- Oct 09, 2018-

SUNNYJOINT brand Vulcanizing agent DTDM

Chemical name: dithiodimorpholine

English name: Morpholine disulfide; 4,4'-dithiodimorpholine

Similar product names at home and abroad: DTDM, Sulfasan R, Vulnoc R

CAS registration number: [103-34-4]

Technical indicators:

Project indicator

Appearance White or light yellow powder

Melting point, °C ≥ 120

Heating loss, %≤ 0.5

Ash, %≤ 0.5

Total sulfur, % 25-29


Use characteristics: The relative density of this product is 1.32-1.38, soluble in ethanol, acetone, benzene, dichloroethane, insoluble in water and aliphatic hydrocarbons. Used as a natural rubber and synthetic rubber vulcanizing agent. Since the active sulfur can be released at the vulcanization temperature, the sulfur is a vulcanizing agent. The effective active sulfur content is about 27%. The operation is safe, even if it is combined with the alkaline furnace black, there is no scorch. The vulcanization rate is slow, and it can be used together with thiazole, thiuram and dithiocarbamate to increase the vulcanization rate. It works better with a small amount of sulfur. Salicylic acid can also promote the decomposition of this product and accelerate the vulcanization rate, but it will reduce the physical properties. This product does not spray, does not pollute, does not change color, and is easy to disperse. Vulcanized rubber is heat resistant, resistant to aging and has small deformation. Can also be used as a promoter. Mainly used in the manufacture of tires, butyl inner tubes, all kinds of heat-resistant rubber products, extra-thick special products and light-colored rubber products.

The best combination of DTDM curing system is as follows:

General dosage, part DTDM sulfur promoter CZ accelerator M accelerator TMTD accelerator D

Natural rubber 1-2 0.3-1.0 0.5 / / /

 0.7-2 0.5-1.5 / 0.4 / 0.3

 1-1.5 0-0.3 / / / 0.7

Nitrile rubber 1 1 / / / /

Butyl rubber 1.5 1 / 0-1.5 1-2 /

Note: The combustion temperature of this product is 140 °C, and the lower limit of combustion concentration is 20.5g/m3. There is a fire hazard when drying. Dust-air mixtures are at risk of explosion. It is moderately toxic. Store in a dark place to prevent decomposition. Avoid contact with skin and eyes.