LOTSORB UV 765 (CAS:41556-26-7 82919-37-7)

Characterization 

Lotsorb UV 765 is a liquid hindered amine light stabilizer which is widely used to improve the  weatherability of a variety of polymers.

Chemical name 

Bis(1,2,2,6,6-pentamethyl-4-piperidyl)sebacate + methyl 1,2,2,6,6-pentamethyl-4-piperidyl seba-cate 

CAS number 

41556-26-7 and 82919-37-7

Structure 

Molecular weight

508 g/mol

Applications 

Lotsorb UV 765 is a highly effective liquid stabilizer used for a wide range of polymers and applications including polyurethanes, sealants, adhesives, elastomers, unsaturated polyesters, acrylics, vinyl  polymers (PVB, PVC), styrene homo- and copolymers, polyolefins, liquid color concentrates, and  other organic substrates 

Features/benefits 

Lotsorb UV 765 provides outstanding performance and its liquid form provides ease of handling and incorporation. It is compatible in a wide array of substrates. 

Lotsorb UV 765 has low volatility and is thermally stable.

Product forms

Code                     Lotsorb UV 765 

Appearance          clear, slighlty yellow liquid

Guidelines for use 

Use levels for Lotsorb UV 765 range between 0.1% and 1.0%, depending on the substrate and performance requirements. Synergistic performance may be obtained when Lotsorb UV 765 is used with  an ultraviolet light absorber. Performance data are available in many substrates. For optimum effectiveness, adequate base stabilization (e.g. antioxidants/ processing stabilizers) of the polymer is necessary to prevent thermal oxidation. Sulfur containing stabilizers such as thioesters have sometimes been found to have a negative effect on the performance of Lotsorb UV 765.  Such influences should be evaluated in specific customer testing. Lotsorb UV 765 may crystallize during storage below 0°C, however the product can be easily liquefied  by slight warming

Physical Properties

Melting Range                      not applicable

Flashpoint                             92 °C 

Density (20 °C)                      0.993 g/cm³

Vapor Pressure (20 °C)          1 E-4 Pa

Solubility (20°C)                    % w/w 

Water                                     < 0.01  

Acetone                                 > 50

Chloroforme                          > 50

Cyclohexane                          > 50 

Ethanole                                > 50

Ethyl acetate                         > 50

n-Hexane                              > 50

Methanole                            > 50 

Methylene chloride              > 50 

Toluene                                 > 50 

Volatility Pure substance; TGA, heating rate 20 °C/min in air 

Weight loss (%)                    Temperature (°C) 

1.0                                        225 

3.0                                        250 

10.0                                      275

Packaging and handling 

Packaging: 25Kg/Drum       

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.