The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 01, 1980
Filed:
Sep. 06, 1978
Johann Obendorf, Dorsten, DE;
Gunter Dormann, Bochum, DE;
Rainer Gras, Herne, DE;
Elmar Wolf, Herne, DE;
Chemische Werke Huls Aktiengesellschaft, Herne, DE;
Abstract
A method for the coating of glass surfaces in order to prevent the scattering of glass particles upon bursting, with a transparent, duroplastic protective coat by depositing a paste of hydroxy group-containing 1,2-epoxy compounds with at least one 1,2-epoxide group in the molecule and a lower melting point of more than 40.degree. C. and hardening agents, and hardening the overlay at higher temperatures; which comprises first treating the clean glass surface with an aqueous or alcoholic silane skim coat, drying said surface if necessary and thereafter warming said surface to a temperature up to 120.degree. C., coating the glass surface with said paste of hydroxy group containing 1,2-epoxy compounds and hardening said paste with further addition of heat, wherein said hardening agents are polyisocyanates blocked with cyclic amidines of the general formula ##STR1## wherein the R's are the same or different substituents selected from the group consisting of hydrogen, alkyl-, cycloalkyl-, arylalkyl- and aryl, wherein the hardening agent is added in an amount of 2-15% by weight, calculated with respect to the amount of 1,2-epoxide compounds.