Influence of Hectorite Clay on the Optical Properties of Aqueous Metallic Coatings in a Rheological Context

Time: 16:20 - 16:40

Date: 7 June 2022

Theatre: Seminar Room A

7-june-2022 16:20 7-june-2022 16:40 Europe/London Influence of Hectorite Clay on the Optical Properties of Aqueous Metallic Coatings in a Rheological Context

The orientation of the metal flake pigments, e.g. Aluminum pigments are playing a major role to achieve the optimum optical properties in the formulation of metallic coatings. The orientation and the immobilisation of the effect pigments plays is crucial for achieving optimum effects. This is typically explained because of processes which are running throughout the… Read more »

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The orientation of the metal flake pigments, e.g. Aluminum pigments are playing a major role to achieve the optimum optical properties in the formulation of metallic coatings. The orientation and the immobilisation of the effect pigments plays is crucial for achieving optimum effects. This is typically explained because of processes which are running throughout the drying process of the coating. One of the described effects is of rheological nature and can be massively influenced by the choice of the right combination of rheology modifiers.

The article will show that excellently balanced ratios of Hectorite clay-based rheology modifiers with suitable co-thickeners, mainly ASE, are optimizing the properties of aqueous metallic coatings. These findings will be underlined by rheological findings which can be utilized in order to predict certain optical effects.

  • Highest flop indices in the entire study
  • Optimum metal orientation and optical properties
  • Significantly higher flop values achievable than with synthetic Hectorite clay
  • Excellent humidity resistance also at higher clay loadings

Speakers

  • Udo Schonhoff Technical Sales Manager Coatings EMEA - Elementis GmbH

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