Antioxidant 626 CAS 26741-53-7

CAS:26741-53-7
Purity:98%
Molecular Formula:C33H50O6P2
MW:604.69
EINECS:247-952-5

Synonyms:antioxidant24;Ultranox626;3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane;;2,4,8,10-Tetraoxa-3,9-diphosphaspiro5.5undecane,3,9-bis2,4-bis(1,1-dimethylethyl)phenoxy-;3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecan;4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane,3,9-bis[2,4-bis(1,1-dimethylethyl)phenoxy]-2;phosphorousacid,cyclicneopentanetetraylbis(2,4-di-tert-butylphenyl)ester

What is Antioxidant 626？

This product is a white crystalline powder with a melting point of 160-175°C, a flash point of 168°C, and a burning point of 421°C. It is easily soluble in organic solvents such as toluene, methyl chloride, and chloroform, slightly soluble in alcohol, and insoluble in water. Antioxidant 626 is a white to off-white powder with low volatility and higher efficiency. It is often used in combination with hindered phenol antioxidants.

Specification

ITEM	STANDARD
Appearance	White pellets or powder
Melting range ℃	170.0-180.0
Volatile content %	≤1.0
Acid Value mgKOH/g	≤1.0
Free 2,4-DTBP %	≤1.0
Purity %	≥96.0
Assay %	≥98.0

Application

‌1. Antioxidant 626 is mainly used in the synthesis and processing of various plastics such as polypropylene, polyethylene, ABS, polycarbonate fiber and polyester resin. ‌

2.Antioxidant 626 is a phosphite auxiliary antioxidant with low volatility, which can effectively prevent polymer discoloration, reduce polymer degradation rate, and improve the resin’s resistance to gas fading. It is particularly suitable for polyolefins and olefin copolymers, polycarbonate, polyamide and other engineering plastics, as well as rubber, coatings and adhesives. The addition of antioxidant 626 can significantly improve the processing stability of the material, and is widely used in the processing of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polyvinyl chloride and other thermoplastics and elastomers. middle. In addition, antioxidant 626 also has excellent prevention of discoloration caused by light and heat, as well as a certain light stabilization effect, which can improve the light, thermal stability, mechanical strength and color stability of the product, thereby extending the life of the product.

3.Antioxidant 626 has stable chemical properties and good compatibility with most polymers. It is an efficient phosphite auxiliary antioxidant. Its use can not only improve the processing stability of materials, but also improve the light, thermal stability, mechanical strength and color stability of products. It is an important additive widely used in the plastics industry