Rubber Chemcials Rubber Antioxidant NBC Model

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25 m.t.
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12000 m.t./month

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Product Description:

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 0.30.5%. 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.

 

 

 

 

 

 


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Q:what is the role of a catalyst in a chemical reaction?
A catalyst speeds up a chemical reaction by providing an alternate reaction pathway with a lower activation energy. Since the activation energy is lower, more product will be formed in the same amount of time.
Q:TEN POINTS!! How is the catalyst affected by vinegar?
It denatures the catalyst because the rise in pH or amount of H3O+ ions. Temperature will also denature the catalyst if it's out of its optimum range.
Q:what is a catalyst ?
anything that speeds up a reaction, chemical or otherwise, between two things
Q:What is the standard for the storage of flammable and explosive chemicals now?
First, the basic requirements of classification of storage Dangerous goods, variety, complex performance, storage, in accordance with the zoning, classification, sub-section of the principle of special storage, set the number, set the number of fixed warehouses, fixed staff (four) custody. Small warehouses should be classified, divided, sub-stack storage, the performance of each other, fire fighting different items, dangerous dangerous goods and other general dangerous goods, should be stored separately.
Q:Comparison of biocatalysts with chemical catalysts!
biocatalyst activity is adjustable, can be subject to hormones and other active regulation of hormones.
Q:Question about catalysts?
Generally, catalysts participate and facilitate a reaction, but the catalyst is returned unchanged. For example, sulfuric acid may be used in a Fischer esterification, palladium in a Heck reaction, pyridine in an acylation reaction, hydroxide in an aldol condensation, cyanide in a benzoin condensation, etc. An enzyme can facilitate a reaction is a similar manner, by being an acid or base catalyst for example. We could say that generally, reactions are reversible. Practically, that is not true as the energy differences of the reactants and products may be so different to prevent the reverse, an explosion for example. If a reaction is reversible, that may not mean the reverse reaction will take place. Le Chatelier's Principle can apply to determine the products.
Q:catalyst..........?
Short=yes they are. Long version Traditionally, acids were defined to be compounds that produce H+ ions when dissoved in water (Arrhenius theory). But this definition is limited to acids that can be dissolved in water. Brønsted-Lowry then formed a definition which states that acids are compounds which donates a protons or H+ ions. If u think about it, a H+ ion is practically a proton. a proton with no electron outer shell is far too reactive to stay in its current state. thus it will form a bond with H2O to form H3O+ Because of this, acid catalysts are supose to be H3O+ instead of H+. But since it is more convinient to use H+, the form of writing H+ remained instead....... and yes...... the scientists were lazy......
Q:describe a biological catalyst?
Biological catalysts work in similar fashion to inorganic catalysts. The lower the activation energy (Delt. G) of the rate limiting step in an SN1 or SN2 reaction. However, they are comprised of biomolecules susceptible to degradation and are quite sensitive to temperature change.
Q:Is it not the rate to accelerate the addition of the catalyst to the catalyst, and that is why the balance does not move
In the chemical equilibrium, after adding the catalyst, the positive and negative reaction rate increases equally, but the positive reaction rate is still equal to the reverse reaction rate, so the balance does not move
Q:Why are there so many catalysts?
Many important chemical reactions require inputs of energy to proceed. If a catalyst is present less energy will be required to complete the reaction. Catalysts are substances that are mixed in with materials that are to be reacted, but they themselves do not, in the end, change chemically. They establish a local environment that promotes one or more chemical reactions to take place. A catalyst is important in many industrial processes. Sulfuric acid, which is used to produce batteries, detergents, dyes, explosives, plastics, and many other produces, is commonly produced using a catalyst called vanadium oxide. Ammonia, a primary component of many fertilizers, could not be produced economically without the use of iron oxide which speed up the reaction. The process of catalyst also affects the state of our global environment. Automobiles use catalytic converters to treat exhaust. The metals platinum and palladium facilitate the chemical conversion of noxious gases to more inert forms, greatly decreasing the environmental impact of combustion engines. Probably the most important impact of catalyst is on life itself. All important biochemical reactions are catalyzed by molecules called enzymes. Most enzymes are proteins which catalyze specific reactions within cells. Some examples include polymerases, which synthesize DNS and RNA, peptidases, which digest protein, and ATP synthases, which produce energy for the many different cell activities.

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