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Calcium aluminate composition and process for making same

  • US 5,269,845 A
  • Filed: 02/27/1992
  • Issued: 12/14/1993
  • Est. Priority Date: 02/27/1992
  • Status: Expired due to Fees
First Claim
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1. A cementitious composition particularly useful in the construction of molds, said composition comprising:

  • (a) 30-40 percent by weight of a calcium aluminate powder base;

    (b) 30-40 percent by weight of at least one particulate inorganic filler;

    (c) 25-35 percent by weight of a latex binding agent chemically compatible with said calcium aluminate powder;

    (d) 0.0005-0.005 percent by weight of at least one dispersing agent;

    (e) 0.0005-0.005 percent by weight of an initiator which initiates the binding of said calcium aluminate powder to said inorganic filler at pH values between 6.5 and 8.0;

    (f) 0.05-0.5 percent by weight of at least one surface hardness agent comprising an alkyl-aryl sulfonate compound or salt thereof or an aryl sulfonate compound or salt thereof;

    (g) 0.05-0.5 percent by weight of a polymer salt surface gloss agent; and

    (h) 1.14 2 percent by weight of at least one metal or non-metal oxide wetting agent.

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