LOCTITE AA 3751
Harmonization Code : 3909.20.00.90 | Amino-resins, phenolic resins and polyurethanes, in primary forms : Melamine resins : Other
Main features
- Solvent-Free 100% Solids
- 10-Second UV Fixture
- Multi-Function UV Processing
Product Description
LOCTITE AA 3751 is a one-part, solvent-free modified acrylic ester adhesive for UV-light tacking, bonding, coating, encapsulating and sealing. The transparent amber-to-yellow liquid is 100% non-volatile and has medium, shear-dependent Brookfield viscosity for controlled dispensing and coverage. Under the stated UV conditions, fixture develops in 10 seconds or less on glass slides. Cured films reach Shore D 73 hardness and 50% elongation at break. This combination supports assembly processes that use one UV-curing material for bonding, coating, encapsulation and sealing.
Key features
- Solvent-free formulation: The one-part material is 100% solids with no mixing required.
- Fast UV fixture: Fixture develops in 10 seconds or less on glass slides at 6 mW/cm^2 and 365 nm.
- Multi-function application: One grade supports tacking, bonding, coating, encapsulating and sealing.
Applications
Applications include UV-light tacking, bonding, coating, encapsulating and sealing.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Electrical Properties
Physical Properties
Additional Information
As-supplied properties
Typical uncured-product values at 25 deg C unless otherwise stated.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Transparent amber to yellow liquid | Uncured | |
| Solids / non-volatile content | 100 | % | As supplied |
| Viscosity | 8,000 to 15,000 | mPa s | Brookfield RVT, spindle 4, 2.5 rpm, 25 deg C |
| Viscosity | 3,600 to 7,000 | mPa s | Brookfield RVT, spindle 4, 20 rpm, 25 deg C |
Final-state properties
Typical cured-film values for 0.6 to 0.8 mm films cured at 30 mW/cm^2 and 365 nm for 2 minutes per side using a Zeta 7400 source, unless otherwise stated.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 73 | Durometer D | ISO 868 |
| Elongation at break | 50 | % | ISO 527-3 |
| Tensile strength at yield | 22.7 | N/mm^2 | ISO 527-3 |
| Tensile strength at break | 11 | N/mm^2 | ISO 527-3 |
| Tensile modulus | 634 | N/mm^2 | ISO 527-3 |
| UV depth of cure | 3.5 | mm | 25 mW/cm^2 at 365 nm for 10 seconds, Zeta 7400 |
| Lap shear strength | 4.8 | N/mm^2 | ISO 4587, polycarbonate to polycarbonate; substrate failure |
