Secondary Antioxidant 168
Basic Information:
Product name: Secondary Antioxidant 168
Chemical name: Tris (2, 4-ditert-butylphenyl) phosphite ester
Synonyms: Secondary Antioxidant 168; tri (2,4-Ditertrabutylphenyl) phosphiteester;
CAS number: 31570-04-4
Molecular formula: C42H63O3P
Molecular weight: 646.94
EINECS No.: 250-709-6
Structural formula:
Related categories: plastic additives; antioxidant; organic chemical raw materials;
Melting point: 181-184°C (lit.)
Boiling point: 594.2±50.0°C (Predicted)
Density: 0.98
Flash point: 46 ℃ (115 F)
Solubility: easily soluble in benzene, chloroform, cyclohexane, etc., slightly soluble in ethanol, acetone, insoluble in water, alcohol and other polar solvents, slightly soluble in esters.
Properties: White powder
LogP: 18 at 25℃
Sensitivity: the moisture is sensitive.
| Specification | Unit | Standard |
| Appearance | White crystal powder | |
| Main content | % | ≥99.00 |
| Volatiles | % | ≤0.30 |
| Melting point | ℃ | 183.0-187.0 |
| solubility | clear | |
| Light transmittance | ||
| 425nm | % | ≥96.00 |
| 500nm | % | ≥98.00 |
| 2.4-DTBP | % | ≤0.20 |
| acid value | Mg KOH/g | ≤0.25 |
| hydrolyze | H | ≥14 |
1.Organic polymer auxiliary antioxidant.
2.Reduce melt flow rate (MFR) to color during polymer thermal processing。
3.It has a good synergistic effect with the blocked phenolic antioxidant 1010,1076,313,114, etc., and can also provide the combination of the above four products.
4.It can be used together with benzotriazole UV absorbers and hindered amine photostabilizers in outdoor products.
It is widely used in polyolefin (such as polyethylene, polypropylene) and olefin copolymer, polyamide, polycarbonate, PS resin, PVC, engineering plastics, rubber and petroleum products, ABS resin and other polymer materials. Complexes can also be used in adhesives, natural or synthetic adhesive resin, etc.
Add amount: 0.1%~1.0%, the specific add amount is determined according to the customer application test.
Packed in 20 Kg / 25 Kg carton / aluminum foil bag.
Or packed as per customer’s requirements.
Store appropriately in a dry area below 25 C with a shelf life of two years.
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