2444-90-8

Usage

Hazard

Moderately toxic by ingestion and skin con- tact. A moderate skin and severe eye irritant.

Upstream product

• 80-05-7 BPA 

Downstream Products

• 131043-00-0 2,2,3,3-Tetrafluoro-3-(4-{1-methyl-1-[4-(1,1,2,2-tetrafluoro-ethoxy)-phenyl]-ethyl}-phenoxy)-propionic acid methyl ester 
• 131042-99-4 Dimethyl 3,3'-<(1-methylethylidene)bis(4,1-phenyleneoxy)>bis(2,2,3,3-tetafluoropropionate) 
• 131043-06-6 Dimethyl 3,3'-<(1-methylethylidene)bis(4,1-phenyleneoxy)>bis(2-chloro-2,3,3-trifluoropropionate) 
• 54395-52-7 4,4’-bisphenol A-bis-N-methylphthalimide 
• 38103-06-9 4,4'-bis(4,4'-isopropylidene diphenoxy)-bis(phthalic anhydride) 
• 52256-80-1 2,2-bis[4-(2,3-dicarboxyphenoxy)phenyl]propane dianhydride 
• 90139-53-0 1,1'-(1-methylethylidene)bis[4-[4-(phenylsulfonyl)phenoxy]benzene] 
• 54395-38-9 2,2-bis(4-hydroxyphenyl)propane bis(N-phenyl-3-phthalimidyl ether) 
• 110299-20-2 1,4-di<4-<1-methyl-1-(4-hydroxyphenyl)ethyl>phenoxy>tetrachlorobenzene 
• 131043-08-8 3,3'-<(1-Methylethylidene)bis(4,1-phenyleneoxy)>bis(2-chloro-2,3,3-trifluoropropanamide) 
• 131043-07-7 3,3'-<(1-Methylethylidene)bis(4,1-phenyleneoxy)>bis(2-chloro-2,3,3-trifluoropropanol) 

Relevant academic research and scientific papers

Vortex fluidic mediated synthesis of polysulfone

Polysulfone (PSF) was prepared under high shear in a vortex fluidic device (VFD) operating in confined mode, and its properties compared with that prepared using batch processing. This involved reacting the pre-prepared disodium salt of bisphenol A (BPA) with a 4,4′-dihalodiphenylsulfone under anhydrous conditions. Scanning electron microscopy (SEM) established that in the thin film microfluidic platform, the PSF particles are sheet-like, for short reaction times, and fibrous for long reaction times, in contrast to spherical like particles for the polymer prepared using the conventional batch synthesis. The operating parameters of the VFD (rotational speed of the glass tube, its tilt angle and temperature) were systematically varied for establishing their effect on the molecular weight (Mw), glass transition temperature (Tg) and decomposition temperature, featuring gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) respectively. The optimal VFD prepared PSF was obtained at 6000 rpm rotational speed, 45° tilt angle and 160 °C, for 1 h of processing with Mw ～10,000 g mol-1, Tg ～158 °C and decomposition temperature ～530 °C, which is comparable to the conventionally prepared PSF.

METHODS OF MANUFACTURE OF SALTS OF HYDROXY-SUBSTITUTED AROMATIC COMPOUNDS AND POLYETHERIMIDES

A method for the manufacture of a metal salt of a hydroxy-substituted aromatic compound comprises reacting a hydroxy-substituted aromatic compound with a base comprising a metal cation in an aqueous medium to provide a mixture comprising water and a metal salt of the hydroxy-substituted aromatic compound; contacting the mixture with a substantially water-immiscible solvent at a temperature greater than the boiling point of water at a prevailing pressure; introducing an optionally substituted C1-6 aliphatic alcohol; and removing water and the alcohol to provide a slurry comprising the metal salt of the hydroxy-substituted aromatic compound and the water-immiscible solvent.

Process for preparing dibasic salts of bisphenols

The present invention discloses a process for preparing dibasic salt of bisphenol from bisphenol and alkali, wherein the bisphenol and the alkali are reacted in a reaction medium consisting of an organic solvent or an aqueous inorganic salt solution, and then through filtration, a highly pure dibasic salt of bisphenol is directly obtained at a yield of higher than 90%.

Method for making salts hydroxy-substituted hydrocarbons

Disclosed is a method for preparing an alkali metal salt of a hydroxy-substituted hydrocarbon which comprises the steps of (i) contacting in solvent media at least one hydroxy-substituted hydrocarbon with a base comprising an alkali metal cation; and (ii) devolatilizing the solvent media comprising alkali metal salt by adding or spraying the solvent media into a substantially water-immiscible organic solvent, said solvent being at a temperature greater than the boiling point of solvent media at the prevailing pressure. In one embodiment the solvent media comprises water, and optionally at least one water-soluble protic organic solvent.

Process for preparing bis(ether anhydrides) using alkylamine derived bisimides having low melting temperatures

A process for making bis(ether anhydrides) employs alkylamines having low melting temperatures thus allowing for novel intermediate process steps for preparing bis(ether anhydrides). The alkylamines have alkyl groups which contain at least three carbon atoms and have boiling temperatures in the range of 48° to 250° C. at atmospheric pressure. As a result of using these amines, liquid alkylamines now can be employed in the imidization process step. The N-alkyl nitrophthalimides prepared from the recovered imidization product according to this invention can now be purified using liquid/liquid extraction or vacuum distillation. The alkyl nitrophthalimides prepared according to this invention provide for displacement reactions which now can be run at a high solids level. Likewise, the exchange reaction can be run at a higher solids level, and thus achieves an efficiency level which is higher than conventional processes.

CHLORINE-CONTAINING DIHYDROXY COMPOUNDS

The conditions (process time, concentration, and temperature) were determined for the synthesis of a series of dihydroxy compounds based on hexachlorobenzene, phenolphthalein, 9,9-bis(hydroxyphenyl)fluorene, di(4-hydroxyphenyl)methane, and 2,2-di(4-hydroxyphenyl)propane.The products are of interest as intermediates for the production of polymers with increased fire resistance.

Process for preparing alkali metal salts of hydroxyaromatic compounds

Anhydrous alkali metal (especially sodium) salts of hydroxyaromatic compounds, particularly bisphenols such as bisphenol A, are prepared by forming a solution of the hydroxyaromatic compound in a solvent mixture comprising a relatively high boiling non-polar organic liquid such as toluene or o-dichlorobenzene and an alkanol containing up to about 4 carbon atoms, preferably methanol; contacting said solution with an aqueous solution of a substantially stoichiometric amount of alkali metal hydroxide; and removing substantially all volatile materials from the reaction mixture by evaporation. The product thus obtained is a slurry of the anhydrous alkali metal salt in the non-polar liquid.

Method for making substantially anhydrous alkali metal bisphenol salts

A method is provided for making substantially pure anhydrous sodium salts of aromatic bisphenols, such as the disodium salt of 2,2-bis(p-hydroxyphenyl)propane. Rapid separation of water from a sodium salt of an aromatic bisphenol hydrate, or as an aqueous mixture having stoichiometric quantities of sodium hydroxide and bisphenol has been found to provide substantially pure anhydrous bisphenol alkali metal salts useful as intermediates for making polyetherimides.