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Send EmailSilicone oil, SILICONE FLUID, Methyl silicone oil, latex, aeropax, silbar, Dimethyl silicone oil 201, Dimethyl silicone oil 201,HMDO, Methyl silicone oil, Simethicone, Hexamethyloxy disilane, Dimethicream, 63148-62-9 , 9016-00-6, 9006-65-9
CAS: 63148-62-9
Molecular Formula: C6H18OSi2
Names and Identifiers
| Name | Silicone oil |
| Synonyms | HMDO Silicone oil SILICONE FLUID Hard foam silicon Methyl silicone oil dimethylsilicone fluid Hexamethyloxy disilane DIETHYL ETHER RECTIFIED BIS(TRIMETHYLSILYL)ETHER ETHYL ACETATE PESTINORM SUPRA TRACE Hard foam silicon (An even vesicant) 2,2,4,4-TETRAMETHYL-3-OXA-2,4-DISILAPENTANE |
| CAS | 63148-62-9 |
| EINECS | 613-156-5 |
CAS: 9016-00-6;9006-65-9
Molecular Formula: (C2H6OSi)n
Names and Identifiers
| Name | Dimethyl silicone oil 201 |
| Synonyms | latex silbar aeropax dermafilm dimethicone simethicone dimethicream dimethyl silicone silicone fluid 500 silicone oil dc 200 silicone fluid, 100 silicone fluid 1,000 dimethylpoly-siloxane Poly(dimethylsiloxane) Dimethyl silicone oil 201 polydimethylsiloxane 1'850 polydimethylsiloxane 16'000 polydimethylsiloxane 158'000 polydimethylsiloxane 173'000 polydimethylsiloxane emulsion Silcorel(r) adp1000 antifoam compound reduced volatility polydimethylsiloxane polydimethylsiloxane, trimethylsiloxy term polydimethylsiloxanes, trimethylsiloxy terminated polydimethylsiloxane, trimethylsiloxy terminated, blend |
| CAS | 9016-00-6 9006-65-9 |
| InChI | InChI=1/C2H6OSi/c1-4(2)3/h1-2H3 |
Dimethyl silicone oil 201
CAS: 9016-00-6;9006-65-9
Molecular Formula: (C2H6OSi)n
Names and Identifiers
| Name | Dimethyl silicone oil 201 |
| Synonyms | latex silbar aeropax dermafilm dimethicone simethicone dimethicream dimethyl silicone silicone fluid 500 silicone oil dc 200 silicone fluid, 100 silicone fluid 1,000 dimethylpoly-siloxane Poly(dimethylsiloxane) Dimethyl silicone oil 201 polydimethylsiloxane 1'850 polydimethylsiloxane 16'000 polydimethylsiloxane 158'000 polydimethylsiloxane 173'000 polydimethylsiloxane emulsion Silcorel(r) adp1000 antifoam compound reduced volatility polydimethylsiloxane polydimethylsiloxane, trimethylsiloxy term polydimethylsiloxanes, trimethylsiloxy terminated polydimethylsiloxane, trimethylsiloxy terminated, blend |
| CAS | 9016-00-6 9006-65-9 |
| InChI | InChI=1/C2H6OSi/c1-4(2)3/h1-2H3 |
Physico-chemical Properties
| Molecular Formula | C6H18OSi2 |
| Molar Mass | 162.38 |
| Density | 0.963 g/mL at 25 °C |
| Melting Point | −59°C(lit.) |
| Boling Point | 101°C(lit.) |
| Flash Point | >270 °C (518 °F) |
| Water Solubility | PRACTICALLY INSOLUBLE |
| Vapor Presure | <5 mm Hg ( 25 °C) |
| Vapor Density | >1 (vs air) |
| Appearance | Oily Liquid |
| Specific Gravity | 0.853 |
| Color | Clear colorless |
| Odor | Odorless |
| Merck | 14,8495 |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| Refractive Index | n20/D 1.377(lit.) |
| Physical and Chemical Properties |
density 0.963 |
| Use | Used as high-grade lubricating oil, anti-vibration oil, insulating oil, defoaming agent, stripping agent, polishing agent and vacuum diffusion pump oil |
Risk and Safety
| WGK Germany | 1 |
| RTECS | JM9237000 |
| FLUKA BRAND F CODES | 10 |
| TSCA | Yes |
| HS Code | 39100000 |
| Toxicity | LD50 oral in rat: > 17gm/kg |
Upstream Downstream Industry
| Raw Materials | Octamethyl cyclotetrasiloxane Chlorophenylsilane |
