Pigmented mirror resin coatings
AssigneeSureguard, Inc.
InventorsMathew Stephen, Ole G. Torgussen
Life of this patent
Estimating the term…
Abstract
Mirror resin backings containing antioxidant pigments which are cyanamide derivatives of metals, are protective backing coatings for glass substrates and mirrors. The resin backings are melamine based resin coatings which provide anti-corrosion protection for the metal layers with metal cyanamide antioxidant pigments.
Claims13
An article of manufacture comprising a glass substrate having a metal layer thereon, and a protective coating over said metal, said protective coating comprising a durable and long term protective coating for thin metal films, said protective coating being formed from an aqueous based coating composition which comprises the combination of:
- (a) an organic resin polymer selected from the group consisting of alkyd resins and acrylic resins, each of said resins being combined with a sufficient amount of a melamine resin to cause cross linking with said alkyd resin or acrylic resin;
- (b) a solvent;
- and
- (c) an anti-corrosion amount of an antioxidant scavenger pigment comprising a cyanamide compound of a metal, wherein said metal is selected from the group consisting of zinc, nickel, cobalt, lead, mixtures thereof, and blends of metal cyanamides;
- said coating being formed from an aqueous based coating composition as follows:
- ______________________________________ COMPONENT AMOUNT (wt. %) ______________________________________ Alkyd resin or Acrylic Resin 10-45 and melamine resin Solvent 5-25 Pigment 3-65 Water 10-40 ______________________________________
- and wherein the mixture of melamine resin with said alkyd resin or acrylic resin is effective to form a hard resin backing over said metal which minimizes corrosive effects.
A composition for forming a protective coating on a thin metal layer applied to the back of a mirror, said protective coating being formed from an aqueous based coating composition, which comprises the combination of:
- (a) an organic resin polymer selected from the group consisting of alkyd resins and acrylic resins, each of said resins being combined with a sufficient amount of a melamine resin to cause cross linking with said alkyd resin or acrylic resin;
- (b) a solvent;
- and
- (c) an anti-corrosion amount of an antioxidant scavenger pigment comprising a cyanamide compound of a metal, wherein said metal is selected from the group consisting of zinc, nickel, cobalt, lead, mixtures thereof, and blends of metal cyanides;
- said coating being formed from an aqueous based coating composition as follow:
- ______________________________________ COMPONENT AMOUNT (wt. %) ______________________________________ Alkyd resin or Acrylic Resin 10-45 and melamine resin Solvent 5-25 Pigment 3-65 Water 10-40 ______________________________________
- and wherein the mixture of melamine resin with said alkyd resin or acrylic resin is effective to form a hard resin backing over said metal which minimizes corrosive effects.
Dependencies are inferred from the claim text.