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Silicone foam and method for making it

  • US 4,859,712 A
  • Filed: 10/12/1988
  • Issued: 08/22/1989
  • Est. Priority Date: 10/12/1988
  • Status: Expired due to Term
First Claim
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1. The method of preparing a silicone foam comprising embedding in a layer of uncured silicone a layer of crystalline material, the crystalline material being closely packed and generally in crystal-to-crystal contact, and embraced by the liquid silicone, curing the silicone, and with a solvent which dissolves the crystals but does not dissolve the cured silicone dissolving out the crystals, the crystals being provided in a plurality of sizes or ranges of sizes to increase the packing ratio of the crystals as a group whereby to produce a structure of said cured silicone having a great number of tendrils and intercommunicating cavities.

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