GB1057871A - Glass mirrors having improved resistance to tarnishing - Google Patents
Glass mirrors having improved resistance to tarnishingInfo
- Publication number
- GB1057871A GB1057871A GB1774762A GB1774762A GB1057871A GB 1057871 A GB1057871 A GB 1057871A GB 1774762 A GB1774762 A GB 1774762A GB 1774762 A GB1774762 A GB 1774762A GB 1057871 A GB1057871 A GB 1057871A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chelating agent
- lacquer
- atom
- resins
- dissolved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/38—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal at least one coating being a coating of an organic material
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The resistance to tarnishing by S and S compounds of a mirror comprising a metal layer on a glass substrate is improved by contacting a chelating agent with the external surface of the metal layer so that the chelating agent and surface react. The mirror comprises glass coated e.g. with Ag alone or Ag and then Cu. The metal layer may be treated with the chelating agent dissolved in an inert solvent such as butanol and subsequently be given a protective lacquer coating. Alternatively, it may be treated with chelating agent incorporated in lacquer optionally followed by further coating with lacquer. Specified chelating agents are nitrogenous 5-membered ring compounds having in the 5-membered ring two non-adjacent N atoms, one at least of which is attached to N, and two adjacent C atoms each of which is attached to a different N atom, and having as the fifth ring-closing atom either a tetravalent C atom or a trivalent N atom. In the case of Ag, the chelating agent may be mercaptobenzthiazole. In the case of Cu it may be benztriazole, E.D.T.A. or guanidino benzimidazole. Many lacquers are described.ALSO:The resistance to tarnishing of a mirror is improved by contacting it with a chelating agent incorporated in a lacquer. The lacquer may be a stoving lacquer produced from 85-15% alkyd resins (e.g. based on saturated or unsaturated fatty acids) and 15-85% thermosetting resins (e.g. urea formaldehyde) in admixture. In Example 1, castor oil alkyd resin containing phthalic anhydride and dissolved in an aromatic hydrocarbon solvent is mixed with a melamine formaldehyde resin dissolved in a mixture of xylene and butanol. Benzatriazole is added as chelating agent. In other examples the chelating agent is mercaptobenzthiazole (IIa), benzotriazole (IIb), guanidino-benzimidazole (IIc) and EDTA (IId). This laquer is over-coated with another composition comprising red lead, a non-drying oil alkyd, phthalic anhydride, an aromatic hydrocarbon, a melamine/formaldehyde resin, xylene and butanol.ALSO:The resistance to tarnishing by S and S compounds of a mirror comprising a metal layer on a glass substrate is improved by contacting a chelating agent with the external surface of the metal layer so that the chelating agent and surface react. The mirror comprises glass coated, e.g. with Ag alone or Ag and then Cu. The metal layer may be treated with the chelating agent dissolved in an inert solvent such as butanol and subsequently be given a protective lacquer coating. Alternatively, it may be treated with chelating agent incorporated in lacquer optionally followed by further coating with lacquer. Specified chelating agents are nitrogenous 5-membered ring compounds having in the 5-membered ring two non-adjacent N atoms, one at least of which is attached to N, and two adjacent C atoms each of which is attached to a different N atom, and having as the fifth ring-closing atom either a tetravalent C atom or a trivalent N atom. In the case of Ag, the chelating agent may be mercaptobenzthiazole. In the case of Cu it may be benztriazole, E.D.T.A. or guanidino benzimidazole. The lacquers may comprises: 1) oxygen convertible coatings such as a) varnishes prepared from a drying oil and a hard resin or b) alkyd resins based on drying oils; 2) heat convertible coatings such as a) lacquers prepared from a blend of a saturated fatty acid alkyd and an amine resin or b) epoxide resins blended with amine resins; 3) catalysed convertible coatings such as a) lacquers prepared from epoxide resins and catalysed with organic amines or polyamide resins; 4) non-convertible coatings such as a) shellac in alcoholic solution, b) an acrylic acid ester polymer in xylene solution or c) a vinyl acetate polymer dispersed in water. The lacquers may be stoving lacquers produced from 85-15% alkyd resins (e.g. based on saturated or unsaturated fatty acids) and 15-85% thermosetting resins (e.g. urea formaldehyde or melamine formaldehyde) in admixture. In Example 1, 85 parts by weight of a drying castor oil alkyd resin containing 40% of phthalic anhydride and dissolved in 85 parts by weight of an aromatic hydrocarbon solvent were mixed with 15 parts by weight of a melamine formaldehyde resin dissolved in 10 parts by weight of a mixture of xylene and butanol. To the mixture was added 3 parts of benzotriazole dissolved in 27 parts of butanol.