In the process of continuous upgrading of the polyurethane resin, polyester resin and coating industries towards high-performance and functionalization, functional intermediates with both reactive properties and excellent characteristics of organosilicon are becoming the key to achieving breakthroughs in material performance. The product 5866, a dual-alcohol hydroxyl-end-capped long-chain alkyl organosilicone oil launched by our company, as an organosilicon prepolymer with a single-end dual-hydroxyl end-capping, demonstrates significant industrial application value in the synthesis of silicone-modified polyurethane resins and emulsions, organosilicon-modified polyester resins, two-component baking paints, etc., providing an efficient modification solution for the development of high-performance resin materials.


I. Core Structural Characteristics and Physical Properties of the Product


Product 5866, a dual-alcohol hydroxyl-end-capped long-chain alkyl organosilicone oil, is a colorless to pale yellow transparent liquid with an average molecular weight of approximately 4250, a hydroxyl content of 0.8%, and a viscosity of 800 to 1800 centipoises at 25 degrees Celsius, and a solid content of 96.00 ± 3.00%. The core structural innovation of this product lies in its single-end dual-hydroxyl molecular design: one end of the molecular chain is capped with two alcohol hydroxyl groups, and the other end is a long-chain alkyl-modified inert silicon oxide chain segment. This structure makes it a typical single-end dual-hydroxyl-end-capped organosilicon prepolymer, capable of undergoing efficient copolymerization reactions with isocyanate groups and carboxyl groups, introducing the organosilicon chain segment into the resin molecular structure.


II. Core Reaction Characteristics and Functional Advantages


The application value of product 5866 stems from its unique reaction characteristics and modification functions conferred by its single-end dual-hydroxyl structure. The hydroxyl groups in this product are linked to carbon atoms, belonging to carbon-hydroxyl organosilicone oil, and have a significantly higher reaction activity than traditional hydroxyl organosilicone oils, almost equivalent to conventional primary hydroxyl groups, capable of undergoing efficient reactions with various organic resin functional groups such as isocyanate groups and carboxyl groups.


The introduced organosilicon chain segments enhance the performance of resins or coatings in multiple aspects: Firstly, significantly improving the high wear resistance of resins or coatings, extending their service life; Secondly, providing a good hand feel and smoothness, enhancing the tactile experience of the final product; Thirdly, providing good anti-stick, anti-fouling and anti-daubing properties, forming a special protective layer on the material surface, effectively preventing dust and stains from adhering, and reducing the damage caused by graffiti to the surface. Additionally, this product has good compatibility with various resins, its low surface tension characteristic can promote leveling and flow, helping to form a more uniform and flat surface in the production of coatings and coatings.


III. Wide Application Areas and Usage Methods


Product 5866, with its high reaction activity with isocyanate groups and carboxyl groups, plays an important role in the following key application areas, specifically:


1. Synthesis of silicone-modified polyurethane resins and emulsions. In the synthesis of silicone-modified polyurethane resins, this product can react with isocyanates to form an isocyanate-end-capped prepolymer, followed by a chain extension reaction with a polyol; it can also be added simultaneously with the polyol for copolymerization. Generally, it reacts with MDI and TDI at 85 degrees Celsius, and with IPDI at around 90 degrees Celsius. Through this route, silicone-modified polyurethane resins have wide applications in coatings, adhesives, elastomers, etc.


2. Modification of polyester, polyurethane and polyurethane acrylate resins. This product can undergo copolymerization with carboxyl groups, introducing the organosilicon chain segment into the main chain of polyester or polyurethane acrylate resins, improving the flexibility, surface properties and durability of the resins.


3. Modification of two-component PU baking paint and amino baking paint. In two-component PU or amino varnish systems, this product can be directly added to the main resin and uniformly dispersed, effectively reducing the surface tension of the paint film, improving the leveling property and glossiness, while enhancing the hardness, wear resistance and anti-fouling performance of the paint film.


IV. Packaging Specifications and Storage Conditions


The product, 5866, a dual-alcohol hydroxyl single-end capped long-chain alkyl silicone oil, is packaged in 25-kilogram plastic drums or 200-kilogram iron drums. It is placed in clean and dry containers and stored in a ventilated and dry warehouse. This product is transported as a non-hazardous item and has a shelf life of one year under the conditions of compliance with storage requirements and unopened state.


V. Quality Assurance and Industrial Chain Value


During the production process of this product, a strict quality control system has been established. Key indicators such as product appearance, hydroxyl content, average molecular weight, viscosity and solid content are monitored throughout the process to ensure consistency and reliability between batches.


As the demand for high-performance and multi-functional resin materials in industries such as coatings, adhesives and elastomers continues to grow, this product, with its high reactivity due to the single-end dual hydroxyl group and the multi-dimensional performance enhancement brought by the organic silicon chain segments, as well as its stable quality performance, is becoming an important raw material option for the modification of polyurethane and polyester resins in the field of polymer modification, providing strong raw material support for promoting product innovation and technological upgrading in related industries.