Nature
clear liquid to thick semi-solid. Colorless and tasteless, the molecular weight varies with the degree of polymerization. Insoluble in water, methanol, vegetable oil and paraffin, ethanol-soluble, butanol and glycerol, soluble in benzene, toluene, xylene, ether and chlorinated alkanes. The viscosity-temperature coefficient is small, the compression ratio is large, the surface tension is small, the hydrophobic moisture resistance is good, the specific heat capacity and the thermal conductivity are small. It has excellent electrical insulation and heat resistance, high flash point and low freezing point, and can be used for a long time in the temperature range of -50~200.
Preparation Method
using dimethyldichlorosilane, water and solvent as raw materials, octamethylcyclotetrasiloxane was obtained by hydrolysis, neutralization and fractionation. Octamethylcyclotetrasiloxane is obtained by polymerization in the presence of a catalyst.
Standard
This product is a linear polymer of dimethylsiloxane, containing 97.0% to 103.0% of polymerized dimethylsiloxane. There are different viscosities due to different degrees of polymerization. According to the different viscosity, this product is divided into 20, 50, 100, 200, 350, 500, 750, 1000, 12 500, 30 000 ten models.
Trait
- This product is colorless clear oily liquid; Odorless or almost odorless.
- This product is highly soluble in three gas methane, ether, toluene, ethyl acetate, methyl ethyl ketone, insoluble in water or ethanol.
relative density
The relative density of this product (General rule 0601) in 2 5 1 should comply with the provisions of the schedule.
refractive index
The refractive index of this product (General 0622) at 25°C should be in accordance with the provisions of the attached table.
viscosity
The kinematic viscosity of this product in time (General rule 0633 first method, capillary inner diameter of 2m; Viscosity of 1000/s and above using the second method) should comply with the provisions of the schedule.
Use
used as antifoaming agent in chemical, pharmaceutical and food industries; Used as head oil, hair cream, hair-forming agent, solid hair-forming agent and sunscreen agent in cosmetics industry; plastic and rubber molding processing for efficient release agent; Used for automobile, furniture, floor and leather polishing agent; In the electrical and electronic industry for high temperature dielectric liquid. Treated with this product of glass, ceramics, metals, textiles, cement products, not only hydrophobic, and corrosion resistance, mold, smooth surface, feel smooth. It can also be used as a variety of materials between the high and low temperature lubricant and plastic manufacturing lubricant and used as precision machinery and instrumentation of shock damping materials.
Differential diagnosis
- take 0. 5g of this product, add 0. 5ml sulfuric acid and 0. 5ml nitric acid, slowly burn, then form white fibrous matter, and finally leave white residue.
- take 0.5g of this product, put it in a test tube, and heat it with small fire until white smoke appears. 1% sodium sulfuric acid solution l l l on a test tube, the white smoke was exposed to the solution. Shake the second tube for 10 seconds, water bath heating for 5 minutes, the solution was purple.
- The infrared absorption spectrum of this product should be consistent with the control spectrum (Spectrum set 1 0 figure).
