ARADUR® 422 XW 70

Polyamidoamine adducts provide the following advantages in comparison with poly- amidoamine hardeners because of their anticipated pre-reaction, due to the standardized addition of the hardener along with a part of the required epoxy resin:

• Improved resistance to atmospheric humidity and cold
• Reduced surface tackiness
• Improved flow properties
• A reduction in the time required, as no pre-reaction is necessary.

ARADUR® 422 XW 70 is suitable for use at up to 70 % relative atmospheric humidity. As the mix ratio of ARADUR® 422 XW 70 corresponds with that for Aradur 115 X 70, ARADUR® 422 XW 70 can be used in place of Aradur 115 X 70 without change to the existing recipe. Reactivity increases throughout the ARADUR® 422 XW 70, 423 XW 60 and 424 XW 50 hardeners.

Along with liquid or (preferably) solid epoxy resins or their solutions such as Araldite GZ 7071 X 75, ARADUR® 422 XW 70 is suitable for the formulation of cold-curing, solvent- containing coatings for application on steel and mineral substrates. Main applications in ship- building, anti-corrosion protection and the construction industry.

• The mix ratio of Araldite GZ 7071 X 75 to ARADUR® 422 XW 70 should be selected as 100:53 parts by weight.
• Deviations from this of up to 15 % are acceptable. In such cases a higher proportion of hardener provides increased flexibility and adhesion, while improved chemical resistance is achieved with a reduced proportion of hardener.

• ARADUR® 422 XW 70 should be stored in a dry place, preferably in the sealed original container, at temperatures between 2 and 40 °C. The product should not be stored exposed to direct sunlight.
• Sometimes it happens that the typical yellow to brownish color of the hardener ARADUR® 422 XW 70 shows a somehow greenish effect.

Mandatory and recommended industrial hygiene procedures should be followed whenever our products are being handled and processed.