LOTNOX 259(ANTIOXIDANT 259) (CAS:​35074-77-2 )

Characterization

Lotnox 259, a sterically hindered phenolic antioxidant, is an efficient, nondiscoloring stabilizer for organic substrates such as plastics, synthetic fibers,  and elastomers.

Chemical name

Hexamethylene bis(3-(3,5-di-tert.-butyl-4-hydroxyphenyl)propionate)

CAS number

35074-77-2 

Chemical formula

Molecular weight

630 g/mol

Applications

Lotnox 259 is especially suited for the stabilization of polyacetals. Its use  is also recommended in other polymers such as polyesters, polyolefins,  polyols, polyurethanes, elastomers, adhesives, and other organic substrates.

Features/benefits

Lotnox 259 provides excellent processing and long-term thermal stability  as well as excellent initial resin color. It has good compatibility with most  substrates, low volatility, and is resistant to extraction.

Guidelines for use

Lotnox 259 is recommended for use in polyacetal homopolymers and copolymers at concentrations of 0.05%–0.5% depending on the polymer type,  method of incorporation, application, and degree of stability required. It is easily dispersed into the polymer by conventional extrusion compounding techniques. Suggested use concentrations for Lotnox 259 in polyesters, polyolefins,  polyols, polyurethanes, elastomers, and adhesives range from 0.05 %– 1.0 %  depending on the substrate and the stability required.  The product can be used alone or in combination with other additives such  as light stabilizers (e. g. ultraviolet absorbers, hindered amines), costabilizers  (e. g. phosphites, thioethers, hydroxylamines), and other functional stabilizers. Performance data for Lotnox 259 alone and in combination with other  additives are available on request in a variety of substrates.

Physical Properties

Melting range                           103 – 108 °C

Flashpoint                                 280 °C 

Vapor pressure (20 °C)             1.3 E-8Pa 

Density (20 °C)                         1.08 g/ml

Bulk density

Powder                                     550 – 650 g/l 

Solubility (20 °C) g/100g solution  

Acetone                                   36 

Benzene                                  39 

Chloroform                             47

 Ethyl acetate                          25

 n-Hexane                              1.5 

Methanol                               1.7 

Paraffin oil                             < 0.1

 Water                                    < 0.01 

Volatility (TGA, air at 20 K/min) 

Temperature at 1 % weight loss                270 °C 

Temperature at 10 % weight loss              335 °C

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.