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:
Apr. 27, 1976
Filed:
May. 03, 1974
Bayer Aktiengesellschaft, Leverkusen, DT;
Abstract
A substrate to be used as a support for a release coating is provided with a powdery release support with a release agent which is substantially non-tacky by applying on the support an aqueous solution, dispersion or paste containing a lactam compound which is water soluble, swells in water or forms a paste with water, drying the resulting coating. The process comprises treating the release agent, drying the release agent, applying a polyurethane coating over the release support and then removing the polyurethane coating from the release support. The release agent is selected from lactams and addition compounds of lactams with water, oximes, amines, monofunctional or polyfunctional alcohol or thioalcohols and mixture thereof.