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Friday, 20 September 2019
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Raw materials & technologies, Raw materials, Coatings pigments

Characterising dioxazine pigment-based monodispersed masterbatches

Friday, 28 November 2014

A dioxazine-based colour pigment was added to a commercial polyamide 6 (PA6) through an extrusion process, in order to prepare monoconcentrated violet masterbatches through different production set-up.

A characterisation of the resulting materials was carried out in order to find the best processing parameters to optimise pigment dispersion. Source: VDMI
A characterisation of the resulting materials was carried out in order to find the best processing parameters to optimise pigment dispersion. Sourc...

A detailed characterisation of the resulting materials was carried out in order to find the best processing parameters combination to optimise pigment dispersion and to reduce the clogging power.

Increasing the quality of the final product

The preparation of masterbatches with repeated extrusions markedly reduced the filter pressure value and increased the relative colour Strength, while filtration did not significantly influence pigment dispersion. Rheological measurements and end-groups analysis were conducted on the same materials with the aim to evaluate their thermal degradation resistance, and the thermal stability of the compounds was retained even upon three extrusions. Therefore, it can be concluded that a proper optimisation of the process parameters could lead to an important reduction of the production waste, increasing the quality of the final product.

The study is published in: Journal of Applied Polymer Science, Volume 132, Issue 7, February 15, 2015.

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