Next Generation Structural Adhesives for Improved Processing Properties

• Lightweight Design Potential

• Diversity in Bonding Technologies

• Why Structural Adhesives?

• Improvements in Body Shop Adhesives

Targeted CO 2 emissions for vehicle fleet

• Continuing specifications under elaboration

• Regulations differ significantly in dependence of the region

• The car body contributes ~35-40% of vehicle’s entire mass

• The vehicle mass contributes ~25% of fuel consumption

• Toughened Epoxy based structural adhesives for body shop application

• High elastic PU based structural adhesives for trim shop applications

• Elimination of stress concentration resulting in enhanced fatigue and durability

• Increase in load transfer efficiency

• Reduction of sheet metal thickness

• Reduction of spot welds

• >300 % increase in joint strength at failure

• >300 % increase in displacement at failure

• High ductility at a broad range of temperatures

New Specialty Toughening Technology

 Increased adhesive modulus

 Maintains high fracture toughness

 Significant increase in fatigue durability

 Consistent fatigue failure mode

The global manufacturing and the shipment of closure panels and entire bodies requires adhesives which offer improved humidity resistance.

 Improved adhesive hydrophobicity by new components improves open time storage

 Innovative catalysis offers excellent bulk viscosity stability

 Consistent lap shear strength when cured at a broad range of temperatures

 Consistent performance on a variety of steel grades

 Good impact strength when cured at a broad range of temperatures

 Good T-Peel strength at all bond line thicknesses

New Technology

 Improved wash-off resistance while maintaining pumpability

 Typical storage stability >6 months at room temperature

 Optimized rheology for superior wash-off resistance

 Wash-off tests on lubricant treated HDG steel

• New Toughening Technology

− Offers significant improvements in tensile modulus without affecting the adhesive ductility

− Will provide improved stiffness/NVH and enable OEMs to downgauge high strength steels

• Improved vehicle longevity through improvements of

− Fatigue durability

− Environmental resistance

• Greener manufacturing processes offered without sacrificing performance

• Improved wash-off performance without sacrificing cold-pumpability through robotic applicators