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

WACKER 551 HP 2 Silicone Microemulsion

WACKER SILICONES’ 551 HP 2 is a high-performance silicone microemulsion designed for textile softening and hydrophobic finishing. It delivers excellent emulsion stability, low viscosity, and superior fabric hand feel with durable water repellency. Compatible with cationic systems, it ensures uniform application and wash-fast results in industrial textile processing.
  • wacker 551 hp 2 silicone microemulsion_906d57a2
  • wacker 551 hp 2 silicone microemulsion_906d57a2

Features Of WACKER 551 HP 2 Silicone Microemulsion

  1. Stable, low-viscosity anionic silicone microemulsion with excellent shelf life under ambient storage conditions.

  2. Provides outstanding surface slip, softness, and hydrophobicity to treated substrates without compromising breathability.

  3. Compatible with cationic, nonionic, and amphoteric systems—enabling flexible formulation integration in complex aqueous matrices.

  4. Low foaming profile supports high-speed industrial application methods including spray, dip, and pad processes.

  5. Free of APEOs (alkylphenol ethoxylates) and compliant with major global regulatory frameworks for industrial coatings and textiles.

Typical Applications Of WACKER 551 HP 2 Silicone Microemulsion

  1. Textile finishing for apparel, home textiles, and technical fabrics requiring durable softness and water repellency.

  2. Leather conditioning and topcoat additives to enhance grain flexibility, touch feel, and resistance to dry cracking.

  3. Water-based architectural coatings for improved substrate wetting, leveling, and reduced surface tension.

  4. Nonwoven fabric treatment in hygiene and medical applications to impart skin-friendly softness and fluid barrier enhancement.

  5. Industrial maintenance coatings where silicone functionality must be retained without solvent or VOC constraints.

Specifications Of WACKER 551 HP 2 Silicone Microemulsion

Chemical TypeAnionic polydimethylsiloxane (PDMS) microemulsion
Product FormAqueous dispersion (non-solvent)
AppearanceClear to slightly opalescent liquid
pH (1% aqueous solution, 20 °C)6.0 – 7.5
Active Content (by weight)28 – 32 %
Viscosity (25 °C, mPa·s)5 – 25 (Brookfield LVT, spindle #1, 6 rpm)
Particle Size (D50)< 50 nm (by dynamic light scattering)
Freeze-Thaw StabilityPasses 3 cycles (–5 °C / 24 h → 25 °C / 24 h)


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