UV-234

I. Basic information

Chemical name

2-[2'-hydroxy-3',5'-bis(-dimethyl benzyl)-phenyl]benzotriazole

CAS Registry Number: 70321-86-7

Moleculr Formula: C30H29N3O

Structural Formula:

Ⅱ. Introduction

UV-234 is a benzotriazole type UV absorber. Characterized by its strong, broad range UV absorption property, UV-234 brings an excellent photostability to polymers against UV light exposure in many ways i. e. retarding color yellowing, preventing embrittlement, maintaining of mechanical properties etc.

UV-234 is particularly effective in styrenic polymers, PVC, unsaturated polyesters polyurethanes, acrylic polymers and polycarbonates.

Ⅲ. Physical properties

1. Molecular Weight: 447.58

2. Appearance: white to yellowish crystal powder

3. Melting Point: ≥139.5-141°C

4. Content: ≥99% (HPLC)

5. Transmittance: 460nm≥97% 500nm≥98%

IV. Advantage

1. Odorless,does not bring smells to the polymers.

2. Insensitive to metal ion

3. Non-flammable, non-explosive, non-toxic, harmless to health.

4. Very high photo stability for its strong ability to absorb light especially in UV region (270-400nm).

5. Very stable to heat, and can be used in plastic, which require high processing temperature.

6. Hardly absorbing visible light, especially suitable for the colorless and the light-colored products.

V. Applications(based on polymer weight)

1. Styrenic polymers: 0.2-0.5wt% for PS

0.3-0.5wt% for ABS

0.5-2.0wt% for HIPS

2. Polyvinyl chloride: 0.2-0.5wt% for PVC

3. Polyurethane: 0.3-1.0wt% for PS

4. polyacrylate: 0.15-0.3wt% for PS

5. polycarbonate: 0.15-0.3wt% for PS

6. Unsaturated Polyester: 0.2-0.4wt% for PS

VI. Toxicity & Safety

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