YSPP17 is a phosphorus-nitrogen based, halogen-free flame retardant for polypropylene. It is designed for use in homo-polymerization, copolymerization, non-reinforced PP blends, and glass fiber reinforced PP. The product complies with EU RoHS and REACH regulations.
Key Features & Characteristics
- High-Efficiency Intumescent Action: Utilizes a phosphorus-nitrogen (P-N) synergy to create a protective char layer, offering excellent, halogen-free flame retardancy.
- Excellent Fire Safety Rating: Achieves a UL-94 V-0 rating at 1.6 mm in most PP applications while preserving the material’s original mechanical and electrical properties.
- Solves Wick Effect: Effectively mitigates the “wick effect” in glass fiber reinforced PP, enabling it to meet the strict UL-94 V-0 classification.
- Formulation Friendly: Shows excellent compatibility with toughening agents, allowing for impact modification without compromising flame retardant performance.
- Proven Durability: Demonstrates high stability by passing the rigorous Damp Heat Test (85°C / 85% RH), ensuring reliability in harsh conditions.
Recommended Usage & Applications
To achieve a UL-94 V-0 flame retardant classification (at 1.6 mm), the following dosage levels are recommended. The exact concentration should be optimized based on the specific grade of polypropylene and the final product requirements.
- For Homopolymer PP (HoPP): A loading level of 20% to 28% by weight is suggested.
- For Copolymer PP (CoPP) & PP Blends: A loading level of 22% to 30% by weight is recommended.
| Items | 1# | 2# | 3# |
| PP Homopolymer (T30S), % | 46 | —— | 23 |
| PP Copolymer (7726H), % | —— | 46 | 23 |
| YSPP17, % | 24 | 24 | 24 |
| Glass Fiber, % | 30 | 30 | 30 |
| UL94 (1.6mm) | V-0 | V-0 | V-0 |
| Items | 1# | 2# | 3# | 4# |
| PP Homopolymer (T30S), % | 74 | —— | 37 | 50 |
| PP Copolymer (7726H), % | —— | 74 | 37 | —— |
| YSPP17, % | 26 | 26 | 26 | —— |
| DBDPE, % | —— | —— | —— | 22.5 |
| ATO, % | —— | —— | —— | 7.5 |
| Talcum Powder, % | —— | —— | —— | 20 |
| PTFE, % | — | — | — | 0.2 |
| Items | Standards | 1# | 2# | 3# | 4# |
| UL94V | UL94 (1.6mm) | V-0 | V-0 | V-0 | V-0 |
| UL94V after Damp Heat Test (85°C / 85% RH), | UL94 (1.6mm) | V-0 | V-0 | V-0 | V-0 |
| Tensile Strength，MPa | GB/T 1040.5-2008 | 29.14 | 21.34 | 17.86 | 26.73 |
| Flexural Strength，MPa | GB/T 9341-2008 | 45.03 | 34.87 | 26.93 | 44.38 |
| Notched Impact Strength，kJ·m-2 | GB/T 1043.1-2008 | 2.74 | 2.49 | 3.47 | 2.23 |
| Unnotched Impact Strength，kJ·m-2 | GB/T 1043.1-2008 | 38.35 | No break | No break | 13.93 |
| GWFI，℃ | GB/T 5619.10-2017 | 960 | 960 | 960 | 960 |
| GWIT，℃ | GB/T 5619.10-2017 | 800 | 800 | 800 | 625 |
