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Dimethicone 100 cst is a linear, non-reactive, and unmodified polydimethylsiloxane.
Dimethicone 100 cst has a broad range of uses in personal care formulations as an emollient.
Dimethicone 100 cst allows formulators to modify a product's spreadability and conditioning effects.
CAS: 63148-62-9
MF: C6H18OSi2
MW: 162.38
EINECS: 613-156-5
Synonyms
DIETHYL ETHER RECTIFIED;ETHYL ACETATE PESTINORM SUPRA TRACE;SILICONE FLUID;2,2,4,4-TETRAMETHYL-3-OXA-2,4-DISILAPENTANE;BIS(TRIMETHYLSILYL)ETHER;Hexamethyloxy disilane;HMDO;dimethylsilicone fluid
Dimethicone 100 cst has the ability to reduce whitening affect and stickiness of cosmetic products, allowing skin feel to be optimized.
Due to their flexible polymer backbone, Dimethicone 100 cst are highly permeable to gases (e.g. oxygen, water vapor), which allows respiration of the skin.
Any of a large group of siloxane polymers based on a structure consisting of alternate silicon and oxygen atoms with various organic radicals attached to the silicon:
Dimethicone 100 cst is a kind of oily linear polysiloxane produced from the hydrolysis and poly-condensation of chlorotrimethylsilane, ethyl chlorosilane, and phenyl chlorosilane containing mono-functional group and bifunctional group.
The commonly called Dimethicone 100 cst means the polydimethylsiloxane and polymethyl phenyl siloxane.
Dimethicone 100 cst is a kind of colorless, odorless, non-toxic, transparent, non-volatile liquid with non-corrosive effect on metal, low freezing point and good anti-water property and moisture resistance, low surface tension and being capable of being resistant to dilute acids and bases and has wide application in various national economy departments.
The viscosity of the Dimethicone 100 cst has small changes with temperature.
At-60~250 °C, Dimethicone 100 cst can be used as a lubricant agent for sextant, electromotor, shells aiming system and shipborne radar devices.
When being mixed with thickener such as carbon black and lithium stearate, Dimethicone 100 cst can be used for preparation of viscous grease for being applied to vacuum or high temperature sealing systems and the sealing of vacuum cocks, bushings, and valve.
Dimethicone 100 cst will not be cured by high compression with a relative high compressibility and can be used as liquid springs of aircraft and used for eliminating flutter in the buffer, shock absorption system to maintain the stability of the gauge pointer in aircraft cabin and damping of damper device.
Because of its non-corrosiveness on metal and long lifespan, Dimethicone 100 cst is widely used as hydraulic pressure fluid in various kinds of delivery systems such as being the hydraulic pressure fluid of aircraft landing gear, flaps, doors, and speed brakes; Because of its small density, low viscosity, Dimethicone 100 cst can decrease the weight of the hydraulic pressure systems of the aircraft system by 45% compared with the mineral oil system.
Dimethicone 100 cst is heat resistant and can be used as the heat transfer medium of-50~250 ℃; it does not absorb moisture and has excellent electrical insulation and can resist high temperature to be used as a dielectric liquid for being applied to the capacitors and the miniature transformer of encapsulating and impregnating.
Dimethicone 100 cst is permeable to visible light and can be coated to the lens and optical glass to improve the light transmission properties; its being coated to the motion picture film can reduce the friction and extend the lifespan of the film.
Dimethicone 100 cst has a good water resistance and can be used for processing wool, rayon, nylon, cotton fabric and can be used for making waterproof fabric; it has a low surface tension and can be used for plastic and rubber mold releasing agents; in the food and textile industry, Dimethicone 100 cst can be used in defoamers.
Dimethicone 100 cst is non-toxic with physiologically inertia and can be used for the treatment of flatulence and can also play a role of skin care when added to cosmetics.
Dimethicone 100 cst Chemical Properties
Melting point: −59 °C(lit.)
Boiling point: 101 °C(lit.)
