TETRAMETHYLBISPHENOL A

Name	4,4'-isopropylidenebis(2,6-dimethyl-phenol)
Synonyms	Bisxylenol A LABOTEST-BB LT00159397 TETRAMETHYLBISPHENOL A 4,4-isopropylidenedi-2,6-xylol 4,4'-Isopropylidenedi-2,6-xylenol 4,4-Isopropylidenebis(2,6-dimethylphenol) 4,4'-isopropylidenebis(2,6-dimethyl-phenol) 2,2-Bis(3,5-dimethyl-4-hydroxyphenyl)propane 4,4'-propane-2,2-diylbis(2,6-dimethylphenol) 2,2-Bis(4-hydroxy-3,5-dimethylphenyl)propane Phenol, 4,4'-(1-methylethylidene)bis[2,6-dimethyl- 3,3',5,5'-TetraMethyl-4,4'-dihydroxydiphenyl-2,2-propane 4,4'-Isopropylidenebis(2,6-dimethylphenol)Tetramethylbisphenol A
CAS	5613-46-7
EINECS	227-033-5
InChI	InChI=1/C19H24O2/c1-11-7-15(8-12(2)17(11)20)19(5,6)16-9-13(3)18(21)14(4)10-16/h7-10,20-21H,1-6H3

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

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

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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