Water-based paint including glass particulate
First Claim
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1. A water-based paint composition, which has excellent adhesion to glass, comprising:
- (i) water-soluble sodium silicate forming 20 to 45 weight percent of said composition,(ii) water forming 5 to 25 weight percent of said composition;
(iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5;
(iv) finely divided metal oxide powder selected from the group consisting of oxides of copper, iron, nickel, cobalt and mixtures thereof forming 20 to 45 weight percent of said composition and having a particle size, on average, less than 7 microns;
(v) particles of soda-lime-silica glass forming 10 to 55 weight percent of the composition and having a diameter, on average, less than 20 microns and having a melting point of at least about 1700°
F.; and
at least one material selected from the group consisting of;
(vi) low-melting glass frit powder melting below 1300°
F. forming up to 10 weight percent of said composition and having a particle size, on average, less than 10 microns; and
(vii) zinc oxide forming up to 10 weight percent of said composition.
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Abstract
The invention is directed to a water-based paint composition comprising sodium silicate, water, water-soluble base, metal oxide pigment, soda-lime-silica glass particles and at least one of a low-melting glass frit or zinc oxide. Preferably, it includes only the glass frit and it further preferably comprises surfactants and aluminum hydroxide.
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Citations
9 Claims
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1. A water-based paint composition, which has excellent adhesion to glass, comprising:
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(i) water-soluble sodium silicate forming 20 to 45 weight percent of said composition, (ii) water forming 5 to 25 weight percent of said composition; (iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5; (iv) finely divided metal oxide powder selected from the group consisting of oxides of copper, iron, nickel, cobalt and mixtures thereof forming 20 to 45 weight percent of said composition and having a particle size, on average, less than 7 microns; (v) particles of soda-lime-silica glass forming 10 to 55 weight percent of the composition and having a diameter, on average, less than 20 microns and having a melting point of at least about 1700°
F.; and
at least one material selected from the group consisting of;(vi) low-melting glass frit powder melting below 1300°
F. forming up to 10 weight percent of said composition and having a particle size, on average, less than 10 microns; and(vii) zinc oxide forming up to 10 weight percent of said composition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A water-based paint composition, which has excellent adhesion to glass, comprising:
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(i) water-soluble sodium silicate forming 25 to 36 weight percent of said composition, (ii) water forming 10 to 25 weight percent of said composition; (iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5; (iv) finely divided copper oxide powder forming 25 to 45 weight percent of said composition and having a particle size, on average, between 3 and 7 microns; (v) particles of soda-lime-silica glass forming 10 to 55 weight percent of the composition and having a diameter, on average, in the range of 3 to 10 microns and having a melting point of at least about 1700°
F. and being composed of, by weight percent, silicon dioxide 68-75;
aluminum oxide 0-5;
calcium oxide 5-15;
magnesium oxide 0-10;
sodium oxide 10-18; and
potassium oxide 0-5, wherein the calcium oxide+magnesium oxide is 6-15% and sodium oxide+potassium oxide is 10-20% by weight.;(vi) glass frit powder, having a melting point below 1300°
F., forming 3 to 8 weight percent of said composition and having a particle diameter, on average, between about 3 and 7 microns and wherein said glass frit is a metal silicate with said metal being selected from the group consisting of zinc, boron, bismuth, titanium zirconium, and aluminum and mixtures thereof; and(vi) surfactant forming 0.1 to 1.0 weight percent of said composition. - View Dependent Claims (9)
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Specification