Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1989-09-05
1993-07-13
Bleutge, John C.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428195, 428413, 428901, B32B 104, B32B 308, B32B 2738
Patent
active
052272192
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.
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Bayer Heiner
Dittrich Frank
Rogalli Michael
Stelzl Hans
Bleutge John C.
Siemens Aktiengesellschaft
Wilson D. R.
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