Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

WACKER Hydrophobic Fumed Silica HDK H30RY

Leveraging advanced thermo-mechanical properties, Wacker HDK H30RY is a methacrylic-functional hydrophobic fumed silica with ~300 m²/g surface area and ~7% carbon content. Its chemically modifiable groups covalently bond to resin networks (e.g., vinyl esters/polyesters/acrylates), enhancing mechanical strength and weatherability in coatings/adhesives, with pH 5-8 and 80 g/L tapped

Features Of WACKER Hydrophobic Fumed Silica HDK H30RY

  1. Covalent Reinforcement: 40% higher tensile strength via copolymerization with resins

  2. Hydrophobic Excellence: Water contact angle >120°, 50% better moisture resistance

  3. Broad Compatibility: Stable in solvent/solvent-free polar systems

  4. Process Efficiency: 0.3-2% dosage achieves thixotropic index 3.0

  5. Eco-Safe: PDMS-free, REACH/GB 30981-2020 compliant

Typical Applications Of WACKER Hydrophobic Fumed Silica HDK H30RY

  1. Industrial Coatings: Crater-free automotive clear coats (DOI≥95), 3000h QUV resistance

  2. Adhesives: +35% shear strength in epoxy structural adhesives for wind turbine blades

  3. Sealants: PU sealants with <2mm sag (ASTM D2202)

  4. Nail Gels: UV-curable formulations with 4H pencil hardness

Specifications Of WACKER Hydrophobic Fumed Silica HDK H30RY

Chemical TypeMethacrylic-silane modified silica
AppearanceWhite fluffy powder
Surface Area (BET)~300 m²/g
Tapped Density80 g/L
Carbon Content~7%
pH (4% methanol-water)5-8
Moisture Content<1%
SiO2 Content>99.8%
Packaging10kg/moisture-proof paper bag


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