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:
May. 03, 1977
Filed:
Mar. 29, 1976
Eduard Daume, Richterswil, CH;
Werkzeugmaschinenfabrik Oerlikon-Buhrle AG, Zurich, CH;
Abstract
A method of producing an inhibitor coating for a solid propellent charge for protecting against undesired burning-off, the inhibitor coating containing an insulating layer composed of a binder and a filler, a protective- and adhesion layer located between the insulating layer and the propellent charge. The binder consists of a castable mass which has poor smoke developing properties, the filler of a fine granular cooling agent possessing good packability, the protective- and adhesion layer of a completely set or cured polyisocyanate forming a barrier against plasticizer migration. For the insulating layer there is initially admixed a pre-adduct with the cooling agent, and subsequently adding an aromatic diamine, an aliphatic plasticizer or an aliphatic polyol.