Ppg Industries, Inc.

John E Blasko

Jerome A Seiner

William G Boberski

This invention relates to pigmented curable silicate compositions having better pigment dispersions as evidenced by improved color uniformity, hiding power, lower viscosity and consistency. The aqueous compositions contain water-soluble or -dispersible silicate glass, pigment and a base having a basicity greater than that of the silicate glass. Preferred compositions also contain a water-soluble latent insolubilizing agent.

Curable pigmented silicate compositions

This invention relates to pigmentary hardener-containing curable silicate compositions having improved water resistance, wherein the pigmentary hardener has the formula M.sub.x M.sub.y 'O.sub.z where M is a divalent or trivalent metal ion, M' is an ion of a metal from Groups III, IV or VIB of the Periodic Table of Elements, provided M and M' are not the same metal ion, x is 1 or 2, y is 1, 2 or 3 and z is an integer the value of which satisfies the oxidation state of the pigmentary hardener.

Pigmentary hardener-containing curable silicate compositions

Curable one-package compositions which form products having excellent water resistance as well as other desirable properties are prepared by forming aqueous solutions of water-soluble silicates and water-soluble borate latent insolubilizers selected from the group consisting of alkali metal or quaternary ammonium borates, having dispersed therein certain inorganic pigments, preferably TiO.sub.2. These curable compositions may be employed in a number of applications such as, for example, coatings, castings and moldings, but they are particularly useful in protective and decorative applications.

Curable compositions comprising aqueous solutions of water-soluble

Curable one-package compositions which form products having excellent water resistance as well as other desirable properties are prepared by forming aqueous solutions of water-soluble silicates and water-soluble zincate latent insolubilizers selected from the group consisting of alkali metal or quaternary ammonium zincates having dispersed therein certain inorganic pigments, preferably TiO.sub.2. These curable compositions may be employed in a number of applications such as, for example, coatings, castings and moldings, but they are particularly useful in protective and decorative applications.

Curable compositions which form cured products having excellent durability, stain resistance, resistance to heat and flame, and water resistance as well as other desirable properties are prepared by forming aqueous solutions of water-soluble silicates and water-soluble latent insolubilizing agents formed from a metal ion selected from the group consisting of Al.sup.+++, Fe.sup.+++, Cr.sup.+++ and Sn.sup.++ and a ligand selected from the group consisting of ethylenediaminetetraacetate, diethylenetriaminepentaacetate, N-(hydroxyethyl)ethylenediaminetriacetate, nitrilotriacetate and 1,3-propanediaminetetraacetate. The compositions have excellent stability and may be employed in various applications such as coatings, castings, and molding applications. The compositions are particularly useful in coating applications.

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Gibsonia, PA, United States of America

John E Blasko