CRAYVALLAC® EXTRA

Key Benefits:

• Formulation:

  • Easy handling

• Storage:

  • Antisettling

  • In-can appearance

  • Syneresis resistance

  • Viscosity stability

• Application:

  • Edge-coverage

  • Sag resistance

  • Sprayability

• Film Properties:

  • Anticorrosion

  • Gloss

  • Levelling

• Safer Solutions:

  • APEO Free

  • Heavy Metal Free

  • Solvent Free

• Total Bio Content (%): 90

Thickening Mechanism:

• Non Associative

Viscosity Contribution:

• Low Shear contribution

• Mid Shear contribution

• CRAYVALLAC® EXTRA is best added along with the initial charge of resin during the pigment dispersion and grind stage.
• Efficient activation will be achieved by allowing the temperature during this dispersion process to rise to 45 - 65°C (113 - 149°F), but more preferably from 55 - 65°C (131 - 149°F).
• This condition of dispersion and temperature control should be maintained for 20 - 30 minutes to ensure full activation.
• The activation process constitutes the conversion of the CRAYVALLAC® EXTRA particles to an interacting network of crystalline fibres.
• It is this network that gives rise to the final coating’s shear thinning rheology.
• This shear thinning characteristic provides a very high viscosity under the low shear rates associated with sedimentation, and a low viscosity at the much higher application shear rates. The net result is excellent control of sedimentation combined with ease of application.
• Immediately following application, where low shear conditions again predominate, the coating’s viscosity undergoes a time dependent recovery as the network re-establishes itself.
• This time dependence is known as thixotropy and enables the final coating to attain very good levelling and sag resistance.

• It should be stored in the original containers in a dry place at temperatures between 5°C (41°F) and 30°C (86°F).
• Avoid exposure to direct sunlight or frost.
• In these conditions, this product should be used within 48 months from production.