Page 252 - Handbook of Plastics Technologies

ELASTOMERS

4.44 CHAPTER 4

SCHEME 14

TABLE 4.7 Recipes for Vulcanization by Phenolic Curatives, Quinone Derivatives, or
Maleimides *
IIR SBR

1 2 1 2 NBR
Zinc oxide 5.00 5.00 – – –
Lead peroxide (Pb O ) – 10.00 – – –
3 4
Stearic acid 1.00 – – – –
Phenolic curative 12.00 – – – –
†
(SP-1056)
Benzoquinonedioxime (GMF) – 2.00 – – –
m-Phenylenebismaleamide (HVA-2) ‡ – – 0.85 0.85 3.00
2-Benzothiazyl disulfide (MBTS) – – 2.00 – –
Dicumyl peroxide – – – 0.30 0.30
**
Vulcanization condition
Temperature, °C 180 153 153 153 153
Time, min 30 20 25 25 30
*.Concentrations in phr.
†.Schenectady Chemicals.
‡.Du Pont.
**.Conditions change depending on other aspects of the compositions.

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