During the mixing process of high-temperature vulcanized silicone rubber (HTV) and room-temperature vulcanized silicone rubber (RTV), the "structurization" phenomenon brought by the silica reinforcement system has long been a core technical problem that has plagued the industry. The active silicon hydroxyl groups on the surface of the gas-phase silica have a physical and chemical interaction with the silicone rubber molecular chains, causing the rubber to gradually harden and lose its plasticity during storage, which seriously affects the processing fluidity and product quality. Our company's product, active hydroxyl silicone oil 1203A, as a high-activity structural control agent specifically designed for the silicone rubber system, demonstrates significant industrial application value due to its active content not lower than 9% (equivalent to hydroxyl content), ultra-low viscosity not exceeding 10 square millimeters per second, and high purity quality. In the mixing and processing of silicone rubber, it shows important industrial application value.


I. Core Physical and Chemical Properties of the Product


Product active hydroxyl silicone oil 1203A is a colorless transparent liquid with a viscosity not exceeding 10 square millimeters per second at 25 degrees Celsius. The active content is not lower than 9% (equivalent to hydroxyl content). This product is a highly efficient structural control solution specifically developed for the silicone rubber system. Its parameters have been precisely optimized: the active content is at the industry-leading level, providing sufficient reaction sites for the active hydroxyl groups on the surface of silica to react with; the viscosity is controlled at an extremely low level, enabling it to quickly penetrate and uniformly disperse in the silicone rubber system during mixing, and to fully contact with silica fillers, significantly improving the efficiency of structural control. Its low viscosity characteristic ensures good operational convenience during processing, facilitating measurement and mixing.


II. Core Performance Advantages and Mechanism of Action


The core application value of product active hydroxyl silicone oil 1203A stems from its end hydroxyl group's efficient passivation effect on the active sites on the surface of gas-phase silica. During the mixing of silicone rubber, the active silane groups on the surface of silica will interact with the silicone rubber molecular chains to form hydrogen bonds, resulting in a physical and chemical bond, making it difficult for silica to be uniformly dispersed, causing the rubber to gradually harden during storage. This product's molecular ends' active hydroxyl groups can preferentially react with the hydroxyl groups on the surface of silica or form hydrogen bonds, effectively passivating the active sites on the filler surface, thereby inhibiting the formation of hydrogen bonds between silica particles and promoting the uniform dispersion of silica in the silicone rubber, reducing the tendency of silica agglomeration.


In terms of structurization inhibition effect, studies have shown that the hydroxyl silicone oil has a better inhibitory effect on silicone rubber structurization than other types of structural control agents such as methoxy silicone oil and dimethyl diethoxy silicone oil, effectively reducing the structurization degree of the mixed rubber and extending the safe storage time of the rubber. Its dosage of about six parts can achieve a good inhibitory effect. Its high active content gives it excellent structural control efficiency, enabling it to achieve ideal results with a lower addition amount, while its ultra-low viscosity characteristic ensures its rapid dispersion during mixing, providing convenience for subsequent processing.


III. Main Application Areas


Product active hydroxyl silicone oil 1203A, with its high activity and low viscosity characteristics, can play an important role in the following key application areas:


1. Structural control agent for silicone rubber mixing. This product is an important structural control agent for high-temperature vulcanized silicone rubber such as methyl vinyl silicone rubber and room-temperature vulcanized silicone rubber, effectively inhibiting the structurization caused by silica and significantly reducing the Marni viscosity of the mixed rubber, extending the safe storage time of the rubber, improving processing fluidity, and being particularly suitable for high-end silicone rubber products with high requirements for product transparency and mechanical properties.


2. Enhancer for improving silicone rubber processing efficiency. Its low viscosity characteristic enables it to easily disperse during mixing, quickly mixing with silica and silicone rubber raw materials, reducing mixing time and energy consumption, and improving production efficiency.


IV. Packaging Specifications and Storage Conditions


Product Active Hydroxy Silicone Oil 1203A is packaged in 200-kilogram iron drums. It should be placed in clean and dry containers and stored in a well-ventilated and dry warehouse to avoid contact with acids and alkalis.


V. Quality Assurance and Industrial Chain Value


During the production process of product active hydroxy silicone oil 1203A, a strict quality control system has been established. Key indicators such as product appearance, viscosity, and active content are tested throughout the process to ensure consistency and reliability between batches. As silicone rubber products continue to develop towards higher value and precision, the demand for structural control agents with both high activity and convenient processing has steadily increased. This product, with a high active content of no less than 9% and an ultra-low viscosity of no more than 10 square millimeters per second, and stable quality assurance, is becoming an important structural control agent option in the silicone rubber mixing and processing field. It provides strong raw material support for promoting the improvement of product quality and processing efficiency optimization in related industries.