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

BASF Rheovis AS 1125 Alkali Swellable Thickener

BASF Rheovis AS 1125 is an alkali-swellable associative thickener (ASAT) from BASF’s Rheovis® polymer series. It delivers high mid-shear viscosity, excellent flow control, and robust rheology in waterborne coatings and construction formulations. Compatible with common surfactants and biocides, it ensures storage stability and spatter resistance without compromising gloss or leveling.
  • basf rheovis as 1125 alkali swellable thickener_65d4162c
  • basf rheovis as 1125 alkali swellable thickener_65d4162c

Features Of BASF Rheovis AS 1125 Alkali Swellable Thickener

  1. High-efficiency rheology modification in alkaline aqueous systems (pH ≥ 8.5).

  2. Excellent suspension stability for pigments and fillers in waterborne formulations.

  3. Low-shear viscosity enhancement with minimal impact on high-shear flow and application properties.

  4. Good compatibility with common surfactants, co-thickeners, and biocides used in architectural coatings.

  5. Enables formulation flexibility with low addition levels (typically 0.2–0.6 wt% active)

Typical Applications Of BASF Rheovis AS 1125 Alkali Swellable Thickener

  1. Interior and exterior architectural wall paints (latex-based).

  2. Waterborne primers and undercoats.

  3. Textured decorative coatings and plasters.

  4. Water-based industrial maintenance coatings.

  5. Non-drip ceiling and anti-sagging formulations.

Specifications Of BASF Rheovis AS 1125 Alkali Swellable Thickener

Chemical TypeAcrylic copolymer, alkali-swellable associative (ASE)
Product FormAqueous dispersion (non-ionic/anionic stabilizers)
AppearanceOpaque white to off-white liquid
pH (as supplied)3.0 – 4.5
Active Content25.0 – 27.0 wt%
Viscosity (Brookfield RVT, spindle #3, 20 rpm, 25°C)1,500 – 4,500 mPa·s
Primary ApplicationsArchitectural coatings, industrial waterborne coatings
Key FeaturesAlkali-activated thickening, shear-thinning behavior, pigment stabilization


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