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Silicone oil lubricity -- 2017-04-11

Silicone oil surfactantDimethicone is low foaming, methylphenylsilicone oil showed a different degree of foaming.Causing the silicone oil in an organicsolvent solution surface tension reduction, which can make it capable ofdissolving them in the liquid phase enriched surface, having a siliconesurfactant show. Silicone oil can be emulsified in water, resulting in thedecrease in surface tension of water.This is the reason to do silicone defoamer.Their mode of action with concentration dependent; I ...

Silicone oil is usually divided into ordinary silicone oil and modified silicone oil two categories -- 2017-04-10

Silicone materials are a class of differentdegrees of functionality monomer (or intermediate), modified organic groupcomposition, made by the condensation reaction of various polymers; and againwith various additives, processed into various forms of products. Siliconematerials are generally divided into silicone, silicone rubber, silicone andsilane coupling agent four categories products group.Silicone oil is usually divided intoordinary silicone oil and modified silicone oil into two categories ...

Water-borne coatings are foamed during construction -- 2017-04-06

Foam stability is affected by several factors. Onefactor which is stable thin sandwich, sandwich the liquid inside can’t bedischarged or discharged slowly. Also electrostatic repulsion occupy themezzanine between ionic surfactants also prevents the bubble burst. Another factorprompting the foam stabilizer is Gibbs elasticity. By stretching a film havinga surface-active substance, such an elastic effect will be shown. In this case, thesurface of the double layer is expanded, resulting in local c ...

Another factor in the stability of the bubble is Gibbs elasticity -- 2017-04-05

In a liquid containing a surface active agent, aspherical bubble rising, into a stable macro bubble (big bubble). While these bubblesrise to the air interface, but which is encircled by a layer of surfactantmolecules. On the air interface also has a layer ofsurfactant molecules of the surface film, and therefore, when the bubbles riseto the surface to form a double layer. Double layerthickness of up to several microns, these small surface of the foam is verystable and difficult to eliminate. Bub ...

The foam is a stable dispersion of air bubbles in a liquid medium -- 2017-04-01

It can be defined as the foam of air bubbles in aliquid medium in a stable dispersion. If the general air into the liquid, thebubble generated can assume a spherical shape. Since the air is lessdense than the liquid, and thus it will migrate to the surface, when the gasreaches the surface of the liquid without surfactant, the bubble will burst,the air inside the bubble dissipates, the liquid surrounding the bubble in theprevious and together. Thus, the pure liquid (liquid containing nosurfactant ...

The most important properties of surfactants -- 2017-03-31

In many inks and coatings processingproduction process, the need to use surface-active substances to achievespecial effects. Forexample, in the production of water-based paint, water-insoluble base materialproduction, water-insoluble base material is required to deal with the use ofemulsifiers. At the same time,we have to improve substrate wetting and coating pigment dispersion by using additives.Surfactant most importantcharacteristic is that they have a tendency to build in the interface, such ...

Used for surface treatment of glass fibers -- 2017-03-30

For the surface treatmentof glass fiber. Silane coupling agent can improve theglass fiber and resin adhesive properties, improve the glass fiber reinforcedcomposite material strength, water resistance, weather resistance and otherproperties. In 2004 the use of glass fiber silane coupling agentaccounts for about 50% of the total consumption, which used more varieties ofvinyl silane, aminosilane, methacryloxysilane and so on.For surface treatment ofinorganic fillers. Silane coupling agent In thein ...

Silane coupling agent is obtained -- 2017-03-29

Silane coupling agentis a kind of special structure of low molecular weight organic siliconcompounds. Thegeneral formula for RSiX3, where R represents amino, mercapto vinyl, epoxy,chloropropyl, cyano and methacryloxy groups and other groups. These groups and different matrix resins have a strongability to react, and x represents a hydrolyzable group such as halogen,alkoxy, acyloxy and the like. Silanecoupling agent is trichlorosilane (HSiCl3) and with reactive groups ofunsaturated olefins in the ...

Room temperature curing agent and heating curing agent -- 2017-03-28

Curing agent can be divided according touse at room temperature curing agent and heat curing agent. Epoxy resin at hightemperature curing general good performance, but in civil construction in theuse of paint and adhesives due to heating difficulties, need room temperaturecuring. So most of the use of fatty amines, ring lipids and polyamide, and soon. In particular, coatings and adhesives used in winter have to be used incombination with polyisocyanates, or polyhalines having a malodorous odor.A ...

It is important to have a comprehensive understanding of polyamine curing agents -- 2017-03-27

The curing temperature of the curing agentand the heat resistance of the cured product has a great relationship.Similarly, in the same type of curing agent, although the same functionalgroups, but due to different chemical structure, its properties and curingproperties are different. Therefore, a comprehensive understanding of the samefunctional groups and different chemical structure of the polyamine curingagent of the traits, characteristics, the choice of curing agent is veryimportant.In term ...

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