Thiuram disulfide, tetramethyl

All compositions contain EPDM, 100 phr zinc oxide, 5 phr stearic acid, 1 phr antioxidant, 1 phr 2-mercaptobenzothiazole (accelerator), 1.5 phr tetramethyl thiuram disulfide (accelerator), 1 phr and sulfur, 1.5 phr. 

TMTD Tetramethyl-thiuram disulfide Perkacit TMTD Flexsys... 

The chemistry of the vulcanization of rubber is complex. The reaction of rubber with sulfur is markedly expedited by substances called accelerators, of which those commonly known as mercaptobenzothiazole and tetramethyl-thiuram disulfide are examples ... 

Thiram or tetramethyl thiuram disulfide Dithio- carbamate Contact fungicide with protective action Control of mildew, rust, scab, and the like on fruits and seeds 11-27... 

However, 1,3-dithioles can be rearranged to 1,6,6aA4-trithiapentalenes, catalyzed by various sulfur-containing compounds, such as 1,2-dithiole-3-thiones,201 thioacetamide,202 phosphorus pentasulfide, elemental sulfur, dibenzylthiocarbamate, 2-mercaptobenzothiazole and tetramethyl thiuram-disulfide.203 (Scheme 14). This mechanism, however, cannot account for the... 

TM/ETD. [Akrochem] 60% Tetramethyl thiuram disulfide/40% tetraethyl thiu-ram disulfide rubber accelerator. 

TETRAMETHYL THIURAM DISULFIDE or N,iV,A/iV -TETRAMETHYL THIURAM DISULFIDE (137-26-8) Combustible solid (flash point 192 F/89X). Strong oxidizers may cause fire and explosions contact with strong acid or oxidizable materials forms toxic gases. 

Here some of the cis double bonds convert to trans double bonds. A cross-link bridge occurs for every approximately 50 sulfur atoms added. The hot vulcanization is accelerated by compounds such as zinc oxide, 2-mercaptobenzthiazole, or tetramethyl thiuram disulfide in industry. The mode of action of these compounds is not completely established however, they increase the sulfur utilization from 1/50 to about 1/1.5. 

Several researchers have concluded that both radical and polar mechanisms are operative and that the precise nature is dependent on the formulation. A typical accelerated sulfur system contains sulfur, accelerator, zinc oxide, and a saturated fatty acid such as stearic or lauric acid. Other additives can include stabilizers, antioxidants, and fillers such as silica or carbon black. There are also sulfur-free systems the most widely used sulfurless system is zinc oxide and tetramethyl thiuram disulfide. Additionally, other accelerators can be added to thiocarbamate systems to increase the induction time. The most widely used compound for this application is MET. Accelerated sulfur vulcanization has been found to consume the accelerator in the system at a rate far greater than the rate of cross-linking. This has led to the proposal that accelerated vulcanization proceeds through an intermediate. 

TMTD 80% Tetramethyl thiuram disulfide, 80% dispersion in EPDM/EVA base... 

Standard Malaysian rubber Tun Abdel Razak Research Centre N-Tef -butyl-2-benzothiazole sulfenamide Thermogravimetric analysis Tetramethyl thiuram disulfide Tetramethyl thiuram monosulfide Zinc 2-ethyl hexanoate... 

Med ENB Medium ethylidene norbornene TMQ Polymerised 2,2, 4-trimethyl-l, 2-dihydroquinoline DTPD N, N-diaryl-paraphenylene diamine FEF Fast extrusion furnace SRF Semi-reinforcing furnace MBT 2-Mercapto benzothiazole TMTDS Tetramethyl thiuram disulfide Tetrone A Dipentamethylene thiuram tetrasulfide ... 

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