ANTIOXIDANT 626
Chemical Name: Bis(2.4-di-t-butylphenyl) Pentaerythritol Diphosphite
Introduction: The product takes on an appearance of white crystalline powder or grains. The
melt point ranges from 160℃ to 180℃. Flash point: 168℃ kindling point: 421℃ stacking
density: 0.43g/mL lower limit concentration of dust explosion: 0.12Kg/m3 explosion index:
0.37 soluble in organic solvents like toluene, dichloromethane, and slightly soluble in
alcohols but insoluble in water.
Physical Properties:
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Appearance:
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White crystalline powder or grains
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Acid value:
(mg KOH/g)
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≤1.0%
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Melting Range:
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≥160℃
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Volatiles:
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≤1.0%
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free 2,4-di-tert.-butyl-phenol，: (%)
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≤1.0%
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Applications: The product is a kind of higheffective solid phosphite ester antioxidant, which is superior to other phosphite
ester in the effective protection of polymers’ color. It is often blended with phenolic principal antioxidant (such as AT10) to
prepare composite antioxidant which improves the thermostability of polymer processing, thus making it widely applied in PE,
PP, PS, PA, PC, ABS and many other polymermaterials.
Package: cardboard boxes with plastic liners, net weight: 20Kg / box.
Storage: Because of the low performance on hydrolyzing resistance, protection from moisture and heat is needed.
Period of Validity: About 6 months