Exam
pH
Take ethanol and chloroform each 5ml, shake, add phenolphthalein indicator solution 1 drop, drop add sodium hydroxide titration solution (0. 02mol/L) to slightly pink. O g, shake; If colorless, add sodium hydroxide titration solution (0. 02mol/L)0. 15ml, should be pink; If pink, plus sulfuric acid titration solution (0.0lmol:/L) 0_15ml, pink should disappear.
mineral oil
take this product, and the control solution (take quinine sulfate, dissolve and dilute with 0.005mol/L sulfuric acid to make 0. 1# of the solution) in the UV lamp (365mn) under the comparison of fluorescence intensity, not deeper.
phenyl compound
Take 5.0g of this product, place it in a test tube with a plug, Add 10ml of cyclohexane precisely, shake it to dissolve it, and use UV-Vis spectrophotometry (General rule 0401), in the wavelength range of 250 ~ 270mn, the absorbance should not be measured. 2.
loss on drying
take this product, in the 150aC drying for 2 hours, the weight loss shall not exceed the limit specified in the schedule (General Principles 0831).
Heavy metals
take this product l .O g, set the colorimetric tube, add chloroform dissolved and diluted to 20ml, add the new 0. 002% dithizone chloroform solution 1. O m K water 0.5M l and ammonia test solution -0.0.5 ml of a mixed solution of 2% hydroxylamine hydrochloride solution (1:9) was used as a test solution. Another 20M l of chloroform was placed in a colorimetric tube, and 0.002% ml of New 1.0 dithizone chloroform solution and 0ml of standard lead solution were added. A mixed solution of 5m l and ammonia test solution-0.2% hydroxylamine hydrochloride solution (1 : 9) was used as a control solution. Immediately vigorously shake the test solution and the control solution for 1 min, and the red color produced by the test solution should not be deeper than that of the control solution (0. 0005%).
arsenic salt
take this product l.O g, add calcium hydroxide 1. 0g, mix, add a small amount of water, stir evenly, after drying, first burn with small fire to charring, then burn at 500~600°C to completely Ash, cool, add hydrochloric acid 5M l and water 23ml to dissolve, check according to law (General Rule 0 8 2 2 first law), should comply with the regulations (0. 0002%).
Content determination
According to the attenuated total reflection infrared spectroscopy, the absorbance (in peak height) around the wave number of 4000 ~ zoocnr1 is calculated from the infrared spectra of the sample and the reference substance, the polydimethylsiloxane content in dimethicone was calculated according to the following formula: polydimethylsiloxane content (%) = 100(AJ/A S)(D S/D U) where A u is the absorbance of the sample; A s is the absorbance of the control; The relative density of the sample at 25°C is considered; The relative density of the control at 25°C.
Category
pharmaceutical excipients, Defoamers and lubricants.
Storage
sealed storage.
Schedule
limit values of relative density, refractive index, viscosity and loss on drying
Label viscosity (mm2 /s) viscosity (mttiVfO relative density refractive index loss on drying (%)
20 18-22 0. 946-0. 954 1 .3980-1 .4020 20.0
50 47.5~52. 5 955~0. 965 1 .4005~1 ,4045 2.0
100 95~105 0. 962~0. 970 1 .4005~4045 0.3
200 190~220 0. 964~0. 972 1. 4013 ~ L 4053 0.3
350 332.5~367.5 0. 965~0. 973 1. 4013~1. 4053 0.3
500 475~525 0. 967~0. 975 1. 4013~1. 4053 0.3
750 712.5~787.5 0. 967~0. 975 1. 4013~1. 4053 0.3
1000 950~1050 0. 967~0. 975 1. 4013~1. 4053 0.3
12500 11875~13125 1. 4015~1. 4055 2.0
30000 27000~33 000 0. 969~0.977 1. 4010~1. 4100 2.0
Dimethicone aerosol
This product is dimethicone and silica solution type non-quantitative aerosol. The dimethicone should be 80.0% to 120.0% of the labeled amount, and the concentration of dimethicone in the drug solution should be 0.65% to 1.00%(g/g).
trait
The liquid in the pressure vessel is colorless to yellowish clear liquid.
identification
The oily liquid obtained under the item of content measurement was taken, and the same result was shown according to the test of item (2) of identification under the item of dimethicone.
