Item Name: Araldite® 70
Manufacturer: Huntsman Advanced Materials
Technologies: Vinyl-modified phenolic resin adhesive/primer (formerly Redux 70)
Color: Dark brown/black when cured (clear brown liquid before curing)
Cure Type: Solvent evaporation and thermal cure (150–230 °C)
Package Size: Contact to Techniq VN for details.
Shelf Life: 18 months
1. Product Overview
Araldite® 70 is a vinyl-phenolic based adhesive and surface primer, formerly known as Redux 70. It is a solution of vinyl-modified phenolic resin, designed for brake and clutch bonding. It acts both as a primer for metals (especially steel) and as a friction lining adhesive. When cured, it appears dark brown to black. It is specifically recommended for use with Araldite® 64-1 and Araldite® 71.
2. Applications
Primer for metals, particularly steel, in brake and clutch bonding.
Adhesive for friction lining materials (asbestos-based and non-asbestos).
Applied by brushing, spraying, roller coating, or dip coating.
Suitable for corrosion protection when used as dip coat on metals.
Compatible with thermal curing between 150–230 °C under pressure.
3. Typical Properties
| Property | Typical Data |
|---|---|
| Uncured (before mixing/curing) | |
| Appearance | Clear brown liquid |
| Viscosity at 25 °C | 500 – 800 mPa·s |
| Solids Content | 38 – 44% |
| Primary Solvent | Ethanol |
| Specific Gravity | ~0.99 |
| Flash Point | ~18 °C |
| Shelf Life (6–28 °C, unopened) | 18 months |
| Cured Properties (after curing) | |
| Shear test (friction lining, 20 °C) | >4.5 MPa |
| Shear test (friction lining, 200 °C) | 1.6 – 4.5 MPa (depending on material) |
| Steel/steel lap shear with Araldite® 71 (23 °C) | >7.5 MPa |
| Steel/steel lap shear with Araldite® 71 (200 °C) | >4.5 MPa |
| Cured appearance | Dark brown/black |
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