Rubber Compounding Materials
Vulcanization Materials

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Composition ò


Function & Compounding

Zinc salts of lauric and related fatty acids
ï 1.18; tan flaked solid; mp about 107-118°C, but not definitely specified; good storage stability.

For CR, NBR, NR, SBR and their latices; recommended for tire carcass and tread compounds, extruded stocks, proof goods; activates thiazole accelerators and their derivatives; evens out and advances curing rates of off-grade rubbers deficient in natural fatty acids. Low blooming from cured and uncured compounds; much less blooming than many other fatty acid softeners; non-discoloring; melts, disperses readily.

Zinc Stearate Line
Zinc stearate
Harwick Standard

White powder or prill; Melt pt. 120C;available in high bulk or densified grades including USP and wettable

Mutiple functions in elastomeric compounds including lubricant,acid scavenger, viscosity modifier or cure activator.

CR 4
Western Reserve Chemical

White powder; 99.9% passes 325 mesh; 5.6; surface area 5 m2/g; 99.9% ZnO min.

Activator for NR, SR, reinforcer and pigment.

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Harwick Standard

Western Reserve Chemical


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