RUBBER VULCANIZING ACCELERATOR (DM) Chemicals

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Tianjin
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25 m.t.
Supply Capability:
12000 m.t./month

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Product Description:

RUBBER VULCANIZING ACCELERATOR MBTS(DM)

Chemical Name: Dibenzothiazole disulfide
Molecular Formula: C14H8N2S4
Molecular Weight:332.50
CAS NO. : 120-78-5
 Executive standardGB/T 11408-2003
Specification: 


Item 

Index 

High-class products

First-class products

Acceptable end-product

Appearance(Visual inspection)

White or light yellow powder, granular 

Initial M.P, oC               ≥ 

170.0

166.0

162.0

Loss on drying, %      ≤ 

0.30

0.40

0.50

Ash, %                           ≤ 

0.30

0.50

0.70

Residues on 150μm sieve%                       ≤

0.00

0.10

0.10

Properties: white or light yellow powder (granule) with a little bitter, no poison. The density is 1.50, Melting point above 170℃,slightly soluble in benzene, chloroform and ethanol, is not soluble in water petrol. And ethyl acetate. Good storage stability.

Application: Given flat, moderately fast cures in NR and SR. Also used in a wide range of general purpose rubber. Non-staining and non-discolouring in "white" socks; used as a plasticizer and retarder in polychloroethylene rubber. Secondary acceleration is usually required for synthetic polymers. Better scorch safety than MBT.

Packaging: 20kg plastic woven bag, paper with plastic film bag, kraft paper bag or jumbo bag.

Storage: e product should be stored in the dry and cooling place with good ventilation, avoiding exposure of the packaged product to direct sunlight. The validity is 2 years.

Note: The product could be ultra fine powder based on customer accurate requirement. 


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Q:Chemistry why the catalyst can be equal to speed up the positive reaction rate
Since the catalyst only changes the activation energy and the amount of reactivity can be reduced, the amount of reaction energy is also reduced. Therefore, a positive catalyst is also a good catalyst for its reaction. Speed up the same multiple.
Q:What is a Catalyst?
catalyst is used to speed up the reaction but it does not react itself with reactant and remain unchanged
Q:Why are catalysts so effective in small amounts?
Catalysts don't get used up in reactions. Because of this, a single catalyst molecule can function again and again. Some catalysts are better than others for a given reaction. More effective catalysts reduce the time taken for 1/ the rate of travel of the molecule to the active site, 2/ the time the reaction takes, or 3/ the time it takes for products to diffuse away, or 4/ a combination of the above. The more effective a catalyst is in these factors, the less is needed to make it equally effective.
Q:What is the quality of the catalyst in the chemical reaction,and how much is the catalyst mass?
You can not calculate this question, the quality of the catalyst before and after the same reaction, how much reaction before the reaction on how much
Q:what is metallocene catalyst technology?
Metallocene catalyst A transition-metal atom sandwiched between ring structures having a well-defined single catalytic site and well-understood molecular structure used to produce uniform polyolefins with unique structures and physical properties. See also Catalysis; Coordination chemistry; Coordination complexes; Metallocenes; Organometallic compound. In the early 1980s, W. Kaminsky discovered that an appropriate co-catalyst activated metallocene compounds of group 4 metals, that is, titanium, zirconium, and hafnium, for alpha-olefin polymerization, attracting industrial interest. This observation led to the synthesis of a great number of metallocene compounds for the production of polymers already made industrially, such as polyethylene and polypropylene, and new materials. Polymers produced with metallocene catalysts represent a small fraction of the entire polyolefin market, but experts agree that such a fraction will increase rapidly in the future. See also Polymer; Polymerization; Polyolefin resins.
Q:What is the catalyst called?
Catalysts induce chemical reactions to change, cause chemical reactions to become faster or slower, or to react chemically at lower temperatures. The catalyst is also known as a catalyst in industry.
Q:Why the catalyst after the chemical reaction of its quality and chemical properties unchanged
The catalyst does not react directly with the reactants, so its mass remains constant.
Q:Before and after the reaction, the chemical properties and quality of the water did not change, and the water was the catalyst
3I2 + 3H2O = 3HI + 3HIO
Q:What are the methods of catalyst characterization?
Chemical means, according to the different detection methods, methods are different, but is to explain the chemical properties, chemical structure characteristics.
Q:Why is the catalyst in the chemical balance, the rate of change and balance?
But the positive reaction rate is accelerated, but also speed up the reverse reaction rate, the two increase the same multiple, so the system is still in a stable state, the same balance.

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