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PUREsorb 234 is a high molecular weight ultraviolet light absorber (UVA) of the hydroxy phenylbenzotriazoleclass, imparting outstanding light stability to a variety of polymers.

Functions: UV Absorber

Compatible Polymers & Resins: Polyamides, Polycarbonates (PC), Polyesters, Polyphenylene Ether (PPE), Polyphenylene Sulfide (PPS)

Synonyms: Tinuvin 234, UV-234

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Identification & Functionality

Plastics & Elastomers Functions
CAS No.
70321-86-7
EC No.
274-570-6
Technologies
Chemical Structure

PUREsorb 234 - Chemical Structure

Features & Benefits

Key Attributes

PUREsorb 234 features low volatility, exceptional light absorbing characteristics and good compatibility in various substrates. This makes PUREsorb 234 especially suitable for applications characterizedby high surface area, such as films and fiber. It protects organic polymers as well as pigments from UV light, improving and preserving the technical and visual performance of such applications.

Applications & Uses

Product Applications

PUREsorb 234 areas of application include molded articles, films, sheets and fibers. In addition PUREsorb 234 is highly effective in high temperature processed polymers such as poly-carbonate, polyesters, polyacetal, polyamides, polyphenylene sulfide, polyphenylene oxide, aromaticcopolymers, thermoplastic polyurethane and polyurethane fibers, where loss of UVA is not tolerated as well as for polyvinylchloride, styrene homo-and copolymers.
PUREsorb 234 may be use in range between 0.15 - 0.60%, depending on substrate and performance requirements of the final application. PUREsorb 234 can be used on its own or can be blend with other UVA and stabilizers where often a synergistic performance is observed.

Properties

Color
Physical Form
Appearance
White powder
Typical Properties
ValueUnitsTest Method / Conditions
Melting Range138.5 - 141°C
Flash Pointmin. 150°C
Vapor Pressure (at 20°C)2.0e-10Pa
Specific Gravity (at 20°C)1.22g/mL
Bulk Density0.55 - 0.65g/l
Solubility
ValueUnitsTest Method / Conditions
Acetone (at 20°C)2g/100g
Chloroform (at 20°C)35g/100g
Cyclohexane (at 20°C)5g/100g
Ethanol (at 20°C)0.3g/100g
Toluene (at 20°C)20g/100g
Ethyl Acetate (at 20°C)4g/100g
n-Hexane (at 20°C)0.6g/100g
Methanol (at 20°C)max. 0.1g/100g
Methylene Chloride (at 20°C)34g/100g
Water (at 20°C)max. 0.01g/100g

Storage & Handling

Product Handling

In accordance with good industrial practice, handle with care and avoid unnecessary
personal contact. Avoid continuous or repetitive breathing of dust. Use only with adequate ventilation. Avoid dust formation and ignition sources.

Storage Conditions

PUREsorb 234 has to be stored in tightly sealed original container in a cool and well-ventilated area, away from direct sunlight.