ECCOBOND F131

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

ECCOBOND F131

Main features

  • Clear Fiber-Optic Assembly Epoxy
  • Room-Temperature or Accelerated Heat Cure
  • High-Tg Cured Epoxy

Product Description

LOCTITE ECCOBOND F 131 BIPAX is a clear, two-part epoxy adhesive supplied in a BIPAX mixing-dispenser package for opto/photonics bonding. It is intended for terminating fiber optic connectors and assembling LED displays, lenses, and other optical components. The mixed adhesive has a typical viscosity of 1,800 mPa·s at 25°C and a 100:30 resin-to-hardener ratio by weight. It can cure at room temperature or with heat, with guideline schedules ranging from 18 hours at 25°C to 15 minutes at 90°C for one-drop applications. After cure, it has a typical glass transition temperature of 95°C and an operating-temperature range of -60 to 120°C.

Key features

  • Clear opto/photonics epoxy: Developed for fiber optic connectors, LED displays, lenses, and other optical components.
  • Flexible cure scheduling: Supports room-temperature curing or accelerated heat-cure schedules.
  • Cured mechanical performance: Provides a typical 95°C Tg and 25 N/mm² lap shear strength on aluminum-to-aluminum specimens.

Applications / Suitable for

  • Fiber optic connector termination
  • LED display assembly
  • Lens bonding
  • Other optical-component assemblies
Product Family

ECCOBOND F131

Loading pricing…
TDS, SDS & Technical Documents

Technical Specifications

Physical Properties
Thixotropic index
Thixotropic Index is a ratio of a material s viscosity at two different speeds in Ambient temperature, generally different by a factor of ten. A thixotropic material s viscosity will decrease as agitation or pressure is increased. It indicates the capability of a material to hold its shape. Mayonnaise is a great example of this. It holds its shape very well, but when a shear stress is applied, the material easily spreads. It helps in choosing a material in accordance to the application, dispense method and viscosity of a material.
1.0
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
1800 mPa.s
General Properties
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
100:30
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.
1.2
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.
95 °C

Additional Information

Technical properties

As-supplied / before-processing properties

Typical values for LOCTITE ECCOBOND F 131 BIPAX. Values are reference data and should not be treated as guaranteed specifications.

Property Value Unit Method / condition
Chemistry Epoxy — Two-component resin and hardener system
Color Clear — Mixed adhesive
Mix ratio 100:30 By weight Resin to hardener
Mixed viscosity 1,800 mPa·s At 25°C
Specific gravity 1.2 — Mixed adhesive
Thixotropic index 1.0 — Uncured material
Guideline cure schedules 18 h at 25°C; 1 h at 65°C; 15 min at 90°C — The 90°C schedule applies to one-drop applications; actual cure conditions may vary by application and equipment
Technical properties

After-processing / final-state properties

Typical cured-material properties. Mechanical and electrical results apply to the stated test configuration or condition.

Property Value Unit Method / condition
Operating temperature -60 to 120 °C Documented product operating-temperature range
Glass transition temperature 95 °C Typical Tg
Hardness 78 Shore D Cured material
Lap shear strength 25 N/mm² Aluminum-to-aluminum specimens; equivalent reported value 3,700 psi
Izod impact strength 0.22 ft-lb/in of notch Izod impact-strength test
Volume resistivity 1.00 × 1011 ohm·cm At 25°C

Leading Brands Trust in Our Products and Services

Products that Perform| Knowledge that Serves| Service that Delivers