Tris 4-hydroxy-2-methylphenyl

Tris[4-hydroxy-2-methylphenyl] Tellnronium Chloride2 A mixture of 4.0 g (37 mmol) of 3-methylphenol and 5.0 g (18 mmol) of tellurium tetrachloride in carbon tetrachloride is heated under reflux in an inert atmosphere for 30 h, and then allowed to cool. The mixture is filtered, the filter cake is washed thoroughly with carbon tetrachloride and benzene, the solid is extracted with acetone, and the residue is dissolved in methanol. The methanol solution is concentrated, the precipitate is collected, dissolved in methanol, and the product reprecipitated by the addition of acetone yield 2.2 g (25%) m.p. 188-192°. 

Tris[4-hydroxy-2-methylphenyl] Telluronium Bromide An excess of a solution of potassium bromide in methanol is added to a saturated methanolic solution of the telluronium chloride and mixed thoroughly. Diethyl ether is added to the mixture to complete precipitation of potassium chloride and excess potassium bromide. The mixture is filtered, the filtrate is concentrated under vacuum, and the residue is recrystallized from diethyl ether or acetone yield 90%, m.p. 180 183°. 

Obtained by partial methylation of 2,4,6-tri-hydroxy-3-methylphenyl 4-methoxybenzyl ketone,... 

Preparation by partial methylation of 2,4,6-tri-hydroxy-3-methylphenyl 2, 3-dimethoxybenzyl ketone with dimethyl sulfate in the presence of potassium carbonate in boiling acetone (69%) [5483],... 

Various polyesters derived from phosphorous or phosphoric acids were prepared. Efiicient polyphosphites were synthesised in the early 196(. Polyphosphite prepared from 152 and 4,4 -isopropylidenebis(cyclohexanol) was tested as a thermal stabilizer for PC [199] or as secondary AO for radiation sterilized EPM [200]. Built-in phosphites obtained by transesterification of triallcylphosphite with 4,4 -isopro-pylidenebisphenol or 4,4 -thiobisphenol possess antioxidant properties in polyolefins. Stabilizer containing phosphite moiety 153 was prepared from tris(2-hydroxy-ethyl)isocyanate, decyl alcohol and triphenylphosphite [201]. Various phosphites were derived firom polynuclear phenols or dihydric phenols. For example, a polycondensate prepared by reaction of phosphorus trichloride with 2,5-di-rert-butylhydroquinone was tested as heat and light stabilizer for PP [202], A linear polyester with a built-in phenolic moiety was synthesised from (2,6-di-tm-butyl-4-methylphenyl)bis(6-hydroxyhexyl)phosphite and dimethyl terephthalate [203]. 

Topanol CA 1,1,3-tri(3-ferf-butyl-4-hydroxy-6-methylphenyl)butane 1843-03-4... 

In the next stage, the enantioseparation of racemic 2-hydroxy-4-phenylbutyric acid with (T)-l-(4-methylphenyl)ethylamine was tried several solvents (dioxane, 4-methyl-2-pentanone, and water) were tried and a relatively higher resolution efficiency was observed with water which is economically and environmentally favorable. The addition of NaOH was also effective, and the highest resolution efficiency (0.76, 78% yield, 98% enantiomeric excess) was achieved when the molar ratio of the basic resolving agent/NaOH was 1/1 for racemate/water = 1/2.8. 

EINECS 254-996-9 1,3,5-Triazine-2,4,6(1H,3H,5H)-trione, 1,3,5-tris((4-(1,1-dimethylethyl)-3-hydroxy-2,6-di-methylphenyl)methyl)- ... 

For communication cable insulation. 2,2 -Thiobis-(4-methyl-6-ferf-butyl-phenol), 4,4 -thiobis-(3-methyl-6-tert-butyl-phenol), 2,2 -methylene-bis-(4-methyl-6-a-methylcyclohexyl-phenol), 1,1,3-tris-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane, 2,2 -thiodiethyl-bis-3-(3,5-di-rerr-butyl-4-... 

