LOTSORB UV 1 (CAS:57834-33-0)

Characterization

Lotcure UV 1 is a liquid formamidine type UV absorber which impars excellent  light stability to a number of polyurethane systems during their use.

Chemical Name

Benzoic acid, 4-[[(methylphenylamino) methyleneJamino]-, ethyl ester

CAS Number  57834-33-0

Structure

Molecular weight

 282.3 g/mol

Applications

Lotsorb UV 1 provides excellent light protection to polyurethane systems such as microcellular and integral skin foams, traditional rigid, semirigid and flexible foams, fabric coatings for synthetic leather, but also to some adhesives, sealants and elastomers. The product can also be used in other polymeric systems where a liquid light stabilizer isl preferred.

Features/ Benefits

The liquid UV absorber Lotsorb UV 1 is easily and homogeneously miscible with both polyester and polyether polyols and is highly soluble in many solvents. It shows good compatibility with isocyanates as well as with other additives used in polyurethane systems. It has a very strong absorption especially in between 300 and 330nm of theUV-spectrum where UV radiation is in particular degradative for polyurethane systems. It can be used alone but due to its special absorption characteristics it is especially well suited to be used in combination with other possibly needed components of a stabilizer system such as hindered amine light stabilizers (HALS), other UV-absorbers, phenolic antioxidants, phosphites and benzofuranones.

Guidelines for use

It is recommended to be used in combinations with other stabilizing additives such as other UV-absorbers, hindered amine light stabilizers (HALS), phenolic antioxidants and costabilizers (Phosphites), and benzofuranones.

Physical Properties

Melting Range                                        27-28°C

Flashpoint                                              >100°C

Density (20°C)                                        1.127 g/cm³

Viscosity (20°C)                                      -9000 mPa.s

Solubility / miscibility (20°C)                  % w/w

Water                                                      <0.01

Acetone                                                  >50

Butylacetate                                            >50

Ethanol                                                   >50

Isopropanol                                            > 50

Methanol                                                >50

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

Weight Loss (%)                                     Temperature (°C)

10                                                           177

2.0                                                          200

5.0                                                          228

Absorption Spectrum (10 mg/l, Chloroform):

Exhibit strong

absorbance in the 280-350 nm region and no absorbance in the visible area(>400 nm) of the spectrum. The absorption maximum is at 308 nm in chloroform solution

Wavelength (nm)

Storage Information 

Owing to chemical structure LOTSORB UV 1 is somewhat sensitive to hydrolysis and light. The product, therefore, should be stored in tightly sealed containers and protected from light in a cool and dry ventilated environment. Upon longer storage time crystallization could occur. Warming up in a heat chamber (Tmax 60°C) is recommended.

Handling & Safety

 In accordance with good industrial practice, handle with care and avoid unnecessary

personal contact. Avoid continuous or repetitive breathing of vapour. Use only with adequate ventilation.

For more detailed information please refer to the material safety data sheet.

Packaging

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.