RUBBER VULCANIZING ACCELERATOR MBS RUBBER CHEMICALS

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Tianjin
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TT OR LC
Min Order Qty:
25 m.t.
Supply Capability:
12000 m.t./month

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Product Description:

RUBBER VULCANIZING ACCELERATOR NOBS(MBS)

Chemical NameN-Oxydiethylene-2-Benzothiazole Sulfenamide
 Molecular formula: C11H12N2S2O
 Molecular Weight:253.35
CAS NO. : 102-77-2 
Executive standardGB/T 8829-2006
Specification: 


Item 

Index

High-class products

First-class products

Acceptable end-product

Appearance
(Visual inspection)

Faint yellow or orange granules 

Initial M.P, oC        ≥ 

81.0

80.0

78.0

Loss on drying, %     ≤ 

0.40

0.50

0.50

Ash, %                    ≤ 

0.20

0.30

0.40

Insoluble in Methanol%        ≤

0.50

0.50

0.80

Free amine,%        ≤ 

0.50 

Purity,%                 ≥ 

95.0 

Properties: Faint yellow to brown lamellae. 80°C melting point.soluble benzene; carbon tetrachloride; ethyl acetate; ethanol, soluble in dichloromethane; acetone, less petrol, do not dissolve in water. Heating gradual decomposition. 

ApplicationIt'after-effect quick accelerator. Scorching time is longer and the processing safety is good.

Packing: 25kg paper bag inner with PE bag

Properties: The product should be stored in the dry and cooling place with good ventilation . The product should be avoid hot sunshine. 

 


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Q:Effect of Catalyst on Chemical Reaction Rate
The catalyst can reduce the activation energy of the chemical reaction and allow the reaction to take a shortcut
Q:What are the differences between biological catalysts and chemical catalysts?
Biological catalyst: 1. Biological catalysts or enzymes are high molecular weight globular proteins. 2.Their composition may change at the end of reaction. 3.Their catalyzing effect is very high. i.e faster than chemical catalyst. 4.They are reaction specific. i.e One enzyme or biological catalyst may catalyze only particular type of reaction and not many. 5.They are intolerant to temperature and pH changes. An enzyme can not function outside its temperature or pH range. e.g amylase,lipase,pepsin Chemical catalyst: 1.Chemical catalysts are simple inorganic molecules with low molecular weight. 2.They remain unchanged at the end of reaction. 3.They are slower compared to enzymes. 4.They are not reaction specific. 5.They function within wide range of temperatures,pH or pressure. e.g vanadium dioxide, platinum
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:What is the difference between the conditions in the iron as a catalyst can not be reacted with toluene to produce tribromotoluene?
The concentrated bromine water is a bromine aqueous solution and the liquid bromine is pure bromine. Only liquid bromine can produce tribromotoluene, and to add iron powder as a catalyst, and the main production is to lead bromotoluene and p-bromotoluene, tribromotoluene this content is very small.
Q:What is chemical adsorption and its relationship with heterogeneous catalysis
The catalytic cycle includes five steps: diffusion, chemical adsorption, surface reaction, desorption and reverse diffusion.The chemical adsorption is an important part of the heterogeneous catalysis process, and the adsorption of the reactants on the catalyst surface,
Q:The chemical reaction equation of methanol heating and oxygen in the presence of catalyst
2CH3OH + O2 === 2HCHO + 2H2O
Q:Which of the following are true about catalysts?
1, 3, 5, 6, 7. 2 is incorrect, catalysts are written above the reaction arrow. 4 is incorrect, catalysts decrease the activation energy thus increasing the rate of reaction (see 7) 8 is incorrect, catalysts are not used up (or if they are, they are also regenerated by a different reaction so that they maintain a constant concentration). edit: about 5, yes i think the answer below is correct, 5 is false actually. catalysts speed up both the forward and the reverse reaction so the equilibrium constant is unchanged. however, 1 is true i think: catalysts can provide a lower energy pathway by way of bringing the reactants together in the correct orientation (rather than random orientations).
Q:Catalyst & an exothermic reaction?
Catalysts work by providing an (alternative) mechanism involving a different transition state and lower activation energy. The effect of this is that more molecular collisions have the energy needed to reach the transition state. Hence, catalysts can perform reactions that, albeit thermodynamically feasible, would not run without the presence of a catalyst, or perform them much faster, more specific, or at lower temperatures. This can be observed on a Boltzmann distribution and energy profile diagram. This means that catalysts reduce the amount of energy needed to start a chemical reaction.
Q:What is a catalyst?
The catalyst plays a role in a variety of ways that are likely to temporarily alter the chemical changes associated with the reactants themselves, and may also only help to adsorb the physical changes in the reactants, but the reaction eventually becomes its own form The
Q:What is the analytical principle of chemical adsorbents?
What do you mean by the chemical adsorber? BET is the use of the surface of the uneven force field, but the inert gas at low temperature in the surface adsorption. TPD, TPR is the number of active centers that can be measured by the technique of desorption and reduction between specific gases and catalysts as the temperature increases. If the active site is a reduced position, H2-TPR can be used. If the active site is acidic, NH3-TPD can be used, but also the method of alkali titration.

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