Clariant Red Phosphorus HB 400 Catalyst

Features Of Clariant Red Phosphorus HB 400 Catalyst

1. High thermal stability suitable for demanding high-temperature polymer processing conditions.

2. Low volatility and minimal phosphine gas emission during compounding and extrusion.

3. Excellent dispersion performance in engineering thermoplastics including polyamides and polyesters.

4. Halogen-free flame retardant catalyst enabling compliance with RoHS and REACH regulations.

5. Consistent batch-to-batch performance ensured through stringent Clariant quality control protocols.

Typical Applications Of Clariant Red Phosphorus HB 400 Catalyst

1. Flame-retardant polyamide 6 and polyamide 66 compounds for automotive under-hood components.

2. Enhanced fire-safe engineering plastics used in electrical and electronic connectors.

3. High-performance flame-retardant polybutylene terephthalate (PBT) for industrial housings.

4. Thermoplastic composites requiring UL 94 V-0 rating at thin-wall sections.

Specifications Of Clariant Red Phosphorus HB 400 Catalyst

Clariant Red Phosphorus HB 400 Catalyst – Frequently Asked Questions (FAQ)

Q1: What is the primary function of Clariant Red Phosphorus HB 400 in polymer systems?

A: Clariant Red Phosphorus HB 400 is a halogen-free flame retardant catalyst designed to promote char formation and suppress smoke generation during thermal decomposition of engineering thermoplastics—particularly polyamide (PA6, PA66) and polybutylene terephthalate (PBT).

Q2: How does HB 400 differ from conventional red phosphorus grades?

A: HB 400 features a proprietary surface treatment that enhances thermal stability, reduces hygroscopicity, and improves compatibility with polar engineering resins—resulting in better dispersion, reduced corrosion potential, and improved long-term color stability compared to untreated or minimally stabilized red phosphorus.

Q3: Is HB 400 suitable for applications requiring regulatory compliance for food contact or electronics?

A: HB 400 is formulated for high-purity performance and has been evaluated in systems targeting UL 94 V-0 and glow-wire ignition temperature (GWIT) compliance. While it is not inherently certified for food contact or RoHS-exempted electronics use, its low volatility and controlled phosphorus release profile support qualification efforts in regulated end-use segments—subject to full system validation.

Q4: What processing considerations should be taken when compounding with HB 400?

A: Due to its reactivity at elevated temperatures, HB 400 should be introduced downstream in twin-screw extrusion or added during final melt mixing under inert atmosphere where feasible. Avoid prolonged residence time above 280 °C in oxygen-rich environments to maintain optimal performance and minimize discoloration.

Q5: How is HB 400 typically dosed in flame-retardant formulations?

A: Dosage depends on formulation requirements and target flame performance, but HB 400 is generally used at low concentrations—typically ranging from 0.1% to 2% by weight—in combination with synergists such as melamine polyphosphate or metal phosphinates to achieve balanced flame retardancy, mechanical retention, and processability.