Chimassorb 119, with the CAS number 106990-43-6, is a high-quality product available at a low price. It belongs to the class of hindered amine light stabilizers (HALS). These stabilizers are well - known for their excellent performance in protecting polymers from the harmful effects of ultraviolet (UV) radiation. Chimassorb 119 is a solid with a specific chemical structure that allows it to effectively scavenge free radicals generated during the photo - oxidation process. It has a high melting point, which ensures its stability during processing at high temperatures for various polymer applications. The molecular weight of Chimassorb 119 is carefully controlled to optimize its solubility and compatibility with different polymer matrices.
Chimassorb 119 has a wide range of applications in the polymer industry. It is primarily used in polyolefins such as polyethylene (PE) and polypropylene (PP). In PE films, it provides long - term protection against UV degradation, which extends the service life of the films. For example, agricultural films made with PE containing Chimassorb 119 can withstand harsh outdoor conditions for a longer period, protecting crops from excessive sunlight damage. In the case of PP, Chimassorb 119 is used in automotive interior and exterior parts, as well as in consumer goods. It helps to maintain the mechanical properties, color, and appearance of these parts over time, even when exposed to sunlight. Additionally, it can be used in engineering plastics, such as polyamides and polyesters, to enhance their weatherability.
When using Chimassorb 119, it is important to follow the recommended dosage guidelines. The appropriate dosage depends on the type of polymer, the end - use application, and the expected environmental exposure. Generally, for polyolefins, the dosage ranges from 0.1% to 1.0% by weight. It can be added during the polymer compounding process. For example, in an extrusion process, Chimassorb 119 can be dry - blended with the polymer pellets before feeding them into the extruder. In injection molding, it can also be incorporated in a similar way. It is crucial to ensure uniform dispersion of the stabilizer in the polymer matrix to achieve optimal performance. Adequate mixing equipment should be used, and the processing temperature should be carefully controlled to prevent thermal degradation of the stabilizer.
Case 1: Agricultural Films
A large agricultural film manufacturer was facing issues with the rapid degradation of their PE films due to UV exposure. After adding Chimassorb 119 at a dosage of 0.3% by weight during the film - making process, the films showed significant improvement in their weatherability. The films maintained their mechanical strength and transparency for two seasons, compared to the previous films that lasted only one season. This led to increased customer satisfaction and reduced replacement costs for farmers.
Case 2: Automotive Interior Parts
An automotive parts manufacturer was using PP for interior trims. The parts were showing signs of yellowing and embrittlement after a short period of use. By incorporating Chimassorb 119 at a dosage of 0.5%, the parts maintained their original color and flexibility even after long - term exposure to sunlight in a test chamber simulating real - world conditions. This improved the overall quality of the automotive interior and met the high - end aesthetic requirements of the market.
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Este es William, CEO de Zhishang Chemical Co., Ltd.
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