Applications

LOCTITE® 4311™ – UV/visible light cure for bonding

Item Name: LOCTITE® 4311™
Manufacturer: Henkel
Technologies: Cyanoacrylate/UV (Ethyl cyanoacrylate with photoinitiator)
Color: Transparent, light yellow-green to dark blue-green liquid
Cure Type: Ultraviolet (UV) / Visible light; Secondary Cure: Humidity
Package Size: Contact to Avantek for details.
Shelf Life: Contact to Avantek for details.

1. Product Overview

LOCTITE® 4311™ is a one-part cyanoacrylate adhesive with UV/visible light curing and secondary humidity curing. It is designed for rapid fixturing, fillet cure, and surface cure, minimizing blooming and eliminating the need for solvent-borne accelerators. It is suitable for bonding plastics, rubbers, and metals and is compliant with ISO 10993 biocompatibility standards for medical device assembly.

2. Applications

  • Bonding of plastics, rubbers, and metals
  • Medical device assembly
  • Applications requiring fast curing with UV/visible light

3. Typical Properties

Uncured Properties

Property Value
Appearance Transparent, light yellow-green to dark blue-green liquid
Specific Gravity @ 25°C 1.06
Viscosity (mPa·s) 600 – 1,500
Fluorescence Positive under UV light

Curing Performance

Cure Method Depth of Cure (mm) Cure Time (s)
UV (365 nm, 100 mW/cm²) 6 60
LED (405 nm, 100 mW/cm²) 7 60
Tack-Free Time (365 nm, 30 mW/cm²) ≤10

Cured Properties

Property Value
Glass Transition Temperature (°C) 102
Shore Hardness (D) 84
Tensile Strength (MPa) 50
Elongation at Break (%) 5.2
Tensile Modulus (MPa) 1,860

Adhesive Performance (Block Shear Strength, ISO 13445)

Substrate Strength (N/mm²) Strength (psi)
Acrylic to Acrylic 14.2 2,050
Polycarbonate to Polycarbonate 22.4 3,260
Polycarbonate to Steel (grit blasted) 13 1,880

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