LOCTITE AA A-671
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Fast Room-Temperature Fixture
- High-Strength Magnet Bonding
- External-Mix 1:1 Processing
Product Description
LOCTITE AA A-671 is a two-part toughened structural acrylic adhesive system for permanent magnet bonding in motors, speakers, generators, and related magnetic assemblies. Part A resin and Part B hardener/activator are mixed at a recommended 1:1 ratio, producing a dark-green, thixotropic material that cures at room temperature. Fixture is 75 seconds or less, and lap shear is at least 13.8 N/mm^2 on solvent-cleaned steel after 24 hours at 25 deg C. The system is used for ferrite, AlNiCo, samarium-cobalt, and neodymium magnet assemblies; bond results depend on the surfaces and preparation.
Key features
- Fast room-temperature fixture: Fixture time is 75 seconds maximum under ISO 10964.
- Equal-ratio component mixing: The recommended Part A:Part B ratio is 1:1 for the complete two-component system.
- Magnet-to-steel bonding: Bonds ferrite, AlNiCo, samarium-cobalt, and neodymium magnets to grit-blasted steel.
Applications
Permanent magnet bonding in DC motors, speakers, generators and magnetic assemblies.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Other Properties
Additional Information
As-supplied / before-processing properties
Part A and Part B are listed separately; the page entity is the complete two-part system.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A appearance | Yellow | Resin component | |
| Part B appearance | Blue | Hardener/activator component | |
| Mixed appearance | Dark green | Part A and Part B combined | |
| Recommended mix ratio | 1:1 | Part A:Part B | |
| Part A Brookfield viscosity | 20,000 to 25,000 | mPa s (cP) | 25 deg C; RVF; spindle 6; 20 rpm |
| Part B Brookfield viscosity | 20,000 to 25,000 | mPa s (cP) | 25 deg C; RVF; spindle 6; 20 rpm |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Glass transition temperature | 59 | deg C | Cured material |
| Shore hardness | 60 | Durometer D | ISO 868; 25 deg C |
| Lap shear strength | 13.8 minimum | N/mm^2 | ISO 4587; solvent-cleaned steel; 24 h at 25 deg C |
| Impact strength | 7 | J | ISO 9653; grit-blasted steel; 48 h at 25 deg C |
| Ferrite-to-steel block shear | 12 | N/mm^2 | ISO 13445; grit-blasted steel to ferrite; 48 h at 25 deg C |
