Method for temporarily protecting glass articles
First Claim
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1. A method for treating glass having at least one substantially flat surface comprising:
- (a) forming a hydrophobic coating on the surface by applying an aqueous solution comprising at least one surfactant to the surface as part of the manufacturing process for the glass, wherein;
(1) the manufacturing process produces newly formed glass at an elevated temperature;
(2) the newly formed glass is at a temperature above 175°
C. when it first comes into contact with the aqueous solution;
(3) the surfactant is selected from the group consisting of cationic surfactants, non-ionic surfactants, and betaines; and
(4) the coating reduces adhesion of glass chips to the surface;
(b) cutting the glass;
(c) grinding and/or polishing at least one edge of the cut glass; and
(d) removing the coating from the surface;
wherein;
(i) water or a water-containing solution is applied to the coated surface during at least one of steps (b) and (c); and
(ii) the coating has a sessile drop contact angle of at least 40°
after steps (b) and (c).
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Abstract
Methods for temporarily protecting a surface of a glass article by coating the surface are provided. The methods include forming a stable, hydrophobic, removable film on the surface at the end of the glass manufacturing process while the glass is still at an elevated temperature (e.g., above 175° C.). The film reduces chip adhesion to the surface as a result of cutting and grinding. After cutting and grinding, the film is removed allowing the glass to be used in such processes as the manufacture of liquid crystal displays (LCDs).
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Citations
31 Claims
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1. A method for treating glass having at least one substantially flat surface comprising:
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(a) forming a hydrophobic coating on the surface by applying an aqueous solution comprising at least one surfactant to the surface as part of the manufacturing process for the glass, wherein;
(1) the manufacturing process produces newly formed glass at an elevated temperature;
(2) the newly formed glass is at a temperature above 175°
C. when it first comes into contact with the aqueous solution;
(3) the surfactant is selected from the group consisting of cationic surfactants, non-ionic surfactants, and betaines; and
(4) the coating reduces adhesion of glass chips to the surface;
(b) cutting the glass;
(c) grinding and/or polishing at least one edge of the cut glass; and
(d) removing the coating from the surface;
wherein;
(i) water or a water-containing solution is applied to the coated surface during at least one of steps (b) and (c); and
(ii) the coating has a sessile drop contact angle of at least 40°
after steps (b) and (c).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification