Antioxidants

Mayzo provides a variety of antioxidants, which are useful to protect adhesives, lubricants, plastics, elastomers, and coatings from oxidation during high temperature processing and/or exposure to elevated temperatures during end-use. Antioxidants are subdivided into chemical families having different performance characteristics, including phenolic antioxidants, metal deactivators, amine antioxidants, phosphites, thiosynergists, and hydroxylamines. Blends of different kinds of antioxidants are often used in order to provide optimal performance.

Phenolic Antioxidants

Hindered phenols are the most widely used antioxidants and are highly effective in an extensive range of applications. They function as free radical scavengers and provide protection during high temperature processing operations and also during end use at elevated temperatures. Combinations of phenolic antioxidants with phosphites and thiosynergists are often used.

BNX 1010
   Solid, high molecular weight phenolic antioxidant
   Low volatility, excellent thermal stability, good compatibility with most resins
   Excellent choice for general purpose use
   Broad food contact clearances in adhesives and plastics
   Available in a blend (BNX 1225) with the phosphite antioxidant Benefos 1680
     is a high molecular weight hindered phenolic

BNX 1076
   Solid antioxidant useful for the stabilization of polyolefins (polyethylene,
     polypropylene), polystyrene, ABS resin, PVC resin, and EPDM

BNX 1035
   Solid antioxidant particularly useful for the stabilization of polyethylene,
     styrenic polymers, polypropylene, and elastomers such as EPDM and
     SBR and for carboxylated SBR latex, polybutadiene rubber and
     polyisoprene rubber

BNX 2246
   Solid antioxidant used for the stabilization of ABS, EVA, and polyolefins
     polyethylene, polypropylene)

BNX 1077
   Liquid antioxidant recommended for use in lubricants, PVC, ABS, elastomers
     such as SBR, BR, & NBR, polyols, and polyurethane foams

BNX TAHQ
   Solid, non-staining hydroquinone-based antioxidant recommended for use
     in unvulcanized rubber adhesives, tapes and films.

Metal Deactivators

Metal deactivators are special phenolic antioxidants containing functional groups that enable them to complex with and deactivate metal ions, which can accelerate the oxidation of plastics. They are widely used in wire and cable insulation applications to protect plastics from exposure to metals such as copper during end use.

BNX MD-1024
   Solid, dual functional antioxidant and metal deactivator
   Recommended for use in polyolefins and some thermoplastic elastomers used
     as primary insulation in wire and cable applications, and in other applications
     in which there is contact with copper or other metals.

BNX MD-1097
   Solid, dual functional antioxidant and metal deactivator
   Recommended for use in polyolefins and some thermoplastic elastomers used
     as primary insulation in wire and cable applications, and in other applications
     in which there is contact with copper or other metals
   Lower melting point than BNX MD-1024 for easier processing

Phosphite

Phosphite antioxidants function by decomposing peroxides and provide protection to adhesives, plastics, and coatings during high temperature processing but not during end-use at elevated temperatures. Combinations with phenolic antioxidants often show synergistic performance and are widely used.

Benefos 1680
   Solid phosphite for general-purpose use in adhesives, plastics, and coatings
   Excellent resistance to hydrolysis
   Available in a blend (BNX 1225) with the phenolic antioxidant BNX 1010

Thiosynergist

Thiosynergists also function by decomposing peroxides. When used in combination with phenolic antioxidants, they provide unsurpassed protection to plastics against exposure to elevated temperatures during end-use. However, they are generally less effective than phosphites in providing protection during high temperature processing operations.

BNX DLTDP
   Solid thiosynergist for general purpose use in plastics, elastomers
     and lubricants

Hydroxylamine

Hydroxylamines are powerful antioxidants that can function both as free radical scavengers and as peroxide decomposers. They provide excellent processing stability to plastics while producing less discoloration (especially on exposure to combustion gases) than phenolic antioxidants. Combinations with some hindered amine light stabilizers (HALS) can also provide good protection to plastics against exposure to elevated temperatures during end-use.

BNX 2000
   Solid hydroxylamine antioxidant for general use in plastics

Antioxidant Blends

BNX 1000
   Proprietary liquid antioxidant blend highly effective for the protection
     of adhesives, elastomers, and other polymer systems
   Liquid form provides excellent dispersibility in both solvent- and
     water-based formulations
   Low volatility, good compatibility with a wide range of substrates, and
     good resistance to extraction

BNX 1225
   Solid blend of 50% of the phenolic antioxidant BNX 1010 and 50% of
     the phosphite Benefos 1680
   Provides excellent processing and long term thermal stability in a
     wide range of plastics