LOCTITE 5055

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

LOCTITE 5055

Main features

  • Low-Viscosity Medical Assembly Bonding
  • Fast UV/Visible Tack-Free Cure
  • Tough Transparent Silicone Rubber

Product Description

LOCTITE SI 5055 is a one-component, low-viscosity alkoxy silicone adhesive that cures with UV and visible light. Typical viscosity is 200 to 850 mPa s at 25 deg C for the light-yellow transparent liquid. Under specified 365 nm exposure, its surface can become tack-free in 30 seconds or less. After cure, it forms a transparent silicone rubber with Shore A hardness of 57, 161% elongation and 9.3 N/mm^2 tensile strength under the stated conditions. The grade is used for bonding, potting, coating and sealing in disposable medical-device assemblies.

Key features

  • Low-viscosity liquid: Typical viscosity is 200 to 850 mPa s at 25 deg C by Brookfield RVT.
  • Fast light cure: A tack-free surface develops in 30 seconds or less under specified 365 nm exposure.
  • Transparent elastomer: The cured silicone combines Shore A 57 hardness with 161% elongation under the stated cure.

Applications

Bonding, potting, coating and sealing, particularly for disposable medical-device assemblies.

Product Family

LOCTITE 5055

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Light yellow, transparent liquid
Chemistry Type
Alkoxy silicone
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.
0.98
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
200 to 850 mPa.s
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.
>80 %
Other Properties
Storage Temperature
8 °C to 21 °C

Additional Information

Technical properties

As-supplied / before-processing properties

PropertyValueUnitMethod / condition
AppearanceLight yellow, transparent liquidUncured; LMS
Specific gravity0.98Typical; uncured
Viscosity200 to 850mPa sLMS; Brookfield RVT; spindle 2; 20 rpm; 25 deg C
Technical properties

After-processing / final-state properties

PropertyValueUnitMethod / condition
Shore hardness57Shore ATypical; ISO 868; 70 mW/cm^2 at 365 nm for 60 s/side, then 24 h at 22 deg C/50 +/- 5% RH
Elongation at break161%Typical; ISO 527-3; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH
Tensile strength at break9.3N/mm^2Typical; ISO 527-3; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH
Dielectric breakdown strength15.3kV/mmTypical; IEC 60243-1; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH
Volume resistivity1.10 x 10^15ohm cmTypical; IEC 60093; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH
Lap shear strength - polycarbonate to aluminum4.5N/mm^2Typical; UV-transmitting polycarbonate; stated light cure plus 24 h at 22 deg C/50 +/- 5% RH

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