Black UV Cure Adhesive 3702 High OD Light Blocking 2500 mPa.s Reworkable 73D for Sensor LED Modules

Black UV Cure Adhesive 3702 - High OD Light-Blocking Adhesive

3702 is a black, UV-curable light-blocking adhesive engineered for electronic components that demand reliable optical shielding and robust protection. It combines excellent surface cure and deep cure performance with high hardness, high toughness and reworkability, delivering consistent, controllable results in automated production lines.

Key Features

• Excellent surface and deep curing - fast, thorough cure under standard UV sources.
• High hardness with high toughness - 73D Shore hardness with 150% elongation at break, impact resistant yet flexible.
• Reworkable - allows repair and rework without damaging sensitive components.
• High OD value light blocking - black formulation provides superior optical shielding.
• Low water vapor transmission, boil resistant - strong moisture barrier for demanding environments.
• Excellent temperature and aging resistance - stable performance across high and low temperature cycling.

Applications

• Light blocking and sealing of optical sensors and photoelectric switches.
• LED module encapsulation and edge sealing to prevent light leakage.
• PCB board protection, dam and fill of sensitive electronic components.
• Camera module and optical component light shielding.
• UV-cured bonding of glass, metal and plastic parts in electronic devices.
• Automotive electronics and outdoor lighting fixtures requiring moisture and temperature resistance.

Technical Datasheet

FAQ

Q1: What UV energy does 3702 need to cure fully?
3702 requires a curing energy of 2500 mJ/cm2. It features excellent surface cure and deep cure performance, ensuring thorough cross-linking even in shadowed or thick-section areas.

Q2: Why choose a black light-blocking adhesive?
The black formulation of 3702 delivers a high OD value that effectively blocks stray light, making it ideal for optical sensors, camera modules and LED devices where light leakage must be eliminated.

Q3: Can 3702 be reworked after curing?
Yes. 3702 combines high hardness (73D) with high toughness and is designed to be reworkable, so components can be repaired or repositioned without damaging the substrate.

Q4: How does 3702 perform in humid or high-temperature environments?
3702 has a low water vapor transmission rate and is boil resistant. It also withstands high and low temperature cycling and aging, providing long-term reliability in demanding applications.

Q5: What is the shelf life and how should 3702 be stored?
3702 has a shelf life of 12 months when stored in its original sealed container at 8-28C, away from direct sunlight and UV light sources.

Q6: What packaging sizes are available?
3702 is available in 30g, 50g and 1kg packages to suit manual dispensing, semi-automatic and fully automated production lines.