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Dow DOWSIL FZ-4658 is an amino functional silicone microemulsion in the DOWSIL series, designed for waterproofing and softening finishing applications. It forms a uniform protective film on substrates, offering excellent water resistance and softening effects while effectively reducing yellowing risk, a versatile core additive for textiles, automotive care and other fields.
Efficient Film-Forming & Waterproofing - Rapidly forms dense protective film, imparting excellent water repellency to substrates
Low Yellowing & Softening - Enhances soft hand feel while inhibiting yellowing after finishing
Stable Microemulsion System - Good dispersibility, compatible with various aqueous processing and finishing systems
Wide Substrate Adaptability - Suitable for treatment of textiles, automotive surfaces and other substrates
Easy Processing & Compatibility - Simple operation, can be used synergistically with most finishing additives
Textile Waterproof Finishing - Apparel, home textile fabrics, providing dual effects of water repellency and softness
Textile Softening Processing - Various fiber fabrics, improving hand feel and reducing yellowing tendency
Automotive Care Applications - Car wash and care agents, enhancing surface water resistance and gloss
Leather Finishing Treatment - Artificial leather, genuine leather products, optimizing softness and water resistance
Coating Material Modification - Functional coatings, improving surface protection and tactile performance
| Brand | DOW |
| Product Type | Amino Functional Silicone Microemulsion |
| Appearance | Translucent Liquid |
| Active Content | 23% |
| pH Value (25℃) | 5.0 – 9.0 |
| Ionic Character | Non-Ionic |
| Core Characteristics | Film-forming waterproofing, low yellowing |
Q1: What is the primary functional role of DOWSIL FZ-4658 Silicone Oil in formulations?
A: DOWSIL FZ-4658 is a specialty silicone oil designed primarily as a surface modifier and processing aid—improving substrate wetting, reducing surface tension, and enhancing slip and leveling in coatings, inks, adhesives, and sealants.
Q2: Is DOWSIL FZ-4658 compatible with water-based systems?
A: Yes, it is formulated to be readily dispersible in aqueous systems without requiring high-shear emulsification, making it suitable for use in waterborne coatings, latex paints, and other water-based industrial formulations.
Q3: How does DOWSIL FZ-4658 differ from conventional dimethyl silicone oils?
A: Unlike standard linear polydimethylsiloxanes, FZ-4658 features tailored molecular architecture—including controlled branching and reactive or polar end-groups—that delivers improved compatibility with polar resins and enhanced migration resistance while maintaining low surface energy benefits.
Q4: What are typical dosage guidelines for optimal performance?
A: It is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to the total formulation—depending on the desired effect, substrate, and system polarity; dosage should be optimized empirically for each application.
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