VIBRATION-DAMPING MATERIAL

VIBRATION-DAMPING MATERIAL

PURPOSE:To provide a vibration-damping material composed of a lightly expanded urethane elastomer foam capable of effectively damping the oscillation under high load, by mixing a specific polyol mixture, a polyisocyanate, a chain extender, a foaming agent and a catalyst under a specific condition. C...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MOTOMIYA TATSUYA, SUZUKI TOSHIO, ITO ISAMU, OGAWA YOSHIHIKO
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
CHEMISTRY
COMPOSITIONS BASED THEREON
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
MEANS FOR DAMPING VIBRATION
MECHANICAL ENGINEERING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
SHOCK-ABSORBERS
SPRINGS
THEIR PREPARATION OR CHEMICAL WORKING-UP
THERMAL INSULATION IN GENERAL
WEAPONS
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Beschreibung
Zusammenfassung:PURPOSE:To provide a vibration-damping material composed of a lightly expanded urethane elastomer foam capable of effectively damping the oscillation under high load, by mixing a specific polyol mixture, a polyisocyanate, a chain extender, a foaming agent and a catalyst under a specific condition. CONSTITUTION:The objective material is composed of a lightly expanded urethane elastomer foam containing urethane bond, having a bulk density of 0.4- 0.75g/cm and obtained from the stock liquid of urethane elastomer foam composed of (A) a polyether polyol containing 2.5-4.5 functional groups and having a molecular weight of 2,000-3,500, (B) a vinyl monomer graft polyol containing 2.5-4.0 functional groups and having a grafting ratio of 4-20wt%, (C) a liquid polybutadiene polyol containing 2.0-3.0 functional groups and having a molecular weight of 2,000-7,000, (D) a polyisocyanate, (E) a chain extender, (F) a foaming agent, and (G) a urethanization catalyst, wherein the NCO index of the material is 90-110, and the amount of the component E is 0.3X10-1.5X10mol/g based on the components A-E.