RUBBER VULCANIZING ACCELERATOR TMTD (TT)

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

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Product Description:

RUBBER VULCANIZING ACCELERATOR TMTD(TT) 

 

Chemical Name : Tetramethyl thiuram disulfide
 Molecular Formula: C6H12N2S4
 Molecular Weight: 240.43
CAS NO. : 137-26-8
Executive standardHG/T 23342007 
Specification: 


Item 

Index

First-class products

Acceptable end-product

Appearance
(Visual inspection)


White, light gray powder or granular 

 Initial M.P, oC             ≥ 

142.0

140.0

Loss on drying, %          ≤ 

0.30

0.30

Ash, %                        ≤ 

0.30

0.30

Residues on 150μm sieve, %                           ≤ 

0.00

0.10

Properties: White, light gray powder or granular. The density is 1.29. Soluble in benzene, acetone, chloroform, CS2 partly soluble in alcohol, diethyl ether, CCI4 insoluble in water, gasoline and alkali with lower concentration. Meeting hot water becomes to dimethylamine  ammonium and CS2. Be sensitive to skin and pneogaster

Application: Can be used as a single accelerator, as a secondary accelerator or as a sulphur donor in most sulphur-cured elastomers. Scorchy and gives fast cure rates. Produces an excellent vulcanisation plateau with good heat aging and compression set resistance in sulphurless and EV cure systems Good color retention is obtained in non-black vulcanisation. A valuable secondary accelerator for EPDM. May be used as a retarder in the vulcanisation of polychloroprene rubber with ETU and also be used as bactericide and pesticide

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

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 2 years.

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

 

 


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Q:Is the chemical reaction rate constant related to the amount of catalyst used?
The decomposition of hydrogen peroxide, manganese dioxide in addition to the catalyst, but also in which it can be considered a carrier (from the surface of manganese dioxide to emit small bubbles, you should be able to see), so the amount of more than certainly can speed up the reaction.
Q:how does the AMOUNT of a catalyst affect reaction rate?
theoretically, the more catalyst there is, the faster the rate of reaction. this is because it is bringing more particles together quicker.
Q:how heterogeneous catalyst work?
The Reduction Catalyst The reduction catalyst is the first stage of the catalytic converter. It uses platinum and rhodium to help reduce the NOx emissions. When an NO or NO2 molecule contacts the catalyst, the catalyst rips the nitrogen atom out of the molecule and holds on to it, freeing the oxygen in the form of O2. The nitrogen atoms bond with other nitrogen atoms that are also stuck to the catalyst, forming N2. For example: 2NO =N2 + O2 or 2NO2 =N2 + 2O2 The Oxidization Catalyst The oxidation catalyst is the second stage of the catalytic converter. It reduces the unburned hydrocarbons and carbon monoxide by burning (oxidizing) them over a platinum and palladium catalyst. This catalyst aids the reaction of the CO and hydrocarbons with the remaining oxygen in the exhaust gas. For example: 2CO + O2 =2CO2
Q:What is a catalyst and what is it do?
by lowering the activation energy
Q:What is the nature of the catalyst before and after the chemical reaction?
Only catalyze, do not participate in the reaction! The
Q:CO and NO react under the action of a catalyst to generate chemical formulas for CO2 and N2.
N from +2 to 0 price 2e * 2
Q:how a catalyst can provide a new route in forming the product?
a catalyst does not provide a new route. a catalyst effects the rate of a reaction by lowering the activation energy required for the reaction - the number of successful collisions and reactions therefore increase and rate of reaction increases.
Q:Chemical reaction plus catalyst on the △ H no effect
Since the addition of the catalyst only accelerates the reaction process and does not have an effect on the reaction product and the reactants
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:The greater the chemical adsorption strength, the catalyst activity changes
If the adsorbent is a reactant, then the better the adsorption capacity of the better catalytic effect; but the catalyst surface of the product will generally have adsorption, if this effect has become very strong, then desorption The process will become difficult, the catalytic effect will decline; the other one, if the adsorption of other substances, such as the reaction may produce a reaction or the catalyst will poison the material, it is greatly detrimental to the catalytic effect. The effect is to be controlled in a suitable optimum range for superior, and preferably to be selectively adsorbed.

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