Methyl 0-thiodipropionate

Methyl-1-tetralone, 35, 96 Methyl-2-thienyl sulfide, 35, 85 Methyl /3-thiodipropionate, 30, 65... 

The peroxide decomposer will drastically reduce the number of radicals, which can then be more effectively mopped up by the chain-breaking materials. A widely used combination is 4-methyl-2,6,di-t-butylphenol and dilauryl thiodipropionate. It is possible to envisage most powerful combinations where a chain-breaking antioxidant, a regenerating agent, a peroxide decomposer, a metal deactivator and an ultraviolet absorber are all employed together. 

Thiodipropionic acid-bis-[3,5-bis-(2,3-dihydroxypropyl JV-methyl-carbamoyl)-2,4,6-triiodoanUide analogues... 

METHYL p-THIODIPROPIONATE (Propionic acid, P,P -thiodi-, dimethyl ester)... 

Methylquinoxaline, 30, 88, 89 fi aws-Methylstyrylcarbinol, 30, 77 Methyl 0-thiodipropionate, 30, 65 Michael condensation between 2-nitro-propane and methyl acrylate, 32, 86 Monochlorourea, 30, 24, 25, 26 Monoethanolamine, 32, 19 Mucobromic acid, 32, 95... 

Effect of a Phenolic Antioxidant. The rate of decomposition of a solution containing the hydroperoxide (5.0 X 10 2 mole/liter) dilauryl thiodipropionate (2.5 X 10 2 mole/liter) and l,l,3-tris(2 -methyl-5 -fert-butyl-4 -hydroxyphenyl) butane (2.5 X 10"2 mole/liter) at 80°C. was identical with that containing no phenolic compound. In addition no formation of polymer was observed when solutions of Tetralin hydroperoxide and dilauryl thiodipropionate were allowed to react at 70 °C. in sealed tubes in the presence of inhibitor-free acrylonitrile in nitrogen... 

Some sulfur containing polyesters having properties of synergistic AO were described, like a product formed from 2-(2-hydroxyethylthio)-l-methyl-4-[2-(2-hydroxyethylthio)-l-methylethyl]cyclohexane and dimethyl 3,3 -thiodipropionate [183] (141), an esterification product of 3-n-dodecylthiopropionic add with poly(ethylene ycol) [184] (142) or a polycondensate of sebacoyl chloride with 4,4 -dimercaptodiphenyl sulfide [185]. 

Fig. 1 Use of polymer-coated silica stationary phase with a neat carbon dioxide mobile phase. Column Deltabond SFC Methyl (150 X 2.0 mm) mobile phase CO2 pressure gradient 75 bar initial for 2 min, then 50 bar/min ramp to 180 bar, then 15 bar/min ramp to 300 bar flow 0.5 mL/min temperature 100°C injection 5 jjlL detection flame ionization detector sample solvent methylene chloride. Peak key 1 BHT 2 dimethyl azelate 3 triethyl citrate 4 tributyl phosphate 5 methyl palmitate 6 methyl stearate 7 diethylhexyl phthalate 8 Tinuvin 327 9 Spectra-Sorb UV531 10 tri(2- ethylhexyl) trimellitate 11 dilauryl thiodipropionate ...

In an alcoholic solution of sodium acetate trihydrate, hydrogen sulfide adds to methyl acrylate to give dimethyl /3-thiodipropionate."... 

Sodium petroleum sulphonates or calcium dinonylnaphthalene sulphonate can be applied as rust preventing additives and the catalytic effect of copper can be retarded by 2-mercaptobenzothiazole. Depending on operating temperature, various oxidation inhibitors may be used. Thus, 2,6-di-fert-butyl-4-methyl phenol is an effective inhibitor below 120 C while phenyl-alpha-naphthylamine is widely used in greases at low temperatures and above 120" C and phenothiazine is effective especially at temperatures above 150" C. Special compounds used as oxidation inhibitors for greases in the food industry are dilauryl thiodipropionate or citric acid. 

Prior to irradiation, some extracted films were immersed in hexane solutions of stabilizers for 15 h. After removal, rinsing and drying the film, the absorbed stabilizer levels were quantified by IR spectroscopy using the 1738 cm-1 ester band in all cases. The stabilizers employed included 1,2,2,6,6-pentamethyl-4-piperidyl octadecanoate (StNCH3), 2,2,6,6-tetramethyl-4-piperidyl-N-oxyl (StNO ), octadecyl e-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionate (AOX) and d1-octadecyl 3,3 -thiodipropionate (DSTDP). Subsequent to irradiation, some films were subjected to treatment by overnight immersion in a solution of a spin trap (2-methyl-2-nitrosopropane, 0.024 mol L-1 in hexane) or in an atmosphere of a reactive gas (SF4 or S02) to selectively derivitize the polymeric products (8). 

