In the process of continuously upgrading synthetic resins such as polyurethane, polyester and amino resins towards higher performance and functionality, how to precisely introduce the unique properties of organosilicon through chemical bonding into the main chain of the resin, rather than just physical blending, has become the core technical path for material modification. The product we have launched, 28130, a hydroxyl-modified organosilicon oil, as a modified organosilicon oil with hydroxyl groups, demonstrates significant application value in the synthesis of organosilicon-modified polyurethane copolymers and the modification of various resins, providing a precise and efficient reactive modification scheme for the development of high-performance resin materials.


I. Core Physical and Chemical Properties of the Product


Product 28130, a hydroxyl-modified organosilicon oil, is a colorless to slightly yellow, transparent to slightly turbid liquid. Its functionality is two, molecular weight is three thousand, and the hydroxyl value is thirty milligrams of potassium hydroxide per gram. This product is a modified organosilicon oil with hydroxyl groups, designed with a single-end double hydroxyl structure. It has high purity and does not contain any excess unreacted polyethers. It can react with isocyanates to form high-quality organosilicon/polyurethane copolymers. The design of a molecular weight of three thousand provides an appropriate chain segment length, which can effectively exert the hydrophobic and softening properties of organosilicon and maintain good compatibility with various resin systems.


II. Core Reaction Characteristics and Modification Value


The application value of product 28130 lies in its molecular structure's reactive hydroxyl groups. Different from traditional silicon hydroxyl groups, the hydroxyl groups in this product are indirectly connected to the silicon atom through carbon atoms, forming a stable silicon-carbon bond structure. During the reaction and subsequent use, they have higher hydrolysis stability.


This hydroxyl group can react with isocyanate groups, embedding the polymeric silicon-oxygen chain segments chemically into the polyurethane main chain or side chain to form organosilicon-modified polyurethane copolymers. The modification method through chemical bonding does not have the common migration and precipitation problems of physical blending, and the modification effect is stable and long-lasting. The single-end double hydroxyl design enables it to participate in polymerization reactions as a chain extender or copolymer monomer, precisely introducing the softness, hydrophobicity, and lubricity of organosilicon into the target resin, achieving targeted control of material properties.


III. Main Application Areas


Product 28130, with its reactivity and performance-enhancing capabilities, can play an important role in the following key application areas:


1. Synthesis of organosilicon-modified polyurethane resins and emulsions. The product reacts with isocyanates to synthesize organosilicon-modified polyurethane copolymers, suitable for polyurethane coatings, adhesives, and elastomers. The modified polyurethane maintains the original mechanical properties while significantly improving surface hydrophobicity, stain resistance, and hand feel.


2. Modification of polyester and polyurethane acrylate resins. The product can participate in the copolymerization reaction of polyester and polyurethane acrylate resins, introducing organosilicon chain segments into the resin main chain, giving the resin good hand feel, smoothness, and improved wear resistance and anti-sticking properties.


3. Two-component polyurethane varnish and amino varnish. The product is added to the two-component polyurethane or amino varnish system, significantly improving the smoothness, anti-sticking, and surface hydrophobicity of the coating, while improving the leveling and appearance quality.


4. Resin modification agents with high softness requirements. This product is suitable for use as a resin modification agent with high softness requirements, enhancing the softness, tear resistance, lubricity, breathability, compatibility, wear resistance, and hydrophobicity of the synthetic resin. It can give the coating a silky and delicate touch, improving the surface quality of the product, and is suitable for high-end paints, leather coating, and other fields, significantly improving the stain resistance of the coating surface, making oil stains and dust easy to clean.


IV. Usage Suggestions and Process Guidance


As a reactive modifier, the product is recommended to be added during the resin synthesis or curing process to ensure full participation in the chemical reaction rather than simple physical mixture. The addition amount can be adjusted within a wide range according to the target performance requirements: for enhancing the hand feel, 0.2% to 1% is recommended; for anti-stain modification, 2% to 6% is recommended; for comprehensive resin modification, 1% to 6% is recommended. When using the product in synthesizing silicone-modified polyurethane, it can react with isocyanate to form an isocyanate-end-capped prepolymer, and then add polyol for chain extension reaction; it can also be added simultaneously with polyol and undergo a co-polymerization reaction with isocyanate.


V. Packaging Specifications and Storage Conditions


The product, carbon-hydroxyl modified silicone oil 28130, is packaged in 20-liter and 200-liter iron drums. Other specifications can be provided according to customer requirements. The product is sealed and stored in a dry and cool place to avoid contact with acids and alkalis, and to stay away from fire sources. Under the condition of meeting storage requirements and without being opened, the effective storage period is 24 months.


VI. Quality Assurance and Industrial Chain Value


During the production process of the product, 28130, carbon-hydroxyl modified silicone oil, a strict quality control system has been established. Key indicators such as appearance, functionality, molecular weight, and hydroxyl value are tested throughout the process to ensure consistency and reliability between batches. As the demand for high-performance modified resin materials in industries such as polyurethane, coatings, and adhesives continues to grow, product 28130, with its precise single-end double-hydroxyl reaction structure, chemical bonding resulting in long-lasting modification effects, and stable quality performance, is becoming an important reactive modifier option for organic silicone modified resins in the field. It provides strong raw material support for promoting product innovation and technological upgrading in the downstream industries.