Water-based coatings for wood coatings to meet strict air pollution regulations

People want to lead healthy lifestyles. Breathing clean air is essential to this end. This is why China is implementing strict air quality regulations in the years to come. Radically tighter air pollution restrictions – which forces companies to use only water-based formulations from 2018 onwards – are expected from Beijing. The future-proof Picassian® AC-188 is a fine example of such a water-based solution. Combined with polycarbodiimides, Picassian® AC-188 results in a high-performance coating with outstanding chemical resistance, suitable for wood applications for home furnishings. Stahl Polymers’ 2K method tackles frequent limitations in performance while replacing solvent-based coatings with water-based coatings. Bill Cai, Business Manager of Stahl Polymers China, explains.

“With the development of Picassian® AC-188 we have succeeded in combining multifunctional polycarbodiimides with a water-based acrylic emulsion for the first time,” Bill elaborates. “In 2016 we introduced the combination of Picassian® AC-188 (acrylic emulsion) and Picassian® XL-701 (polycarbodiimides) to the Chinese market for home furnishings. It was very well received by various clients, and has great potential in line with and beyond expected legislation in Northern China. One of the biggest advantages is that, in contrast to other 2K coatings which are difficult to mix, both Picassian® AC-188 and Picassian® XL-701 are easy to formulate.

2K coatings with excellent pot life
In contrast to 1K coatings, 2K coatings need to be mixed with a hardener, catalyst or activator. The reaction makes 2K coatings much less susceptible to damage from chemicals, weather and UV radiation. However, until recently existing water-based 2K coatings were facing problems related to short pot life, mixing difficulties and costs. Stahl Polymers’ unique technology in polycarbodiimide crosslinkers selectively reacts with carboxylic acid (–COOH) groups in polymer chains. This solved the pot life issue as polycarbodiimides are much less sensitive to the presence of water.” 

Flexibility
Due to the high reactivity, curing with polycarbodiimide crosslinkers can be done below room temperature or typical oven conditions used for drying applied coatings. This provides great flexibility to manufacturers of wood furniture like tables, closets and flooring, while already complying with the expected regulations for Beijing and the surrounding area.

Contact details
Please contact Bill Cai to discuss what Stahl’s solutions can offer you. 
Bill Cai, Business Manager
E-mail: Bill.Cai@stahl.com
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