Scorch retardants for rubber reinforced with siliceous pigment and mercapto-type coupling agent
Rubber vulcanizates reinforced with siliceous pigment have desirable properties. The addition of a mercapto-type coupling agent hastens curing and strengthens adhesion between the rubber polymer and the silica, but tends to cause premature vulcanization or scorch. The further addition of a thiomorph...
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| Zusammenfassung: | Rubber vulcanizates reinforced with siliceous pigment have desirable properties. The addition of a mercapto-type coupling agent hastens curing and strengthens adhesion between the rubber polymer and the silica, but tends to cause premature vulcanization or scorch. The further addition of a thiomorpholine compound such as 4,4'-dithiodimorpholine or 2-(4-morpholinothio)-benzothiazole retards scorch and improves stress/strain properties and abrasion resistance, but affects curing time only moderately. |
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