LOCTITE 3301

Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.

LOCTITE 3301

Main features

  • Low-Viscosity Close-Fit Assembly
  • Five-Second Light Fixture
  • Transparent Flexible Bonding

Product Description

LOCTITE AA 3301 is a transparent, low-viscosity acrylated urethane adhesive that develops bonds through UV or visible-light exposure. The one-part liquid has a typical viscosity of 150 mPa s at 25 deg C and is designed for close-fitting PVC-to-polycarbonate assemblies. Under specified light conditions, it develops fixture strength in 5 seconds, supporting fast placement and handling. The cured adhesive remains transparent and provides a Shore D hardness of 69 with 50% elongation. Applications include bonding PVC tubing to polycarbonate, glass, plastics, and metals, including supported disposable medical-device assembly.

Key features

  • Low-Viscosity Close Fit: A typical viscosity of 150 mPa s at 25 deg C suits close-fitting PVC-to-polycarbonate assemblies.
  • Five-Second Fixture: The 0.1 N/mm^2 shear fixture threshold is reached in 5 seconds under the listed light conditions.
  • Transparent Cured Bond: The cured material remains transparent with Shore D hardness 69 and 50% elongation.

Applications

Close-fitting PVC-to-polycarbonate bonding, glass, plastic, and metal assemblies, and supported disposable medical-device assembly.

Product Family

LOCTITE 3301

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Transparent liquid
Chemistry Type
Acrylated urethane
Refractive index
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material. The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
1.48
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
150 mPa.s
Other Properties
Storage Temperature
8°C to 21 °C
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
50 %
Chemical Properties
Water Absorption
3 %
Electrical Properties
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
9.2×10¹⁴ Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

PropertyValueUnitMethod / condition
AppearanceTransparent liquidUncured; typical
Refractive index1.48DimensionlessUncured; typical
Viscosity150mPa sBrookfield RVT, spindle 1, 20 rpm, 25 deg C
Fixture time5secondsGlass slides; CL42 LED flood light; 514 mW/cm^2 at 405 nm
Fixture time5secondsPolycarbonate; metal-halide lamp; 30 mW/cm^2 at 365 nm
Technical properties

After-processing / final-state properties

Cured-material values use the listed light-cure conditions; row-specific methods and bond geometry remain explicit.

PropertyValueUnitMethod / condition
Shore hardness69Shore DISO 868; cured at 30 mW/cm^2, 365 nm, for 80 seconds
Refractive index1.51DimensionlessCured material; typical
Water absorption3%ISO 62; 2 hours in boiling water
Elongation at break50%ISO 527-3; typical
Tensile strength at break19N/mm^2ISO 527-3; typical
Tensile modulus738N/mm^2ISO 527-3; typical
Dielectric breakdown strength34kV/mmTypical cured material
Lap shear strength5N/mm^2Polycarbonate; 0.5 mm gap; substrate failure; 30 mW/cm^2 at 365 nm for 80 seconds

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