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Structure recovery, surface levelling and flow behaviour of coatings

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By Anton Paar Ltd on 12th July 201615th July 2016

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Download document:

Coatings_structure_recovery - .PDF file.

The quality of a coating is directly related to its time-dependent rheological behaviour, which can be measured by means of a three-interval thixotropy test (3ITT).

Structure recovery, surface leveling and flow behaviour are key quality characteristics of coatings. These processes are referred to as ‘thixotropic behaviour’ and are largely responsible for whether a product is positively or negatively judged by the user. The thixotropic behaviour of coatings cannot be determined with flow curves generated with spindle or cylinder systems or with flow viscosities measured with flow cups (DIN EN ISO 2431).

A suitable test for the direct measurement of the structure recovery of a coating following shear stress is the three-interval thixotropy test (3ITT). The experimental set-up closely simulates the application process, with three measuring periods that simulate the behaviour of paints at rest, their behaviour during the application, and the structural recovery after application.

Download the application report available from Anton Paar to see how measurements with a rotational rheometer are used to determine the thixotropic behaviour of coatings for quality control.

Anton Paar Ltd

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

Contact Supplier Visit our website +44 (0) 1992 514 730

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

It is the world leader in the measurement of density, concentration and CO2 and in the field of Rheometry. Other areas of specialty are: Viscometry, Polarimetry, Refractometry, Microwave Sample Preparation & Synthesis, Chemical and Mechanical Surface and Nanostructure Analysis.

With over 2200 employees at the headquarters in Graz (Austria) and the 25 sales subsidiaries worldwide, Anton Paar ensure that their products live up to their excellent reputation. The core competence of the company – high-precision production – and close contact to the scientific community form the basis for the quality of Anton Paar’s instruments.

A strong sales network in more than 110 countries guarantees customers rapid support and answers to their application and service queries.

Innovation is the basis for progress and every year Anton Paar invests more than 20 percent of the annual turnover in R&D.

Anton Paar Limited, a subsidiary of Anton Paar GmbH, provides sales, application support and service to users across the UK and Ireland.

With an office in St Albans (UK) and Dublin (Ireland) and a team of over 30 dedicated employees, Anton Paar Limited aims to provide first-class service at every stage in the customer relationship, ensuring our products live up to their excellent reputation.

Anton Paar Ltd
Unit F, The Courtyard
St Albans
AL4 0LA
UK

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