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Hernon ReAct® 766 is a tough acrylic adhesive designed primarily for bonding permanent magnets. ReAct® 766 has also found wide acceptance in a variety of structural bonding applications due to its versatile performance capabilities. ReAct® 766 provides high tensile strength while maintaining excellent product flexibility. This results in tough durable bonds with outstanding impact and pee1 resistance. Temperature resistance from –40ºC (-40ºF) to 204ºC (400ºF). ReAct® 766 is a single component adhesive used in combination with Hernon® Activator 59 or Activator 63 for curing at room temperature. The adhesive may also be heat cured at 150ºC.

Product Type: 1K (1 component) Adhesive, Structural Adhesive

Compatible Substrates & Surfaces: Aluminum, Metal, Steel

Cure Method: Air Dry, Heat Cure

Chemical Family: Acrylics, Acrylates & Methacrylates

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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Product Benefits
  • High impact and shock resistance.
  • Good gap filling capabilities.
  • High temperature resistance.
  • Excellent adhesion to a variety of surfaces.
  • Consistent rate of cure in 60º to 100ºF.
  • Consistent bond strength.
  • Eliminates need for mechanical clips.
  • Requires minimal clamping time.
  • Room temperature cure, eliminates high cost of energy needed for heat cured material.

Applications & Uses

Compatible Substrates & Surfaces
Directions for Use
  1. For best performance bond surfaces should be clean and free from grease.
  2. Activator 59 or 63 should be applied to one of the bond surfaces and the adhesive to the other surface. Parts should be assembled within two hours. Minimizing the on-part time of the activator maximizes the consistency of performance.
  3. Where bond gaps are large (up to a maximum of 0.5 mm), or faster cure speed is required, Activator 59 or 63 should be applied to both surfaces. Parts should be assembled immediately.
  4. Excess adhesive can be wiped away with organic solvent.
  5. Bond should be held clamped until adhesive has fixtured.
  6. Product should be allowed to develop full strength before subjecting to any service loads (typically 24 to 72 hours after assembly, depending on bond gap, materials and ambient conditions).

Properties

Typical Curing Performance

ReAct® 766 is designed to be used with Activator 59 or 63 and cured at room temperature. Cure characteristics are measured by determining fixture time (handling time) and speed of cure.

Fixture Time

Fixture time is defined as the time to develop a shear strength of 0.1 N/mm². Tested on steel lap-shear specimens, 1 side primed with a minimal thin layer of Activator 63.

Substrate Fixture Time, minutes
AR Aluminum 2 to 5
Typical Cured Performance

Tested on lap-shear specimens in accordance with ASTM D1002. Cured for 24 hours at room temperature. One side primed with a minimal thin layer of Activator 63.

Substrate

Shear Strength, N/mm² (psi)

G/B Steel 1500 - 2500
G/B Aluminum 1500 - 2500

Shear Strength was measured using GB Steel. Tested at RT, ASTM D1002.

Cure Type Cure Shear Strength, N/mm² (psi)
Heat Cure 30 minutes, at 150ºC ≥ 24.1 (≥ 3500)

 

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

General Information

This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.
For safe handling information on this product, consult the Safety Data Sheet (SDS). Where aqueous washing systems are used to clean the surfaces before bonding, it is important to check for compatibility of the washing solution with the adhesive. In some case, these aqueous washes can affect the cure and performance of the adhesive. This product is not normally recommended for use on plastics (particularly thermoplastic materials where stress cracking of the plastic could result). Users are recommended to confirm compatibility of the product with such substrates.

Storage & Handling

Storage

ReAct® 766 should be stored in a cool, dry location in unopened containers at a temperature between 45ºF to 85ºF (7ºC to 29ºC) unless otherwise labeled. Optimal storage is at the lower half of this temperature range. To prevent contamination of unused material, do not return any material to its original container.