Accelerator TMTD
Product name: TMTD
Chemical name: Tetramethyl thiuram disulfide
Structure:
CAS No.:137-26-8
Specification:
| Item | Granular | Powder | Oil powder |
| Appearance | White or greyish white granular | White or greyish white powder | White or greyish white oily powder |
| Initial melting point [≥ °C] | 142 | 142 | 142 |
| Loss on drying [≤ %] | 0.40 | 0.40 | 0.40 |
| Ash content [≤ %] | 0.30 | 0.30 | 0.30 |
| Residue on 100 mesh sieve [≤ %] | – | 0.1 | – |
| Granular diameter [mm] | 1.5-3 | – | – |
| Broken strength [N] | 2-5 | – | – |
| Oil content [%] | – | – | 1.0-2.0 |
What is TMTD?
TMTD (Tetramethylthiuram Disulfide) is a widely used sulfur-based accelerator in the rubber industry. It can function as a primary or secondary accelerator, as well as a sulfur donor, making it highly versatile for many sulfur-cured elastomers. TMTD is known for its fast curing characteristics, excellent scorch safety, and stable vulcanization plateau, delivering strong heat-aging and compression set resistance. It also provides good color retention in non-black rubbers and is particularly valuable as a secondary accelerator for EPDM. Additionally, in polychloroprene rubber, TMTD can act as a retarder when used with ETU, giving manufacturers precise control over vulcanization.
Properties:
TMTD (Tetramethylthiuram Disulfide) is a non-toxic, odorless compound, though it can cause irritation to the skin and respiratory tract. It has a specific gravity of 1.38–1.44. TMTD is soluble in chloroform, acetone, and benzene, slightly soluble in carbon tetrachloride and ethanol, and insoluble in water and gasoline.
Applications:
TMTD is a versatile accelerator for most sulfur-cured elastomers. It can be used as a primary or secondary accelerator or as a sulfur donor. It exhibits a relatively fast cure rate and provides a stable vulcanization plateau with excellent heat-aging and compression set resistance, especially in sulfurless and EV cure systems. In non-black vulcanization, it ensures good color retention. TMTD is a valuable secondary accelerator for EPDM and can also act as a retarder in the vulcanization of polychloroprene rubber when combined with ETU.
Packaging:
Available in 25 kg bags.
Storage:
Store in a tightly sealed container in a cool, dry, and well-ventilated area. Under normal conditions, the recommended maximum shelf life is 1 year.