Method for improving durability of mirrors utilizing radiation curable coatings
First Claim
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1. A method of coating a mirror comprising:
- applying to a reflective layer of metal adhered to a transparent glass sheet a protective layer of a coating composition comprising a film-forming material and pigment particles which hardens to an opaque coating, and thereafter applying to said opaque coating, one or more protective layers wherein the outermost protective layer is a cured coating formed by exposing to ultraviolet light a liquid coating composition comprising an organic resin which is curable by ultraviolet light and which exhibits a film shrinkage for the cured coating of less than 10 percent upon curing as calculated from the following formula;
space="preserve" listing-type="equation">(D.sub.1 -D.sub.2)/D.sub.1 ×
100=Percent Shrinkage,whereinD1 is the density of said liquid coating composition, andD2 is the density of the cured coating.
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Abstract
Disclosed is a method of coating the metal side of a mirror by applying to a reflective layer of metal adhered to a transparent glass sheet one or more adherent protective layers wherein the outermost protective layer is a cured coating formed from a liquid coating composition which is curable by exposure to ultraviolet light (UV). The UV curable liquid coating composition has a high degree of resistance to shrinkage upon curing.
58 Citations
20 Claims
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1. A method of coating a mirror comprising:
- applying to a reflective layer of metal adhered to a transparent glass sheet a protective layer of a coating composition comprising a film-forming material and pigment particles which hardens to an opaque coating, and thereafter applying to said opaque coating, one or more protective layers wherein the outermost protective layer is a cured coating formed by exposing to ultraviolet light a liquid coating composition comprising an organic resin which is curable by ultraviolet light and which exhibits a film shrinkage for the cured coating of less than 10 percent upon curing as calculated from the following formula;
space="preserve" listing-type="equation">(D.sub.1 -D.sub.2)/D.sub.1 ×
100=Percent Shrinkage,wherein D1 is the density of said liquid coating composition, and D2 is the density of the cured coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- applying to a reflective layer of metal adhered to a transparent glass sheet a protective layer of a coating composition comprising a film-forming material and pigment particles which hardens to an opaque coating, and thereafter applying to said opaque coating, one or more protective layers wherein the outermost protective layer is a cured coating formed by exposing to ultraviolet light a liquid coating composition comprising an organic resin which is curable by ultraviolet light and which exhibits a film shrinkage for the cured coating of less than 10 percent upon curing as calculated from the following formula;
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11. A method of manufacturing a mirror comprising:
- applying a reflective layer of metal to a transparent glass sheet and applying to said reflective layer a protective layer of a coating composition comprising a film-forming material and pigment particles which hardens to an opaque coating, and thereafter applying to said opaque coating, one or more protective layers provided that the outermost protective layer is a cured coating formed by exposing to ultraviolet light a liquid coating composition comprising an organic resin which is curable by ultraviolet light and which exhibits a film shrinkage for the cured coating of less than 10 percent upon curing as calculated from the following formula
space="preserve" listing-type="equation">(D.sub.1 -D.sub.2)/D.sub.1 ×
100=percent shrinkage,wherein D1 is the density of said liquid coating composition, and D2 is the density of the cured coating. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- applying a reflective layer of metal to a transparent glass sheet and applying to said reflective layer a protective layer of a coating composition comprising a film-forming material and pigment particles which hardens to an opaque coating, and thereafter applying to said opaque coating, one or more protective layers provided that the outermost protective layer is a cured coating formed by exposing to ultraviolet light a liquid coating composition comprising an organic resin which is curable by ultraviolet light and which exhibits a film shrinkage for the cured coating of less than 10 percent upon curing as calculated from the following formula
Specification
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Current AssigneeLilly Industries Limited
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Original AssigneePPG Industries Incorporated (Nouryon BV)
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InventorsSirkoch, Robert J., Henning, Calvin C., Greigger, Paul P., Niederst, Ken W., Weissberg, Alan B.
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Primary Examiner(s)NOT, DEFINED
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Application NumberUS06/944,777Time in Patent Office512 DaysField of Search427/44, 427/54.1, 427/162US Class Current427/514CPC Class CodesG02B 1/105 Protective coatingsG02B 1/14 Protective coatings, e.g. h...G02B 5/0808 having a single reflecting ...
