Zinc Oxide for Rubber Industry Grade

Chemical Reagent: Zinc Oxide (ZnO)
Huiyuan brand zinc oxide has high purity, with a content of 99.7% and good vulcanization activity. During the vulcanization process, it can react more purely and efficiently with stearic acid to form zinc stearate, thereby activating the vulcanizing agent.Secondly, superior physical properties are ensured. Due to its small particle size and narrow distribution, it can disperse more evenly in the rubber matrix.Thirdly, the heavy metal content (such as lead and cadmium) complies with increasingly stringent environmental regulations (such as REACH and ROHS).

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Product Description

Charactristics		Limited			Measured values
Charactristics		I	Ⅱ	Ⅲ	Measured values
Zinc oxide content (in terms of dry products)w/% ≥		99.75	99.65	99.50	99.7
Metal content (in Znw/% ≤		——	——	——	——
(Pb)w/% ≤		0.01	0.02	0.05	0.01
(Mn)w/% ≤		——	0.0001	0.0001	0.0001
(Cu)w/% ≤		0.0002	0.0002	0.0002	0.0001
Hydrochloric acid is insolublew/% ≤		0.005	0.005	0.005	0.002
Burn loss w/% ≤		0.2	0.2	0.2	0.08
Water soluble w/% ≤		0.1	0.1	0.1	0.02
Sieve residue (45μm test sieve) w/% ≤		0.05	0.05	0.05	0.01
105°C volatilesw/% ≤		0.2	0.2	0.2	0.05
Chloride (in Cl)w/% ≤		0.005	0.005	0.005	0.002
(Cd)w/% ≤		0.001	0.0015	0.003	0.001
(Ni)w/% ≤		0.01	——	0.01	0.005
Silicon (in terms of SiO₂)w/% ≤		0.01	0.01	0.01	0.005
(B)w/% ≤		0.01	0.01	0.01	0.005
Expression density	Loosedensity(g/ml)	0.4-0.5			0.42
Expression density	Tightness(g/ml)	0.8-1.0			0.83