Phosphite Antioxidants

Phosphite Antioxidants

Phosphite antioxidants function by decomposing peroxides and provide protection to adhesives, plastics, and coatings during high temperature processing but do not provide long term thermal stability.  Combinations with phenolic antioxidants often show synergistic performance and are widely used.


Benefos® 1618

Overview

Benefos 1618 is a phosphite-type antioxidant for the stabilization of a wide range of plastics, elastomers, adhesives, and other substrates.

Chemistry

Chemical Name:                     2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-bis(octadecyloxy)

CAS Number:                         3806-34-6

Chemical Structure:

Benefos 1618

Typical Properties         

Product Form:                         Solid

Melting Point:                          50 – 65oC

Molecular Weight:                   732 g/mol

Product Details: Please view our Benefos 1618 PDF

Benefos 1626

Overview

Benefos 1626 is a phosphite type antioxidant of high phosphorous content.  This secondary antioxidant provides excellent heat stability and reduction in polymer degradation during processing.  Benefos 1626 has good synergism when used with light stabilizers such as benzophenones and benzotriazoles.

Chemistry

Chemical Name:                     Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite

CAS Number:                         26741-53-7

Chemical Structure:

Benefos 1626

Typical Properties         

Product Form:                         Solid

Melting Point:                          170 – 180oC

Molecular Weight:                   605 g/mol

Product Details: Please view our Benefos 1626 PDF

Benefos 1680

Overview
Benefos 1680 is a phosphite type antioxidant of low volatility and extremely resistant to hydrolysis.  This secondary antioxidant provides excellent heat stability and antioxidation, with good compatibility with resins and excellent extraction resistance.  Benefos 1680 performs best when combined with a primary antioxidant (i.e. BNX 1010 or BNX 1076).

Chemistry

Chemical Name: Tris(2, 4-di-tert-butylphenyl)phosphite

CAS Number:   31570-04-4

Chemical Structure:

Benefos 1680

Typical Properties

Product Form:   Solid

Melting Point:   183 – 187oC

Molecular Weight:   647 g/mol

Product Details: Please view our Benefos 1680 PDF