LOTSORB UV 1600 (CAS:204583-39-1)

Characterization 

Lotsorb UV 1600 is an ultraviolet light absorber (UVA) of the hydroxyphenyl  triazine class exhibiting very low volatility, high absorption and good compatibility with a variety of polymers, co-additives and resin compositions.  Lotsorb 1600 allows polycarbonates, polyesters, and acrylics to achieve a  higher resistance to weathering than conventional hydroxyphenyl triazine,  benzotriazole or cyanoacrylate UV absorbers.

Chemical Nature 

2-hydroxyphenyl-s-triazine derivative

Applications

Lotsorb UV 1600 applications include polyalkene terephthalates and naphthalates, linear and branched polycarbonates, acrylics (PMMA) and their copolymers, modified polyphenylene ether compounds, various high performance  plastics, PA, SAN, ASA, as well as polyolefins. The use of Lotsorb UV 1600 is indicated in polymer blends & alloys, such as  PC/ABS, PC/PBT, PPE/IPS, PPE/PA and copolymers as well as in reinforced, filled and/or flame retarded compounds, which can be transparent,  translucent and/or pigmented.

Features/Benefits

 Due to its very low volatility, excellent thermal stability and high extinction  coefficient, Lotsorb 1600 is particularly suitable for processing and aging  conditions where high loadings, very good compatibility, and outstanding  durability are required. Such requirements are especially critical for thin  layers and films in general, e.g. extruded or co-extruded articles such as  plain, multi-wall and corrugated sheets, oriented and biaxially oriented thin  films, co-extruded or co-injected semi-finished parts, fibers and complex  moldings. Thanks to the high compatibility with polycarbonate combined with its  extremely low volatility Lotsorb 1600 can be used in caplayer compounds  avoiding plate-out, contributing to less frequent cleaning during extrusion.  Moreover, its very high UV screening activity allows the use of lower concentrations than with traditional UV absorbers. This may be of particular importance when using Lotosrb 1600 in applications requiring high concentrations  of UV absorbers. It also offers the opportunity to extend the service life of  end-use articles

Product Forms 

Lotsorb UV 1600, yellowish, free-flowing powder

Guidelines for use

 Lotsorb UV 1600 (0.2 – 6 % by weight) can be readily incorporated into the  polymer by using conventional techniques, e. g. powder, solution, or melt  blending. Lotsorb UV 1600 can be used alone or in combination with other  functional additives such as antioxidants (hindered phenols, phosphites) and  HALS light stabilizers, where often a synergistic performance is observed.  Extensive performance data are available in many of the substrates listed  above.

Physical properties

 Melting range                          120 – 130 °C 

Flashpoint                                not applicable 

Vapor pressure (25 °C)             < 0.1 pPa 

Specific gravity (at 25 °C)         1.05 g/ml

 Bulk density                            0.42 g/ml 

Angle of repose                       36° 

Solubility (20 °C)                      g/l 

Acetone                                   2.4 

Chloroform                              547

 Ethanol                                   8.7

 Ethyl acetate                           22.8 

MMA                                       75 

Methylene chloride                 530 

THF                                          540 

Volatility (pure substance; TGA, heating rate 20 °C/min in air)

 Weight loss %                      Temperature °C 

1.0                                        366 

5.0                                        412 

10.0                                      432

Absorbance spectrum

Lotsorb UV 1600 exhibits  strong absorbance  in the 300 – 400 nm  region and minimal  absorbance in the visible region (> 400 nm).  The absorption maximum ist at 302 nm  (ε =7.1 · 104 l/mol · cm)  in chloroform solution. 

Packaging and handling 

Packaging: 20Kg/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.