zinc peroxide


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zinc pe·rox·ide

ZnO2; a yellowish white powder, insoluble in water and decomposed by acids; used in pharmaceutic preparations.
Synonym(s): zinc superoxide
Farlex Partner Medical Dictionary © Farlex 2012
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Table 5: Polishing rage and final leached-layer thickness of the coatings based on intermediate-polishing binder composition Polishing rate Number of measurements ([mu]/month) during polishing #2Mg 46 [+ or -] 4 2 #2Ca 112 [+ or -] 4 2 #2Sr 39 [+ or -] 3 3 #4Ca 28 [+ or -] 4 4 #2reference 45 [+ or -] 6 4 The uncertainties indicate the 95% confidence level of the values The coatings formulated with slow-polishing binders, and those containing zinc peroxide, did not polish at all during the 50 days the experiment ran.
However, this tendency is most pronounced for zinc peroxide. The reference included in the figure contains small zinc-oxide particles and larger cuprous-oxide particles, as well as some iron oxide.
Whereas magnesium, calcium, and strontium peroxide ultimately give alkaline by-products (group II metals), zinc peroxide is the only pigment investigated in this paper that gives amphoteric by-products when reacting with water.
The group contains the three experimental coatings; intermediate-polishing zinc peroxide, intermediate-polishing high-PVC zinc peroxide, and slow-polishing calcium peroxide.
Higher levels of zinc peroxide provided slightly higher hardness values.
Higher stiffness values are possible with 7 phr of zinc peroxide addition.
Lower levels of zinc peroxide were advantageous in reducing set.
Increased zinc peroxide level provided a moderate reduction in elongation loss as well.
In the case of the EV vulcanizates, however, an increase was given by the substitution of zinc peroxide for zinc oxide.
With both EV systems, 1 and 2, however, a marked improvement was obtained when zinc peroxide was substituted for zinc oxide.
The difference is substantially eliminated and the TR values are shifted towards lower temperatures if zinc peroxide is substituted for zinc oxide.
The EV 1 and EV 2 systems modified with zinc peroxide are intermediate in this respect.