The formation and application of silicone emulsion-Iota

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Service > The formation and application of silicone emulsion

The formation and application of silicone emulsion

A silicone emulsion is a form of silicone oil. The following from the silicone fabric softening agent and silicone oil emulsion type defoaming agent two aspects to introduce.

A silicone fabric softening agent.

Silicone emulsion is mainly used as silicone softener. The first generation silicone textile finishing agent is two methyl silicone oil and silicone oil containing hydrogen (and its derivatives) mechanicalmixture. The second generation of silicone finishing agent for fabric is hydroxyl terminated poly two methyl siloxane emulsion, which is composed of eight methyl siloxane ring four monomer, water,catalyst, emulsifier and other raw materials are made of emulsion polymerization. Because of the polymerization and emulsion is completed in one step, which has the advantages of short time, high efficiency, simple equipment, convenient operation, and the obtained emulsion is very stable, with active groups of polymer particles are very uniform, both ends of the prepared (Qiang Ji) can be further reacted to the film, to improve the application effect of emulsion, which is mechanical silicone oil emulsion as.

Hydroxy silicone oil emulsion according to the surface active agent can be divided into differentcationic, anionic, nonionic, compound ion and other types of emulsion.

1 cationic hydroxy silicone oil emulsion

Cationic hydroxy emulsion polymerization the emulsifier is quaternary ammonium salts (reported in the foreign literature is eighteen alkyl three methyl ammonium chloride, ammonium hydroxide ascatalyst). Cationic hydroxy emulsion can be used for a variety of textile finishing, can improve thefabric handle, improve the performance of fabric elasticity and smooth, crisp; the other is its unique advantages of ideal fabric waterproof agent, and methyl hydrogen silicone oil emulsion andwaterproof performance, waterproof and durability can be reached very high the level, can be used as vinylon canvas awning waterproofing agent, waterproofing agent of polyester kapoor.

2 anionic hydroxy silicone oil emulsion

The characteristics of anionic hydroxyl emulsion in fabric finishing agent in good compatibility, the emulsion is very stable. Especially in the majority of textile printing and dyeing auxiliaries of anionic,cationic hydroxy if the milk is often easy to cause the demulsification of bleaching oil, anion andhydroxy emulsion can avoid this disadvantage, so more users welcome, use is very extensive.

3 compound ion type hydroxy silicone oil emulsion

Cationic hydroxy emulsion is a kind of excellent fabric softening finishing agent, but this emulsion isresistance to hard water, not with dimethylol two hydroxy ethylene urea resin (2D) resin catalyst,magnesium chloride and anionic whitening agent with bath use, therefore there are some limitationsin the use of. In addition, because the emulsion stability is poor, easily separated from thepolysiloxane emulsion, floating on the surface, commonly known as "floating oil". If in the process of emulsion polymerization, using cationic and nonionic emulsifier compound, preparation of hydroxy silicone oil emulsion can overcome the disadvantages of cationic emulsifier, preparation of silicone emulsion ability, hard water can be used simultaneously with 2D resin, magnesium chloride and whitening agent VBL, and has good heat resistance and freezing resistance of.

4 nonionic hydroxy silicone oil emulsion

Nonionic hydroxyl hydroxyl ion type milk than milk has strong adaptability, better stability, so many countries have vigorously of nonionic hydroxyl emulsion. Such as the production of new products,Swiss Ciba geigy UltrateX FSA, is a molecular weight of more than 200000 heads of hydroxyl poly two methyl siloxane emulsion, DC-1111 anionic hydroxyl USA Tao Kangning milk a step forward.

5 other active groups of silicone finishing agent

In order to adapt to all kinds of fabric finishing senior needs, improve the silicone fabric anti oil, antielectrostatic and hydrophilic properties, and chemical fiber fabric has many advantages of natural fabrics, silicone workers on other active groups such as amino, amide, ester, nitrile, carboxylic,epoxy introduced in silicone molecule. The introduction of these groups make silicone finishing agent for fabric has special effects, for example, shrink and soft silicone molecules suitable forintroducing amino wool finishing; introducing amide for antifouling, softness is also greatly improved: the introduction of cyano oil resistance, copolymer polyoxyethylene ether and siliconeorganic antistatic effect is good; fluorine modified silicone oil has many advantages to, antifouling,anti-static, waterproof etc..

Two silicone oil emulsion type defoaming agent.

Silicone oil emulsion type defoaming agent for oil in water (O/W) emulsion, water is a continuous phase, silicone oil is a non continuous phase. It is the silicone oil, emulsifier and thickener arepremixed, and then gradually add water to mix, finally in a colloid mill grinding repeatedly until they are in line with the requirements of the emulsion.

Silicone oil emulsion type defoaming agent is a defoaming agent in the most widely used, one of the largest amount of defoaming agent. It is easy to disperse in water system, which can be widely used as defoaming agent in aqueous system. When in use, the emulsion directly into the foaming system,can obtain good defoaming effect. In order to improve the accuracy of measurement and antifoaming effect of emulsion, generally do not directly use thick silicone oil emulsion 10% above: but it first with cold water or the direct use of foaming liquid diluted to less than 10%. Contraindication to the use of hot or cold liquid dilution, otherwise it will cause the emulsion breaking. The dilutedemulsion stability becomes poor, the storage process may also occur stratification (floating oil)phenomenon, namely the demulsification. The diluted emulsion should be used as soon as possible. If necessary, can be added to improve the stability of the emulsion thickener. For intermittent operation, in the operation system of silicone oil emulsion can be added before the time,also can use the batch feeding way; for the continuous operation process, silicone oil emulsionshould be continuously or intermittently added in the appropriate part of the system.