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Construction material with calcium silicate monohydrate produced thereon in situ and composition therefor

  • US 4,015,040 A
  • Filed: 07/01/1976
  • Issued: 03/29/1977
  • Est. Priority Date: 07/04/1973
  • Status: Expired due to Term
First Claim
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1. A construction material covered with a film composition on a construction object containing calcium silicate monohydrate, 2CaO.SiO2.H2 O, produced in situ by reacting a coating with a calcium compound in the presence of water, said calcium compound selected from the group consisting of calcium hydroxide, calcium halide, calcium nitrate, calcium nitrite, calcium carbonate, calcium oxide, calcium sulfate, calcium silicate, calcium phosphate, and calcium salts of organic acids, said coating being formed from a coating material which comprises a silica sol dispersed in a medium selected from the group consisting of water, methanol, ethanol isopropanol and a mixture thereof, at least one kind of aggregate, at least one kind of viscosity increasing agent selected from the group consisting of polyacrylic acid and sodium polyacrylate, at least one kind of organic polymer, as an aqueous emulsion, selected from the group consisting of polyvinylacetate and polyacrylate, and pigment, said silica sol containing 5 to 50% by weight of SiO2 and having a mol ratio SiO2 /Me2 O, wherein Me represents monovalent alkali metal atom, of more than 25.

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