examination
- leakage rate take 12 bottles of this product, remove the outer package, clean the surface with ethanol, place it vertically (upright) at room temperature for 24 hours, and weigh it accurately (W1) respectively, then place it at room temperature for 72 hours (accurate to 30 minutes), then weigh the valve precisely (W2), place it at 2-8°C for cooling, and then quickly drill a small hole on the valve, place at room temperature, separate the bottle from the valve after complete vaporization of the propellant, wash it with ethanol, dry it at room temperature, and weigh it accurately (W3) respectively, the annual leakage rate per bottle was calculated according to the following equation. The average annual leakage rate should be less than 3.5%, and not more than 1 bottle 5%.
- In addition to the fine particle dose and spray rate, the relevant provisions under The aerosol (General rule 0113) should be met.
inclusion assay
Take 3 bottles of this product, precision weighing, drill a small hole in the aluminum cover, insert the injection needle with rubber tube (do not contact with the liquid surface), the other end of the rubber tube into the water, after the propellant is slowly removed, remove the aluminum cover, move the contents to 3 evaporation dishes dried to constant weight at 110°C with a small amount of chloroform, and wash the container in portions with 20ml of chloroform, the lotion is incorporated into the evaporation dish, dried on a water bath, and dried to constant weight at 110°C, and accurately weighed to obtain the weight of each bottle containing dimethicone; in addition, clean and dry the empty bottle of this product together with the valve and the aluminum cover, accurately weigh and calculate the weight of each bottle of drug solution, and calculate the concentration (g /g) of dimethicone in the drug solution respectively, which shall be in accordance with the regulations.
category
Same as dimethicone.
specification
total 18g per bottle, containing 0.15g
of dimethyl silicone oil
storage
sealed and kept in a cool dark place.
Dimethicone tablets
This product contains 90.0% ~ 110.0% of the labeled amount of dimethyl silicone oil; Aluminum hydroxide shall be calculated as aluminum oxide (A1203), and shall not be less than 45.0% of the labeled amount.
prescription
dimethicone 50g
Aluminum hydroxide 80g
Glucose 600g
Made into 1000 tablets (50mg) or 2000 tablets (25mg)
trait
This product is white or off-white.
identification
- the oily liquid obtained under the item of content measurement was taken, and the same result was shown according to the identification test under the item of dimethicone.
- take an appropriate amount of fine powder of this product (about 0.5g equivalent to aluminum hydroxide), add 10ml of dilute hydrochloric acid, heat to dissolve, filter, and the filtrate shows the identification reaction of aluminum salt (General rule 0301).
examination
In addition to the disintegration time, the relevant provisions under tablets (General rule 0101) should be met.
Content determination
- Take 20 tablets (50mg specification) or 40 tablets (25mg specification) of dimethicone for precision weighing, fine grinding, and take appropriate amount (equivalent to 0.2g of dimethicone), extract with chloroform for 8 times, 15ml each time, combine chloroform solution, filter with G4 vertical melting funnel, filter residue and filter with chloroform, combine chloroform solution, the filtrate was dried to a constant weight evaporation dish at llO °C, evaporated to dryness on a water bath, dried to constant weight at 110°C, and accurately weighed to obtain the weight of dimethyl cinnamic oil contained in the test product.
- aluminum oxide precise weighing appropriate amount of the above fine powder (equivalent to about 0.4g of aluminum hydroxide), adding 10ml of hydrochloric acid and 10ml of water, heating on a water bath for 5 minutes to dissolve aluminum hydroxide, let it cool and filter, the filtrate was placed in a 100ml measuring flask, and the residue was washed with water. The residue was washed in the washing liquid and in the measuring flask, diluted with water to the scale, shaken well, and accurately weighed 20ml, from the time of neutralization with ammonia test solution to the time of precipitation, the determination shall be carried out according to law. Each 1 ml of ethylene diamine tetraacetic acid disodium titration solution (0.05 mol/L) corresponds to 2.549mg of Al3O3.
category
Same as dimethicone.
specification
(l)25mg (2)50mg
storage
sealed and stored in a dry place.
