Applications

Araldite® 70 – vinyl-phenolic primer and adhesive for brake and clutch bonding on steel and friction linings.

  • 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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