Production of coated structural elements comprising inorganic binders

US4185141A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Milan Krejci · Krefeld, DE
• Peter Kresse · Krefeld, DE

Key dates

• Filing date: Feb 2, 1978
• Grant date: Jan 22, 1980
• Expiry date: Feb 2, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B41/5089
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the production of a coated structural element by producing a workable composition of an inorganic binder and water, forming the composition into a structural element, providing an inorganic salt at least on the surface of the structural element, applying to the surface of the structural element an aqueous paste containing at least one metal oxide and waterglass thereby to form a gel-like non-fluid coating and hardening the coated structural element, the improvement which comprises hardening the structural element prior to applying the aqueous paste thereto, whereby the resulting coating is of enhanced weather resistance. The inorganic salt may be provided on the surface by being present in the workable composition per se or by being present in a facing layer applied to the structural element. It can also be provided by being sprayed thereon as an aqueous solution in which event the first hardening must precede such spraying. The resulting coatings are of enhanced weather resistance.