Loctite SF 7701 - 52 ml, primer

Loctite SF 7701 is a special primer based on aliphatic amines designed for preparing surfaces with low surface energy, such as polyolefins (polyethylene, polypropylene), polytetrafluoroethylene (PTFE), and thermoplastic rubber materials. This product significantly improves the adhesion of LOCTITE cyanoacrylate adhesives on difficult-to-bond substrates. It is ideal for medical applications and single-use medical devices, but not suitable for applications requiring high peel strength.

Advantages:

• Improves the adhesion of instant adhesives on difficult-to-bond plastics.
• Suitable for polyolefins, PTFE, and thermoplastic rubbers.
• Suitable for applications in the field of medical devices.
• Low viscosity and fast drying (within 30 seconds).

Technical parameters:

• Technology: Primer for cyanoacrylates
• Chemical type: Aliphatic amine
• Solvent: n-Heptane
• Concentration of active ingredients: 0.08 to 0.12 %
• Appearance: Clear colorless liquid
• Fluorescence: Positive under UV light
• Specific gravity at 25 °C: 0.68
• Viscosity at 20 °C: 1.25 mPa·s
• Drying time at 20 °C: ≤30 seconds
• Lifetime on part: ≤8 hours
• Shear strength (ISO 4587): 1–10 N/mm² (depending on the combination of adhesive and substrate)
• Heat resistance: Tested on polypropylene at elevated temperatures (20–120 °C)

Application:
Loctite SF 7701 is ideal for preparing low-energy surfaces that are difficult to bond with conventional adhesives. It is mainly used on polyolefins, PTFE, and thermoplastic rubbers. Typical applications include medical instruments, single-use medical devices, and industrial parts made from difficult-to-bond plastics.