STRUCTURAL ADHESIVES FOR RAPID CURE APPLICATIONS

The use of structural adhesives on automotive assembly lines requires systems compatible with various metal and polymer substrates, minimal surface preparation, and short cure or part handling times. Adhesives are unique among structural materials in having dominant interface properties which control both bond performance and its properties. Although some adhesives bond well to unprepared surfaces, all give improved performance with proper surface treatment. As a replacement for conventional fabrication techniques, adhesive bonding has several advantages: simpler design, lighter weight, greater structural strength, better surface finish, and adaptability to new types of structural materials. Although existing structural adhesive systems meet major performance requirements of bonding to unprepared surfaces, short cure times, and good strength properties, specifically designed adhesives should give further improvement. For example, tolerance for oily surfaces can be enhanced by using adhesives with a low viscosity at some stage of application or cure, using elevated temperatures, and using components with a good solvency for the contaminant and a high affinity for the substrate. Most structural adhesives need temperatures ranging from 65 degrees to 230 degrees F for desired short cure times which give good bond strengths. Although new modified acrylic adhesives hold promise for fast cure use at ambient temperatures, most structural adhesives will still require elevated temperatures for short cure times.

  • Availability:
  • Supplemental Notes:
    • Presented at SAE Congress and Exposition, Detroit, 26 February-2 March 1979.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Mahoney, C L
  • Publication Date: 1979

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00386663
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 790151, HS-029 219U
  • Files: HSL, USDOT
  • Created Date: Jun 28 1984 12:00AM