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Tuesday, 26 March 2019
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Raw materials & technologies, Production and testing

European Coatings LIVE! speaker answered questions

Wednesday, 20 November 2013

Sowmitri Tarimala of Ashland Specialty Ingredients discussed image analysis for assessing new foam control agents in waterborne coatings.

The latest European Coatings LIVE! focused on measuring and testing
Source: Alterfalter - Fotolia.com

The latest European Coatings LIVE! focused on measuring and testing
Source: Alterfalter - Fotolia.com

At the latest European Coatings LIVE, the new monthly web event of the European Coatings Journal (ECJ), Sowmitri Tarimala of Ashland Specialty Ingredients presented a detailed paper on "Quantitative performance assessment of new foam control agents in waterborne coatings”. We present his answers to the questions he received from the audience after his presentation.

Q: Apart from doing tests with the described automated high-throughput technology, would you recommend to additionally do a "subjective” testing?

A: I would like to clarify that the method presented can be automated but is not a high through put technology. If there are a large number of samples (>20) to be screened, a "subjective” test is recommended to narrow down the selection and then perform the quantitative analysis.  

Q: How easy is it to incorporate this tool? What do I have to consider?

A: While there is a learning curve, it is relatively easy to deploy the hardware and software. Critical considerations are imaging setup (suitable hardware with sufficient resolution / magnification  for imaging objects of interest) and lighting conditions (to get good quality images).

Q: Is it efficient also for smaller companies to install this technology?

A: Yes, depending on the choices of imaging set-up and the software used to analyse the images, it can be relatively inexpensive and efficient to deploy.  

Q: Can it only be used for waterborne coatings?

A: This method of imaging and analysing surface defects in a coating film can be extended beyond waterborne coatings. Any defects in a coating film (clear coats, automotive, etc) that can be sufficiently distinguished in a film can be quantified.

Q: What other foam control agents can be used apart from the ones mentioned in your paper?

A: The choice of foam control agents depends on the application and the targeted paint system. The foam control agents used in this paper are typical technologies encountered in waterborne coatings - mineral oil based and siloxane polymer based technologies. Other examples that can be used are silicone free foam control agents or molecular defoamers - which deliver difference performance attributes.

Download the presentation

In order to download Sowmitri’s presentation, please register and log in at http://www.european-coatings.com/Publications/EC-LIVE. You need to agree to the Privacy Policy, then click "To EC LIVE”. In the auditorium, click the "X” on the top right to access the Media Center, where you can download the presentation slides and further interesting material related to the topic.

The next European Coatings LIVE will take place on 17 December, 2013 at 15.00 h (CET). Kevin Biller, Powder Coating Research Group, author of  the main technical article in the December issue of ECJ, will provide additional information and data to his publication on powder coatings. The audience can interact by posing questions during and after the presentation.

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