LOCTITE AA 3936

Harmonization Code : 3907.30.00.40 | Epoxy Mold Compounds containing by weight more than 70 % silicon dioxide

LOCTITE 3936

Main features

  • Medium-Viscosity Gap Control
  • Sub-Five-Second Light Fixturing
  • Flexible Cannula Bonding

Product Description

LOCTITE AA 3936 is a one-component, medium-viscosity UV/visible-light acrylic adhesive for cannula bonding and precision medical-device assembly. The transparent-to-slightly-hazy liquid requires no mixing, fluoresces under UV light, and reaches fixture strength in under 5 seconds under the specified 365 nm light conditions. Its 8,000 to 14,000 mPa s viscosity is suited to dispensing adhesive on the cannula before hub assembly, larger cannula-to-hub gaps, and geometries where the cannula ends in the core pin bore. After cure, the material has 300% elongation and Shore D 55. Applications include hubs, syringes, and lancets using stainless steel cannulae.

Key features

  • Medium-Viscosity Placement: The 8,000 to 14,000 mPa s range supports pre-applied cannula adhesive and larger hub gaps.
  • Sub-Five-Second Fixture: Fixture strength develops in under 5 seconds at the listed 365 nm light conditions.
  • Flexible Cured Material: The cured adhesive provides 300% elongation with Shore D 55 hardness.

Applications / Suitable for

  • Bonding stainless steel cannulae into hubs
  • Larger-gap cannula-to-hub joints
  • Syringe and lancet needle assembly
Product Family

LOCTITE AA 3936

Loading pricing…
TDS, SDS & Technical Documents

Technical Specifications

General Properties
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.1
Thermal Properties
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding. The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
66 °C
Physical Properties
Tack-Free Time
>60 minutes
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
8,000 to 14,000 mPa.s
Chemical Properties
Water Absorption
4.1 %
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.
300 %

Additional Information

Technical properties

As-supplied / before-processing properties

Typical values for the uncured or as-supplied product unless otherwise noted.

PropertyValueUnitMethod / condition
AppearanceTransparent to slightly hazy-Uncured
UV fluorescencePositive-Uncured material under UV light
Specific gravity1.1-25 deg C
Viscosity8,000 to 14,000mPa sBrookfield RVT, spindle 5, 20 rpm, 25 deg C
Technical properties

After-processing / final-state properties

Typical values for the cured product under the listed methods and conditions.

PropertyValueUnitMethod / condition
Glass transition temperature66deg CASTM E 228; cured 30 seconds per side at 100 mW/cm^2 and 365 nm
Shore hardness55Durometer DISO 868; same cure
Elongation at break300%ISO 527-3; same cure
Tensile strength19N/mm^2ISO 527-3; same cure
Tensile modulus169N/mm^2ISO 527-3; same cure
Block shear strength19.0N/mm^2ISO 13445; polycarbonate to polycarbonate; cured 30 seconds at 100 mW/cm^2 and 365 nm

Leading Brands Trust in Our Products and Services

Products that Perform| Knowledge that Serves| Service that Delivers