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Article: Advancements in novel encapsulated lights stabilizers for waterborne coatings.
- Article from:
- Paint & Coatings Industry
- Article date:
- August 1, 2008
- Author:
CopyrightCOPYRIGHT 2008 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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The exterior durability of most organic coatings is highly dependent upon the use of light stabilizers. The two main stabilizer categories are ultraviolet light absorbers (UVAs) and hindered amine light stabilizers (HALS). UVA chemical classes include benzophenones, cyanoacrylates, oxanilides, benzotriazoles and triazines. Today, the latter two of these classes are by far the most commercially significant to the coatings industry due to their excellent spectral coverage, high extinction coefficients and excellent photo-permanence. HALS fit into a broader chemical family known as antioxidants but are distinguished from other materials of that class such as phosphites, ...