| Name | Tween20 | EINECS | 500-018-3 |
| CAS No. | 9005-64-5 | Density | 1.106 |
| PSA | 133.14000 | LogP | 4.46260 |
| Solubility | 100 g/L | Melting Point | 98.9 °C (decomp)
|
| Formula | Unspecified | Boiling Point | 100oC |
| Molecular Weight | 522.6692 | Flash Point | 199.4oC |
| Transport Information | N/A | Appearance | pale yellow oily liquid |
Appearance and properties: light yellow oily liquid
Density: 1.106
Boiling point: 100ºC
Flash point: 199.4ºC
Refractive index: 1.4685-1.4715
Stability: Stable. Incompatible with strong oxidizing agents.
Storage condition: 0-6ºC
Production method
1. Put 1 mol Span20 into the reactor, add 50% liquid alkali as catalyst under stirring, gradually heat up, reduce pressure and dehydrate, after the water is drained, use nitrogen to replace the air in the reactor, after the air is expelled, the temperature rises to 120℃ and 20 mol ethylene oxide is introduced, the reaction temperature is maintained at 150 ~ 170℃, the pressure is 0.2 ~ 0.3MPa. After the ethylene oxide is passed, it is cooled to 80 ~ 90℃, the material liquid is driven into the neutralization kettle with glacial acetic acid, and then decolorized with hydrogen peroxide, and finally cooled and decolorized, and finally cooled and discharged, and the packaging is the finished product. Under the catalysis of sodium methanol (or sodium ethanol), at 130 ~ 170℃, a certain amount of ethylene oxide was added to span-20 to obtain the product.
Use
1. This product is oil-in-water emulsifier, which can be used as solvent enhancer, diffuser, stabilizer, lubricant and antistatic agent. It can be used as an anti-wax agent in oil Wells and can remove the wax formation in oil Wells. As a viscosity reducer, it can reduce the flow viscosity of crude oil and improve oil well production and transport capacity.
2. It is used in medicine and daily chemical industry as solvent, penetrant and dispersant for drugs and cosmetics. Because this product has anti-rust and lubricating properties, it is used to prepare anti-rust lubricating oil and rust removal grease. O/W type food emulsifier, used alone or mixed with Span-60, Span-65, Span-80. China stipulates that it can be used for ice cream, and the maximum usage is 1.5g/kg; The maximum usage in fruit juice drinks is 0.75g/kg; The maximum amount used in mooncakes is 0.5g/kg.
3. Used as non-ionic emulsifier, wetting agent, penetrant. In the pharmaceutical and daily chemical industries,
4. Used as solubilizer, penetrant and dispersant for medicines and cosmetics. In adhesives, coatings, inks and pigments industries, it is used as a control agent for the flow of color carriers and as a dispersant to prevent precipitation. In the textile industry, because of its good emulsification of fat and fat oil, it is used as a softening agent, finishing agent, lubricant and antistatic agent for various fiber fabrics. In detergent production, it is combined with sodium alkyl benzene sulfonate to improve decontamination ability, foaming ability and resistance to polyvalent metal ions. Due to its non-toxic and good emulsifying and dispersing ability, it can also be used as emulsifier for various foods, pesticide emulsifier, rust-proof lubricating oil and rust removal grease.
China
