Overview
BNX® 1425 is a multifunctional additive that functions as a primary antioxidant for the stabilization of plastics, synthetic fibers, and elastomers against thermal oxidative degradation. It is also an effective esterification catalyst for the production of rosin ester tackifier resins and in the solid-state polymerization of PET and other thermoplastic polyesters.
Chemistry
Chemical Name: Calcium bis(ethyl 3,5-di-tert-butyl-4-hydroxy
benzylphosphonate)
CAS Number: 65140-91-2
Chemical Structure
Typical Properties
Product Form: Solid
Melting Range: >260oC
Molecular Weight: 694.8 g/mol
Applications
BNX® 1425 is particularly useful as a stabilizer and esterification catalyst in the production of rosin ester tackifier resins and in PET and other thermoplastic polyesters. It is also suitable for use in the stabilization of polyolefins (particularly polypropylene fibers), cross-linked elastomers, and specialty adhesives.
Advantages
- In rosin esters, enables shorter reaction times and gives products characterized by reduced discoloration, a low acid number, and improved heat stability
- In PET, provides faster solid-state polymerization, improved color, and reduced generation of acetaldehyde and cyclic oligomers
- Excellent resistance to migration and extraction
- Very low-volatility
- Extensive FDA clearances
Guidelines for Use
In rosin esters, suggested use levels generally range from 0.05 to 1% by weight. BNX® 1425 can be used in combination with other additives in rosin esters, including antioxidants (especially BNX® 3595 and BNX® 565), disproportionation agents (BNX® 358), and light stabilizers.
In PET, suggested use levels range from 0.01 to 0.2% by weight. The product may be added at different stages in PET production, for example in slurry preparation (as a solution in ethylene glycol), during the esterification step, or after finishing (by extrusion compounding). In processes utilizing phosphoric acid, sequential addition is necessary to avoid undesired interactions. BNX®1425 can be used in combination with other additives in polyesters, including antioxidants, UV absorbers, and benzoate light stabilizers.
In all applications, 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 your Mayzo representative for specific recommendations for your application.
Storage
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.
Safety
Please consult the Safety Data Sheet (SDS) prior to handling or using this product.
FDA Regulations
BNX® 1425 has been cleared for use in food contact applications under 21 CFR §178.2010 (antioxidants and/or stabilizers for polymers). Please consult the referenced regulations for complete details, including restrictions of use.
