PVC odorless liquid calcium-zinc heat stabilizer is an additive specifically designed for polyvinyl chloride (PVC) products.
I. Key Features
Odorless: This feature provides significant advantages in applications with strict odor requirements, such as food packaging and medical devices. It prevents unwanted odors from affecting the final products, helping improve product quality and safety.
Liquid Form: It offers excellent dispersion, allowing more uniform distribution throughout the PVC resin and ensuring more effective stabilization. Compared with traditional solid heat stabilizers, liquid heat stabilizers are easier to handle, process, and measure during production.
Calcium-Zinc Composite: Calcium-zinc heat stabilizers are environmentally friendly stabilizers that contain no toxic heavy metals such as lead or cadmium, meeting modern environmental protection requirements. The synergistic effects of calcium and zinc effectively improve the thermal stability of PVC and prevent thermal degradation during processing and use.
II. Stabilization Mechanism
Hydrogen Chloride Absorption: During the thermal degradation of PVC, hydrogen chloride gas is released. Metal ions in liquid calcium-zinc heat stabilizers react with hydrogen chloride to form stable metal chlorides, thereby inhibiting further HCl-catalyzed degradation of PVC.
Replacement of Unstable Chlorine Atoms: Unstable chlorine atoms in PVC molecular chains are susceptible to dehydrochlorination under heat. Metal ions in calcium-zinc heat stabilizers can replace these unstable chlorine atoms, forming more stable chemical bonds and improving the thermal stability of PVC.
Free Radical Scavenging: Free radicals are generated during PVC thermal degradation and can accelerate the degradation process. Certain components in liquid calcium-zinc heat stabilizers can capture these free radicals and interrupt radical chain reactions, thereby slowing down the thermal aging of PVC.
III. Application Areas
Pipes: In PVC pipe manufacturing, liquid calcium-zinc heat stabilizers improve heat resistance, weather resistance, and mechanical properties, helping extend the service life of pipes.
Profiles: Used in the production of PVC profiles, including window and door profiles and decorative profiles. They help improve surface quality and enhance aging resistance.
Films: In PVC film production, they effectively prevent thermal shrinkage and aging during processing and use, while improving film transparency and strength.
Wires and Cables: Used in the insulation and sheathing layers of PVC wires and cables to ensure safe operation under high-temperature conditions.
IV. Precautions for Use
Storage Conditions: Store in a cool, dry, and well-ventilated place. Avoid direct sunlight and high-temperature environments. The storage temperature should generally not exceed 35°C.
Compatibility: When using liquid calcium-zinc heat stabilizers, compatibility with other additives must be considered. Different additives may interact with one another and reduce the effectiveness of the heat stabilizer.
Dosage Control: Adjust the dosage of liquid calcium-zinc heat stabilizers according to the specific requirements of PVC products and processing conditions. Insufficient dosage may result in inadequate thermal stabilization, while excessive dosage may negatively affect other product properties.
Processing Conditions: During processing, carefully control temperature and processing time to prevent excessive PVC degradation caused by excessively high temperatures or prolonged processing. Ensure that the heat stabilizer is uniformly dispersed throughout the PVC material.
The PVC liquid calcium-zinc heat stabilizer supplied by Hanyang New Materials is specially designed for the processing of highly transparent and ultra-clear PVC products. It is a high-efficiency, non-toxic, and environmentally friendly liquid PVC heat stabilizer featuring excellent dispersion, good initial thermal stability, and no sulfur-related contamination.
CH417 PVC Liquid Calcium-Zinc Heat Stabilizer features an optimized formulation and is suitable for various static processing methods. Its transparency is comparable to that of 181 Methyl Tin Mercaptide, offering excellent cost-effectiveness.
The product complies with all applicable environmental certifications and standards, including RoHS, REACH, PAHs, and 16P.
For detailed application instructions and recommended formulations for CH417 PVC Liquid Calcium-Zinc Heat Stabilizer, please contact Engineer Zhao at 18934135394.