Reference Information
| Introduction | silicone oil is a polyorganosiloxane of chain structure with different degree of polymerization. It is prepared by dimethyldichlorosilane water hydrolysis of the initial condensation of polymeric ring, ring by cracking, distillation of low ring body, and then the ring, head agent, when the catalyst is put together, a mixture of various degrees of polymerization can be obtained, and the silicone oil can be obtained by removing the low boiling substance by distillation under reduced pressure. |
| properties | silicone oil is generally colorless or light yellow, tasteless, non-toxic, non-volatile liquid. Silicone oil is insoluble in water, and has high compatibility with many components in cosmetics, which reduces the sticky feeling of the product. It is used as a co-solvent, solid powder dispersant, and is used for refreshing cream, emulsion, facial cleanser, cosmetic water, make-up and perfume. Silicone oil has excellent heat resistance, oxidation resistance, low temperature resistance, can be used in -50 ℃- 180 ℃ temperature range for a long time; Strong shear resistance, for ordinary mineral oil more than 20 times the compressibility, is the ideal liquid spring; Low temperature viscosity coefficient, low vapor pressure, low surface tension, good water increase and lubricity; Excellent electrical properties, high breakdown voltage resistance, arc resistance, corona resistance, dielectric consumption is small; But also has the advantages of good light transmittance and no toxic effect on human body. |
| classification | silicone oil is divided into methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methyl phenyl silicone oil, methyl chlorine phenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoropropyl silicone oil, methyl vinyl silicone oil, methyl hydroxy silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil, cyanide silicone oil, etc.; From the use of points, there are damping silicone oil, diffusion pump silicone oil, hydraulic oil, insulating oil, heat transfer oil, brake oil, etc. |
| Use | silicone oil is used as a defoamer for food, cosmetics, papermaking, water treatment, detergent, sugar, fermentation, coating, textile printing and dyeing, drilling and oil refining, hydraulic oil and advanced lubricating oil, mold release agent and many other aspects; Used as silicone resin, silicone rubber raw materials; Adhesive raw materials; Flame retardant plastic additives; Insulating materials; Also used as wetting agent, leather finishing agent, etc. as emulsifier, China can be used for fermentation process, the maximum use of 0.2g/kg. used as advanced lubricating oil, anti-vibration oil, insulating oil, defoaming agent, stripping agent, polishing agent and vacuum diffusion pump oil, etc. used as metal surface moisture-proof, anti-rust coating, can also be used as building surface waterproof coating used as rigid polyurethane foaming additive |
| preparation | is usually prepared by hydrolysis of dichlorosilane. (CH3)2SiCl2 H2O →[(CH3)2SiO]4 →(CH3)3Si-O-Si(CH3)3[1] If monochlorosilane is used, the formation: R3SiCl H2O →(R3Si)2O if trichlorosilane is used, net-type but not linear Siloxane is generated: dichlorosilane is used as raw material, and a small amount of cyclic siloxane can also be generated: |
| oily linear polysiloxane | silicone oil is an oily linear polysiloxane composed of monofunctional and bifunctional methyl chlorosilane, ethyl chlorosilane, phenylchlorosilane was obtained by hydrolytic polycondensation. Silicone oils are commonly referred to as polydimethylsiloxanes and polymethylphenylsiloxanes. Silicone oil is a colorless, tasteless, non-toxic, transparent, non-volatile liquid, non-corrosive to metals, low freezing point, good water resistance and moisture resistance, low surface tension, resistant to dilute acid and dilute alkali, it is widely used in all sectors of the national economy. The viscosity of the silicone oil has a small change with temperature, and can be used as a lubricant for a sextant, a motor, a projectile aiming mechanism, a radar apparatus for a ship, and the like at -60 to 250 °c. Mixed with thickening agents such as carbon black and lithium stearate, viscous grease can be prepared for sealing of vacuum or high temperature sealing systems, vacuum stoppers, shaft sleeves and valves. It is not cured by high compression and has high