ACHEMA2009 - Paint products: Accelerated stability and quality testing by direct measurement of separation and segregation

Paper at

ACHEMA 2009
29th International Exhibition-Congress on Chemical Engineering, Environmental Protection and Biotechnology
11 - 15 May 2009 Frankfurt am Main / Germany

T. Sobisch, D. Lerche, LUM Berlin/Germany

Paper 7401, 05/11/09 4 p.m.

Paint products: Accelerated stability and quality testing by direct measurement of separation and segregation

To assure continued consumer satisfaction the following stability issues of paint products have to be minimized or avoided:

• Syneresis – separation of the liquid dispersion media
• Pigment segregation – change of colour composition inside a container
• Particle segregation – change of particle size distribution inside a container

These stability issues have to be addressed not only during development of new paint products but also for quality assurance during production on a regular basis. This paper demonstrates that multisample analytical centrifugation can be used as an efficient tool for the accelerated evaluation of separation stability of paint products.
In addition this technique provides for high resolution data of particle size distributions of pigments or emulsions.