
Antioxidant 168
Antioxidant 168 is a phosphite ester antioxidant with excellent hydrolysis resistance. As an auxiliary antioxidant, it can decompose the hydroperoxides produced during the oxidation of polymers, preventing the oxidative degradation of polymers. When used in combination with phenolic primary antioxidants, it can exert an excellent synergistic effect. The application scope includes polyolefins, such as polyethylene, polypropylene, polybutene and olefin copolymers; It can also be applied in polyamide, polycarbonate, polyvinyl chloride, styrene homopolymer or copolymer, elastomers, adhesives and other organic materials. Recommended addition amount: 0.05% to 0.2%.
CAS #: 31570-04-4
Chemical Structure:

Formula: C42H63O3P
Molecular weight: 647
Shelf Life: 24 months
Physical peroperties:
This product is soluble in chloroform, cyclohexane, n-hexane, dichloromethane, toluene, etc., slightly soluble in methanol and acetone, insoluble in water, with low volatility and excellent hydrolytic stability.
Performance and application:
Antioxidant 168 is a phosphite ester antioxidant with excellent hydrolysis resistance. As an auxiliary antioxidant, it can decompose the hydroperoxides produced during the oxidation of polymers, preventing the oxidative degradation of polymers. When used in combination with phenolic primary antioxidants, it can exert an excellent synergistic effect. The application scope includes polyolefins, such as polyethylene, polypropylene, polybutene and olefin copolymers; It can also be applied in polyamide, polycarbonate, polyvinyl chloride, styrene homopolymer or copolymer, elastomers, adhesives and other organic materials. Recommended addition amount: 0.05% to 0.2%.
Storage and Package:
It should be stored in a dry and cool environment as a general chemical and kept in a sealed carton.
Packed in cartons or paper-plastic composite bags lined with plastic bags, 25Kg/carton(bag).
Specification:
| ITEMS | SPECIFICATIONS | |
| Appearance | White powder or beads | |
| Melting point range,℃ | 183.0~187.0 | |
| Heating reduction,% | 0.30 Max | |
| Solubility | Clear | |
| Light transmittance,% | 425nm | 98.0 Min |
| 500nm | 98.0 Min | |
| Acid value,mg KOH/g | 0.30 Max | |
| Main content,% | 99.0 Min | |
| Content of 2, 4-di-tert-butylphenol,% | 0.20 Max | |
| Anti-hydrolysis performance(95℃,>5h) | pass | |
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