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

Covestro Bayhydrol U 355 Dispersant

Covestro Bayhydrol U 355 is a high-performance anionic polyurethane dispersion designed as a rheology modifier and stabilizer for waterborne coatings. It enhances pigment wetting, improves storage stability, and delivers excellent gloss and flow. Widely used in architectural and industrial coatings, it offers low VOC, good compatibility, and robust shear-thinning behavior without compromising film formation.
  • covestro bayhydrol u 355 dispersant_a3dde368
  • covestro bayhydrol u 355 dispersant_a3dde368

Features Of Covestro Bayhydrol U 355 Dispersant

  1. High-performance anionic polyurethane dispersion specifically engineered for pigment stabilization in waterborne coatings.

  2. Excellent wetting and deflocculation capability across organic and inorganic pigments, including high-surface-area carbon blacks and metal oxides.

  3. Enables low-viscosity formulations with outstanding storage stability and minimal sedimentation over extended periods.

  4. Compatible with a broad range of waterborne resins, including acrylics, polyurethanes, and hybrid systems.

  5. Supports high gloss, color strength, and batch-to-batch reproducibility in demanding industrial coating applications.

Typical Applications Of Covestro Bayhydrol U 355 Dispersant

  1. Automotive OEM and refinish basecoats requiring superior color development and jetness.

  2. Industrial maintenance coatings for metal substrates, including rail, agricultural, and construction equipment.

  3. Waterborne wood coatings where clarity, pigment retention, and film hardness are critical.

  4. Plastic coatings for automotive interior parts and consumer electronics housings.

  5. High-performance can and coil coatings demanding corrosion resistance and aesthetic consistency.

Specifications Of Covestro Bayhydrol U 355 Dispersant

Chemical TypeAnionic aliphatic polyurethane dispersion
Product FormAqueous dispersion
AppearanceOpaque white to slightly bluish liquid
pH (10% aqueous solution)7.5 – 8.5
Solids Content (wt %)30.0 – 32.0
Density (20 °C)1.02 – 1.04 g/cm³
Viscosity (DIN 4 mm cup, 23 °C)25 – 45 s
Minimum Film Formation Temperature (MFFT)≈ 15 °C


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