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Rubber Chemical

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Zinc Oxide Powder Data:

Product name:	Zinc Oxide
CAS NO.	1314-13-2
EINECS NO.	215-222-5
Molecular formula:	ZnO
Density:	5.606g/cm3
Molecular weight:	81.38
Appearance:	White hexagonal crystal or powder

Rubber Chemical factory

Rubber grade zinc oxide is rubber chemical.

Rubber grade zinc oxide is a kind of rubber chemicals, and rubber grade zinc oxide is used as an active agent in rubber. Sometimes used as a reinforcing agent and coloring agent.

Standard:《GB/T3185-2016》

Item	Type1	Type2	Type3
Zinc oxide（Zn0 calculating as dry materia)% ≥	99.7	99.7	99.5
Metal content（as Zn)% ≤	none	none	0.008
Insoluble Matter in Hci % ≤	0.006	0.008	0.03
Loss on ignition % ≤	0.2	0.2	0.25
Residue on sieve (45um)% ≤	0.1	0.15	0.2
Water soluble matter % ≤	0.1	0.1	0.15
Volatile matter in 105℃ % ≤	0.3	0.4	0.5
Lead(pb）% ≤	0.008	0.05	0.1
Copper(Cu)% ≤	0.0002	0.0004	0.0007
Manganese（ Mn）%	0.0001	0.0001	0.0003
Cadmium (Cd）%	0.002	0.005	0.01
Iron (Fe）%	0.005	0.01	—

According to its different production process, zinc oxide can be divided into indirect zinc oxide ,because it originated in France, it is also called French process zinc oxide, and direct zinc oxide is also called American process zinc oxide and active zinc oxide.

As a rubber chemical , Rubber grade zinc oxide is the most important inorganic active agent in the rubber industry. The addition of rubber grade zinc oxide can not only speed up the vulcanization rate, but also increase the degree of crosslinking. It has an activating effect on thiazoles, sulfenamides, guanidines and thiuram accelerators.

Because it is a rubber chemical, rubber grade zinc oxide is widely used in many rubber products, especially transparent rubber products and products that come in contact with food. 50% of industrially produced zinc oxide flows to the rubber industry as a rubber chemicals.

Zinc oxide and stearic acid are important reactants for rubber vulcanization and are one of the raw materials for rubber manufacturing.

The mixture of rubber grade zinc oxide and stearic acid strengthens the hardness of the rubber. As a rubber chemical, zinc oxide is also an important additive for automobile tires.

In addition to vulcanization, zinc oxide can greatly improve the thermal conductivity of rubber, thereby helping tires to dissipate heat and ensuring driving safety. Zinc oxide additives also prevent the erosion of rubber by mold organisms or ultraviolet rays.

About 50% of the zinc oxide produced by MST is used as rubber chemical raw materials to supply major tire manufacturers. The major well-known brands currently cooperated with are as follows