Canadian Finishing and Coatings Manufacturing


November 8, 2022


Evonik ProductEvonik's Coating Additives business line has added a new deaerator to its portfolio. Specially designed for radiation cured wood coatings the new deaerator, TEGO Airex 923, is a highly compatible 100 per cent active organic polymer that shows improved efficiency.

UV-curable coatings have many advantages: They are environmentally friendly, nearly universally applicable and have a very fast, efficient, and productive application process. However, this kind of coating system also has foaming issues. Depending on the specific formulation characteristics and the choice of application conditions, Evonik offer defoamers and deaerators with a variety of application profiles. With TEGO Airex 923, Evonik is adding an effective deaerator for radiation-curing of wood and furniture coatings.

Near universal application

TEGO Airex 923 breaks down foam fast and efficiently preventing air inclusions and pinholes to form. This is particularly important in high viscosity, or high solids formulations where the concentrate provides outstanding compatibility. It can be used with multiple types of binders and many different ingredients. The polymer character and good compatibility of the product leads to excellent re-coatability and makes TEGO Airex 923 suitable even for clear coats with highest demands on optical appearance.

Easy to use

Foam in wood coatings can result in a loss in transparency and protection, and can also negatively impact overall optical appearance, haptic, and even production efficiency. TEGO Airex 923 solves these issues and is highly user friendly. The deaerator exhibits good flow behavior, making it easy to handle. Furthermore, it can be stored for a longer period of time and shows similarly high performance afterwards.

CFCM GFSSurvey 400

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New Bacharach Sling Psychrometer

CFCM slingpsychrometer 400Paul N. Gardner USA, global distributors, producers, and designers of quality physical and inspection instruments for the paint, coatings, and related industries, has introduced a new offering: The compact, portable Sling Psychrometer.

As an easy way to measure relative humidity levels quickly, this uniquely compact Bacharach Sling Psychrometer accurately determines per cent relative humidity without the necessity of consulting complex tables. There is no need to wet the wick each time a reading is taken, and it contains a slide rule calculator which correlates wet and dry bulb thermometer indications for direct reading of relative humidity. When not in use, the thermometer case telescopes into the handle for protection.

The Sling Psychrometer consists of two thermometers that are turned by vigorously swinging the handle and exposing the thermometers to rapid air movement. These two thermometers are called dry bulb and wet bulb. The bulb of one thermometer is placed in direct contact with the room air to measure dry-bulb air temperature. The bulb of the other thermometer is covered with a silk or muslin sleeve that is kept moist to record the wet bulb temperature. Evaporation cools the wet bulb more than the dry bulb, and the humidity is obtained as a function of change in temperature. The atmospheric humidity is determined by calculations, steam tables, or using a psychrometric chart.  

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