compressibility. It can be used as a liquid spring of the aircraft to eliminate the vibration in the buffer and shock absorption system, so that the instrument pointer of the aircraft cabin is stable and other damping equipment is shock absorption. Because of no corrosion to metal and long service life, it is widely used as hydraulic liquid in various pressure transmission systems, and is used in the hydraulic system of landing gear, flap, door and deceleration plate of aircraft, the viscosity is low, which can reduce the weight of the aircraft hydraulic system by 45% compared with the mineral oil system. Heat resistance, can be used as a heat transfer medium of -50~250 ° C; Non-moisture absorption, good electrical insulation, high temperature resistance, can be used as dielectric liquid, for capacitors, small transformer packaging and impregnation. Through visible light, coating on the lens, optical glass can improve light transmission performance; Coating on film film can reduce friction and prolong film life. Good water resistance, for the treatment of wool, rayon, nylon, cotton fabric, can be made of waterproof fabric; Low surface tension, can be used as plastic, rubber release agent, in the food, textile industry used as defoaming agent. Dimethyl silicone oil non-toxic, with physiological inertia, can treat flatulence, can also be added to the cosmetics play a role in skin care. |
| Application | emulsified silicone oil is widely used in hand creams, shaving creams, hair conditioners, shampoos, Bath detergents, snow creams and other cosmetics, the effect was excellent. It is the emulsification of silicone oil on the hair flexibility, smoothness and wettability in the finished product to be fully expressed, excellent performance, has excellent conditioning effect on the hair, so that the hair is soft and flowing. SD14 emulsified silicone oil has good air permeability, and has a sustained-release and fixed-flavor effect on flavor and fragrance, which can prolong the flavor retention period. It has good complementarity with other ingredients in cosmetics, and helps them to play a better role. |
| Product characteristics | silicone oil has a silicon oxygen structure, which is a liquid compound at room temperature. The simplest polydimethylsiloxanes are of the formula [1]. In [2], when R, R1, and R2 are all methyl groups, α,ω-trimethylsiloxypolydimethylsiloxane is called, which is generally referred to as silicone oil. It is a linear structural polymer of low molecular weight. If R1 and R2 are not methyl, they do not fall within the scope of this section. Silicone oil is a colorless or light yellow transparent liquid. No smell. Tasteless. High boiling point. Low freezing point. The silicon-oxygen bond is very stable. The characteristics of silicone oil are: ① the surface tension is low, generally less than 209J/cm2, lower than that of water and general surfactants; (2) the solubility in water and oil is low, and the activity is high, which makes the surface tension of the aqueous solution can be reduced with a very small amount of silicone oil; (3) high stability to heat and oxygen, this feature makes silicone oil can be used at high temperature without decomposition; (4) low volatility, and has chemical inertness, for example, the dimethyl silicone oil with viscosity of 3 × 10-2 m2/s(20 ℃) has a vapor pressure of only 100 mPa at 6.67 ℃ and 40mPa at 220 ℃, and generally does not react with other substances; (5) high flash point, flame retardant; (6) good electrical insulation, mold release, defoaming; (7) No physiological toxicity, mouse oral LD50100000 mg/kg, intravenous injection of 1.0/kg (dog). |
| organic silicone oil | silicone oil is also called organic silicone oil. They are one of the varieties of silicone polymers. The monofunctional and bifunctional silicones are hydrolyzed to form the corresponding monohydric and dihydric silanol, and the silanol interacts under acidic conditions to form a cyclic or chain. Polycondensation is carried out under normal pressure and vacuum conditions to produce a silicone oil of a certain molecular weight. Silicone oil is an organic compound with a closed end group, and its structural formula is as follows: wherein R1, R2, R3 may be the same organic group or different organic groups, such as methyl, ethyl, phenyl, vinyl, Methoxy, ethoxy and hydrogen. Due to the difference of these