Shelf Life Degradation of Selected Anaerobic Threadlocking Adhesives at Various Storage Temperatures

Shelf Life Degradation of Selected Anaerobic Threadlocking Adhesives at Various Storage Temperatures

This study addresses the shelf life degradation of three commercially available anaerobic adhesives maintained at 0 C, 22 C, and 50 C. A titrimetric procedure was developed to monitor the change in the adhesive peroxide initiator concentration over an 18 month period, The change was then related to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Bergquist, Paul R, Wentworth, Stanley E
Format: Report
Sprache:eng
Schlagworte:
ADHESIVE BONDING
ADHESIVES
Adhesives, Seals and Binders
ANAEROBIC PROCESSES
BOLTS
BONDED JOINTS
Camene hydroperoxides
CUMENES
DEGRADATION
DETERIORATION
FAILURE(MECHANICS)
HIGH TEMPERATURE
HYDROPEROXIDES
NUTS(FASTENINGS)
QUALITY CONTROL
SHELF LIFE
STABILITY
STORAGE
TEMPERATURE
THERMAL DEGRADATION
TITRATION
TORQUE
VIBRATION
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Beschreibung
Zusammenfassung:This study addresses the shelf life degradation of three commercially available anaerobic adhesives maintained at 0 C, 22 C, and 50 C. A titrimetric procedure was developed to monitor the change in the adhesive peroxide initiator concentration over an 18 month period, The change was then related to a corresponding decrease in the breakaway and prevailing torque strengths of bonded nuts and bolts prepared with aged adhesives. It was determined that elevated temperature storage caused degradation of the adhesives and that the titrimetric method could be useful as a quality control method were such storage may be unavoidable. Keywords: Adhesives, Anaerobic adhesives, Adhesive bonding, Shelf life, Fastenings, Hydroperoxides, Potentiometric analysis.