Product Introduction of Hydrophobic Silica by Shandong Zhonglian Chemical Co., Ltd. I. Product Overview This product is a high-performance hydrophobic silica independently developed by Shandong Zhonglian Chemical Co., Ltd. It is a new type of functional material custom-developed to address the core pain points in multiple industries such as coatings, rubber, pharmaceuticals, and daily chemicals: "poor dispersibility, insufficient stability, and single functionality of traditional silica caused by strong hydrophilicity". Relying on advanced gas phase/precipitation production processes and precise surface modification technology, the product not only has excellent hydrophobic and moisture-resistant properties but also possesses outstanding dispersibility, reinforcing properties, and stability, which can significantly improve the quality of downstream products. Currently, it is widely used in industrial coatings, synthetic rubber, pharmaceutical excipients, daily chemical products and other fields, and is exported to many countries and regions such as Europe, Southeast Asia, and the Middle East, winning high recognition from customers at home and abroad. II. Core Product Advantages 1. Superb Hydrophobic and Moisture-Resistant Performance The product undergoes surface treatment through a special silane modification process, forming a stable hydrophobic group structure with a contact angle of 110°-150°, which provides excellent waterproof and moisture-resistant effects. It can effectively prevent moisture adsorption and maintain powder fluidity and product stability even in high-humidity environments, fundamentally solving the problem that traditional hydrophilic silica is prone to moisture absorption and agglomeration, which affects the performance of downstream products. It is especially suitable for production and storage scenarios in humid environments. At the same time, it has good high and low temperature resistance (stable operation at -50℃-200℃) and can adapt to complex processing and application environments. 2. High Purity and Multi-Scenario Adaptability Strictly adhering to material standards for different industries, the product has a purity of over 99.5% and extremely low impurity content, with heavy metal (lead, arsenic, mercury, etc.) content ≤ 10ppm, which can meet the usage requirements of industrial, pharmaceutical, food and other scenarios. It fully complies with the national standard GB/T 20020-2013 "Fumed Silica" and international standards such as USP (United States Pharmacopeia) and EP (European Pharmacopoeia). The entire production process is completed in GMP-certified workshops and ISO Class 8 clean workshops. A full-chain quality control system has been established from raw material selection (high-purity quartz sand is used) to finished product delivery, ensuring the safe adaptability of the product in different fields. 3. Excellent Dispersibility and Reinforcing Performance Relying on precise particle size control (primary particle size 5-50nm, agglomerate particle size customizable) and surface modification technology, the product has excellent dispersibility in both organic and inorganic phase systems, is not easy to agglomerate, and its dispersion efficiency is more than 30% higher than that of traditional products. In the synthetic rubber field, after addition, it can increase the tensile strength of rubber by 25%-40% and tear strength by 30%-50%, significantly enhancing the mechanical properties of the product; in the coating field, it can effectively prevent pigment sedimentation, improve leveling, and enhance the scratch resistance and weather resistance of the coating. 4. Full-Dimensional Customization Capability It supports full-dimensional customization services, and can customize hydrophobicity (contact angle adjustable from 80° to 150°), particle size distribution (primary particle size 5-50nm, agglomerate particle size 1-10μm), and type of surface modifier (methylsilane, aminosilane, epoxy silane, etc.) according to the needs of different industries. Based on the process characteristics of different fields such as coatings, rubber, pharmaceuticals, and daily chemicals, it provides personalized solutions. For example, it customizes low-heavy-metal glidant-grade products for the pharmaceutical industry and high-dispersibility anti-settling-grade products for the coating industry. 