In the process of the continuous development of high-performance materials such as polyurethane, polyester and epoxy resins towards functionalization and refinement, how to stably introduce the excellent properties of organosilicon into the organic polymer system through chemical bonds has always been the core technical challenge in material modification. The product we have launched, carbon hydroxyl organosilicone oil 28300, with the chemical name of carbon hydroxyl-terminated polydimethylsiloxane, as a modified silicone oil containing carbon hydroxyl active functional groups, demonstrates significant industrial application value in the modification of polyurethane resins, polyester resins, epoxy resins, as well as hydrophilic lubricants and release agents, providing an efficient and stable reactive modification scheme for the development of high-performance materials.


I. Core Physical and Chemical Properties of the Product


Product carbon hydroxyl organosilicone oil 28300 is a colorless transparent liquid. At 25 degrees Celsius, its density is 0.972 to 0.982 grams per cubic centimeter, viscosity is 30 to 50 square millimeters per second, hydroxyl value is 0.160 to 0.200 millimoles per gram, and volatile matter does not exceed 2.00%. The core structural feature of this product lies in the presence of carbon hydroxyl active functional groups at both ends of its molecular chain. This design endows it with unique chemical activity, laying the molecular foundation for it to be used as a reactive modifier.


II. Core Reaction Characteristics and Performance Advantages


The application value of product carbon hydroxyl organosilicone oil 28300 stems from the fundamental difference in carbon hydroxyl and conventional silicon hydroxyl in its molecular structure. Conventional hydroxyl silicone oil forms silicon-oxygen-carbon bonds through reactions with isocyanate groups, which are prone to hydrolysis and breakage in humid environments. In contrast, the hydroxyl in this product is connected to the silicon atom through a stable carbon chain, forming a carbon-silicon bond structure. After reacting with isocyanate groups, carboxyl groups, acid anhydride groups, epoxy groups, etc., the poly-siloxane chain segments can stably exist in the main chain of organic polymers in the form of carbon-silicon bonds, achieving better hydrolysis stability. This characteristic is the core difference between it and traditional hydroxyl silicone oil in terms of long-term durability, fundamentally solving the industry pain point of performance degradation of modified materials in humid environments.


III. Main Application Areas


Product carbon hydroxyl organosilicone oil 28300 can play an important role in the following key application areas, specifically including:


1. Modification of polyurethane resins. Introducing this product into the polyurethane system can significantly improve the flexibility, weather resistance, and surface properties of polyurethane materials. In solvent-free polyurethane coating systems, the modification with hydroxyl silicone oil can effectively enhance the tensile strength and elongation at break of the coating, and with the introduction of poly-siloxane chain segments, the thermal stability of the material is enhanced, the glass transition temperature is reduced, and the cold resistance performance is significantly improved, along with the improvement of hydrophobicity and soft feel.


2. Modification of polyester resins. This product can regulate the hardness and flexibility balance of polyester materials, providing better crack resistance when subjected to external force impacts.


3. Modification of epoxy resins. Adding this product can effectively reduce the internal stress of epoxy resins, improving their crack resistance. When used in electronic packaging materials, the modified epoxy resins can better protect internal electronic components.


4. Hydrophilic lubricants and release agents. This product has good lubrication properties and surface activity, forming a uniform lubricating film on metal and plastic surfaces. It also has the characteristic of easy cleaning, avoiding the problem of traditional silicone oil residue.


IV. Packaging Specifications and Storage Conditions


Product carbon hydroxyl organosilicone oil 28300 is packaged in 25-liter or 200-liter inner-coated iron drums. Each drum has a net weight of 20 kilograms or 195 kilograms. Under room temperature sealed conditions, the validity period is twelve months from the date of production. Before use, customers should carefully read the product information, material safety data sheet and labels, familiarize themselves with the safety information, operation instructions and environmental impact of the product, and wear the corresponding personal protective equipment as required.


V. Quality Assurance and Industrial Chain Value


Product carbon hydroxyl silicone oil 28300 has established a strict quality control system during the production process. It conducts full-process testing on key indicators such as product appearance, density, hydroxyl value, viscosity and volatile matter to ensure consistency and reliability between batches. As the demand for modified additives with both reactive properties and durable stability from downstream industries of high-performance materials such as polyurethane, polyester and epoxy resin continues to grow, this product, thanks to its stable reaction characteristics imparted by carbon hydroxyl, excellent hydrolysis stability brought by carbon-silicon bonds, and wide adaptability for modification, is becoming an important raw material option for the modification of high-performance resins and functional protection in this field. It provides strong raw material support for promoting product innovation and technological upgrading in related industries.