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Chemical
name
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2-(2'-Hydroxy-3’,5'-di-(a,a-dimethyl
benyl) phenyl) benzotriazole
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CAS
NO.
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70321-86-7
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M.W.
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447.6
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Introduction
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Sunvin 23 is a high molecular weight UV absorber of the hydroxypheny
benzotriazole class, showing outstanding light stability to a variety of
polymers during its use.
Sunvin 23 features low volatility, exceptional light absorbing
characteristic and good compatibility in various substrates.
Sunvin 23 is suitable for high surface area products, like film etc.
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Physical
properties
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1. Appearance: slightly yellowish crystal powder
2. M. P.: 137-141℃
3. Assay: 99% min.
4. Transmittance: 460nm: 97%min.
500nm:
98%min.
5. Ash content: 0.30% max.
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Advantage
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1.
Readily soluble in a wide
range of organic solvents.
2.
Excellent compatibility
with variety of the polymers.
3.
Low volatility during high
processing temperature.
4.
Good extraction resistance.
5.
Low vapor pressure,
very little or no loss during processing.
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Applications
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1.
Polyvinyl chloride:
0.2-0.5wt% for rigid PVC based on solids.
2.
Polyurethane: 0.3-1.0wt% for PU based on solids.
3.
Polyacrylate: 0.15-0.3wt% for PS based on solids.
4.
Polycarbonate: 0.15-0.3wt%
for PP based on solids.
5.
Polyester: 0.2-0.4wt% for
PET based on solids.
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Toxicity
& Safety
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Sunvin 23 can be safely handled without irritation caused to the skin.
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Package
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In 25 kg paper drum with inner plastic
bag.
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Storage
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In a closed system and dry, dark place
without any light exposure.
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