BNX 1225 TPR

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BNX 1225 TPR is a 45% active pelletized concentrate of the antioxidant blend BNX 1225 in an SIS (styrene-isoprene-styrene) thermoplastic rubber.  

Chemistry (Active Components)

Chemical Names:

BNX 1010: Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 1,1′- [2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1- oxopropoxy]methyl]-1,3-propanediyl] ester

Benefos 1680: Phenol, 2,4−bis(1,1−dimethylethyl)−, 1,1′,1”−phosphite

CAS Numbers: BNX 1010: 6683-19-8
Benefos 1680: 31570-04-4
Chemical Structures: BNX 1010: Benefos 1680:
 BNX 1010  Benefos 1680

Typical Properties         

Product Form:                 Solid

BNX 1225 Content:         43 – 47% by weight

Pellet Weight:                  0.6 – 1.2 g/50 pellets


Please refer to the product data sheets for BNX 1010 and Benefos 1680 for solubility information.


BNX 1225 is a convenient blend of both a primary and secondary antioxidant. This synergistic blend addresses a broad range of stabilization needs. It is ideal for use as a melt processing stabilizer in polyolefins such as polypropylene, polyethylene, polyolefin copolymers and blends, and TPO’s. This product is also useful as an antioxidant and processing stabilizer for other materials as well, including adhesives, elastomers, polyurethanes, styrenic polymers, and engineering plastics.


  • Ease and convenience for compounding operations
  • Provides excellent melt stability in a wide range of polyolefins
  • Phosphite component features excellent hydrolytic stability
  • Non-discoloring
  • Low volatility at high processing temperatures
  • Extensive FDA clearances

Guidelines for Use

Typical recommended loading concentrations range between 0.05% and 0.5%. BNX 1225 is also suitable for use in combination with light stabilizers, including hindered amine light stabilizers (HALS), UV absorbers, and benzoates. The exact formulation to be used is dependent on the substrate, performance requirements, and other factors, and should be determined by the user based on testing to simulate actual conditions of use. Please contact Mayzo for specific


This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.


Please consult the Safety Data Sheet (SDS) prior to handling or using this product.

FDA Regulations

The components of BNX 1225 have extensive FDA clearances, including in adhesives, olefin polymers and copolymers, polystyrene (including rubber-modified polystyrene), lubricants, and many other applications. Please contact your Mayzo representative for complete details, including restrictions of use.

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