groups, different organic silicone oils are formed. organic silicone oil is a colorless oily substance, its viscosity can be formulated, with a very low solidification temperature, and its viscosity with temperature change only less change, high thermal stability, without decomposition at high temperatures, the ends of the chains can no longer undergo further polycondensation. When heated above 400 ° C., a low molecular weight product is formed, and the bond between the methyl group and the silicon atom is not broken during the thermal decomposition. Silicone oil also has water resistance, electrical insulation, volume resistivity> 1015 Ω cm, dielectric constant = 2.58 or so, its surface tension is small, non-toxic. Low molecular weight silicone oil can be seen as a Newtonian fluid, with the increase of molecular weight gradually to the pseudoplastic fluid. Silicone oil vapor pressure and high compressibility. No corrosion to metal, stable to the vast majority of organic reagents. It has good compatibility with mineral oil and is resistant to dilute acid and alkali. organic silicone oil is often used as high-grade lubricating oil, shock-proof oil and insulating oil. It is also used as defoaming agent, release agent, polishing agent for furniture, floor, automobile, etc. and internal lubricant for plastic processing. It can also be used as a heat carrier, a shock damping material, a cosmetic additive, a medical polymer material, a glass fiber treatment agent, and the like. |
| transformer insulating oil | silicone oil is a kind of transformer insulating oil with good performance, which has good heat resistance and high flash point, it is not easy to oxidize and burn, and the long-term working temperature can be as high as 200. Silicone oil can resist arc and Corona, and its dielectric loss is almost unchanged in the large temperature range (-40~110 ℃) and frequency range (103 ~ 108Hz). In addition, it also has good viscosity and temperature, low freezing point, volatile, non-toxic, non-polluting environment and so on. Silicone oil has the disadvantages of large dielectric loss, easy hydrolysis and high price. At present, the silicone oil used more and better is "polydimethylsiloxane". Silicone oil is soluble in water, and can also react with the relevant components in the air, so it should be strictly sealed in use, and the need to take measures to prevent air intrusion. |
| silicone oil for lubricating oil | anti-foaming agent and synthetic lubricating oil. Silicone oil is composed of Si-O chain and organic matter, it is a odorless, tasteless organic liquid, with high chemical stability, low freezing point, low volatility, oxidation resistance and high temperature resistance. Dimethylsiloxane (silicone oil for short) has been used as an anti-foaming agent for over 50 years. Silicone oil in the lubricating oil is only in the insoluble state to have anti-bubble, if in the dissolved state not only anti-bubble but the role of foaming agent. Therefore, the correct selection of the appropriate viscosity is very important, generally choose 100~100000/s (25 C) viscosity of silicone oil as anti-foaming agent. The low viscosity silicone oil is easy to disperse and shows the anti-foaming property, but the solubility is large, and the anti-foaming persistence is poor; The high viscosity silicone oil has poor anti-foaming property, but the persistence is good. In order to learn from each other, two kinds of high and low viscosity are often mixed. General dosage in about 10 mg/kg. methyl silicone oil is the reaction of methyl chloride and silicon under the action of copper catalyst to generate a mixture of chloromethyl silane, which is then hydrolyzed to generate methyl silane, the polymerization is then carried out in the presence of an acid or base catalyst. Silicone Oil anti-foaming agent has good effect, less amount, widely used, commonly used in internal combustion engine oil and industrial lubricating oil. In order to be highly dispersed in the oil, the silicone oil is first dissolved in a solvent (such as kerosene) to make a concentrated solution, and then dispersed in the oil by high mechanical stirring. If the dispersion is not good, the anti-foaming effect is poor. Therefore, the silicone oil anti-foaming agent is very sensitive to the blending technology. Reference: Dictionary of fine chemicals. Beijing: Chemical industry press. 1998. P. 843. |
