Applications

LOCTITE® ECCOBOND EN UV9700 – Acrylate Encapsulant – PCB circuit board protection and electronic component encapsulation

  • Item Name: LOCTITE® ECCOBOND EN UV9700

  • Manufacturer: Henkel

  • Technologies: Acrylate

  • Color: Translucent light blue, fluorescent

  • Cure Type: Ultraviolet (UV) / Moisture

  • Package Size: Contact to Techniq VN for details.

  • Shelf Life: 180 days

1. Product Overview

LOCTITE® ECCOBOND EN UV9700 is a one-component, translucent light blue acrylate encapsulant designed for circuit board protection. It combines UV and moisture curing, ensuring thorough cure even in shadowed areas. The product dispenses easily without stringing and is fluorescent under UV light, enabling efficient inspection. With strong adhesion, flexibility, and progressive hardening through moisture exposure, it offers reliable performance in demanding electronic applications.


2. Applications

  • Local circuit board protection.

  • Bonding and encapsulating PCB components.

  • Encapsulation where shadowed areas require secondary moisture cure.

  • Electronics requiring fluorescent inspection and robust encapsulation.

3. Typical Properties

Property Condition / Substrate Value
Uncured Material
Viscosity 25 °C, @ 2 s⁻¹ 6,745 mPa·s
Viscosity 25 °C, @ 20 s⁻¹ 1,393 mPa·s
Thixotropic Index 2/20 s⁻¹ 4.8
Pot Life 25 °C, syringe in foil 3 days
Shelf Life 2–8 °C 180 days
Curing Performance
Light Source 365 nm LED lamp 500 mW/cm²
Light Dose 15 sec
Cure Depth Optimum conditions ≥0.2 inch
Moisture Cure Ambient, 50% RH Progressive
Cured Material UV + 7 days moisture cure
Glass Transition Temperature (Tg) TMA 53 °C
CTE Below Tg 83 ppm/°C
CTE Above Tg 185 ppm/°C
Storage Modulus DMA @ 25 °C 2,300 N/mm² (334,000 psi)
Hardness, Shore D After UV cure 65
Hardness, Shore D +1 day moisture cure 70
Hardness, Shore D +3 days moisture cure 75
Hardness, Shore D +7 days moisture cure 80

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