Ciba Specialty Chemicals
Additives
Polymer Additives
Ciba ® TINUVIN ® 234
Low volatile Benzotriazole UV Absorber
Characterization
TINUVIN 234 is a high molecular weight ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class, imparting outstanding light stability to a variety of polymersduring its use.
2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol70321-86-7®TINUVIN 234
HONNN
Chemical NameCAS NumberStructure
Molecular weightApplications
447.6 g/mol
TINUVIN 234 is highly effective for polymers usually processed at high temperatures such aspolycarbonate, polyesters, polyacetal, polyamides, polyphenylene sulfide, polyphenyleneoxide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers, whereloss of UVA is not tolerated as well as for polyvinylchloride, styrene homo- and copolymers.Applications include molded articles, films, sheets and fibers.
TINUVIN 234 features low volatility, exceptional light absorbing characteristics and goodcompatibility in various substrates. This makes the product especially suitable forapplications characterized by high surface area, such as films and fiber. It protects organicpolymers as well as pigments from UV light, improving and preserving the technical andvisual performance of such applications.
TINUVIN 234 has world wide Food Contact Approvals in most polymers and is especiallysuitable in packaging applications for food, consumer care products and pharmaceuticals,preserving the package contents from the detrimental effects of light.Code:
TINUVIN 234TINUVIN 234 FFTINUVIN 234 DD
Appearance:slightly yellowslightly yellow
slightly yellow pellets
Features/ Benefits
Product Forms
Guidelines for use
The use levels of TINUVIN 234 range between 0.15 and 0.60%, depending on substrateand performance requirements of the final application. Extensive performance data ofTINUVIN 234 alone or in combination with other additives are available in many of thesubstrates listed above. IRGANOX and CHIMASSORB stabilizers where often a synergisticperformance is observed.
Melting Range137-141°CFlashpoint> 150°CSpecific Gravity (20°C)1.22 g/mlVapor Pressure (20°C)∼2 E-10 PaBulk Densitiy0.55-0.65g/cm3Solubility (20°C)%w/wAcetone2Chloroform35Cyclohexane5Ethanol0.3Ethyl Acetate4n-Hexane0.6Methanol< 0.1Methylene Chloride34Toluene20Water< 0.01
Volatility (pure substance; TGA, heating rate 20°C/min in air)
Weight loss (%)Temperature (°C)
1.022.02805.0302
Absorption Spectrum (10 mg/l, Chloroform)1TINUVIN 234 exhibits high
absorbance in the 300-400nm
0.8region and minimal absorbancein the visible region of the0.6spectrum. The absorbtion
0.4maxima are 302 nm and 343 nm.The extinction coefficients at these0.2maxima are: 17’472 and 16’128
0l/mole·cm, respectively.
Extinktion250310370nm430490Handling & Safety
In accordance with good industrial practice, handle with care and avoid unnecessarypersonal contact. Avoid continuous or repetitive breathing of dust. Use only with adequateventilation. Prevent contamination of the environment. Avoid dust formation and ignitionsources. For more detailed information please refer to the material safety data sheet.TINUVIN 234 is listed on the following Inventories:Australia:AICS Canada:DSL China:First ImportEuropean:EINECS Japan:MITI Korean:ECLPhilippines:PICCS USA:TSCA
TINUVIN 234 is approved in many countries for use in food contact applications.For detailedinformation refer to our Positive List or contact your local sales office.
Registration
IMPORTANT: The following supercedes Buyer’s documents. SELLER MAKES NO REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,INCLUDING OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. No statements herein are to be construed as inducements toinfringe any relevant patent. Under no circumstances shall Seller be liable for incidental, consequential or indirect damages for alleged negligence,breach of warranty, strict liability, tort or contract arising in connection with the product(s). Buyer’s sole remedy and Seller’s sole liability for anyclaims shall be Buyer’s purchase price. Data and results are based on controlled or lab work and must be confirmed by Buyer by testing for itsintended conditions of use. The product(s) has not been tested for, and is therefore not recommended for, uses for which prolonged contact withmucous membranes, abraded skin, or blood is intended; or for uses for which implantation within the human body is intended.
