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| BLS 1328 |
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| 2-(2¡¯-Hydroxy-3¡¯, 5¡¯-di-tert-amylphenyl) benzotriazole |
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| 25973-55-1 |
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BLS 1328 is a benzotriazole type UV absorber.
High solubility and superior properties make BLS 1328 particularly suitable for light stabilizing in coatings, propylene, polyurethane and polyvinyl chloride.
BLS 1328 is also efficient for the light stabilization of unsaturated polyester, polyacrylate and polycarbonate.
General Purpose coatings.
BLS 1328 is highly recommended for protective coatings.
It does not cause "yellowing", is unaffected by practical baking requirements and has excellent UV absorbing characteristics.
BLS 1328 provides excellent protection in a variety of automotive coating substrates: two component polyurethanes and thermoset acrylic enamels.
BLS 1328 has excellent solubility in urethane solvents, is non-reactive and has no effect on the cured properties of the coating while protecting against loss of gloss.
In thermoset acrylic enamels the low volatility and high solubility of BLS 1328 make it especially attractive in thermosetting acrylic finishes.
BLS 1328 protects against loss of gloss and is useful in thermosetting acrylic clear top coats where it protects against interfacial adhesive loss between the top coat and the base coat.
BLS 1328 is generally superior to other ultraviolet light absorbers in terms of retaining color after light exposure, especially when used in combination with BNX 1010.
BLS 1328 is a successful UV absorber in the following applications:
polypropylene, rigid and flexible polyvinyl chloride, unsaturated polyester, polycarbonate, polyacrylate, ABS, epoxy, acrylic, polystyrene, polyethylene, polypropylene, and polyacetal. |
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Appearance: Off White Powder
Molecular Weight: 351.5
Melting Range: 80-88'C
Flashpoint (Ignition): 390'C BAM
Percent Volatile: < 0.5%
Color of Toluene Solution : Clear
Transmittance (5 g/100ml Toluene) 460 NM>= 94%: 500 NM >= 97%
Specific Gravity: ~ 1.17 (H20 = 1)
Vapor Pressure: 4.7 X 10(-6) mm Hg at 20'C.
Decomposition Temperature: > 220'C |
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