A high-quality coupling agent for achieving strong bonding between inorganic and organic materials Changfu SUA33

In the field of composite materials, achieving an efficient and stable combination between inorganic materials (such as glass, metals, and minerals) and organic polymers (like resins and rubbers) is a critical factor in enhancing product performance. However, due to fundamental differences in their physical and chemical properties, this has long been a significant technical challenge. To address this industry bottleneck, Changfu Chemical has successfully launched ChangFu^® SUA33 [(3-triethoxysilyl) propyl succinic anhydride; CAS: 93642-68-3]. This product is a high-performance silane coupling agent featuring unique anhydride functional groups. Its molecular structure ingeniously integrates the tackifying properties of silane with the high reactivity of anhydride. This allows it to effectively graft organic resins containing active hydrogen groups, significantly enhancing the interfacial bonding force between inorganic materials and organic polymers. Consequently, it comprehensively improves the mechanical properties, durability, and reliability of the final product, providing an ideal solution for the organic-inorganic compatibility problem.

Product features:

l  Excellent carboxylic acid coupling agent and crosslinking agent.

ChangFu^® SUA33 is an excellent carboxylic acid-based coupling agent and crosslinking agent, designed to deliver reliable performance in advanced polymer and composite systems. With high reactivity and structural stability, it serves as a versatile intermediate that effectively participates in multiple chemical reactions, making it suitable for industrial manufacturing, material modification, and high-performance formulation applications.

l  It can react with amino, epoxy, hydroxyl and other groups, and is used for polymer modification.

    The core strength of ChangFu^® SUA33 lies in its ability to readily react with a variety of functional groups, including amino, epoxy, and hydroxyl groups. This broad reactivity spectrum enables efficient grafting, crosslinking, and chain extension during material processing, thereby precisely controlling the polymer structure. By improving molecular bonding and overall structural integrity, it helps optimize the physical and chemical properties of polymer materials. This results in enhanced processability, increased mechanical strength, and improved long-term durability under diverse service conditions, meeting the demands of high-performance applications.

l  Provides enhanced compatibility and improved bonding performance in various composite materials.

ChangFu^® SUA33 reduces surface tension, improves dispersion uniformity, and minimizes phase separation issues that often compromise composite performance. By strengthening interfacial adhesion and bonding performance, it effectively improves mechanical strength, wear resistance, weatherability, and thermal stability of the final products. With stable performance and good compatibility with multiple resin systems, it is widely used in coatings, adhesives, sealants, engineering plastics, and other composite applications, helping to achieve higher product quality and more consistent performance.

Typical Applications:

1. Adhesion Promoters: Enhance the adhesion of adhesives and sealants (such as silicone adhesives, epoxy adhesives) to substrates like glass and metal.

²  ChangFu^® SUA33 is widely used in electronic packaging adhesives based on epoxy resins and silicones, providing reliable adhesion and enhanced stability for electronic components.

²  In construction and industrial applications, ChangFu^® SUA33 improves the performance of silicone adhesives, polyurethane adhesives, and other structural sealants.

²  ChangFu^® SUA33 serves as an important additive in high-performance coatings and inks, enhancing adhesion, scratch resistance, and weatherability.

2. Composite Materials: Used in glass fiber and mineral-filled plastic composites, significantly improving their mechanical strength and durability.

²  Unsaturated polyester glass fiber reinforced plastics (used in ships, water tanks, automotive parts)

²  ChangFu^® SUA33 is used in high‑performance epoxy composites for printed circuit boards, electrical insulation materials, and aerospace components.

²  ChangFu^® SUA33 improves the performance of mineral‑filled thermoplastics such as polypropylene (PP) and polyamide (PA) filled with calcium carbonate, talc, and other inorganic fillers.

3. Surface Treatment Agents: Used as surface treatment agents for inorganic materials like glass, metals, and silica, and can better compatibility and bond with organic resins.

²  Surface modification of nano‑silica to improve dispersion and polymer compatibility.

²  Anti‑corrosion pretreatment of metal surfaces to enhance coating adhesion and durability.

²  Functionalization of glass surfaces for better bonding in composite and adhesive systems.

ChangFu^® SUA33 [(3-triethoxysilyl) propyl succinic anhydride; CAS: 93642-68-3] is a high-performance silane coupling agent featuring highly reactive anhydride and triethoxysilyl groups. It is specially designed to establish stable chemical bonds between inorganic substrates such as glass, minerals, and metal oxides, and organic polymers including epoxy, polyurethane, acrylic, and phenolic resins. By precisely optimizing the organic-inorganic interface structure, it effectively reduces interfacial tension and improves phase compatibility, resulting in significantly enhanced mechanical strength, toughness, and long-term durability of composite materials.

With excellent reactivity and adhesion promotion performance, ChangFu^® SUA33 greatly enhances bonding fastness, weather resistance, heat stability, and chemical corrosion resistance. It is widely used in high-performance coatings, structural adhesives, glass fiber composites, engineered plastics, electronic encapsulation materials, and surface modification industries. It helps end products achieve higher reliability, longer service life, and more stable performance under harsh conditions.

Make adhesion stronger and materials more excellent!

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Key words: (3-triethoxysilyl) propyl succinic anhydride; CAS: 93642-68-3; Silane coupling agent; Adhesion; Epoxy resin.