ST-1301 Eco-Friendly Flame Retardant Synergist for PE 

Product Overview

ST-1301 is an environmentally friendly phosphorus-based flame retardant synergist designed to enhance the performance of halogenated flame retardants. It fully complies with stringent environmental regulations such as EU RoHS and REACH. ST-1301 serves as a partial or complete replacement for antimony trioxide (Sb₂O₃) in flame-retardant polymers including PE, PP, and TPE, offering significant cost savings while maintaining high flame retardancy. It exhibits excellent thermal stability, very low solubility in water, and minimal moisture absorption, ensuring no hydrolysis or leaching, and has little impact on the physical properties of the base material.

Product properties:

Recommendations for Use

1. Due to its low dosage in flame-retardant resins, it is recommended to pre-mix ST-1301 with other additives before blending with the resin to ensure uniform dispersion and consistent flame retardant performance.

2. When fully replacing antimony trioxide, it is advised to use ST-1301 at 1–1.6 times the original Sb₂O₃ loading.

Application Example: PE-Based Formulation

Formulation (parts by weight)

Key Advantages

• Eco-Friendly: Compliant with RoHS & REACH.

• Cost-Effective: Reduces system cost by replacing Sb₂O₃.

• High Thermal Stability: Suitable for high-temperature processing.

• Low Water Absorption & Solubility: Prevents migration and maintains performance.

• Easy Processing: Compatible with common polymers and additives.