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The chemical structure of siloxane -- 2016-11-04

The step of building the chemical structureof the siloxane is the process of determining the length of the polymer chain, branching,and insertion of the organic group. From the point of view of its chemicalstructure, the structural groups entering the molecule are represented by theletters M (monofunctional), D (difunctional), T (trifunctional) and Q(tetrafunctional). The M functional groups are chain terminating because theyare monofunctional; the D functional group is a linear increment, makin ...

Silicone technology -- 2016-11-03

Siloxane compounds were well known in the1960s, but it was not until the 1940s that Dr. Eugene RoChow pioneered the workof commercializing such important compounds. The chemical nature of siloxanesallows polymer chemists to build accurate molecular structures using idealnanotechnology. The siloxane polymer is derived from silica (Si02), whichaccounts for 25% of the total crust. In the presence of a carbon source, thesilica is converted to a siloxane at elevated temperatures. The resulting metali ...

Physical and chemical properties -- 2016-11-02

Polydimethylsiloxane chemical stateDimethyl silicone oil, colorless or light yellow liquid, odorless, hightransparency, with heat resistance, cold resistance, viscosity with temperaturechange is small, waterproof, surface tension is small, with thermalconductivity, thermal conductivity of 0.134-0.159W / M * K, light transmittanceof 100%, dimethyl Silicone oil non-toxic and tasteless, with physiologicalinertia, good chemical stability. Electrical insulation and weatherability,hydrophobic, and has ...

The role of polysiloxane -- 2016-11-01

There are few silicone-free compounds inthe new cosmetic formulations, and the use of silicone compounds in personalcare products has achieved significant growth. In addition, even with the mostadvanced technology of the formulator, still inevitably use siloxane.Silicone polymers consist of differenttypes of compounds, including conventional silicone oils, water-solublepolymers, oil-soluble polymers, fluorine-soluble polymers, and polymers withvarious solubility. They exist in a variety of forms ...

Derivatization of polysiloxanes -- 2016-10-31

The final action to be considered is the derivatizingreaction. In this step, the reaction group added to the functional action stepis further reacted to give a new compound, and the reaction of the hydroxylgroup with the polydimethylsiloxane copolymer polyol is an example of such areaction. In fact, a series of surface-active siloxanes, comparable to a largenumber of standard surfactants, have been developed and marketed. Siliconeesters are an excellent example of the effect of derivatization on ...

Leveling agent principle -- 2016-10-24

Surface tension is the main driving forceof coating leveling, but the surface tension difference, but it is the maincause of surface defects. To improve the surface tension of the coating toachieve the surface tension balance, which is the flow of the coating andleveling is very useful, but it can’t. So people had no choice but to reducethe surface tension of the coating to eliminate surface tension difference,control the surface state of the coating to eliminate surface defects. Such asthe eli ...

Powder solid defoamer use -- 2016-10-21

Powder solid defoamer can be used for metalcleaning agents, electroplating cleaning agents, alkaline degreasing agents, high-gradespray, metal wire drawing fluid, flux, ultrasonic cleaning agent, alkalinedegreasing agent, washing detergent bowl, beer bottle cleaning agents, powdercleaning agents, chemical cleaning agents, cutting fluid, industrial cleaningagents, civilian detergents, powdered detergent, powder detergent, electrolysiswater treatment, starch, paper / pulp, textile, printing and dy ...

Development of defoamers -- 2016-10-20

Recently, researches on defoamers havefocused on the compound of organosilicon compounds and surfactants, thecompound of polyether and organosilicon, the combination of water-soluble oroil-soluble polyether and silicon-containing polyether, etc. Agent, thecompound is one of the development trend of defoamer. At present defoamers,polyether and silicone defoamer performance is the most excellent, these twotypes of defoamer modification and the development of new varieties of researchis also more a ...

Polysiloxane type defoamer -- 2016-10-18

Polysiloxane defoamer with defoamingrapidly, anti-foam for a long time and safe non-toxic and so on. But it isinsoluble in water, high temperature, alkali resistance is poor, polyetherdefoamer high temperature, strong alkali resistance, but its defoaming speedand suppression bubble time are not ideal The polyether chain is grafted intothe polysiloxane chain through the condensation technology, which has theadvantage of the second kind of antifoaming agent, and becomes a defoamingagent with excel ...

Molecular structure of coupling agent -- 2016-10-17

Coupling agent is an important, widely usedin the field of treatment agent, mainly for polymer composites additives. Themost important characteristic of the molecular structure of the coupling agentis that the molecule contains two groups with different chemical properties. Oneis a group of pro-inorganic, easily with the inorganic surface of the chemicalreaction; the other is the pro-organic groups, and synthetic resin or otherpolymer chemical reaction or hydrogen bond dissolved in them. So the ...

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