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:Is the chemical reaction rate constant related to the amount of catalyst used?
In fact, the catalyst is to participate in the reaction (junior high school textbooks do not respond is to allow students to understand), but the reaction to the final return to the original state.
Q:What is the difference between electrocatalysis and general chemical catalysis?
General chemical catalysis is a catalyst, and electrocatalysis also need to be carried out under the conditions of the electric field
Q:Why does the chemical and chemical properties change before and after the reaction?
Catalysts are homogeneous catalysts with heterogeneous catalysts. The heterogeneous catalyst exhibits a reaction in a different phase (e.g., a solid catalyst in a liquid mixing reaction) and a homogeneous catalyst is a reaction in the same phase (for example, a liquid catalyst in a liquid mixing reaction). A simple heterogeneous catalytic reaction involves the addition of a reactant (or en-ch: substrate; zh-tw: subject) adsorbed on the surface of the catalyst, and the bond within the reactant causes a new bond due to the fragility of the bond, But because of the product and the catalyst between
Q:Can a catalyst react with a reactant?
Exactly no. A catalyst just provides a shortcut to a reaction and thats is by combining with the reactant and at end of reaction it splits from the reactant it combined with.if a catalyst reacts then it is not a catalyst
Q:Is the catalyst considered a chemical reaction?
The catalyst is involved in the reaction, but in the reaction process is a step in the effect of its shape has not changed, so that did not participate in the reaction.The role of the catalyst is to reduce the activation energy of the reaction, the original one reaction into two or Multiple reactions, each sub-reaction of the activation energy is very low, the reaction is very good, the effect is the total reaction faster. Hope to adopt
Q:Who knows hydrogen and nitrogen in the high temperature of ammonia chemical equation ah?
3H2 + N2 ===== 2NH3 conditional catalyst
Q:Which chemical reaction is added to the catalyst in order to slow down the reaction
CaC2 and water reaction to ethylene plus salt water (slow chemical reaction rate)
Q:NH3 and O2 in the presence of catalyst in the chemical reaction occurred how to write,
4NH3 + 5O2 == 4NO + 6H2O
Q:In the chemical calculation, the quality of the catalyst should not be counted before and after the reaction
It is not the same .. because the quality of the catalyst will not change .
Q:What are the properties of the catalyst (eg, specificity)?
The composition, chemical properties and quality of the catalyst itself do not change before and after the reaction; its relationship with the reaction system is as highly selective (or specific) as the relationship between the lock and the key. A catalyst is not for all Chemical reactions are catalyzed, for example, manganese dioxide in the thermal decomposition of potassium chlorate in the catalytic role to speed up the chemical reaction rate, but other chemical reactions do not necessarily have a catalytic effect.Some chemical reaction is not only a single catalyst, such as potassium chlorate Thermal decomposition can play a catalytic role in the magnesium oxide, iron oxide and copper oxide and so on.

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