Compared to unmodified crystal polystyrene, impact polystyrene consisting of copolymers of styrene and butadiene are more sensitive to oxidation. This sensitivity is a consequence of the double bonds in polybutadiene component and manifests itself in yellowing and the loss of mechanical properties of the polymer. In impact polystyrene, the following antioxidants or their mixture are used in total concentrations of 0.1%-0.25% BHT, octadecyl-3-(3,5-di-fert-butyl-4-hydroxyphenyl)-propionate, l,l,3-tris-(5-tert-butyl-4-hydroxy-2-methylphenyl)-butane, and dilauryl thiodipropionate. 

Like impact polystyrene, acrylonitrile-butadiene-styrene copolymers (ABS) are sensitive to oxidation caused by the unsaturation of the elastomeric component. The processes for the manufacture of ABS require the drying (at 100°C-150°C) of powdery polymers that are extremely sensitive to oxidation. Thus, antioxidants have to be added before the coagulation step, normally in emulsified form, although sometimes in solution. The primary antioxidants are frequently sued together with a synergist. Primary anti-oxidants commonly used for ABS are BHT, 2,2 -methylenebis-(4-ethyl or methyl-6-tert-hutyl-phenol), 2,2 -methylenebis-(4-methyl-6-cyclohexyl-phenol), 2,2 -methylenehis-(4-methyl-6-nonyl-phenol), octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate, and l,l,3-tris-(5-tert-hutyl-4-hydroxy-2-methylphenyl)-butane. Important synergists are tris-(nonyl-phenyl)-phosphite and dilauryl thiodipropionate. These antioxidants are either liquids or show comparatively low melting points, which is an important prerequisite for the formation of stable emulsions. 

Hindered phenols do not show the above-mentioned disadvantages. They are the stabilizers of choice whenever good oxidation stabihty has to be coupled with good color stabihty and, possibly, food approval of the end article. The most important hindered phenols in use are the following NyN -hexamethylenebis-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionamide, l,l,3-tris-(5-tert-butyl-4-hydroxy-2-methylphenyl-butane, l,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-mesitylene, and BHT. The antioxidants can be added already during polycondensation, the normal concentration ranging from 0.3 to 0.7%. 

Methanone, [2-hydroxy-4-(isooctyloxy) phenyl] phenyl. See 2-Hydroxy-4-isooctoxybenzophenone Methanone, (2-hydroxy-4-methoxyphenyl) (4-methylphenyl)-. See Benzophenone-10 Methanone (2-hydroxy-4-methoxyphenyl) phenyl-. See Benzophenone-3 Methanone, [2-hydroxy-4-(octyloxy) phenyl] phenyl-. See Benzophenone-12 Methanone, phenyl (2,4,6-trimethylphenyl)-. See 2,4,6-Tri methyl benzophenone... 

Synonyms Benzenemethanol, a,a,4-trimethyl- 8-p-Cymenol p-Cymen-8-ol Dimethyl p-tolyl carbinol 8-Hydroxy-p-cymene a-Hydroxy-p-cymene p-(Hydroxyisopropyl) toluene 1-Methyl-4-(a-hydroxyisopropyl) benzene 1 -Methyl-4-(1 -hydroxy-1 -methylethyl) benzene 2-(4-Methylphenyl)-2-propanol p-Tolyl dimethyl carbinol 2-(p-Tolyl)-2-propanol a,a,4-Tri methyl benzenemethanol a,a,4-Trimethylbenzyl alcohol p,a,a-Tri methyl benzyl alcohol Empirical C10H14O... 

Tris (5-t-butyl-4-hydroxy-2-methylphenyl) butane. See 1,1,3-Tris (2-methyl-4-hydroxy-5-t-butylphenyl) butane... 