Density: 0.963 g/mL at 25 °C
Tg: -123
Vapor density: >1 (vs air)
Vapor pressure: <5 mm Hg ( 25 °C)
Refractive index: n20/D 1.377(lit.)
Fp: >270 °C (518 °F)
Storage temp.: 2-8°C
Solubility: Chloroform (Slightly), Ethyl Acetate (Sparingly), Toluene (Sparingly)
Form: Oily Liquid
Specific Gravity: 0.853
Color: Clear colorless
Odor: Odorless
Water Solubility: PRACTICALLY INSOLUBLE
Merck: 14,8495
Dielectric constant: 2.7（Ambient）
Stability: Stable. Incompatible with strong oxidizing agents.
EPA Substance Registry System: Dimethicone 100 cst (63148-62-9)
Dimethicone 100 cst is milk-white viscous liquid and is non-volatile and odorless.
Dimethicone 100 cst has a relative density of O.98~1.02.
Dimethicone 100 cst is miscible with benzene, gasoline and other kinds of chlorinated hydrocarbons, aliphatic and aromatic hydrocarbons; it is not soluble in methanol, ethanol and water, but can be dispersed in water.
Dimethicone 100 cst is Non-flammable, non-corrosive and is chemically stable.
Benefits
Non-comedogenic (won't clog pores),
Light and non-greasy,
Forms a breathable, protective film over the skin to protect against TEWL (transepidermal water loss),
Adds soft and supple texture to finished products,
Reduces tackiness,
Reduces whitening/soaping effect that occurs during application of creams and lotions,
Enhances spreadability,
Suitable for many different skin care, sun care, and makeup applications.
Uses
Dimethicone 100 cst can be used as emulsifiers. China has provided that it can be applied during the fermentation process with the maximum usage amount being 0.2g/kg.
Dimethicone 100 cst can be used as advanced lubricants, anti-vibration oil, insulating oil, defoamers, release agents, polishes and vacuum diffusion pump oil.
Dimethicone 100 cst can be used as the paint for prevention of moisture and rust of metal surface.
Dimethicone 100 cst can also be used as the coating for the surfaces of buildings for prevention of water.
Dimethicone 100 cst is used as hardening polyurethane foams additive.
(Liquid) Adhesives, lubricants, protective coat- ings, coolants, mold release agents, dielectric fluids, heat transfer, wetting agents and surfac- tants, foam stabilizer for polyurethanes, diffusion pumps, antifoaming agent for liquids, textile fin- ishes, water repellent, weatherproofing concrete, brake fluids, cosmetic items, polishes, foam shields in solar energy collectors, rust preventives.
(Resin) Coatings, molding compounds, laminates (with glass cloth), filament winding sealants, room- temperature curing cements, electrical insulation, impregnating electric coils, bonding agent, modifier for alkyd resins, vibration-damping devices.
(Elas- tomer, or silicone rubber) Encapsulation of elec- tronic parts; electrical insulation; gaskets; surgical membranes and implants; automobile engine com- ponents; flexible windows for face masks, air locks, etc.; miscellaneous mechanical products.
Dimethicone 100 cst can be used for a wide range of applications such as: heat transferring medium in chemical and petrochemical industries, a dielectric coolant, protective coatings for building materials, a cosmetic additive.
Dimethicone 100 cst can be used for applications such as: protective coatings for building materials, a cosmetic additive, a dielectric coolant, a lubricant and antiflatulent agent.
Production Methods
Dimethicone 100 cst elastomers are generally prepared from chlorosilanes.
The chlorosilanes are hydrolyzed to give hydroxyl compounds that condense to form elastomers.
Applications include electrical insulation, gaskets, surgical membranes and implants, and automobile engine components.
The Poly methyl siloxane and gas-phase silicon dioxide are mixed and crushed using roller to silica grease, then add polyoxyethylene alcohol, Tween 80 and deionized water for emulsion to generate Dimethicone 100 cst.
