Irganox 168 specification

　　Product Description: Irganox 168 is a hydrolytically stable organo-phosphite processing stabilizer.

　　Key Features & Benefits  - Low volatility

　　- Resistant to hydrolysis

　　- Protects polymers prone to oxidation during processing

　　- Prevents discoloration

　　Chemical Composition: Tris(2,4-di-tert-butylphenyl)phosphite

　　Properties:

　　Typical Properties: Appearance white, free-flowing powder

　　CAS number: 31570-04-4

　　Molecular weight: 646.9 g/mol

　　Melting range: 183 – 186°C

　　Specific gravity at 20℃: 1.03 g/ml

　　Density (bulk): 480 – 570 g/l

　　Solubility at 20℃ (g/100 g solution)

　　These typical values should not be interpreted as specifications.

　　Applications

　　Irganox 168 is a hydrolytically stable organo-phosphite processing stabilizer. As a secondary antioxidant, it reacts during processing with hydroperoxides formed by auto-oxidation of polymers preventing process induced degradation and extending the performance of primary antioxidants.

　　The application range of Irganox 168 comprises polyolefins and olefin co-polymers such as polyethylene (e.g. HDPE, LLDPE), polypropylene, polybutene and ethylene vinyl acetate co-polymers as well as polycarbonates and polyamides.

　　Irganox 168 blends can be used in polyesters, styrene homo- and co-polymers, adhesives and natural and synthetic tackifier resins, elastomers such as BR, SEBS, SBS, and other organic substrates. In addition, they can be used in combination with light stabilizers of the Uvinul, Tinuvin, and Chimassorb range.

　　Irganox 168 is recommended for applications such as:

　　• Powder coatings

　　• Solvent-based coatings

　　• Hot-melt adhesives

　　Irganox 168 is of low volatility and is particularly resistant to hydrolysis. It protects polymers that are prone to oxidation during the processing steps (compounding/pelletizing, fabrication, and recycling) from molecular weight change (by chain scission or crosslinking) and prevents discoloration.

　　Irganox 168 performs best when combined with other antioxidants. Blends with hindered phenols (Irganox B-blends) are particularly effective. The hindered phenols additionally provide storage stability and provide the polymer with long term protection against thermo-oxidative degradation. Irgafos 168 in phenol-free systems with other stabilizers addresses specific stabilization requirements.

　　Recommended Concentrations:

　　The amount of Irgafos 168 required for optimum performance should be determined in trials covering a concentration range. Concentrations up to several percent may be used depending on the substrate, processing conditions, and requirements of the end application.

　　Safety:

　　General The usual safety precautions when handling chemicals must be observed. These include the measures described in Federal, State, and Local health and safety regulations, thorough ventilation of the workplace, good skin care, and wearing of protective goggles.

　　Storage:

　　Properly stored and protected from humidity, heat, sunlight and water, an unopened container of Irgafos 168 should have a shelf life of at least one year. Once opened, each individual package should be used in its entirety to avoid hydrolysis.

　　Important: While the descriptions, designs, data and information contained herein are presented in good faith and believed to be accurate, they are provided for guidance only. Because many factors may affect processing or application/use, company recommends that the reader make tests to determine the suitability of a product for a particular purpose prior to use. NO WARRANTIES OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE MADE REGARDING PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION SET FORTH, OR THAT THE PRODUCTS, DESCRIPTIONS, DESIGNS, DATA OR INFORMATION MAY BE USED WITHOUT INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS. In no case shall the descriptions, information, data or designs provided be considered a part of terms and conditions of sale. Further, the descriptions, designs, data, and information furnished by hereunder are given gratis and assumes no obligation or liability for the descriptions, designs, data or information given or results obtained all such being given and accepted at the reader's risk.