Antioxidant ST - 626

Chemical name: dipentaerythritol diphosphite (2.4-di-tert-butyl phenyl)

molecular weight：604                                                        

molecular formula：C33H50O6P2

CAS NO. ：26741-5

quality standard

Properties: white crystalline powder or particle in appearance; Molten cheng 160-180 ℃; Flash point 168 ℃; Ignition point 421℃; Bulk density 0.43g/mL; The lower limit of dust explosion concentration is 0.12kg /m3, and the explosive index is 0.37. Soluble in toluene, dichloromethane and other organic solvents, slightly soluble in alcohol, insoluble in water.

Characteristics and advantages: improving polymer in ingredients, the stability in the process of production and use, the less the degradation of polymer in the processing, in many applications to improve polymer flue gas fade resistance, high performance and low inventory can form more efficient formula, compared with other equivalent phosphite antioxidant, with higher phosphorus content; It can be used as a synergist of light - resistant stabilizers such as phenylketone and benzotriazole.

USES: this product is a kind of high performance organic phosphorous ester antioxidant, which can protect the color of polymer.It is superior to other phosphite esters, generally not used alone, and often used in combination with antioxidant st-10 and other major phenolic antioxidants, which can improve the thermal stability of polymer processing. This product is widely used in high molecular materials such as PE, PP, PS, polyamide, polycarbonate and ABS.

Storage and transportation: the product is resistant to hydrolysis, should pay attention to moisture and heat.

Packing: cardboard drum (box) lined with plastic bag, each bag (box) net weight of 25Kg.

Reference dosage: general dosage is 0.1%-0.3%.

Validity period: 6 months.