CAS 1843-03-4 EINECS/ELINCS 217-420-7 Synonyms 4,4, 4"-(1-Methyl-1-propanyl-3-ylidene) tris 2-(1,1-dimethylethyl)-5-methylphenol Phenol, 4,4, 4"-[1-methyl-1-propanyl-3-ylidene] tris 2-[1,1-dimethylethyl]-5-methyl- TPNC Tributylcresyl butane (INCI) 1,1,3-Tris (5-t-butyl-4-hydroxy-2-methylphenyl) butane... 

UVA 2-hydroxy-4-octyloxybenzophenone 2-hydroxy-4-methoxybenzophenone 2-(2H-benzotriazol-2-yl)-p-cresol 2-(2H-benzotriazole-2-yl)-4,6-di-tert-pentylphenol 2-(2H-benzotriazole-2-yl)-4-(1,1,3,3-tetraethylbutyl)phenol 2,4-di-tert-butyl-6-(5-chloro-2H-benzotriazole-2-yl)-phenol 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(octyloxy) phenol ethyl-2-cyano-3,3-diphenylacrylate HAS 1,3,5-tri-azine-2,4,6-triamine, N,N [1,2-ethane-diyl-bis[[[4,6-bis[butyl-(1,2,6,6-pentamethyl-4-piperidinyl)amino]-1,3,5-triazine-2-yl] imino]-3,1 -propanediyi] bis[N ,N -dibutyl-N ,N -bis(1,2,2,6,6-pentamethyl-4-piperidinyl)- bis(2,2,6,6-tetramethyl-4-piper-idyl) sebacate 2,2,6,6-tetramethyl-4-piperidinyl stearate N,N -bisformyl-N,N -bis-(2,2,6,6-tetramethyl-4-piperidinyl)-hexamethylendiamine alkenes, C20-24-.alpha.-, polymers with maleic anhydride, reaction products with 2,2,6,6-tet-ramethyl-4-piperidinamine 1,6-hexanediamine, N, N -bis(2,2,6,6-tetramethyl-4-piperidinyl)-, polymers with 2,4-di-ohloro-6-(4-morpholinyl)-1,3,5-triazine 1,6-hexanediamine, N,N -bis(2,2,6,6-tetramethyl-4-piperidinyl)-, polymers with morpholine-2,4,6-trichloro-1,3,5-triazine reaction products, methylated Phenolic antioxidants ethylene-bis(oxyethylene)-bis(3-(5-tert-butyl-4-hydroxy-m-tolyl)-propionate) 2,6,-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5,-triazine-2-ylamino) phenol pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) 2-(1,1 -dimethylethyl)-6-[[3-(1,1 -dimethylethyl)-2-hydroxy-5-methylphenyl] methyl-4-methylphenyl acrylate isotridecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate 2,2 -ethylidenebis (4,6-di-tert-butylphenol) 2,2 -methylenebis(4-ethyl-6-tertbutylphenol) 3,5-bis(1,1-dimethyethyl)-4-hydroxy-benzenepropanoic acid, C13-15 alkyl esters phenol, 4-methyl-, reaction products with dicyclopen-tadiene and isobutene Phosphite trinonylphenol phosphite isodecyl diphenyl phosphite... 

N,N -hexane-1,6-diylbis(3-(3,5-di-tert-butyl-4-hydroxy-phenylpropionamide)) 3,3 ,3 ,5, 5 ,5 -hexa-tert-butyl-a,a ,a -(mesitylene-2,4,6-triyl)tri-p-cresol 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6(1 H,3H,5H)- trione Phosphite bis-(2,4-di-t-butylphenol) pentaerythritol diphosphite tris (2,4-di-tert-butylphenyl)phosphite phosphoric acid, (2,4-di-butyl-6-methylphenyl)ethylester distearyl pentaerythritol diphosphite Optical brightener 2,2 -(2,5-thio-phenediyl)bis(5-tert-butylbenzoxazole)... 

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