In the world of chemical additives, optical brighteners are essential for enhancing the visual appeal of materials by increasing their perceived whiteness and brightness. Among the most effective and widely utilized is Optical Brightener OB-1 (CAS 1533-45-5). As a premier manufacturer and supplier, we aim to provide a thorough understanding of this crucial product, covering its key properties, diverse applications, and the importance of reliable sourcing for businesses. This knowledge empowers purchasing managers and R&D scientists to make informed decisions when looking to buy Optical Brightener OB-1.

Optical Brightener OB-1, chemically known as 2,2'-(vinylenedi-p-phenylene)bisbenzoxazole, is a highly efficient fluorescent whitening agent. Its primary function is to absorb ultraviolet light (typically in the 340-380 nm range) and re-emit it as visible blue light. This emitted blue light compensates for any yellow cast in the material, resulting in a brighter, whiter appearance. With a high melting point (typically 352-358°C) and excellent thermal stability, OB-1 is particularly suited for high-temperature polymer processing applications, a key differentiator from other brighteners. Its excellent light fastness and resistance to chlorine bleaching further enhance its utility across various demanding environments.

The versatility of Optical Brightener OB-1 is evident in its wide range of applications. It is extensively used in the whitening of synthetic fibers such as polyester and nylon, where its thermal stability during melt spinning is invaluable. In the plastics industry, OB-1 is incorporated into a multitude of polymers including polypropylene (PP), polyethylene terephthalate (PET), rigid polyvinyl chloride (PVC), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polycarbonate (PC), and ethylene-vinyl acetate (EVA) copolymers. Its ability to provide a brilliant, neutral white cast and enhance color vibrancy makes it a preferred additive for products requiring superior aesthetic appeal.

For manufacturers, understanding the recommended dosage is critical for achieving optimal results. Typically, for plastics, the dosage ranges from 0.005% to 0.05% by weight of the polymer. For polyester fibers, recommended levels are often between 75-300g per 1000 kg of material. When sourcing, it is vital to partner with a reputable supplier in China that guarantees high purity and consistent quality. The price of Optical Brightener OB-1 can vary, but investing in a high-quality product from a reliable source ensures performance and avoids potential processing issues or batch inconsistencies.

As a leading chemical producer, we are committed to delivering Optical Brightener OB-1 that meets the highest standards. Our robust manufacturing processes and stringent quality control ensure that you receive a product that performs reliably. We understand the importance of timely delivery and competitive pricing for our B2B clients. If you are seeking to improve the whiteness and brilliance of your plastic or textile products, we encourage you to contact us for a quote on Optical Brightener OB-1. Partner with us for your chemical additive needs and experience the advantage of quality and reliable supply.