Q1 What is the difference between UV-944 and UV-622?
Ultraviolet Stabilizing Agent UV-944 has higher molecular weight and provides excellent long-term thermal stability. It is ideal for PP, ABS, PE, TPE, PA, and EVA. UV-622 offers better compatibility with PC, TPU, and PU systems. It also works well in engineering plastics and elastomers. Choose UV-944 for general polyolefin applications. Choose UV-622 for polycarbonate and polyurethane systems. (Equivalent Code: Tinuvin 944, Tinuvin 622)
Q2 Which UV stabilizer is best for coating and ink applications?
For paints and inks, UV stabilisation UV-292 and UV-123 are recommended. UV-292 works well with PU, AR, ER, PET, and PAA systems. UV-123 is also suitable for these applications. Both UV light stabilizers provide excellent protection against UV degradation while maintaining optical clarity and color stability. They are commonly used in automotive coatings, industrial paints, and printing inks. (Equivalent Code: Tinuvin 292, Chisorb 292)
Q3 What is the advantage of using blended ultraviole stabilizers like UV-783 or UV-791?
Blended UV stabilizers offer synergistic effects. UV-783 combines UV-944 and UV-622 for broader protection across multiple polymer systems including PP, ABS, TPE, PE, EVA, EPDM, TPU, and PA. UV-791 combines UV-944 and UV-770 for PP, ABS, and PE applications. Blends provide better cost-performance ratios and simplify inventory management for manufacturers. (Equivalent Code: Tinuvin 622, Tinuvin 770)
Q4 What is the typical addition level for UV stabilizers?
Typical addition levels range from 0.2% to 1.0% of total formulation weight. For most polyolefin applications, 0.3% to 0.5% provides adequate protection. For demanding outdoor applications or engineering plastics, higher levels up to 1.0% may be needed. For coating applications, follow specific formulation guidelines. Conduct dosage optimization tests for your specific application.
Q5 Can UV stabilizers be used together with antioxidants?
Yes. Ultraviole stabilizers and antioxidants are often used together for complete protection. They can protect against UV-induced degradation. Antioxidants protect against thermal oxidation during processing. Many formulations combine both types for optimal weatherability and processing stability. iSuoChem® offers both product families for integrated solutions.
Q6 What is the recommended storage condition for UV stabilizers?
Store it in a cool, dry place away from direct sunlight and moisture. Keep containers tightly sealed when not in use. Under proper storage conditions (below 30°C, humidity <60%), shelf life is 24 months from production date. Avoid exposure to strong oxidizers, acids, and excessive heat.
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