ZnO rubber grade supplier and manufacturer - China factory

Product Description

ZnO rubber grade

All we do is always involved with our tenet " Consumer initial, Trust first, devoting within the food stuff packaging and environmental defense for Hot sale Factory China ZnO rubber grade, We adhere on the tenet of "Services of Standardization, to meet Customers' Demands".
Hot sale Factory China ZnO rubber grade, We now have a dedicated and aggressive sales team, and many branches, catering to our customers. We've been looking for long-term business partnerships, and ensure our suppliers that they will surely benefit in both short and long run.

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.