Overview
Chain extender masterbatch is a concentrated additive designed to repair broken polymer chains in recycled or thermally degraded plastics. It reacts with functional groups (e.g., carboxyl or hydroxyl) to increase molecular weight, viscosity, and mechanical performance. Commonly used in PET, PA, and PLA processing, it addresses challenges like brittleness and poor melt strength in recycled materials. The masterbatch format ensures uniform dispersion during extrusion or injection molding, typically added at 1–5% loading rates.
Physical and Chemical Properties
The masterbatch appears as homogeneous pellets, often carrier-resin-based (e.g., LDPE or LLDPE) for easy blending. Active components include epoxy-based compounds (e.g., glycidyl methacrylate) or styrene-acrylic copolymers. Key reactions involve chain coupling through epoxy-carboxyl reactions, which occur at processing temperatures (180–280°C). The additive is thermally stable under recommended conditions but may crosslink excessively if overheated, leading to gel formation.
Main Applications
Primary use is in rPET for food packaging and fiber production, where it restores intrinsic viscosity (IV) to near-virgin levels. Automotive applications include reinforced polyamide parts, improving impact resistance after recycling. In film extrusion, it reduces die drool and enhances bubble stability. Emerging uses include 3D printing filaments to counteract degradation during repeated processing. Technical grades are tailored for specific polymers, with some variants offering UV stabilization or hydrolysis resistance.
Safety and Storage
While generally classified as non-hazardous, processing may release volatile organic compounds (VOCs). Use local exhaust ventilation near hoppers and extruders. Storage requires moisture-proof packaging to prevent premature reactions. In case of dust exposure during handling, standard PPE (gloves, goggles) is advised. Shelf life is typically 12 months in unopened containers. Disposal follows regional regulations for polymer additives—incineration with energy recovery is often preferred.
B2B Procurement Guide
Evaluate suppliers based on technical support (e.g., rheology testing reports) and batch consistency. For rPET applications, verify FDA/EU compliance if used in food contact materials. Request samples for trial runs under actual production conditions. Bulk pricing tiers usually start at 500kg orders. Leading manufacturers include Clariant, BASF, and local specialists like Suzhou Polymate. Logistics should avoid high-temperature transit to prevent masterbatch agglomeration.
Related Manufacturers
- 主营：POE弹性体、pp阻燃剂、pp流动剂、PP阻燃母粒、塑料抗氧剂、PA尼龙增韧剂、PBT/PET增韧剂、PP聚丙增韧剂、POE塑料原料
- 主营：镭雕粉、镭雕助剂、阻燃剂、镭雕母粒、阻燃母粒、抗滴落剂、增韧剂、润滑剂、相容剂、成核剂、抗氧化剂、磷酸酯类阻燃剂、开口爽滑剂、紫外线吸收剂
- 主营：PVDF、PTFE、PFA、扩链剂母粒、SURLYN沙林、EVA、PA6、PA66、PC、PCTG、PEBA、ASA、PTB、PPO、LCP、PCTA、PETG、POM、EAA、特种工程塑料、热塑性弹性体、合金塑料、通用塑料
- 主营：塑料增亮剂、塑料防雾剂、防雾滴母料、pp阻燃母粒、pe开口母粒、防静电母粒、抗静电母粒、PP降温母粒、气相防锈母粒、塑料防锈母粒、爽滑开口母粒、pe阻燃母粒、abs阻燃母粒、聚丙烯降温母粒、塑胶增光剂、塑料增光剂、增光增亮剂、pe薄膜阻燃剂、塑料除味剂、塑料开口母料、塑料润滑光亮剂、增韧母料、防老化母料、橡胶增光剂
- 主营：阻燃剂、紫外线吸收剂、光亮剂、成核剂、增透剂、塑料增白剂、溶剂除味剂、树脂去黄剂、pp增透剂、塑料除味剂、pp除味剂、pvc阻燃剂
- 主营：甘氨酸、阻燃剂、胶黏剂、蒽甲酸、退除剂、中性红、3282-24-4、肉桂醛、退镍液、乙氧基、2768-02-7、阻燃毯、7377-08-4、4865-84-3、草酸铜、抛光盐、5471-63-6、戊二酸、插入管、丙二胺、碳化硼、蓝钨粉、硫酸镝、2799-16-8、二氨基
- 主营：分散剂、消泡剂、阻燃剂、色母粒、扩链剂、碳黑、颜料、钛白粉、抗氧剂、光稳定剂、紫外线吸收剂、改性塑料、成核剂、光引发剂、抗静电剂、润滑剂
- 主营：环保发泡剂母粒、特种发泡剂母粒、扩链剂、发泡成核剂
- 主营：PE粉、ABS、液体橡胶、增韧母粒、丁腈颗粒、聚乙烯、PC、HDPE、PA6、PA66尼龙原料、SEBS、PVC、TPE、PMMA、PCTA、LDPE、LLDPE
- 主营：进口滑石粉、硫化锌、加工助剂PPA、食品级扩链剂、玻璃微珠、PETS、白艳华碳酸钙、日本碳酸钙、进口碳酸钙、白石碳酸钙、食品级碳酸钙
- 主营：回收油墨、收购颜料、香精香料、固体液体、防水材料、回收颜料、松香树脂、回收染料、工助剂溶剂、回收化工原料、回收塑料助剂、回收日化原料、回收橡胶助剂、回收食品添加剂