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LOCTITE ECCOBOND LUX OGRFI146T – Adhesive – Optical, Fiber Optic, and Optoelectronic Devices

  • Item Name: LOCTITE ECCOBOND LUX OGRFI146T
  • Manufacturer: Henkel
  • Technologies: Acrylate
  • Color: Clear
  • Cure Type: Ultraviolet (UV)/visible light and heat cure
  • Package Size: Contact to Techniq VN for details.
  • Shelf Life: 6 months

1. Product Overview

LOCTITE ECCOBOND LUX OGRFI146T is a single-component, photocurable adhesive specifically designed for optical, fiber optic, and optoelectronic device assembly. This acrylate-based adhesive offers a low refractive index, making it ideal for high-precision optical applications. It cures rapidly under UV or visible light and also features a secondary thermal cure mechanism for shadowed areas where light cannot penetrate. The product is designed for bonding silicon and ceramics and ensures high productivity in assembly processes.

2. Applications

  • Bonding and assembly of optical, fiber optic, and optoelectronic devices
  • Suitable for silicon and ceramics substrates
  • Used in precision optical applications requiring a low refractive index
  • Dual-curing capability (UV/visible light and thermal cure) for shadowed areas

3. Typical Properties

Uncured Material

Property Value
Technology Acrylate
Color Clear
Viscosity (Brookfield, 25°C) 1,250 mPa·s (Spindle 27, 10 rpm)
Work Life (25°C) 91 days
Shelf Life (0 to 5°C) 183 days
Shelf Life (25°C) 91 days

Curing Conditions

Cure Type Condition
UV Cure 500 mW/cm² for 8 seconds (or 4,000 mJ/cm²)
Visible Light Cure 600 mW/cm² for 30 seconds (or 18 J/cm²)
Thermal Cure 1 hour at 100°C or 2 hours at 85°C

Cured Material Properties

Property Value
Hardness (Shore D) 64
Glass Transition Temperature (Tg) 85°C (DMTA), 188°C (DSC)
Coefficient of Thermal Expansion Below Tg: 71 ppm/°C, Above Tg: 214 ppm/°C
Water Absorption (85°C/85 RH) 1.5%
Refractive Index 1.463 (589 nm), 1.449 (1,550 nm)

Tensile Modulus (DMTA)

Temperature Value
-65°C 1,600 N/mm² (240,000 psi)
25°C 650 N/mm² (94,000 psi)
100°C 7.2 N/mm² (1,100 psi)
150°C 3.4 N/mm² (500 psi)
200°C 4.4 N/mm² (640 psi)

Adhesion Performance (Alumina to Glass, Post Cure)

Condition Adhesion Strength
@ 25°C 20.1 N/mm² (2,910 psi)
@ 25°C w/ Silane 18.3 N/mm² (2,650 psi)
After 1,000 hrs @ 85°C/85% RH 4.5 N/mm² (650 psi)
After 72 hrs PCT, 121°C @ 100% RH 3.2 N/mm² (470 psi)

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BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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