Achieving optimal visual properties in polymer products requires precise control over material composition and processing conditions. For plastic manufacturers working with polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC), integrating effective additives like Optical Brightener ER-I (CAS 13001-39-3) can significantly enhance product aesthetics. This technical guide, provided by a leading chemical manufacturer, aims to equip R&D scientists and processing engineers with the knowledge needed to effectively utilize Optical Brightener ER-I and procure it efficiently.

Optical Brightener ER-I is a fluorescent whitening agent that operates by converting UV light into visible blue light, thereby masking yellowness and increasing perceived whiteness. Its application in polymers is primarily to improve the brightness and vibrancy of the final product. Key properties relevant to polymer processing include its physical form (yellowish-green powder), high purity (≥99%), and a melting point of 229-231°C, which dictates its thermal stability during processing.

Recommended Dosage and Incorporation:

The effective concentration of Optical Brightener ER-I typically ranges from 0.02% to 0.08% by weight of the polymer. The exact dosage depends on factors such as the specific polymer type, the presence of other additives (like pigments or fillers), and the desired degree of whiteness. For incorporation, the brightener can be added directly during compounding. Masterbatches containing Optical Brightener ER-I are also an excellent option for ensuring homogeneous dispersion and precise dosing, especially for smaller-scale operations. Purchasing from a supplier that offers customized masterbatches can streamline this process.

Processing Considerations:

Optical Brightener ER-I generally exhibits good thermal stability, making it suitable for standard processing temperatures encountered in PE, PP, and PVC extrusion and injection molding. However, it is always advisable to conduct pilot tests to confirm compatibility and optimal processing parameters for specific polymer grades and processing equipment. High processing temperatures or prolonged residence times could potentially lead to degradation, although ER-I is known for its relatively good resistance.

Benefits in Polymer Applications:

  • Enhanced Whiteness and Brightness: Provides a clean, vibrant appearance, making products more attractive to consumers.
  • Improved Visual Appeal: Masks inherent yellowness in polymers, crucial for high-quality plastic goods.
  • Good Fastness Properties: Offers satisfactory lightfastness and sublimation fastness, ensuring the effect is durable.
  • Cost-Effectiveness: High efficacy at low concentrations makes it an economical choice for product enhancement.

Sourcing and Technical Support:

For manufacturers looking to buy Optical Brightener ER-I, it is essential to partner with a reliable supplier. NINGBO INNO PHARMCHEM CO.,LTD., as a dedicated manufacturer, provides not only the product itself but also comprehensive technical support. Our team can assist with dosage recommendations, processing advice, and sourcing strategies. We offer competitive pricing for bulk purchases and can provide samples for your R&D departments. Contact us to learn more about how Optical Brightener ER-I can elevate your polymer products.