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Specifications
|
Appearance: |
White to light yellow crystalline powder |
|
Melting point: |
76–79 °C |
|
Specific gravity (20 °C): |
1.14 g/cm³ |
|
Solubility (20 °C): (% w/w) |
|
|
Acetone (% w/w): |
2% |
|
Benzene (% w/w): |
0.01% |
|
Chloroform (% w/w): |
40% min |
|
Methylene chloride (% w/w): |
40% min |
|
Hexane (% w/w): |
0.1% max |
|
Ethyl acetate (% w/w): |
37% min |
|
Methyl alcohol (% w/w): |
12% |
|
Polyether (% w/w): |
3% |
|
Water (% w/w): |
0.01% max |
Antioxidant 245丨CAS 36443-68-2 is a phenolic antioxidant, specifically a hindered bisphenol, used to prevent the degradation of polymers and elastomers during processing and end-use. It is particularly effective in preventing oxidative degradation of materials exposed to heat, oxygen, and mechanical stress. It is widely applied in industries involving plastics, rubber, adhesives, and lubricants.
Applications
1. Polymer Stabilization
Used to protect a wide range of polymers from oxidative degradation, such as:
Polypropylene (PP)
Polyethylene (PE)
Acrylonitrile butadiene styrene (ABS)
Polyamides
Polyurethanes
Offers long-term thermal stability and helps maintain mechanical properties over time.
2. Rubber and Elastomers
Widely used in synthetic and natural rubber processing to extend product life.
Prevents cracking, discoloration, and loss of elasticity due to oxidation.
3. Adhesives and Sealants
Enhances the oxidative and thermal stability of hot melt adhesives and structural sealants, especially under elevated temperatures or long-term exposure.
4. Lubricants and Greases
Acts as an antioxidant in industrial and automotive lubricants, where it slows the formation of sludge and varnish from oxidative degradation.
5. Coatings and Resins
Incorporated into epoxy and alkyd resin systems to improve aging resistance and color retention during curing and service.
Benefits and Features
High thermal stability: Effective even at elevated processing and service temperatures.
Non-discoloring: Maintains optical clarity and color stability in light-colored formulations.
Low volatility: Suitable for high-temperature processing.
Synergistic behavior: Can be used in combination with phosphite or thioester antioxidants for enhanced protection.
Summary
Antioxidant 245丨CAS 36443-68-2 is a highly effective sterically hindered bisphenol antioxidant used to protect a wide range of polymers, rubbers, and industrial materials from oxidative damage. Its excellent thermal stability, non-discoloring nature, and low volatility make it an ideal choice for demanding applications in plastics processing, lubricants, adhesives, and coatings.
