LOTSORB UV P (CAS:2440-22-4 )

Characterization 

Lotsorb UV P is an ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class, imparting  good light stability to a wide variety of polymers.

Chemical name

 2-(2H-benzotriazol-2-yl)-p-cresol

 CAS number

2440-22-4 

Structure

Molecular weight 

225 g/mol

Applications 

Lotsorb UV P provides ultraviolet protection in a wide variety of polymers including styrene homo and copolymers, engineering plastics such as polyesters and acrylic resins, polyvinyl chloride, and  other halogen containing polymers and copolymers (e.g. vinylidenes), acetals and cellulose esters.  Elastomers, adhesives, polycarbonate blends, polyurethanes, and some cellulose esters and epoxy  materials also benefit from the use of Lotsorb UV P.

Features/benefits 

Lotsorb UV P features a strong absorption of ultraviolet radiation in the 300-400 nm region. It also has  a high degree of photostability over long periods of light exposure. The high absorbance combined  with photostability and the ability to release absorbed energy in non sensitizing ways make  Lotsorb UV P an effective stabilizer against the effects of ultraviolet light.

Product forms

Code: Lotsorb UV P 

 Appearance: Slightly yellow powder

Guidelines for use

The use levels of Lotsorb UV P range between 0.10% and 0.50%, depending on substrate and performance requirements of the final application. Lotsorb UV P can be used alone or in a variety of  blends .Lotsorb UV P may react with various heavy metal ions to form salts or complexes. For example, if  Lotsorb UV P comes into contact with iron or cobalt ions, colored complexes are formed. Reducing  and oxidizing agents used in polymerization and curing processes have no effect on the stability of  Lotsorb UV P.

Physical Properties 

Melting Range                         128-132 ℃

Flashpoint                                205 ℃

Specific Gravity (20℃)             1.38 g/cm3 

Vapor Pressure (20 ℃)            1.5 E-4 Pa

Solubility (20 ℃)                    % w/w 

Water                                      <0.01 

Acetone                                  3 

Benzene                                  7

Chloroform                             13 

Cyclohexane                           1 

Ethyl acetate                          3.5

 n-Hexane                              0.8

 Methanol                              0.2

 Methylene chloride              16 

Volatitility                              Pure substance; TGA, heating rate 20 ℃/min in air 

Weight Loss (%)                    Temperature ℃

1.0                                         153 

2.0                                         170 

5.0                                         190

Absorption Spectrum (10 mg/l, Chloroform)

Lotsorb UV P exhibits strong absorbance in  the 300-400 nm region and minimal absorbance in the visible region (> 400 nm)  of the spectrum. The absorption maxima  are at 301 nm and 341 nm (e = 16150  l/mol·cm) in chloroform solution.

Packaging and handling 

Packaging: 25Kg/Carton       

Store the product in a cool, dry, well-ventilated area away from incompatible materials. Unless stated, proper storage will permit usage of the product for 12 months from the manufacture date. For additional handling and toxicological information, consult the Material Safety Data Sheet.