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Benzotriazole Based Ultraviolet Absorbers

PowerSorb™ 234

2-[2-hydroxy-3,5-di-(1,1-dimethylbenzyl)]-2H-benzotriazole.
Synonym:2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl) phenol
Chemical Structure
Introduction / Features
PowerSorb™ 234 is a high molecular weight ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class, imparting excellent light stability to a variety of polymers.
Physical Properties
Chemical Name: 2-[2-hydroxy-3,5-di-(1,1-dimethylbenzyl)]-2H-benzotriazole
CAS No.: 70321-86-7
EINECS No.: 274-570-6
Formula: C30H29N3O
Molecular Weight: 448
Specific Gravity[20°C]: 1.22g/cm3
Melting Range: 138-142°C
Volatile Loss(%): Max.0.3
Color of Solution 460nm (%): Min.97
Color of solution 500nm (%): Min.98
Vapor Pressure 20°C: ~2-10Pa
Appearance: Off-white Powder
Ash (%): Max.0.05
Min. Purity: 99%

Solubility (20°C) % w/w
Benzene: 10
Acetone: 2
Ethyl acetate: 4
Chloroform: 35
n-Hexane: 0.6
Methanol: <0.1
Cyclohexane: 5
Ethanol: 0.3
Dichloromethane: 34
MEK: 13
Butylcarbitol 0.2
Butanol: 0.3
Butylacetate: 4.5
ethylglycol: 1
xylene: 10
Toluene: 20
Water: <0.01

Applications
PowerSorb™ 234 is highly effective for polymers processed at high temperatures such as polycarbonates, polyalkylene terephthalates, polyacetals, polyamides, polyphenylene sulfide, polyphenylene oxide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers, as well as for polyvinylchloride, styrene homo- and copolymers. Applications include molded articles, films, sheets and fibers.
Packings
PowerSorb™ 234 is supplied in 25kg cartons or drums.
Technical Library
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