Preparation and method for coating glass vessels

US5314534A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Joachim Giersberg · Recklinghausen, DE
• Hartmut Gomm · Mühlheim, DE
• Dirk Naumann · Lorsch, DE

Key dates

• Filing date: Jul 20, 1992
• Grant date: May 24, 1994
• Expiry date: Jul 20, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2217/211
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Glass vessels are coated by spraying a solution containing 100 to 1,000 g/L of (OH).sub.2 SnCl.sub.2 on the 500.degree. to 600.degree. C. hot outer surface of the glass vessels. The solution may contain oxalic acid and a portion of the (OH).sub.2 SnCl.sub.2 compound may be substituted by a compound (HO).sub.x Sn(C.sub.2 O.sub.4).sub.y, wherein y is 0.2 to 3.8, y is 1.9 to 0.1 and (2y+x)=4. The coatings are uniform.