Stabilizer blends typically appear as white to yellowish powders or liquids, formulated combinations of various stabilizing agents. They protect the resin and pigment system from degradation caused by factors like UV radiation, heat, or oxidation, thereby extending the coating's lifespan and maintaining its appearance. Key features include synergistic protective effects, broad-spectrum UV absorption, and effective radical scavenging to prevent yellowing, chalking, and gloss loss. They are highly suitable for exterior architectural coatings, automotive topcoats, and clearcoats, where long-term durability and color retention in harsh outdoor environments are essential.
A strong trend in stabilizer blends is the development of more sustainable, non-migrating, and highly efficient systems that can offer robust protection at lower concentrations. Sub-types typically combine UV absorbers (e.g., benzotriazoles, triazines) with hindered amine light stabilizers (HALS) and sometimes antioxidants (e.g., phosphites, phenolics) to provide multi-layered protection.
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SpeedBlock UV-92 by Lambson (Sartomer) is a blend of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and methyl(1,2,2,6,6-penta-4-piperidyl) sebacate. Acts as a sterically hindered amines (HALS) UV absorber. Exhibits excellent light stability and provides UV protection. It is highly compatible with many formulations and also works synergistically in combination with other UV absorbers. SpeedBlock UV-92 is suitable for exterior surface industrial and automotive (non-acid catalysed) coatings, metal coatings and wood coatings. Recommended concentrations for clear and solid coats (one coat) is 0.5-2% (as a % of binder solids).
CHEMK UV-5050 by Jiangsu Chemk is a liquid light stabilizer blend. It offers high thermal stability and permanence, making it suitable for coatings exposed to high bake temperatures and extreme environmental conditions. It is designed to meet high durability and cost/performance demands in trade sales and industrial coating applications. Its broad UV absorbance enables effective protection of light-sensitive substrates such as wood and plastics. <br>
<ul style="padding-left: 40px;"> <li>Versatile for both clear and pigmented coatings based on waterborne or solvent-borne paint technologies. </li>
<li>Recommended for house and trim paints, industrial stoving finishes (alkyd, PES/melamine, or PES/NCO systems), wood coatings, especially waterborne acrylic dispersion systems, one-component or two-component polyurethane coatings.</li>
<li>The dispersion in waterborne coatings can be improved by using water-miscible co-solvents such as butyldiglycol or Texanol. </li> </ul>
SONGSORB® CS B5459 by Songwon is a liquid, viscous light stabilizer blend of a formamidine UV absorber (UVA) with a hindered amine light stabilizer (HALS). It is suitable for solvent-borne and solvent-free coatings. It is used in industrial applications. It is used for general and white/bright pigmented epoxy systems. SONGSORB® CS B5459 offers highly convenient processing and also boosts the performance of the current systems.
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