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. 13, 1993
Filed:
Sep. 05, 1989
Heiner Bayer, Olching, DE;
Michael Rogalli, Munich, DE;
Frank Dittrich, Kirchseeon, DE;
Hans Stelzl, Vaterstetten, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An acoustically matched reaction resin compound for damping coating of surface wave components is disclosed that contains one or more epoxy resins, one or more dicarboxylic acids or polycarboxylic acids or, respectively, acidic esters of dicarboxylic acids or polycarboxylic acids, an aliphatic or hetero-aromatic amine in a proportion sufficient to catalyze the cross linking of the reaction resin compound, and a solvent. The number of amine hydrogen equivalents and acid equivalents together is less than the number of epoxy equivalents and the uniformly mixed reaction resin compound can be set to a predetermined viscosity and thixotropy required for the application. For example, the reaction resin compound can be applied onto the wafer containing the surface wave components in a silk screening process. Sharp contours can be produced that survive the curing process in an unmodified state. The damping properties of cured reaction resin structures are excellent; corrosion induced by the resin is noticeably reduced.