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1774762A GB1057871A (en) | 1962-05-09 | 1962-05-09 | Glass mirrors having improved resistance to tarnishing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1774762A GB1057871A (en) | 1962-05-09 | 1962-05-09 | Glass mirrors having improved resistance to tarnishing |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1057871A true GB1057871A (en) | 1967-02-08 |
Family
ID=10100520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1774762A Expired GB1057871A (en) | 1962-05-09 | 1962-05-09 | Glass mirrors having improved resistance to tarnishing |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1057871A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4880668A (en) * | 1986-03-27 | 1989-11-14 | Ppg Industries, Inc. | Mirror protective composition comprising 2-mercaptothiazoline |
US5008153A (en) * | 1988-12-08 | 1991-04-16 | Ppg Industries, Inc. | Corrosion inhibitive pretreatment for "copper-free" mirrors |
GB2307194A (en) * | 1995-11-20 | 1997-05-21 | Glaverbel | Protective coating for a copper-free reflective metal layer |
WO2002040419A1 (en) * | 2000-11-15 | 2002-05-23 | Saint-Gobain Glass France | Object with metallic layer, method for making same and uses |
-
1962
- 1962-05-09 GB GB1774762A patent/GB1057871A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4880668A (en) * | 1986-03-27 | 1989-11-14 | Ppg Industries, Inc. | Mirror protective composition comprising 2-mercaptothiazoline |
US5008153A (en) * | 1988-12-08 | 1991-04-16 | Ppg Industries, Inc. | Corrosion inhibitive pretreatment for "copper-free" mirrors |
GB2307194A (en) * | 1995-11-20 | 1997-05-21 | Glaverbel | Protective coating for a copper-free reflective metal layer |
GB2307194B (en) * | 1995-11-20 | 1999-07-28 | Glaverbel | Method of forming a protective layer on a copper-free reflective metal layer |
US6147803A (en) * | 1995-11-20 | 2000-11-14 | Glaverbel | Method of forming a protective layer on a copper-free reflective metal layer |
WO2002040419A1 (en) * | 2000-11-15 | 2002-05-23 | Saint-Gobain Glass France | Object with metallic layer, method for making same and uses |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS60200986A (en) | Corrosion preventing or inhibiting composition and use | |
US3837875A (en) | Composition for cleaning, sealing, preserving, protecting and beautifying host materials | |
GB657545A (en) | Manufacture of polyvinyl acetate emulsion paints | |
GB1057871A (en) | Glass mirrors having improved resistance to tarnishing | |
US4391965A (en) | Curing agents | |
RU2394864C1 (en) | Method of producing antifouling enamel | |
US1962132A (en) | Organo metallic protective agent | |
US2930708A (en) | Inhibiting corrosion in metals | |
US3333977A (en) | Water-dispersible coating compositions and phenolic wood bases coated therewith | |
US3333978A (en) | Water-dispersible coating compositions and phenolic wood bases coated therewith | |
DE1669089A1 (en) | Primer | |
US2518438A (en) | Protective coatings | |
US4100119A (en) | Greater water resistance and shorter drying time in water soluble enamel paints | |
JPS61107981A (en) | Method for forming corrosion-proof film | |
US4313860A (en) | Non-photochemically reactive antifouling paint | |
CA1096155A (en) | Corrosion resistant coating from water thinnable amino ethylated interpolymers | |
DE862861C (en) | Process for the production of coatings on light metals | |
US2507239A (en) | Protective coating compositions | |
US1791879A (en) | Varnishing preparation | |
DE968285C (en) | Drying paints | |
DE734019C (en) | Matt lacquers | |
ES356204A1 (en) | Process for the preparation of high-viscosity alkyd resins | |
RU2115680C1 (en) | Antifouling and anticorrosion dye | |
JPH0231751B2 (en) | ||
US1923704A (en) | Viscosity reduced coating composition |