In industrial fields such as defoamers, silicone rubber, textile dyeing and finishing, and powder fire extinguishing agents, the surface properties of materials often determine the performance of the final product. By modifying the surface of ordinary hydrophilic silica with treatment agents such as silane coupling agents, a product with excellent hydrophobic properties and multiple functions - hydrophobic silica - can be produced. The product series of hydrophobic silica launched by our company has undergone special surface treatment, which not only has good hydrophobicity but also possesses functions such as defoaming, thickening, leveling, and anti-sagging. It demonstrates significant industrial application value in industries such as defoamers, liquid silicone rubber, textile dyeing and finishing, lubricating grease, and powder fire extinguishing agents, providing high-performance functional powder materials for customers in various industries.


1. Core Characteristics and Modification Principles of the Product


The hydrophobic silica product is formed by reacting general hydrophilic silica with appropriate conditions and silane coupling agents and other treatment agents, resulting in a solid powder-like silica with a surface grafted with polysilazane. Its hydrophobic contact angle can reach 70 to 150 degrees, not only having good hydrophobicity, but also having functions such as defoaming, thickening, good leveling, and anti-sagging. Similar to other hydrophobic silica products on the market, this series of products has low hygroscopicity, good dispersibility, and the ability to regulate the rheology of polar systems. It can achieve a high addition amount in the liquid system while having a relatively small impact on the viscosity of the system.


2. Series Specifications and Application Positioning of the Product


This series of products has been designed with differentiated surface treatment based on the characteristics of different industries, forming multiple models to meet different application needs.


IOTA GW-100, IOTA GW-150, and IOTA GW-800 are mainly used in defoamers and liquid silicone rubber industries. In defoamers, hydrophobic silica acts as a breaking foam active component, effectively reducing the surface tension of the system, quickly breaking the foam and inhibiting foam regeneration; in liquid silicone rubber, it can play a reinforcing and thickening role. IOTA PG-800 is suitable for defoamers, textile dyeing and finishing, lubricating grease, and other industries. In textile dyeing and finishing, it can give fabrics good hydrophobic finishing effects; in lubricating grease, it can be used as a thickening agent and anti-wear additive, improving the high-temperature resistance and anti-polar pressure resistance of the lubricating grease.


IOTA GF-600 and IOTA SW-350-D are mainly used in defoamers, lubricating grease, and powder fire extinguishing agents. In powder fire extinguishing agents, hydrophobic treatment is a key technology for improving the flowability and moisture resistance of the fire extinguishing agent - the treated hydrophobic silica can give dry powder particles good hydrophobicity and fluidity, preventing the fire extinguishing agent from absorbing moisture and caking during storage, effectively extending the product's shelf life and improving the fire extinguishing efficiency. Other treatment specifications products can also be applied in battery separators, polishing materials, and other industries.


3. Application Value in Multiple Industries


In the defoamers industry, hydrophobic silica reduces the surface tension of the system to achieve rapid defoaming and long-lasting defoaming, and is widely used in foam control in water-based coatings, wastewater treatment, and textile printing and dyeing. In the silicone rubber industry, it can significantly improve the mechanical properties of vulcanized rubber as a reinforcing filler. In the textile dyeing and finishing industry, it gives fabrics good waterproof and anti-stain properties. In the lubricating grease and lubricating oil industry, it acts as a thickening agent and additive to improve product performance. In the powder fire extinguishing agent industry, it is the core hydrophobic treatment component of dry powder fire extinguishing agents. In the unsaturated polyester resin, coatings, and ink industries, it is used as a rheology aid to improve the thixotropy and anti-sagging properties of the system.


4. Usage and Storage Suggestions for the Product


The hydrophobic silica product is a white powder-like solid. During storage and transportation, it is necessary to prevent moisture and avoid contact with acidic and alkaline substances. It should be stored in a cool, dry, and ventilated place, avoiding direct sunlight and high-temperature environments. Similar to other powder products, it is recommended to store them in a sealed package and control the humidity of the storage environment to ensure product quality and performance.


V. Quality Assurance and Industry Value


The product series of hydrophobic silica has established a strict quality control system during the production process. Key indicators such as hydrophobic contact angle, particle size distribution, specific surface area, and surface treatment effect are monitored throughout the process to ensure consistency and reliability between batches. As industries such as defoamers, silicone rubber, textile printing and dyeing, and fire protection materials continue to develop towards higher performance and functionality, the demand for surface-modified silica products with both hydrophobic properties and multiple functions is steadily increasing. This series of products, with their differentiated surface treatment processes, multi-model series design, and wide industry applicability, are becoming an important solution for customers in various fields in the selection of functional powder materials, providing strong raw material support for promoting the improvement of product quality and process innovation in related industries.