Soluble salt-free contaminant-free pigmented mirror coatings
First Claim
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1. An article of manufacture comprising a glass substrate having a metal layer thereon, and a protective coating over said metal layer, said protective coating comprising the combination of:
- (a) an organic resin polymer selected from the group consisting of alkyd resins, acrylic resins, acrylic modified alkyd resins, polyurethane oils, vinyl halide polymers, vinyl halide copolymers, non-oil based urethane resin, and phenol-formaldehyde resins contained in aqueous or non-aqueous medium; and
(b) an anti-corrosion amount of a substantially water soluble salt-free antioxidant scavenger pigment comprising a cyanamide compound of a metal, said cyanamide compound of a metal containing no more than about 0.5% by weight of said soluble salts and wherein said metal is selected from the group consisting of zinc, nickel, cobalt, lead and mixtures thereof.
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Abstract
Soluble salt-free, contaminant-free antioxidant pigments which are cyanamide derivatives of metals, are provided in combination with organic resin polymers, as protective mirror backing coatings.
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Citations
12 Claims
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1. An article of manufacture comprising a glass substrate having a metal layer thereon, and a protective coating over said metal layer, said protective coating comprising the combination of:
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(a) an organic resin polymer selected from the group consisting of alkyd resins, acrylic resins, acrylic modified alkyd resins, polyurethane oils, vinyl halide polymers, vinyl halide copolymers, non-oil based urethane resin, and phenol-formaldehyde resins contained in aqueous or non-aqueous medium; and (b) an anti-corrosion amount of a substantially water soluble salt-free antioxidant scavenger pigment comprising a cyanamide compound of a metal, said cyanamide compound of a metal containing no more than about 0.5% by weight of said soluble salts and wherein said metal is selected from the group consisting of zinc, nickel, cobalt, lead and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An article of manufacture comprising a glass substrate having a metal layer thereon, and a protective coating over said metal layer, said protective coating comprising the combination of:
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(a) an organic resin polymer selected from the group consisting of alkyd resins, acrylic resins, acrylic modified alkyd resins, polyurethane oils, vinyl halide polymers, vinyl halide copolymers, non-oil based urethane, and phenol-formaldehyde resins; (b) a solvent; and (c) an anti-corrosion amount of a substantially water soluble salt-free antioxidant scavenger pigment comprising a cyanamide compound complexed with at least two metal equivalents, said cyanamide complex of said metal containing no more than about 0.5% by weight of said soluble salts and wherein said metal is selected from the group consisting of zinc, nickel, cobalt, lead, and mixtures thereof. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification