4,4 -Thiobis 3-methyl-6-tert

The samples investigated initially were commercial high pressure low density, linear low density and high density polyethylenes and had properties given in Table 1. Solutions of these polymers were prepared in concentrations of 0.8 to 3.5 g/1 by dissolving the pol5rmer over a time period of two hours in an oven maintained at 145°C. To avoid degradation 0.05% 4,4 -thiobis(3-methyl-6-tert-butyl phenol) was used as an antioxidant in the solutions. 

SYNS BIS(3-tert-BU1TL-4-HYDROXY-6-METHYL-PHENYL) SULFIDE BIS(4-HYDROXY-5-tert-BUTyL-2-METHYLPHENYL) sulfide DISPERSE MB-61 SANTONOX SANTOVC HITE CRYSTALS THIOALKOFEN BM 4 4,4 -THIOBIS(2-tert-BUTYL-5-METHYLPHENOL) 4,4 -THIOBIS(6-tert-BUTYL-3-METHYLPHENOL) 4,4 -THIOBIS(3-METHYL-6-tert-BUTYLPHENOL) l,l -THIOBIS(2-METHYL-4-HYDRO-XY-5-tert-BUTYLBENZENE) USAFB-15 YOSHINOX S... 

THI0BIS(D0DECYL PROPIONATE) see TFD500 1,T-THI0BISETHANE see EPHOOO 4,4 -THIOBIS(3-METHYL-6-tert-BUTYLPHENOL) see TFC600... 

The copper catalyzed degradation of E-P copolymer (3-40 mol% C2H4) is prevented [117] by azimidobenzene or phenothiazine or their derivatives and 0.1-5 wt.% [4,4 -thiobis(3-methyl-6-tert-butylphenol)] and iV-phenyl-p-naphthyl-amine. The later two compounds are powerful antioxidants and functions as follows ... 

Synonyms/Trade Names 4,4 -Thiobis(3-methyl-6-tert-butylphenol) ... 

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-... 

A typical application of the procedure is given below, viz. the determination of down to 0.01% of Santonox R (4,4 -thiobis-3-methyl-6-tert-butyl phenol) in polyethylene. As this procedure determines Santonox R only in its reduced form it does not include any Santonox R which may be present in the oxidized form in the original polymer, for example produced by atmospheric oxidation of the additive during polymer processing at elevated temperatures. Total reduced plus oxidized Santonox R can be determined by ultraviolet spectroscopic procedures, for example, the differential procedure described later (Method 6) and oxidized Santonox can then be obtained by difference from the two methods. Alternatively, total unoxidized plus oxidized Santonox R can be determined by the direct ultraviolet spectroscopy. 

A new method is described for the quantitative determination of some sulphur-containing antioxidants in PE. The polymer matrix is dissolved in hot n-heptane/ isopropyl alcohol, 97/3 v/v at 160 deg.C under elevated pressure (0.33 MPa) and precipitated by cooling. The solution is injected directly into a normal-phase silica gel column flushed with the same solvent as used for the dissolution of the polymer. This method gives high recovery of the antioxidants, good repeatability of the analysis and a low detection limit of 0.011 mg 4,4 -thiobis(3-methyl-6-tert-butylphenol) (Santonox R) /I g PE 0.074 mg ditetradecyl-beta,beta -thiodipropionate (Chimox 14) / 1... 

J-tert-Butyl-4-hydroxy-5-methylphenyl sulfide o-Cresol, 4,4 -thiobis[6-tert-butyl- (8), Phenyl, 4,4 -thiobis[2-(1,1-dimethylethyl)-6-methyl- (9),... 

Stabilizers UVA 2(2 -hydroxy-5-methylphenyl)benzotriazole Screener carbon black HAS bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-2-n-butyl-2-( 3,5-di-tert-bulyl-4-hydroxy-benzyl) malonate Phenolic antioxidants phenol, 4-methyl-, reaction products with dlcyclopentadiene and isobutene 2,6,-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5,-triazine-2-ylamino) phenol 2- (1,1 -dimethylethyl)-6-[[3-(1,1 -dimethylethyl)-2-hydroxy-5-methylphenyl] methyl-4-methylphenyl acrylate isotridecyl- 3- (3,5-di-tert-biAyl-4-hydroxyphenyl) propionate 3,5-bis(1,1-dimethyethyl)-4-hydroxy-benzenepropanoic acid. Cl 3-15 alkyl esters 2,2 -isobutylidenebis(2,4 imethylphenol) Amine nonylated diphenylamine Thiosynergist 2,2 -thiobis(6-tert-butyl-4-methylphenol) 4,6-bis(octylthiomethyl)-o-cresol ... 

