Enamel frit and a one-bake two- and multilayer enamelling process

US4486542A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Otto Krist · Overath, DE
• Herbert Salzburg · Leichlingen, DE

Key dates

• Filing date: Sep 21, 1983
• Grant date: Dec 4, 1984
• Expiry date: Sep 21, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C8/16
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the enamelling of metal by applying a ground coat containing an additive, subsequently applying a cover coat, and baking the structure, the improvement which comprises employing as the additive a complexing agent having a solubility in water at 25.degree. C. and at a pH-value of from 4 to 9 of greater than about 0.05 g/l, with the exception of saccharides and their oxidation, reduction and modification products and polyethylene glycol containing up to 50 carbon atoms per molecule.