ZnO rubber grade
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  • Air ProZnO rubber grade

ZnO rubber grade

MST ZnO rubber grade is a white or slightly yellow fine powder, which is easily dispersed in rubber and latex. It is a reinforcing agent, active agent and vulcanizing agent for natural rubber and synthetic rubber.

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Product Description

ZnO rubber grade

MST ZnO rubber grade is a white or slightly yellow fine powder, which is easily dispersed in rubber and latex. It is a reinforcing agent, active agent and vulcanizing agent for natural rubber and synthetic rubber.


Product name

Zinc oxide 

Molecular formula

ZnO

CAS NO

1314-13-2

EINECS NO

215-222-5

Density

5.606g/cm3

Molecular weight

81.38

Melting point

1975℃

Boiling Point:

2360ºC

Purity

0.99

Active substance content

0.997

H.S CODE

2817001000

Appearance

White powder or crystal


The role of ZnO rubber grade in the rubber compound:

1. ZnO rubber grade acts as an activator or accelerator in the formulation,

2. ZnO rubber grade can be used as an acid absorbent. When the rubber is vulcanized, it can absorb certain natural substances produced by the vulcanization reaction, such as HCl and so on.

3. ZnO rubber grade can improve the thermal performance of the rubber compound.

4. ZnO rubber grade can activate the entire vulcanization system,Zinc oxide and stearic acid together form zinc soap, improve the solubility of zinc oxide in the rubber compound, and form a complex with the accelerator, which is particularly active , It reacts with sulfur to form a strong vulcanizing agent.

5. ZnO rubber grade can increase the crosslink density. Zinc oxide reacts with stearic acid to form Zn2++ salt, which chelates with the pendant group of the sulfur-containing rubber accelerator to stabilize the weak bond and change the cleavage position of the sulfur bond. Vulcanize rubber to generate shorter cross-links, increase new cross-links, and increase cross-link density.

6. ZnO rubber grade can improve the aging resistance of the vulcanized rubber. During vulcanization and use, the polysulfide bond breaks, and the generated H2S will accelerate the cracking of the rubber. Zinc oxide will react with it to form new cross-linked bonds, stabilize the vulcanized network, and improve the resistance Aging performance.

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

Specific surface area(m2/g)

agree

Oil absorption */g/100g

agree

Color* (compared with standard sample)

agree

Decoloration power*(compared with standard sample)≥

agree


Milestone Industrial co. ltd., as an enterprise specializing in the production of zinc oxide for 30 years, is moving towards a new direction, namely, production-based, industry-based, global procurement, global sales, domestic and foreign trade integration, upstream and downstream integration, A global enterprise with comprehensive value-added capabilities and compound competitiveness is moving forward steadily.


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