Flame Retardant

Phosphorus Flame Retardant (HF-80 / HF-90)

PHOSPHORUS-BASED · INTUMESCENT

Halogen-Free Flame Retardants Engineered for Modern Polymer Applications

As a phosphorus flame retardant supplier, Sychem produces phosphorus-nitrogen synergistic flame retardant systems — built on Ammonium Polyphosphate (APP) and Piperazine Pyrophosphate (PPAP) chemistry — deliver UL94 V-0 performance with significantly lower smoke density, lower toxicity, and lower part density than traditional halogen / antimony systems. Free from RoHS and REACH restrictions, our HF-80 and HF-90 series serve electrical, automotive, EV battery, wire & cable, and construction markets across more than thirty countries.

Certified Performance

Tested and verified across the world’s most demanding polymer flame retardant standards

UL94 V-0
@ 0.75 MM
≥ 250 °C
TGA 1% ONSET
GWIT 750
GLOW WIRE IGNITION
Halogen-Free
ROHS / REACH

Why Phosphorus-Nitrogen Chemistry

Three engineering advantages that explain why P-N intumescent systems are replacing halogen / antimony retardants across global markets

01 / CHAR FORMATION

Intumescent Insulation Layer

On exposure to flame, the system swells into a thick carbonaceous foam that physically insulates the polymer below — interrupting heat and oxygen transfer at the source.

02 / SAFER COMBUSTION

Lower Smoke & Toxicity

Compared to brominated systems, P-N intumescent retardants produce dramatically lower smoke density and zero corrosive halogen acids — critical for cable, transit, and indoor applications.

03 / COMMERCIAL UPSIDE

Lower Density, Lower Cost

Lower specific gravity than mineral or halogen / antimony systems means less weight per part and meaningful cost savings on filled compounds.

HF-80 vs HF-90 — Choose the Right Family

Both series share P-N intumescent chemistry but differ in active substance and best-fit substrate

Property HF-80 Series HF-90 Series
Active SubstancePiperazine Pyrophosphate (PPAP)Ammonium Polyphosphate (APP)
GenerationNew generation, premiumEstablished workhorse
Phosphorus Content19 – 22%21 – 27%
Particle Size5 – 8 μm8 – 14 μm
Decomposition (TGA 1%)≥ 260 – 270 °C≥ 250 °C
MigrationNone — zero migrationLow
Best ApplicationGF-reinforced PP, TPE, TPU, EV componentsCost-effective PP / PE / EVA, electrical housings
Typical Dosage20 – 32 wt%24 – 37 wt%
HF-80 SERIES · PPAP-BASED

Piperazine Pyrophosphate — New-Generation P-N System

Built on PPAP chemistry — a newer generation of halogen-free flame retardant offering excellent retardant efficiency, lower density, higher decomposition temperature for a wider processing window, and zero migration. Suitable for PP, PE, EVA, TPE, TPU and glass-fiber-reinforced thermoplastics.

HF-80 Grades — Technical Specifications
PPAP
Grade P Content Particle Size TGA 1% Characteristics
HF-800A20 – 22%5 – 8 μm≥ 270 °CGeneral-purpose grade for unreinforced PP / PE
HF-800AN19 – 21%5 – 8 μm≥ 270 °CHigh performance-cost ratio grade
HF-800B19 – 21%5 – 8 μm≥ 260 °COptimized for glass-fiber-reinforced PP
HF-802B19 – 21%5 – 8 μm≥ 260 °CExcellent dispersion, smooth-surface PE / TPE
HF-800M7B13 – 15%—≥ 270 °C70% masterbatch with PP carrier — direct injection ready
Dosage Guidelines — HF-80
UL94 RATED
Substrate Resin UL94 Rating Recommended Dosage Recommended Grade
Unreinforced PPV-0 @ 1.5 mm20 – 26 wt%HF-800A / HF-800AN
Unreinforced PP5VA @ 2.0 mm30 – 35 wt%HF-800A / HF-800AN
Glass-Fiber Reinforced PPV-0 @ 1.5 mm20 – 26 wt%HF-800B
PEV-0 @ 1.5 mm28 – 32 wt%HF-802B
TPEV-0 @ 2.0 mm30 – 40 wt%HF-802B
Formulation note: For unreinforced systems, suggest adding 0.2 – 0.4% anti-dripping agent. Glass-fiber-reinforced PP does not require anti-drip additives. Avoid co-loading with calcium carbonate, carbon black, or phthalocyanine green where possible.
HF-90 SERIES · APP-BASED

Ammonium Polyphosphate — Cost-Performance Workhorse

Halogen-free environmentally friendly flame retardant based on Ammonium Polyphosphate (APP) with phosphorus-nitrogen synergism. Operates through char formation and intumescent mechanism, delivering UL94 V-0 at 0.75 mm and UL746C 70 °C × 168 h water immersion performance. The established choice for polyolefin flame retardancy.