| production method | The polymethylsiloxane and fumed silica were mixed and rolled into silicone grease, and then polyoxyethylene alcohol, tween 80 and deionized water and other emulsified. |
| spontaneous combustion temperature | >400 |
Physico-chemical Properties
| Molecular Formula | (C2H6OSi)n |
| Molar Mass | 236.534 |
| Density | 0.971 |
| Melting Point | -35°C |
| Boling Point | 155-220°C |
| Water Solubility | INSOLUBLE |
| Storage Condition | Room Temprature |
| Refractive Index | 0 |
| MDL | MFCD00148360 |
| Physical and Chemical Properties | Appearance colorless transparent liquid The main characteristics of dimethyl silicone oil is non-toxic and tasteless, with physiological inertia, good chemical stability, electrical insulation and weather resistance, good hydrophobicity, and has high shear resistance, it can be used at -50 °c to 200 °c for a long time. |
| Use | Industrial sector used as lubricating oil, anti-vibration oil, insulating oil, defoaming agent, mold release agent, etc.; And uses; Widely used as insulation, lubrication, anti-vibration, anti-dust oil, dielectric fluid and heat carrier, and used as defoaming, additives for film stripping, paint and cosmetics for daily use, etc. |
Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
Nature
polydimethylsilyl ether is a colorless transparent viscous liquid. Odorless and tasteless. Insoluble in water and ethanol, soluble in carbon tetrachloride, benzene, chloroform, ether, toluene and other organic solvents.
Preparation Method
octamethylcyclotetrasiloxane is obtained by hydrolysis, neutralization, cracking and fractionation of dimethyldichlorosilane, water and solvent raw materials, and hexamethyldisiloxane is used as the terminal blocking group to adjust the molecular weight, with sodium hydroxide or concentrated sulfuric acid as catalyst polymerization.
Use
Defoamer. In the process of cleaning and pre-film for industrial circulating cooling water system, the foam generated by adding a large amount of foam-generating agent can be removed, and the foam caused by pollution can also be eliminated. The use concentration is generally about 10 mg/L. The defoaming performance of the product is good, but the foam suppression performance is poor, and the foam generation cannot be continuously inhibited.
Physico-chemical Properties
| Molecular Formula | (C2H6OSi)n |
| Molar Mass | 236.534 |
| Density | 0.971 |
| Melting Point | -35°C |
| Boling Point | 155-220°C |
| Water Solubility | INSOLUBLE |
| Storage Condition | Room Temprature |
| Refractive Index | 0 |
| MDL | MFCD00148360 |
| Physical and Chemical Properties | Appearance colorless transparent liquid The main characteristics of dimethyl silicone oil is non-toxic and tasteless, with physiological inertia, good chemical stability, electrical insulation and weather resistance, good hydrophobicity, and has high shear resistance, it can be used at -50 °c to 200 °c for a long time. |
| Use | Industrial sector used as lubricating oil, anti-vibration oil, insulating oil, defoaming agent, mold release agent, etc.; And uses; Widely used as insulation, lubrication, anti-vibration, anti-dust oil, dielectric fluid and heat carrier, and used as defoaming, additives for film stripping, paint and cosmetics for daily use, etc. |
9006-65-9 - Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
Nature
polydimethylsilyl ether is a colorless transparent viscous liquid. Odorless and tasteless. Insoluble in water and ethanol, soluble in carbon tetrachloride, benzene, chloroform, ether, toluene and other organic solvents.
Preparation Method
octamethylcyclotetrasiloxane is obtained by hydrolysis, neutralization, cracking and fractionation of dimethyldichlorosilane, water and solvent raw materials, and hexamethyldisiloxane is used as the terminal blocking group to adjust the molecular weight, with sodium hydroxide or concentrated sulfuric acid as catalyst polymerization.
Use
Defoamer. In the process of cleaning and pre-film for industrial circulating cooling water system, the foam generated by adding a large amount of foam-generating agent can be removed, and the foam caused by pollution can also be eliminated. The use concentration is generally about 10 mg/L. The defoaming performance of the product is good, but the foam suppression performance is poor, and the foam generation cannot be continuously inhibited.
