In the vast landscape of chemical raw materials, certain compounds stand out for their versatility and critical role across multiple industries. Hydroxyl Silicone Oil, also known by its CAS number 70131-67-8 and often referred to as an OH polymer or hydroxyl-terminated polydimethylsiloxane, is one such indispensable material. As a leading chemical manufacturer and supplier in China, we are proud to offer this high-purity product to meet the evolving demands of global industries.

What is Hydroxyl Silicone Oil?

At its core, Hydroxyl Silicone Oil is a functional silicone polymer characterized by the presence of hydroxyl (-OH) groups at the ends of its molecular chain. This specific chemical structure imparts unique reactivity and properties that differentiate it from other silicone oils. It is a colorless, transparent liquid that exhibits excellent resistance to extreme temperatures, robust electrical insulation capabilities, and remarkable chemical inertness. These characteristics make it a highly sought-after raw material for a variety of sophisticated applications.

Key Properties Driving Industrial Adoption

The appeal of Hydroxyl Silicone Oil lies in its advantageous properties:

  • Reactivity: The terminal hydroxyl groups are highly reactive, allowing the oil to participate in polymerization and cross-linking reactions. This is fundamental for its use in creating silicone rubbers and sealants.
  • Thermal Stability: It can withstand a wide temperature range, typically from -50°C to +250°C, making it suitable for high-performance applications where temperature fluctuations are common.
  • Electrical Insulation: Its dielectric properties are exceptional, providing reliable insulation for electronic components and electrical equipment.
  • Low Surface Tension & Hydrophobicity: These attributes make it an effective surface treatment agent, imparting water repellency and a smooth feel to materials like textiles and leather.
  • Chemical Inertness: It resists degradation from many chemicals, contributing to the longevity and stability of the final products it's incorporated into.

Applications Across Diverse Sectors

The versatility of Hydroxyl Silicone Oil translates into a broad spectrum of applications:

In the silicone rubber industry, it serves as a primary base material for the production of Room Temperature Vulcanizing (RTV) silicone rubbers. These rubbers are essential for manufacturing sealants, adhesives, gaskets, and molds used in construction, automotive, and electronic industries. Buyers looking to purchase silicone rubber raw materials often seek high-quality OH polymer for its crucial role in curing and performance.

For the textile and leather industries, it functions as a finishing agent. It imbues fabrics and leather with a soft touch, improved elasticity, and enhanced sewability. Its hydrophobic nature also provides a degree of water resistance, elevating the quality and functionality of finished goods. Manufacturers and formulators in these sectors frequently inquire about wholesale prices for these finishing agents.

In the electronics sector, its superior insulating and protective qualities make it ideal for potting, sealing, and encapsulating sensitive electronic components. This safeguards devices against moisture, vibration, and thermal stress, ensuring reliability and extending product lifespan. Companies sourcing electronic-grade silicone materials will find this product a valuable addition.

Furthermore, it finds application in building materials as a component in weather-resistant sealants and coatings, offering durability and protection against environmental elements. Its chemical inertness and stability are key advantages in these demanding external applications.

Sourcing from a Reliable China Manufacturer

For businesses seeking to buy Hydroxyl Terminated Silicone Oil, partnering with a reputable manufacturer and supplier in China like NINGBO INNO PHARMCHEM CO.,LTD. ensures access to high-purity products at competitive prices. We understand the importance of consistent quality and reliable supply chains for our B2B clients. Whether you require bulk quantities for industrial production or specialized formulations, our team is dedicated to providing excellent service and tailored solutions. When you need to buy CAS 70131-67-8, consider us your go-to source for quality and value.