Highly Stable Phosphinate Based Flame Retardant for PBT

Highly stable phosphinate based flame retardant for PBT--Aluminium Hypophosphite (Al (H2 PO2 )3 is kind of new type phosphorus flame retardant, slightly soluble in water, high purity and high decomposition temperature,Highly stable phosphinate based flame retardant for PBT -Aluminium Hypophosphite (Al (H2 PO2 )3 is widely used in engineering plastics, wire and cable compounds.It has the characteristics of good compatibility with PBT resin, high flame retardant efficiency, and minimal impact on mechanical properties. It significantly improves the flame retardant performance of PBT through a triple mechanism of gas-phase flame retardancy, condensed phase carbonization, and droplet suppression, while also possessing anti yellowing and hydrolysis properties, in compliance with international standards such as UL94 and RoHS.Shandong taixin produce two type Highly stable phosphinate based flame retardant for PBT Aluminium Hypophosphite ( Low Sulfate Content,aht-220B ) and regular Aluminium Hypophosphite ( HT-220A) two type Aluminium Hypophosphite (Al (H2 PO2 )3.

Product Introduction:

1. Triple flame retardant mechanism, adapted to PBT combustion characteristics

Aluminum hypophosphite achieves multidimensional flame retardancy for PBT due to its flammability and high risk of melting droplets

Gas phase flame retardant: releases phosphorus containing free radicals (such as PO ·) at high temperatures, captures H · and OH · active groups generated by PBT combustion, inhibits combustion chain reactions, and reduces heat release rate (peak heat release rate can be reduced by more than 45%);

Condensed phase flame retardant: forms a ceramic like carbide layer, blocks oxygen and heat transfer, reduces PBT melt dripping (adding 12% aluminum hypophosphite can reduce the number of melt dripping by 90%);

Smoke suppression and toxicity reduction: Reduce the release of CO and aldehyde toxic gases during combustion, with a smoke density rating (SDR) of ≤ 60, improving fire safety.

2. Excellent compatibility with PBT, ensuring comprehensive performance of the product

Dispersion and processability: After surface modification with stearic acid, it is uniformly dispersed in PBT resin, with a melt index (MFR) fluctuation of ≤± 8%, suitable for high-temperature processing techniques such as injection molding and extrusion (processing temperature ≤ 260 ℃);

Mechanical performance retention rate: PBT composite materials with 10-15% aluminum hypophosphite added have a tensile strength of ≥ 80MPa (reduced by about 10% compared to pure PBT, better than the 20% reduction of traditional flame retardant aluminum hydroxide) and a bending modulus of ≥ 2000MPa, meeting the mechanical requirements of structural components;

Resistance to hydrolysis and yellowing: Stable performance in humid environments (humidity ≥ 85%), no yellowing phenomenon after long-term use, suitable for outdoor and high humidity scenarios.

3. Environmentally friendly and halogen-free, meeting strict standards

Halogen free, low VOC: free of Br and Cl elements, no corrosive gases generated during combustion, VOC content<5ppm, meeting JEDEC J-STD-035 (flame retardant material standard) for the electronics industry and ISO 3795 (combustion characteristic testing) for the automotive industry;

High flame retardant rating: When used alone, adding 12-18% can increase the flame retardant rating of PBT to UL94 V-0 level (0.8mm thickness) and increase the oxygen index (OI) to over 32%.

Physical and Chemical Properties

Key Advantage

High TGA: TGA(1%) ≥310℃

High Stable Quality:Purity mainly stable in 96.0%-97.5%

Application areas:

1. Electronic and electrical components

Connectors and sockets: used for USB interfaces, power sockets, etc., with 10-12% aluminum hypophosphite added, certified UL94 V-0 flame retardant, and meeting CTI (Leakage Traceability Index) ≥ 600V to reduce arc risk;

Coil skeleton and switch components: Utilizing their heat resistance (thermal deformation temperature ≥ 130 ℃) and flame retardancy, they are suitable for high temperature scenarios such as motors and relays.

2. Automotive engineering plastics

Sensor housing and transmission components: such as temperature sensor housing, gearbox components, added with 15% aluminum hypophosphite, passed FMVSS 302 flame retardant test, combustion rate ≤ 40mm/min, and can withstand high and low temperature cycles from -40 ℃ to 120 ℃;

Battery components: New energy vehicle battery box bracket, meets UL94 V-0 flame retardant requirements, and is resistant to electrolyte corrosion (with a performance retention rate of ≥ 95% after soaking in 30% KOH solution for 24 hours).

3. Industrial and Precision Machinery

Gear and bearing cage: PBT modified for industrial transmission gears, with a flame retardant rating of GB/T 2408 V-0 and a 25% improvement in wear resistance (wear amount ≤ 0.05mm ³);

Heat dissipation components: LED lamp base, motor heat dissipation cover, with both flame retardant and thermal conductivity (thermal conductivity ≥ 0.3W/(m · K)).

Packaging :Net weight 25kg/bag, Compound paper-plastic bag and inner aluminum foil

Storage and Attention: Keep in dry, room temperature and moisture proof condition, preventing the heating.

Welcome to order

Choose aluminum hypophosphite to endow PBT engineering plastics with the core competitiveness of "flame retardancy, heat resistance, and environmental protection"! Assist your product in meeting the demands of the high-end market.

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