HF-90 Grades — Technical Specifications
APP
Grade P Content Particle Size TGA 1% Characteristics
HF-900A21 – 24%10 – 14 μm≥ 250 °CHigh performance-cost ratio, general-purpose
HF-900B24 – 27%10 – 14 μm≥ 250 °CHigh flame-retardant efficiency, suitable for filled resins
HF-900D22 – 25%10 – 14 μm≥ 250 °CSpecifically formulated for high-blackness color resins
HF-902F21 – 24%8 – 11 μm≥ 250 °CFine particle, dark color compounds
Dosage Guidelines — HF-90
UL94 RATED
Substrate Resin UL94 Rating Recommended Dosage Recommended Grade
PP — Light ColorV-0 @ 1.5 mm24 – 30 wt%HF-900A / 900B / 902F
PP — Light Color5VA @ 2.0 mm32 – 37 wt%HF-900A / HF-900B
PP — Dark / BlackV-0 @ 1.5 mm26 – 30 wt%HF-900D / HF-902F
PE — Light ColorV-0 @ 1.5 mm30 – 35 wt%HF-900B
PE — Dark / BlackV-0 @ 1.5 mm32 – 37 wt%HF-900D
Formulation note: Add 0.2 – 0.4% anti-dripping agent to the formula. For co-polypropylene (random or block PP), increase flame retardant dosage by 2 wt% versus homo-polypropylene baseline.
APPLICATIONS

Where These Flame Retardants Are Used

Halogen-free FR systems serving the world’s most demanding polymer markets

Electrical & Electronics
Appliance housings, control boxes, lighting components
New Energy Vehicles
Battery modules, connectors, under-hood parts (HF-80)
Wire & Cable
Halogen-free flame-retardant insulation and jacketing
Construction
Pipes, plates, sheets, panel systems
GF-Reinforced PP
Structural FR compounds (HF-800B specialty)
TPE / TPU
Soft flame-retardant compounds (HF-802B)
Masterbatch
Direct-injection FR masterbatch (HF-800M7B)
Consumer Goods
Light- and dark-color polyolefin parts

Processing & Storage

Standard twin-screw extrusion equipment with optimized temperature windows

HF-90 Extrusion
170 – 200 °C
Suggested blending temp range
HF-90 Injection
170 – 220 °C
Recommended molding temp
HF-80 Max Temp
≤ 230 °C
Wider processing window
Anti-Drip Additive
0.2 – 0.4 wt%
For non-GF-reinforced systems
Compatibility Cautions
AVOID WHERE POSSIBLE
Additive Type Why It Matters
Calcium Carbonate (CaCO₃)May reduce intumescent char integrity and FR efficiency
Barium Sulfate (BaSO₄)Heavy filler dilutes active P-N system; adverse on FR rating (HF-90)
TalcMay interfere with char formation in HF-90 systems
Carbon BlackSpecify HF-900D / HF-902F or HF-802B for dark-color compounds
Phthalocyanine GreenKnown to reduce FR performance — avoid where UL ratings are critical
Standard Packaging
25 kg / bag
Bulk shipping in 20’/40′ containers available. Custom packaging on request for OEM customers.
Storage Conditions
Dry & Shaded
Store in dry place, avoid direct sunlight. Transport classified as general chemicals — no hazardous shipping required.

The Sychem Sourcing Advantage

A trusted partner for halogen-free flame retardant procurement from China

15+
Years of Expertise
Specialized knowledge in polymer additive chemistry and global compliance.
TDS
Verified Documentation
Every grade ships with technical data sheet, COA, REACH, and RoHS support.
FCL
Flexible Order Sizes
From 25 kg trial bags to full container loads, with consolidated shipping options.
24h
Technical Response
Grade selection, formulation guidance, and substitution support within one business day.

Specify the Right Flame Retardant for Your Formulation

Get full technical data sheets, samples, and competitive export pricing. Tell us your polymer, processing method, target UL rating, and color requirement — we will recommend grades worth sampling within one business day.

Request Sample & TDS →

Your Phosphorus Flame Retardant Supplier

Phosphorus flame retardant — halogen-free HF-80 and HF-90 P-N intumescent systems from SYCHEM TECH

SYCHEM TECH is a phosphorus flame retardant supplier based in Shenyang, China, offering halogen-free phosphorus-nitrogen (P-N) intumescent systems based on Ammonium Polyphosphate (APP) and Piperazine Pyrophosphate (PPAP) — the HF-80 and HF-90 series — for UL94 V-0 PP/PE compounds, glass-fiber PP, TPE/TPU, EV battery components, and engineering thermoplastics. As your formulation development partner, we match the right phosphorus flame retardant grade and loading (typically 20–35%) to your resin and UL target, with low smoke, low toxicity, and good mechanical retention. For background, see the overview of ammonium polyphosphate.

Looking for a reliable phosphorus flame retardant with technical support? Tell us your polymer, target UL94 rating, and processing window, and our team will recommend a grade and arrange samples. Explore the parent flame retardants range, our magnesium hydroxide (MDH), and the full functional additives portfolio.

How much phosphorus flame retardant do I need?
Loading depends on the polymer and UL94 target. Our phosphorus flame retardant grades typically reach UL94 V-0 at 20–35% in PP and PE — lower than mineral systems — so mechanical strength and part density are better retained, with low smoke and low toxicity. Share your resin and target rating and we will confirm the right phosphorus flame retardant grade and loading, then send samples and a TDS.