Dimethicone applications
Dimethicone generally refers to polydimethylsiloxane, which is a hydrophobic silicone material. With Si-O-Si as the main chain, the linear dimethyl silicone oil with methyl group attached to the silicon atom has a series of characteristics due to the small intermolecular force, the molecule is helical in structure, the methyl group is arranged outward and can rotate freely. Such as colorless and transparent, temperature viscosity coefficient is small, large expansion coefficient, low vapor pressure, high flash point, high and low temperature resistance, low surface tension, high compression, inert to the material, chemically inert, non-corrosive and physiologically inert, and therefore in the various sectors of industrial and agricultural production, the defense industry,
scientific research and medical and health care sectors, have got a very wide range of applications. It is widely used in electrical insulation, demolding, defoaming, damping, shockproof, rolling, dustproof, waterproof, high and low humidity and so on.
1、Application in electromechanical industry
Dimethyl silicone oil is widely used in electric motors, electrical appliances, electronic instruments as temperature resistance, arc corona resistance, corrosion resistance, moisture, dust insulation medium, is also used as a transformer, capacitors, TV scanner transformer impregnant. In a variety of precision machinery, instruments and instruments, used as liquid anti-xia, damping materials. Dimethyl silicone oil shock absorbing performance is affected by the temperature is small, more for strong mechanical vibration and environmental temperature changes in the occasion, the use of instruments such as: aircraft, automobile instrumentation. Used for anti-vibration, damping, stabilization of instrument readings, but also as a liquid spring, and in the aircraft landing device.
2、For insulation, dustproof, anti-dance coating
In the glass, ceramic surface dip coated with a layer of dimethyl silicone oil, and heat treatment at 250-300 ℃, can form a layer of semi-permanent waterproof, mold and insulating film. With the treatment of insulating devices, can improve the insulating properties of the device: with the treatment of optical instruments, can prevent moldy lenses, branch mirrors: with the treatment of medicine bottles, can extend the preservation period of the drug, and does not make preparations for the loss of sticking to the wall: with the treatment of the surface of motion picture films, can play a lubricating effect, reduce friction, prolonging the life of the film.
3、Anti-foaming agent
Due to the dimethyl silicone oil surface tension is small, and insoluble in water, animal and vegetable oils and high boiling point mineral oil, chemical stability, and non-toxic, as an antifoaming agent has been widely used in petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, paper and other industries, as long as the addition of 10-100PPM of silicone oil has a good antifoaming agent role.
4、 As mold release agent
As mold release agent due to dimethyl silicone oil and rubber, plastic, metal and other non-adhesive, and used as a variety of rubber, plastic products molding agent, and for precision pin manufacturing. It is not only convenient to use it as mold release agent, but also makes the product surface clean, smooth and clear texture.
5、For lubricant
Dimethyl silicone oil is suitable for rubber, plastic bearings, gear lubricants. It can also be used as a lubricant for the rolling friction of steel or steel and other metal friction at high temperature, but because the lubricating property of methyl silicone oil at room temperature is not particularly good, in general, it is not recommended to be lubricant between metals at room temperature.
6、For additives
Dimethyl silicone oil can be used as additives for many materials, such as paint can be used as a brightening agent, add a small amount of silicone oil to the paint, so that the paint does not float packets, do not wrinkle to improve the brightness of the film, add a small amount of silicone oil to the ink, can be a high quality printing, add a small amount of silicone oil to the polishing oil (such as automotive varnish oil), can increase the light, protection of the paint film, and has excellent waterproofing effect.
7、Application in health care
Dimethyl silicone oil is not toxic to human beings and is not decomposed by body fluids, so it is also widely used in medical and health care. The use of its defoaming effect, made of oral gastrointestinal flatulence tablets, and pulmonary edema defoaming aerosol and other medicinal. Add silicone oil in the ointment. Can improve the penetration of drugs on the skin, improve the efficacy of drugs. Silicone oil as the base oil of some ointment agent for burns, dermatitis, bedsores, etc. have very good therapeutic effect, the use of silicone oil anticoagulant effect, available to deal with the surface of the blood storage device, to extend the time of storage of blood samples, and so on. Can also be used as a condom wet lubricant, and it does not kill sperm.
8, fiber oil
In fiber preparation, especially industrialized carbon fiber production, it is modified for use, mainly amino modified, polyether modified epoxy modified, etc., modified dimethylsiloxane oil with hydrophilicity, emulsification, high temperature resistance and other superior performance, the current domestic research and development of modified silicone oil is relatively backward.
9, other aspects
Dimethicone oil has many other uses in other areas. Such as: the use of its high flash point, no oh, colorless, transparent and non-toxic and other characteristics of the human body, in the steel, glass, ceramics and other industries and scientific research, as an oil bath or thermostat in the heat carrier. The use of its anti-shear performance is good, can do hydraulic oil, especially aviation hydraulic oil. With its treatment of rayon spinning head, can eliminate static electricity.
