TETRAMETHYLTHIURAM

EPM/EPDMcompounding pLASTOTffiRS, SYNTTiETIC - ETTiYLENE-PROPYLENE-DIENE RUBBER] (Vol 8) Tetramethylthiuram disulfide (TMTD) [137-26-8]... 

Evaluations have been conducted using deer, a multiple-choice preference-testing apparatus, and tetramethylthiuram disulfide [137-26-8] (TMTD) (29) or the fungicide thiram as a standard repeUent for competitive tests with repeUent-treated food (78). 

MET, mercaptobenzothiazole TMTM, tetramethylthiuram mono sulfide TMTD, tetramethylthiuram disulfide and CBTS, Al-cyclohexyl-2-benzothiazole... 

Tellurium dimethylthiocarbamate in combination with mercaptoben2othia2ole, with or without tetramethylthiuram disulfide, is the fastest known accelerator for butyl mbber. It is used extensively in butyl tubes for buses and similar vehicles and in other butyl appUcations (see Elastomers, synthetic Rubber, natural). 

Ethylenethiourea reacts to form monosulftde cross-links (117). A number of alternative curatives have been proposed to avoid use of ethylene thiourea. These iaclude polyhydric phenols (118), hydroxyphenyl and mercapto substituted tria2oles (119), thiolactams (120), thia2o1idinethiones as Vulkacit CRV (121), and alkanethioamides (122). Among these, Vulkacit CRV is the most widely used. An accelerator is ordinarily used ia combination with a retarder to control premature cross-linking. Tetramethylthiuram disulfide [137-26-8] is ordinarily used for this purpose when the accelerator is either ethylenethiourea [96-45-7] or a thia2o1idinethione. 

Although these curative systems may also be used with the polyepichlorohydrin elastomers containing AGE, the polymers were developed to be cured with conventional mbber curatives, sulfur, and peroxides. These polymers containing the pendent aHyl group are readily cured with a typical sulfur cure system such as zinc oxide, and sulfur along with the activators, tetramethylthiuram mono sulfide [97-74-5] (TMTM) and... 

There are no known practical peroxide cure systems for the PO—AGE polymers. Apparentiy the peroxide attacks the polymer backbone at a rate that is unfavorably competitive with the cross-linking rate. A typical sulfur cure system consists of zinc oxide [1314-13-2] tetramethylthiuram mono sulfide (TMTM), 2-2-mercaptobenzothiazole [149-30-4] (MBT), and sulfur. A sulfur donor cure system is zinc oxide, di-o-tolylguanidine [97-39-2] (DOTG) and tetramethylthiuram hexasulftde. 

By reduction in the degree of polymerisation. To produce processable rubbers the original polymers are masticated with substances such as benzothiazole disulphide and tetramethylthiuram disulphide. The more severe degradation techniques to produce liquid polysulphides are mentioned below. 

Sulfur has also been added to the condensation product of enamines with cyanoacetic ester (575) and directly to enamines (576). A 2H-l,3-dithiol-2-thione was obtained from morpholinocyclohexene and tetramethylthiuram disulfide (577). 

Previous reactions of FeClg and tetramethylthiuram disulfide and [Fe(R2dtc)s] or [Fe(R2dtc)2Cl] with CI2 or Br2 resulted in the formation of complexes of the following type. Iron(IV) and iron(II) complexes con-... 

While the action of various accelerators is not altogether clear, many of them (tetramethylthiuram disulfide, for example) may decompose with the release of radicals which accelerate step (i). Others (e.g., the diphenylguanidine type) appear to promote the normal reactions of sulfur, perhaps by catalyzing the conversion of cyclic sulfur (Ss) to a more soluble and reactive form.2 >27 efficiency of sulfur utiliza-... 

TBAH Tetrabutylammonium hydroxide TMTD Tetramethylthiuram disulfide... 

An accelerator similar in properties to tetramethylthiuram disulphide, except that it cannot be used without added sulphur. 

Tetramethylthiuram disulphide (TMTD) has proved to be a useful reagent for the thiocarbamoylation of amine containing compounds. Thus, reaction of a series of hydrazones of aromatic aldehydes with TMTD in a 1 1 ratio gave amongst other products, 4,4-dimethylthiosemicarbazide 86 and 5-dimethylamino-l,3,4-thiadiazole-2-thiol 85. It was confirmed that 86 was an intermediate in the synthesis of 85 as treatment of 86 with TMTD gave 85 in 85% yield <00RCB344>. 

Tetramethylolmethane, pi 9 2,2,4,4-Tetramethyl-3-thiapentane, dl47 Tetramethylthiuram disulfide, bl83... 

Tetramethylphosphonium chloride, 19 20 Tetramethylsuccinonitrile (TMSN), 17 241 Tetramethylthiuram disulfide (TMTD), 21 794... 

The authors describe experiments on six NR compounds commonly used for latex gloves to determine the potential hazards of skin contact with reference to curing compounds and accelerators, including mercaptobenzthiazole and zinc dialkyldithiocarbamates. Simulation methods and the influence of a common hand disinfectant were investigated. In the case of tetramethylthiuram disulphide, it was discovered that decomposition products could be formed on the skin which are not present in the original rubber. 6 refs. Articles from this journal can be requested for translation by subscribers to the Rapra produced International Polymer Science and Technology. Accession no.849747... 

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