Rubber compositions and methods for improving scorch safety and hysteretic properties of the compositions
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United States of America Patent
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Issued Date -
Jan 22, 2004
app pub date -
Jul 11, 2002
filing date -
Jul 11, 2002
priority date (Note) -
Abandoned
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Abstract
A rubber composition comprising (a) a rubber component; (b) silica as a reinforcing filler; (c) a reinforcing additive comprising a mixture and/or the product of in situ reaction of (i) at least one functionalized mercaptosilane compound containing, per molecule, at least one functional group capable of bonding chemically and/or physically with the surface hydroxyl sites of the silica filler and at least one other functional group capable of bonding chemically and/or physically to the chains of the rubber component and (ii) at least one functionalized organosilane compound, other than a mercaptosilane compound, containing, per molecule, at least one functional group capable of bonding chemically and/or physically with the mercaptosilane compound and/or the hydroxyl sites of the silica filler and at least one other functional group capable of bonding chemically and/or physically to the chains of the rubber component; and (d) an effective amount of a thiuram disulfide accelerator having a molecular weight of at least about 400 is provided.
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