For procurement managers and R&D scientists in the chemical industry, selecting the right crosslinking agent is critical for product performance and manufacturing efficiency. Di(tert-butylperoxyisopropyl)benzene (BIPB), identified by CAS number 2212-81-9, has rapidly gained prominence as a high-performance organic peroxide. This guide aims to provide essential information for understanding BIPB, its applications, and how to effectively source it, especially from leading suppliers in China.

What is BIPB? Chemical Profile and Properties

BIPB is a bifunctional organic peroxide known for its effectiveness as a crosslinking agent in a wide variety of polymers. Its chemical formula is C20H34O4, with a molecular weight of approximately 338.5 g/mol. Key properties include:

  • Appearance: Typically a white to pale yellow powder or flake.
  • Melting Point: Generally in the range of 40-50°C.
  • Active Oxygen Content: Approximately 9.08-9.45%, indicating high crosslinking potential.
  • Decomposition Characteristics: BIPB has a 10-hour half-life temperature around 114°C, and a 1-minute half-life temperature around 156-185°C, offering a broad processing window.
  • Solubility: It is insoluble in water but soluble in common organic solvents.

Compared to traditional agents like Dicumyl Peroxide (DCP), BIPB offers a significant advantage: its decomposition products are less odorous and less toxic, making it an environmentally friendly and safer choice.

Key Applications of BIPB

The versatility of BIPB allows it to be used across numerous polymer sectors. Its primary role is to create cross-links within polymer chains, enhancing properties such as thermal stability, mechanical strength, chemical resistance, and elasticity.

  • Rubber and Elastomers: BIPB is highly effective for crosslinking EPDM, silicone rubber, hydrogenated nitrile rubber (HNBR), and fluororubbers. It improves compression set resistance and thermal aging properties, crucial for automotive components, seals, and gaskets.
  • EVA Foam: In the production of Ethylene-Vinyl Acetate (EVA) foam, widely used in footwear midsoles and sporting goods, BIPB ensures uniform cell structure, good resilience, and minimal shrinkage.
  • Polyolefins: It can also be used for crosslinking polyethylene (PE) and polypropylene (PP), enhancing their performance in wire and cable insulation and other demanding applications.
  • Other Polymers: BIPB is also applicable to chlorinated polyethylene (CPE), polyurethane rubbers, and various specialty elastomers.

Safety and Handling Considerations

As an organic peroxide, BIPB requires careful handling and storage. It should be stored in a cool, dry, well-ventilated area, away from heat sources, direct sunlight, acids, alkalis, and reducing agents. The self-accelerating decomposition temperature (SADT) needs to be considered, and recommended storage temperatures are typically below 30°C. Always refer to the Safety Data Sheet (SDS) provided by the BIPB manufacturer for detailed safety guidelines.

Sourcing BIPB: Partnering with Chinese Manufacturers

For companies looking to purchase BIPB, China offers access to a highly competitive market with numerous reliable suppliers. When selecting a BIPB supplier, consider factors such as purity levels (e.g., 96% or 97%), packaging details, and the supplier's track record for quality and consistency. Reputable suppliers will provide comprehensive product data sheets and Certificates of Analysis (CoA). To obtain the best BIPB price, it is advisable to compare quotes from several qualified manufacturers and inquire about bulk purchase discounts.

NINGBO INNO PHARMCHEM CO.,LTD. stands as a premier supplier, offering high-grade BIPB with strong technical support. Engaging with experienced Chinese chemical suppliers ensures you receive a high-quality product that meets your specific application requirements.