TETRAMETHYLBISPHENOL A
4,4'-isopropylidenebis(2,6-dimethyl-phenol)
CAS: 5613-46-7
Molecular Formula: C19H24O2
TETRAMETHYLBISPHENOL A - Names and Identifiers
TETRAMETHYLBISPHENOL A - Physico-chemical Properties
| Molecular Formula | C19H24O2 |
| Molar Mass | 284.39 |
| Density | 1.074±0.06 g/cm3(Predicted) |
| Melting Point | 162-165 °C (lit.) |
| Boling Point | 420.6±40.0 °C(Predicted) |
| Flash Point | 190.2°C |
| Water Solubility | 3.17mg/L at 20℃ |
| Solubility | Chloroform (Slightly), Methanol (Slightly) |
| Vapor Presure | 0Pa at 20℃ |
| Appearance | Solid |
| Color | Off-White to Pale Brown |
| pKa | 10.60±0.10(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.575 |
| MDL | MFCD00068238 |
TETRAMETHYLBISPHENOL A - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| HS Code | 29072990 |
TETRAMETHYLBISPHENOL A - Reference Information
| LogP | 4.51 at 25℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | tetramethylbisphenol A can be used in the synthesis of diamine monomer 2, 2-bis [3,5-dimethyl -4-(4-aminophenoxy) phenyl] Propane (TBAPP). TBAPP is condensed with various dianhydrides in N,N-dimethylacetamide (DMAc) solvent, and the obtained polyamic acid is dehydrated and cyclized to polyimide under the action of heat. |
| production method | preparation method of tetramethylbisphenol A, comprising the steps of: 1), 2,6 dimethyl phenol, acetone, the main catalyst, auxiliary catalyst and mixed solvent are mixed to obtain a reaction solution, and the reaction solution is reacted at 20 ℃ ~ 60 ℃ to the end; 2), hydrophobic solvent is added to the reaction solution, heat up and dissolve, separate the oil layer, adjust the pH value of the oil layer to neutral and then wash to a conductivity of less than 50 μs/cm;3), cool the oil layer after treatment in 2), tetramethylbisphenol a crystal slurry is obtained, cooled, centrifuged, washed, dried and discharged to obtain tetramethylbisphenol A;4), 3) the excess and unreacted starting material 2,6 dimethylphenol was recovered after the mother liquor was treated, and the remaining residue was added with a hydrophobic solvent, and step 2)3) was repeated to obtain tetramethylbisphenol A. |
Last Update：2024-04-09 02:00:09
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