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Silica-rubber mixtures having improved hardness

  • US 20050277717A1
  • Filed: 07/08/2003
  • Published: 12/15/2005
  • Est. Priority Date: 07/09/2002
  • Status: Active Grant
First Claim
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1. A method for increasing the hardness of silica/rubber mixtures comprising blending with said mixture at least one silane and a hardness-increasing amount of at least one member selected from the group consisting of thixotropic fumed silica;

  • precipitated silica;

    an MQ resin wherein Q is SiO4/2, M is R1R2R3SiO1/2, and R1, R2, and R3 are the same or different functional or non-functional organic groups;

    carbon black;

    a thermoplastic resin; and

    a thermosetting resin.

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