RUBBER VULCANIZING ACCELERATOR DCBS (DZ)

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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 DCBS (DZ) 

Chemical Name : N ,N-Dicyclohexyl-2-Benzothiazole sulfonamide
Molecular Formula: C19H26N2S2
Molecular Weight: 346.56
CAS NO. : 4979-32-2
Executive standardQB/DZ01-2008
 Specification:

Item

Index

Acceptable end-product

Appearance(Visual inspection) 

Light  yellow to light brown powder 

Initial M. P, oC                   ≥ 

98.0

Loss on drying,%                 ≥ 

0.50 

Ash,%                                ≤ 

0.50

Properties: Light yellow to light brown powder, the relative density of 1.2, soluble in benzene, dichloromethane, carbon tetrachloride, insoluble in gasoline, acetone, ethyl acetate and ethanol, insoluble in water. 

Application: DCBS is a sulfenamide accelerator with excellent anti-scorching property and delayed onset of cure. It is compatible with natural and synthetic rubbers, suitable for radial ply tyre, rubber belts and shock absorber, etc. Particularly it produces good adhesion to metal.

Packaging: 25kg plastic woven bag, paper with plastic film bag, 25kg drum.

Storage: The 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 1 year.

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

 


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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:The role of catalyst in chemical reactions
The role of the catalyst is to change the reaction required to achieve the activation energy, can reduce the activation energy is called positive catalyst (that is, usually the meaning of the catalyst), to improve the activation energy is negative catalyst
Q:Explanation of Catalysts?
A catalyst is a compound in chemistry (it can be an acid or temperature or a base or a metal or anything, pressure anything) that shifts the reaction towards one product or the other... In simple words. If you want to obtain something, e.g. water, then you can obtain it in different timings, ie in 2000 years, but if you want to obtain it in 2 hours instead of 2000 years then you add a catalyst, e.g. you heat the reaction to speed it up, you add an acid, or a base etc. Some catalysts also act on the regioselectivity of a compound thru preferring the formation of a stereo-isomer to another. E.g. if you want to obtain S-Thalidomide instead of R-Thalidomide you use a particular catalyst etc...
Q:why are enzymes called catalysts?
Because they speed up chemical reactions by lower the amount of energy required to start the reaction (called activation energy). A catalyst is something that speeds up a reaction - which is what enymes do.
Q:Palladium is the main catalyst in chemistry?
Palladium in the chemical mainly to do the catalyst; palladium and ruthenium, iridium, silver, gold, copper and other alloy, can improve the palladium resistivity, hardness and strength, used in the manufacture of precision resistors, jewelry and so on. While the most common and most commercially available palladium jewelery is palladium.
Q:Hydrogen and nitrogen in the high temperature and pressure and catalyst conditions for the synthesi
3H2 + N2 catalyst iron ---> 2NH3 conditions high temperature and high pressure
Q:Catalyst and Intermediate.?
Cl is the catalyst. ClO the intermediate. The catalyst is the component which does not change in overall reaction. He forms some intermediate component(s) with the reactants. In the later reaction steps the intermediate(s) react forming the catalyst in its original state. (a) The overall order is the sum of the orders with respect to the components: n = 1 +1 = 2 (b) the unit of the rate of reaction is r [=] mol/ (Ls) (more general mol per unit time and volume) compare dimensions mol / (Ls) [=] k · mo/L · mol/L =k [=] L/(s mol) (more general unit volume per unit time and mole) (c) First reaction For elementary reaction steps the order of the reaction rate with respect to a reactant is equal to stoichiometric coefficient. Hence the rate of first reaction is: r₁ = k₁·[Cl]·[O₃] Overall rate is given by the rate determining step, while other reaction steps are in equilibrium: r = r₁ = k₁·[Cl]·[O₃] If second reaction is the rate determine step r₂ = k₂·[O]·[ClO] while reaction 1 is at equilibrium K₁ = ( [ClO]·[O₂] ) / ( [Cl]·[O₃] ) =[ClO] = K₁·( [Cl]·[O₃] ) / [O₂] the overall rate would be: r = r₂ = k₂·[O]·[ClO] = K₁·k₂·[O]·[Cl]·[O₃] / [O₂] = k·[O]·[Cl]·[O₃] / [O₂] That doesn't match the observed rate law
Q:Does a catalyst have an effect on the Gibbs free energy of a reaction?
A catalyst can change the activation energy not the Gibbs energy. The Gibbs energy is the energy difference between the initial state and final state. A catalyst cannot change that. Imagine you are driving from school to home. How you drive do not change the height difference between the school and your home. However, a catalyst can change your path which can change the routine you drive from school to home. So if there is a hill in between your school and you home, you have the choice to drive through it or drive around. Here is a picture: upload.wikimedia.org/wikipedia/co... A catalyst can change the height of the barrier, but cannot alter the initial or final state.
Q:What are the chemical reaction conditions in organic chemistry are catalyst and heating, please elaborate
This really does not have omnipotent law, their own more than one point, you can classify to remember, when I was in high school is in accordance with the notes, such as poly, polycondensation and the like. In general, the double triple bond addition, plus halogen is not the conditions, plus HCl, HBr and the like to heat; dehydration reaction generally concentrated H2SO4 heating, dehydration condensation is also; there are some special, such as ethylene added to ethanol Special temperature requirements, it seems that 120 degrees, there are other; other addition poly, polycondensation some need catalyst. The The In short, the conditions are many, in general, you do not go to the high school to do more questions after the feeling, encounter problems do not panic general experience can come out according to experience, this also depends on the usual accumulation, if the equation conditions Wrong to deduct points, it is not worthwhile. There are some questions when the examination will give you some information, whether you know do not know should see clearly, although some of the reaction but the subject to the conditions are not the same, when you do according to the title to write conditions, this will not wrong. In addition, thank you for your help, I do not seem to know you
Q:Chemical questions: "CO2 and H2 in the catalyst conditions have a reaction
CO2 + H2 = CO + H2O (conditions: catalyst, generally requires heating, and reversible)

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