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

BASF Rheovis AS 1125 Acrylic Alkali-Swellable Thickener

BASF Rheovis AS 1125 is a high-performance acrylic alkali-swellable thickener (AST) offering excellent rheology control, viscosity stability, and shear-thinning behavior in waterborne coatings and construction mortars. It delivers efficient thickening at low dosage, superior compatibility with surfactants and pigments, and outstanding freeze-thaw resistance without compromising gloss or sag resistance.
  • basf rheovis as 1125 acrylic alkali swellable thickener_2c86b05c
  • basf rheovis as 1125 acrylic alkali swellable thickener_2c86b05c

Features Of BASF Rheovis AS 1125 Acrylic Alkali-Swellable Thickener

  1. High-efficiency rheology modifier providing excellent viscosity build and sag resistance in alkaline systems.

  2. Delivers outstanding shear-thinning behavior for optimal application performance and leveling.

  3. Enhances water retention and improves open time in cementitious and gypsum-based formulations.

  4. Offers good compatibility with common surfactants, biocides, and co-thickeners such as hydrophobically modified ethoxylated urethanes (HEUR).

  5. Enables low-odor, VOC-compliant formulations suitable for indoor applications.

Typical Applications Of BASF Rheovis AS 1125 Acrylic Alkali-Swellable Thickener

  1. Interior and exterior architectural paints and coatings.

  2. Cement-based tile adhesives and grouts.

  3. Gypsum-based joint compounds and finishing plasters.

  4. Water-based decorative mortars and textured coatings.

  5. Fire-resistant intumescent coatings and sealants.

Specifications Of BASF Rheovis AS 1125 Acrylic Alkali-Swellable Thickener

Chemical TypeAcrylic alkali-swellable emulsion polymer
Product FormAqueous dispersion
AppearanceOpaque white liquid
pH (1% aqueous solution)2.5–4.0
Active Content (wt%)25.0–27.0%
Density (20 °C)Approx. 1.02 g/cm³
Viscosity (Brookfield RVT, spindle #3, 20 rpm, 25 °C)500–1500 mPa·s (as received)
Primary ApplicationsWaterborne architectural coatings, cementitious and gypsum-based building materials


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