Rubber Chemcials Rubber Antioxidant NDBC (NBC)
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 12000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
You Might Also Like
NDBC (NBC)
Chemical Name:Nickel Dibutyl Dithiocarbamate
Molecular Formula:C 18 H36 N 2 S 4 Ni
Molecular Weight:467
CAS No.:13927-77-0
Specifications:
Item
| Specifications
|
Appearance
| Dark-green Power (Granules)
|
Initial Melting Point, °C Min.
| 83
|
Heat Loss , % Max.
| 0.5 |
Nickel content , %
| 12.0 - 13.0
|
Residue on 150 µm Sieve , % Max.
| 0.10 |
Residue on 63 µm Sieve , % Max.
| 0.50 |
Properties: Dark-green Power. Density is 1.26g/ cm3 . flashing point is 260°C. Soluble in chloroform, benzene and carbon bisulfide , a little soluble in acetone, insoluble in water.
Applications: Mainly use in styrene- butadience rubber, chloroprene rubber and chlorosul-fonated polyethylene rubber. Avoiding the rubber crack for the sunshine and ozone, promoting the heat-resistant of chloroprene rubber and chlorosul-fonated polyethylene rubber. In plastic industry, it can be used as stabilitant and ozone-resistant agent for high polymer materials. It has advantage of stability for polypropylene fibre , thin film and narrow belt, but it will make the products appear yellow-green color. The use level is 0.3～0.5%. NDBC is regulated for use in articles in contact with food as specified.
Packing:Coextruded paper bags lined with polyethylene film bags. Net weight 25 kg per bag.
Storage:Store closed containers in a cool, dry, well-ventilated area. Avoid exposure to direct sunlight.
- Q: Are biological enzymes harmful to humans?
- Recently, people are increasingly interested in the use of enzymes in cosmetics, not only from a technical point of view, but also from the market prospects and consumer awareness of these seemingly effective raw materials. Enzymes have been used in laundry detergent for more than 20 years and are linked to long-term performance with the ability to provide and enhance strong stain removal capabilities. According to some speculation, their positive response in the market may be interpreted as satisfying the aging population, the pursuit of younger needs to enhance the performance of cosmetics. The natural shedding process of the skin is controlled by the enzymatic reaction, and the specific enzyme dissolves the cell desmosomes that release the dead epidermal cells. These enzymes are produced in dead keratinocytes. Their active sites are phagocytosed with mercapto groups, and cleavage of peptide bonds in a manner similar to that of thio-glycolic acid and mercaptoalanine (plus derivatives) when the hair is broken. Use these types of enzymes and it
- Q: Will the catalyst change the reaction rate in the chemical reaction?
- Many of the catalysts are specific in varying degrees, and when added to the chemical reaction system that it can catalyze, it must change the rate of chemical reaction, and of course both positively and negatively catalyzed. Chemical reaction rate, it can not be called a catalyst.
- Q: Briefly define a homogenous catalyst? Help please!?
- Define Homogenous
- Q: The concept of catalyst in high school chemistry
- The "chemical properties" and "quality" did not change before and after the reaction, indicating that the chemical properties and quality of the catalyst before and after the chemical reaction must remain unchanged, but the physical properties may change. Therefore, it can not be said that the nature of the catalyst itself did not change before and after the reaction.
- Q: How does catalyst aid a chemical reaction?
- A catalyst will lower the activation energy of a reaction, and hence allow it to happen faster. The actual mechanisms vary widely. Two mechanisms are: 1/ formation of intermediate compounds, which can then decompose into the catalyst and the required product 2/ provision of a large surface area for adsorption, so the reactant molecules can come into contact sooner.
- Q: What is the difference between an enzyme catalyst in a living body and a catalyst in chemistry?
- (Such as: high temperature, high pressure, strong acid, alkali, etc.), but the enzyme catalyzed reaction (enzymatic reaction) is generally at room temperature, atmospheric pressure (normal reaction), the reaction temperature of the chemical reaction, , Neutral pH, etc. under mild reaction conditions.
- Q: Is it possible for the different chemical reactions to have the same catalyst?
- Right, think about the catalysis of biological enzymes
- Q: The beginning of the chemistry plus the catalyst and the plot without the Cuihua agent
- Plus the rate of fast
- Q: chemistry subject
- A catalyst is a substance which alters the rate of a chemical reaction but is chemically unchanged at the end of the reaction there are well some of em are 2,2'-Bis(2-indenyl) biphenyl Adams' catalyst Band 3 Cerium(IV) oxide Copper(II) acetate Copper(II) hydroxide Cyclooctadiene rhodium chloride dimer 4-Dimethylaminopyridine Enzyme engineering Faujasite Frustrated Lewis pair Grubbs' catalyst Hopcalite Incipient Wetness Impregnation Lanthanide triflates Lindlar catalyst Mesoporous silicates Methylaluminoxane NOBIN Nickel(III) oxide Noxer block Palladium on carbon Phase transfer catalyst Platinum Polyoxometalate P cont. Post-metallocene catalyst 2-Pyridone Pyrotol catalyst Raney nickel Ribozyme Tetrakis(triphenylphosphine)palladium(... Tetrakis(triphenylphosphine)platinum(0... Triazabicyclodecene Tris(dibenzylideneacetone)dipalladium(... Trost ligand Vanadium(V) oxide Wilkinson's catalyst Ziegler-Natta catalyst
- Q: Can you describe at least 4 ways a catalyst can lower the activation energy of a reaction?
- To see how a catalyst accelerates the reaction, we need to look at the potential energy diagram shown below which compares the non-catalytic and the catalytic reaction. For the non-catalytic reaction, the figure is simply the familiar way to visualize the Arrhenius equation: the reaction proceeds when A and B collide with succificient energy to overcome the activation barrier. The change in Gibbs free energy between reactants, A + B, and the product P is delta G. The catalytic reaction starts by bonding of the reactants A and B to the catalyst, in a spontaneous reaction. Hence, the formation of this complex is exothermic and the free energy is lowered. There then follows the reaction between A and B while they are bound to the catalyst. This step is associated with an activation energy; however, it is significantly lower than that for the uncatalyzed reaction. Finally, the product P seperates from the catalyst in an endothermic step. The energy diagram illustrates 4 ways the catalyst works : The catalyst offers an alternative path for the reaction that is energetically more favorable The activation energy of the catalytic reaction is significantly smaller than that of the uncatalyzed reaction; hence the rate of the catalytic reaction is much larger The overall change in free energy for the catalytic reaction equals that of the uncatalyzed reaction. Hence, the catalyst does not affect the equilibrium constant for the overall reaction. A catalyst cannot change the thermodynamics of a reaction but it can change the kinetics. The catalyst accelerates both the forward and the reverse reaction to the same extent. In other words, if a catalyst accelerates the formation of product P from A and B, it will do the same for the decomposition of P into A and B.
Send your message to us
Rubber Chemcials Rubber Antioxidant NDBC (NBC)
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 12000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
Similar products
Hot products
Hot Searches
Related keywords
