Acrylonitrile Butadiene Styrene Copolymer---High Rubber Powder
Overview
ABS (Acrylonitrile Butadiene Styrene) High-Rubber Powder is a thermoplastic polymer engineered with a higher proportion of polybutadiene rubber compared to standard ABS. This modification significantly enhances its impact resistance and flexibility, making it ideal for applications requiring durability under stress. The material retains the core benefits of ABS, including ease of processing, dimensional stability, and surface finish quality. High-rubber ABS is synthesized through emulsion or mass polymerization, where the rubber phase is dispersed within the rigid SAN (styrene-acrylonitrile) matrix. This structure absorbs and dissipates energy upon impact, reducing brittleness. It is available in powder or granular form for injection molding, extrusion, or compounding.
Physical and Chemical Properties
ABS High-Rubber Powder exhibits a density of 1.04-1.06 g/cm³ and a melting range of 105-125°C, slightly lower than standard ABS due to the rubber content. Its thermal stability allows processing at 200-250°C without significant degradation. The material is insoluble in water but dissolves in organic solvents like acetone, facilitating certain coating applications. Mechanically, it offers tensile strengths of 30-45 MPa and elongation at break exceeding 20%, outperforming conventional ABS in toughness. The rubber phase (typically 15-30% by weight) provides notch sensitivity resistance, critical for parts subject to repetitive stress. Electrical insulation properties and UV resistance can be further enhanced with additives.
Main Applications
The automotive industry employs high-rubber ABS for interior trim, dashboards, and impact-absorbing components due to its ability to meet safety standards without cracking. Electronics manufacturers use it for protective housings, battery cases, and keyboard keys, leveraging its balance of rigidity and shock absorption. Consumer goods like power tool bodies, luggage shells, and toy parts benefit from its durability and moldability. In industrial settings, it is used for conveyor system components and protective guards. Recent innovations include blends with flame retardants for electrical enclosures and glass-fiber reinforcement for structural parts.
Safety and Storage
ABS High-Rubber Powder is non-toxic under normal handling conditions but may release styrene vapors if overheated (>250°C). Adequate ventilation and PPE (gloves, masks) are recommended during processing to minimize dust inhalation. Storage requires dry conditions (<50% humidity) at temperatures below 30°C to prevent clumping or moisture absorption. Disposal should follow local regulations for thermoplastic waste. Incineration in controlled facilities can recover energy, though recycling via pelletization is preferred for sustainability. Suppliers typically provide Material Safety Data Sheets (MSDS) with detailed hazard and first-aid information.
B2B Procurement Guide
When sourcing high-rubber ABS, prioritize suppliers with ISO 9001 certification and batch-to-batch consistency guarantees. Key specifications to verify include rubber content (e.g., 20% vs. 30%), melt flow index (MFI) for process compatibility, and regulatory compliance (e.g., RoHS, REACH). Sample testing for impact strength (Izod or Charpy tests) and thermal aging resistance is advisable. Bulk pricing often drops at order volumes above 5 metric tons, with lead times of 2-6 weeks depending on customization. Regional suppliers in Asia may offer cost advantages, but freight and import duties should be factored into total cost.