B 501W is a synergistic mixture of Antioxidant 1425 WL and Antioxidant 168 (ratio 1:1). It is highly effective in polypropylene fibers against thermo-oxidative degradation.

SPECIFICATIONS

Chemical Name     1:1:2-Combination of Phosphonic acid, [[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl] methyl]-,monoethylester, calcium salt (2:1); polyethylene-wax and phenol, 2,4-bis(1,1-dimethylethyl)-,phosphate.

Structure          Antioxidant 1425          and         Antioxidant 168  

Molecular Weight   Antioxidant 1425: 695                 Antioxidant 168: 647