Dimethyl 3,3 -thiodipropionate (yield 71-81%)7 and bis-(2-cyanoethyl) sulfide (yield 86-93%)8 are respectively obtained analogously by adding hydrogen sulfide to methyl acrylate in the presence of sodium acetate and to acrylonitrile with catalysis by Triton B (benzyltrimethylammonium hydroxide). 

For power cable insulation. Pentaerythrityltetrakis-3-(3,5-di-ferf-butyl-4-hydroxyphenyl)-propionate, polymeric 2,2,4-trimethyl-1,2-dihydroquino-line, 4,4 -thiobis-(3-methyl-6-rerr-butyl-phenol), 2,2 -thiodiethyl-bis-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate, and distearyl thiodipropionate are used as synergists. 

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. 

Divinylene oxide. SeeFuran DLT DLTDP DLTP. See Dilauryl thiodipropionate DMA. 5eeN,N-Dimethylaniline DMAE. See Dimethylethanolamine DMAEMA. See Dimethylaminoethyl methacrylate DMAMP. See Dimethylaminomethyl phenol 2-Dimethylamino-2-methyl-1-propanol... 

Synonyms Bis (2-methoxycarbonylethyl) sulfide p,p-Dicarbomethoxydiethyl sulfide Dimethyl 3,3 -thiodipropionate DMTDP Propanoic acid, 3,3 -thiobis-, dimethyl ester Propionic acid, 3,3 -thiodi-, dimethyl ester 3,3 -Thiobis (methyl propionate) Thiodipropionic acid, dimethyl ester Empirical C8H14O4S Formula S(CH2CH2COOCH3)2 Properties M.w. 206.26 b.p. 130 C (1-2 mm)... 

Thiobis (3-methyl-6-t-butylphenol) 1,1 -Thiobis (2-methyl-4-hydroxy-5-t-butylbenzene). See4,4 -Thiobis-6-(t-butyl-m-cresol) 3,3 -Thiobis (methyl propionate). See Dimethyl thiodipropionate... 

N-Lauroyl-p-aminophenol 2,2 -Methylenebis (6-t-butyl-4-methylphenol) 2,2 -Methylenebis 6-(1-methylcyclohexyl)-p-cresol 2,2 -Methylenebis (4-methyl-6-cyclohexylphenol) 2,2 -Methylene bis (4-methyl-6-nonylphenol) Nonylphenol 2,2 -Oxamidobis [ethyl 3-(3,5-di-t-butyl-4-hydroxyphenyl) propionate] Pentaerythrityl alkyl thiodipropionate Stearyl lauryl thiodipropionate 4,4 -Thiobis-6-(t-butyl-m-cresol)... 

Phenol, 4,4 -thiobis 2-(1,1-dimethylethyl) phosphite Poly (1,4-cyclohexylenedimethylene 3,3 -thiodipropionate terminated with 1-octadecanol 2,2 -Thiobis-(6-t-butyl-4-methyl phenol) antioxidant, polyolefins Bis [3,3-bis (4-hydroxy-3-t-butylphenyl) butanoic acid], glycol 1,2-Bis (3,5-di-t-butyl-4-hydroxyhydrocinnamoyl) hydrazine 2,2-Bis (4-2-(3,5-di-t-butyl-4-... 

Ditridecyl thiodipropionate Glycerin Glyceryl cocoate Hydrogenated lanolin Hydrogenated tallow glyceride lactate Isopropyl laurate Meroxapol 105 Meroxapol 172 Meroxapol 174 Meroxapol 251 Meroxapol 252 Meroxapol 254 Meroxapol 258 Meroxapol 311 Methoxy PEG Methyl cocoate Methyl hydroxyethylcellulose Octyidodecyl myristate PEG-20 PEG-75 PEG-150 PEG-8 dilaurate PEG-20 hydrogenated castor oil PEG-60 lanolin PEG-300 oleate... 

Acetylated palm kernel glycerides Butyl cyclohexyl phthalate Butyl stearate Dicapryl adipate Dicapryl phthalate Dimethyl phthalate Distearyl thiodipropionate Ditridecyl thiodipropionate Glyceryl stearate SE Glycol distearate Hydroabietyl alcohol Jsooctyl stearate Magnesium glycerophosphate Methyl cocoate Mineral oil... 

Butyl stearate Cocoyl hydroxyethyi imidazoline Distearyl thiodipropionate Ditridecyi thiodipropionate isostearyi ethylimidonium ethosuifate Methyl alcohol . PEG-18 castor oil PEG-150 laurate PEG-4 oleate PEG-75 oleate PEG-150 oleate PEG-10 stearamine PEG-4 stearate Pine (Pinus paiustris) tar Soyamine 3,5,5-Trimethylhexan-1-oi softener, polishes Isostearyl hydroxyethyi imidazoline softener, polymers Diisodecyl adipate... 

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