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Method for temporarily protecting glass articles

  • US 6,379,746 B1
  • Filed: 01/31/2000
  • Issued: 04/30/2002
  • Est. Priority Date: 02/02/1999
  • Status: Expired due to Term
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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