 20 parts of amino resin, 5 to 35 parts of pigment, 0 to 15 parts of filler, 1 to 3 parts of water dispersible dryer, 0.1 to 0.55 part of pH regulator, 5 to 15 parts of softened water, 0.2 to 0.4 part of dispersant, 0.3 to 0.5 part of wetting agent, 0.15 to 0.25 part of flatting agent, 0.3 to 0.5 part of antifoaming agent, and 0.2 to 0.3 part of preservative and mildew preventive. Without organic solvent, the baking finish is safe, energy-saving and free from pollution; the pencil hardness reaches 2H, the coating performance is stable, the film-coating mechanical strength is high, the positive and negative impact resistance can reach 5Kg.cm, and the flexibility can reach 1mm; the baking finish can integrate antirust and anticorrosive functions, can be used as primer or topcoat, reduces the construction process, is simple and quick to operate, can be sprayed or dip-coated, and can be quickly cured; a coated film does not become yellow; and the baking finish meets the development direction of aqueous anticorrosive paint.
Owner:HUNAN XIANGJIANG PAINT GRP

Cementitious capillary crystalline waterproofing building material

The invention belongs to the technical field of building materials and particularly relates to a cementitious capillary crystalline waterproofing building material. The cementitious capillary crystalline waterproofing building material comprises the following components in parts by weight: 100 parts of cement, 65-110 parts of silica sand, 50-90 parts of a mineral admixture, 3-6 parts of an activator, 0.6-1.2 parts of a chelating agent, 3-5 parts of a calcium ion compensator, 3-6 parts of a capillary crystalline, 0.08-0.2 part of a retarder, and 0.5-1.0 part of other additives, wherein the other additives are the mixture of a defoamer and a dispersant, and the weight ratio of the defoamer to the dispersant in the mixture is 1:(1-3). The cementitious capillary crystalline waterproofing building material uses superfine slag powder as a mineral admixture, the silica fume is completely replaced, part of the cement is replaced, and the manufacturing cost is lowered; the waterproof material is relatively high in activity, the painted waterproof material further has a dense structure, and the cementitious capillary crystalline waterproofing building material has the characteristics of high wear-resisting property, high anti-permeability pressure, strong self-healing ability and the like.
Owner:宝武环科(湛江)资源循环利用有限公司
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