PowerSorb™ 234,2-[2-hydroxy-3,5-di-(1,1-dimethylbenzyl)]-2H-benzotriazole,CAS No.70321-86-7



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	Antioxidant \| Ultraviolet Absorber \| Light Stabilizer \| Photoinitiator

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:	C`30`H`29`N`3`O
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.

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