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.  Thiosynergists are generally used for applications requiring good long term thermal stability.  Such applications include wire and cable, pipe, polyolefin under the hood automotive and adhesives.



BNX® DLTDP is a thioether antioxidant.  High solubility and superior properties make it particularly suitable for the protection of plastics, rubber, synthetic fibers, and petroleum products agains deterioration and discoloration.  Used in combination with phenolic primary antioxidants, it has proven particularly effective as a result of synergistic effects.

Material Description:   Thioether antioxidant and process stabilizer for resins, adhesives, plastics, and lubricants.

Chemical Names:  Propanoic acid, 3,3’-thiobis- 1,1’-didodecyl ester (TSCA name)

Dilauryl thiodipropionate (common name)

Molecular Formula:      C30H58O4S

CAS Number:               123-28-4

Molecular Weight:       514.86 g/mol

Chemical Structure:  


Physical Properties:    

Acid value:                                       1.00 maximum

Appearance:                                     White crystalline beads or flakes

Flash point:                                       160oC (open cup)

Melting range:                                      39-42oC

Specific gravity:                                   1.01-1.04


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BNX DSTDP is a thioether-type antioxidant that functions by scavenging peroxides formed during the thermal oxidative degradation of plastics and other organic materials.  Combinations of this product with hindered phenolic antioxidants (e.g. BNX 1010) provide outstanding thermal stability in polyolefins, styrenic polymers, and engineering plastics.  BNX DSTDP is non-discoloring, has good compatibility with polyolefins, styrenic polymers, and adhesives, and has low odor relative to other sulfur-based antioxidants.

Material Description:            Thioether Antioxidant/Heat Stabilizer

Chemical Name:                   Dioctadecyl 3,3’-thiodipropionate

CAS #:                                   693-36-7

Molecular Weight:                683 g/mol

Chemical Structure:

Physical Properties:            Appearance:                   White to off-white flakes

Melting Point:                  64-67°C

Flash Point:                     257oC (Markusson)

Solubility in Water:           <0.1 mg/L


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