25791-96-2
Poly(Propylene Glycol)
CAS: 25791-96-2
Molecular Formula: HO(C3H6O)nCH[CH2(OC3H6)nOH]2
25791-96-2 - Names and Identifiers
25791-96-2 - Physico-chemical Properties
| Molecular Formula | HO(C3H6O)nCH[CH2(OC3H6)nOH]2 |
| Density | 1.09 g/mL at 25 °C |
| Melting Point | -40 °C |
| Flash Point | >230 °F |
| Solubility | H2O: <0.01 % (w/w) at 25°C |
| Vapor Presure | <0.3 mm Hg ( 20 °C) |
| Vapor Density | >1 (vs air) |
| Specific Gravity | 1.088 |
| Refractive Index | n20/D 1.46 |
25791-96-2 - Risk and Safety
| WGK Germany | 3 |
| RTECS | TR5250000 |
25791-96-2 - Production method
It is prepared by polymerizing glycerol with propylene oxide under the action of a catalyst.
CHOHCH2OHCH2OH (a B c)CH3-CH-CH2OKOH,90~95℃04~05MPa
CH2-O(C3H6O)aHCH-O(C3H6O)bHCH2-O(C3H6O)cH
Add propylene oxide and glycerol to the polymerization kettle, and carry out heating polymerization reaction under KOH catalysis. After the reaction, the temperature is reduced to 60~70 ℃, the material is pressed into the neutralization kettle, and then a certain amount of water is added under stirring to dissolve the excess alkali in the material, and then H3PO4 is added at 60~70 ℃ for neutralization, and pH = 6~7 is adjusted. After neutralization, slowly raise the temperature to 110~120 ℃, vacuum dehydrate, and then filter to obtain the finished product.
Last Update：2024-04-10 22:29:15
25791-96-2 - Nature
| EPA chemical information | Glycerol polypropylene glycol triether (25791-96-2) |
Last Update：2024-04-09 01:59:51
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