Alternative names - 4,4 -Thiobis(6-tert-butyl-m-cresol), Di(2-methyl-4-hydroxy-5-tert-butylphenyl)thioether... 

Thiobis[2-(2-tert-butyl-m-cresol) Phenol, 4,4 -thiobis[2-(1,1 -dimethyl-ethyl)-3-methyl- (4120-97-2), 76, 201, 202... 

Oxidative coupling was used for the synthesis of some stabilizers having properties of AO or FR. Products of oxidation of 4,4 -isopropylidenebis(2-methyl-6-tert-butylphenol with pota ium ferricyanide [151] or of 4,4 -thiobis(2-rcr/-butyl-5-methylphenol) with oxygen in the presence of copper salts [152] (118) were tested as AO. Thermostable fireproofing additives containing 1 to 4 bromine atoms on a phenolic moiety and designed for the stabilization of thermoplastics, e.g. 119, were prepared by oxidative coupling of brominated phenols [153]. 

Important information about the transformation of thiobisphenols under the conditions of inhibited oxidation were obtained on the basis of product analysis of model reactions. The detailed investigation was carried out with 4,4 -thiobis(2-methyl-6-tert-butylphenol) (CLXVIIIa), which is among the most effective thiobis-phenolic antioxidants and tert-BuOOH was chosen as a simple model of polypropylene hydroperoxide. The reaction was followed at 20 °C in benzene solution and in the presence of the catalytic amount of Co(II)acetylacetonate272). Under these conditions, the phenolic antioxidant was attacked by both alkylperoxyls and hydro-... 

Thiobis(2-methyl-4-hydroxy-5-tert-butyl benzene) ... 

In the case of thirteen LDPEs used in order to study the memory effects, the samples with various shearing histories were prepared hy changing shear working time. The shear working was performed with a Brahender plasticorder equipped with No. 5 rotor at 50 rpm rotor speed. Prior to the shearing with the Brahender, 2000 ppm of if,ii -thiobis (3 methyl-6-tert-butylphenol) was added to the materials in order to prevent them from thermal oxidation. 

Dobies [35] has described detailed procedures for determining various antioxidants in PE and PP films. A feature of this method is that it requires only a small polymer sample (5 g) for the determination of down to 0.02% antioxidant compared to sample sizes of up to 1 kg in previously reported procedures. They describe the extraction procedure used for isolating the antioxidants from the polyolefins, the TLC separation of various antioxidants used industrially, and a quantitative determination of the antioxidant to detect 0.02-0.20% of an antioxidant by the use of the double beam scanning densitometer. The six antioxidants he studied were 4,4 -butylidene (2-tert-butyl-5-methyl)phenol 4,4-thiobis(6-tcft-butyl-m-cresol) pentaerythritol tetrakis(3,5-di- er -butyl-4-hydroxyhydrocinnamate) 2,2 -methylenebis(4-methyl-6-tcft-butylphenol) octadecyl (3,5-di-tert-butyl-4-hydroxyphenyl) acetate and 2,6-di-tert-butyl-p-cresol. 

Thiobis(2-methyl-6-butylphenol) Thiodiethylene bis(3,5-di-tert-butyl-4-hydroxycinnamate) 4,6-Bis(octylthiomethyl)-o-cresol Reaction product of nonylphenol, dodecanethiol, and formaldehyde... 

Cl 3-15 alkyl esters 2,2 -isobutylidenebis(2,4-dimethylphenol) 1,1,3-tris(2 methyl-4 -hydroxy-5 tert-butylphenyl)butane Phosphite bis-(2,4-di-t-butylphenol) pentaerythritol diphosphite tris (2,4-di-tert-butylphenyl)phosphite trinonylphenol phosphite distearyl pentaerythritol diphosphite trilauryl trithiophosphite Thiosynergist didodecyl-3,3 -thiodipropionate dioctadecyl 3,3 -thiodipropionate 2,2 -thiodiethylene bis(3-(3,5-ditert-butyl-4-hydroxyphenyl)propionate] 4,4 -thiobis(2-t-butyl-... 

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