Processing Adhesives
- Danger of poisoning from breathing in vapours or from swallowing adhesive.
- Risk of injury due to contact with skin or eyes.
→ Ventilate the work area well.
→ Do not eat, drink, or smoke while carrying out work.
→ Avoid direct contact with eyes and skin. Wear suitable protective equipment, such as protective clothing, gloves, and if necessary, a protective mask.
→ If clothing is soiled with adhesive, change clothing immediately and only use again after they have been cleaned.
→ Also observe the product-specific processing and safety instructions on the packing container and packing container imprints.
→ In case of eye contact: Rinse eyes immediately and thoroughly with lukewarm running water and consult an eye doctor.
→ In case of skin contact: Rinse contacted skin areas immediately with lukewarm running water and soap.
→ If adhesive is swallowed: Rinse mouth and consult a doctor.
- Bonding surfaces must be free from oil, old adhesive, dirt, moisture, and layers of paint and oxide.
- Body structural adhesive and primer must only be used on bare metal parts.
- Ensure that clean gloves are worn when touching cleaned surfaces to avoid transferring sweat from the hands and dirt onto the bonding area.
- The jointing operation must take place directly after application of the adhesive in order to guarantee a high quality and reliable bond. Otherwise the adhesive bead must be removed, with pre-treatment of the surface and application of the adhesive being repeated.
- After adhesive has hardened, carefully prime accessible bonding areas and seal with body sealant. Protect bonding areas in cavities with cavity preservation against corrosion.
Preparing adhesive flanges
To improve adhesion, the bonding surfaces must be roughened using sandpaper with a grain of 100 to 150. Remove paint layers (cathodic immersion painting) using dry sandpaper or fibre discs with a grain of 100 to 150. The bare bonding surface must then be cleaned with a lint-free cloth soaked in acetone. Leave cleaned areas to dry for approx. 1 - 2 minutes; bonding surfaces must be completely dry. Apply primer to the cleaned surfaces. → 2-K-SIP
Bonding operation Minimum ambient and material temperature during working and hardening is 18° C. The coating thickness of approx. 1 mm should not be exceeded; if necessary, spread the mixed adhesive on the bonding surface with a spatula. Areas not covered by cathodic immersion painting and exposed body panels in cavities must be brushed or filled with structural adhesive.
Jointing operation Join, fix and resistance spot-weld parts within the working time. The jointing operation must take place directly after application of the adhesive in order to guarantee a high quality and reliable bond. Otherwise the adhesive bead must be removed, with pre-treatment of the surface and application of the adhesive being repeated.
Remove excess material Remove most of the excess material with paper or cloth. Finish cleaning visible surfaces with a cloth soaked in acetone. Hardened material can only be removed mechanically.
Hardening The body structural adhesive used hardens at room temperature. Hardening can be accelerated by heat (e. g. with an infra-red radiator in a painting booth). Do not load bonded parts until hardening is complete.
| Betamate 2096 adhesive set | ||
| Initial strength at 23 °C | Approx. 10 h (1) | |
| Initial strength at 60 °C | Approx. 2 h (1) | |
| Hardening time at room temperature (23 °C) | Approx. 170 h | |
|
Corrosion protection After adhesive has hardened, carefully prime accessible bonding areas and seal with body sealant. Protect bonding areas in cavities with cavity preservation against corrosion.
Further work on the vehicle The time from joining the repaired components to handing over the vehicle to the customer must be at least 48 hours. After repairs with adhesive, allow at least ten hours before moving or carrying out further work on the vehicle (leave standing overnight) to avoid damage to the bonded joint by premature loading.
Disposal Small amounts remaining after mixing and complete hardening may be disposed of as industrial waste. Dispose of used acetone-soaked cleaning cloths as special-category waste.