5. Full-Lifecycle Service Guarantee It provides "pre-sales, in-sales, and after-sales" full-lifecycle technical support services. Pre-sales, 3-5 samples with different parameters can be provided for customers to test according to their needs, and a professional technical team is equipped to provide application scheme design; in-sales, technical personnel can be dispatched to guide key links such as feeding ratio and dispersion process on site; after-sales, a 24-hour response mechanism is established to provide rapid solutions to problems such as dispersion difficulties and performance optimization during product application, ensuring the maximum realization of product value. III. Production Strength Guarantee Shandong Zhonglian Chemical Co., Ltd. has been deeply engaged in the silica material industry for more than 30 years. As a national high-tech enterprise and a "Specialized, Refined, Differential and Innovative" enterprise in Shandong Province, it provides a solid guarantee for product quality. The company has 20 invention patents and 5 utility model patents, and has built a leading domestic gas phase and precipitation method hydrophobic silica production base with an annual output of 10,000 tons. Equipped with advanced testing equipment such as atomic absorption spectrophotometers, laser particle size analyzers, and surface tension meters, it has established 32 full-process testing procedures covering key links such as raw material purity testing, intermediate product hydrophobicity testing, and finished product dispersibility testing. It has obtained ISO9001 quality management system, ISO14001 environmental management system, OHSAS18001 occupational health and safety management system, and GMP certification, realizing full-chain standardized control from R&D, production to quality inspection. IV. Packaging and Transportation Specifications 1. Standard Packaging Specifications Adopting a standardized layered packaging design, it provides multiple specification options: 25kg/bag (inner PE vacuum bag + outer kraft paper composite woven bag), 500kg/big bag (inner PE film + outer reinforced woven bag). At the same time, it can provide tank truck transportation solutions according to customers' bulk order needs, meeting the needs of different order quantities and application scenarios. 2. Professional Moisture-Proof Protection Design In view of the hydrophobic properties and storage needs of the product, a dual moisture-proof protection scheme is adopted: Scheme 1 is inner vacuum PE bag + middle aluminum-plastic composite film + outer wear-resistant woven bag; Scheme 2 is inner inert gas-filled PE bag + outer anti-static woven bag. It can effectively isolate moisture, oxygen and dust, preventing the product from absorbing moisture or being contaminated during transportation and storage. 3. Storage and Transportation Requirements - Storage conditions: Should be stored in a cool, dry and well-ventilated airtight warehouse, avoiding direct sunlight, rain and proximity to heat sources. The relative humidity of the warehouse should be controlled below 60%; - Shelf life: 36 months under standard storage conditions; - Transportation attribute: The product is a non-hazardous chemical and can be globally delivered through multiple transportation methods such as sea freight, land freight and air freight. During transportation, extrusion, collision and rain soaking should be avoided. 4. Standardized Labeling Each batch of product packaging is strictly labeled with information such as product name, model, hydrophobicity, particle size, net weight, production batch number, production date, shelf life, production license number and safety warnings; multi-language labels can be customized according to customer needs to ensure compliance with the regulatory requirements of different countries and regions. V. Applicable Application Fields The product has a wide range of application scenarios, covering multiple core industries: In the industrial coating field, as an anti-settling agent, thickener and scratch-resistant agent, it is used in automotive coatings, furniture coatings, etc., which can improve coating stability and wear resistance; In the synthetic rubber field, as a reinforcing agent, it is used in tires, seals and other products to enhance rubber mechanical properties and aging resistance; In the pharmaceutical field, as a pharmaceutical excipient (glidant, disintegrant), it is used in the production of tablets, capsules and other preparations; In the daily chemical field, it is used in cosmetic powders, toothpaste and other products to improve dispersibility and skin feel; In addition, it can also be applied in electronic packaging materials (moisture-proof and insulating) and feed additives (anti-caking and moisture-proof) and other fields, adapting to the needs of different industries with its diversified properties. VI. Conclusion The hydrophobic silica of Shandong Zhonglian Chemical Co., Ltd. is positioned with the core of "precision modification, multi-functional adaptation and quality control". Relying on 112 years of industry experience, advanced production technology and full-chain service system, it provides customized hydrophobic silica solutions for customers in various industries. The company is committed to promoting the upgrading of downstream industries with high-performance products and sincerely welcomes customers at home and abroad to consult, test samples and cooperate.