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Chemical name

2-(2'-hydroxy-5'-tert-octyllphenyl)benzotriazole

CAS NO.

3147-75-9

 

Introduction

UV-329 is a benzotriazole type UV absorber. Characterized by its high solubility and superior properties makes UV-329 particularly suitable for light stabilizing in coatings, propylene, polyurethane and polyvinyl chloride.

UV-329 is also effective to the light stabilization of unsaturated polyester, polyacrylate and polycarbonate.

 

Physical properties

Appearance: white powder

Melting Point: 101-106 ?

Assay: 99% min.(HPLC)

Transmittance: 460nm: 97% min

500nm: 98% min

Ash content: 0.1% man

 

 

Advantage

• Readily soluble in a wide range of organic solvents.

• Excellent compatibility with variety of the polymers.

• Low volatility during high processing temperature.

• Good extraction resistance.

• Low vapor pressure, very little or no loss during processing.

 

Applications

• Coatings: 1.0-3.0wt% based on solids.

• Polyvinyl chloride: 0.2-0.5wt% for rigid PVC based on solids.

• Polyurethane: 0.3-1.0wt% for PS based on solids.

• Polyacrylate: 0.15-0.3wt% for PS based on solids.

• Polycarbonate: 0.15-0.3wt% for PS based on solids.

• Unsturated Polyester: 0.2-0.4wt% for PS based on solids.

 

Toxicity & Safety

 

UV-329 can be safely handled without irritation caused to the skin.

 

Package

 

In 25 kg carton drum with inner plastic bag.

 

Storage

 

In a closed system and dry , dark place without any light exposure.

 

UV ABSORBER: UV-329,UV-5411

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