Based on the available product information for KR-904 Aqueous Dispersant, here is an overview of its performance and applications.
Performance and Mechanism
KR-904 is an aqueous dispersant composed primarily of an anionic polymer. Its dispersing mechanism is based on adsorption and electrostatic repulsion: it adsorbs onto the surface of various microscopic particles and generates electrostatic repulsion to keep them dispersed, preventing sedimentation and coarse turn-back (re-agglomeration).
Key performance characteristics include:
Low foaming.
Non-toxic and non-corrosive, classified as a non-hazardous product.
Viscosity reduction: Significantly reduces the viscosity of slurries during the grinding process, facilitating processing and ensuring stable slurry viscosity after dispersion.
Technical Specifications
Typical specifications for KR-904 are as follows:
Parameter Specification
Appearance Colorless to light yellow viscous liquid
Solid Content ≥ 40.0%
pH (50% aqueous solution) 8.0 – 11.0
Density (20°C) ≥ 1.20 g/cm³
Viscosity (25°C) 50 – 400 mpa.s
Applications
KR-904 is widely used across several industries, primarily as a dispersant, grinding aid, or chelating agent.
Its main application areas include:
Coatings and Papermaking: Used as a dispersant in paper coatings, building coatings, and as a chelating dispersant in textile printing and dyeing.
Construction: Functions as a concrete retarder and water reducer.
Mineral and Material Processing: Added during the grinding process of slurries such as kaolin, calcium carbonate, pottery clay, titanium dioxide, talc, barium sulfate, coal-water slurry, and cement to reduce viscosity and improve processing efficiency.
Usage Instructions
Recommended Dosage: The general recommended dosage is 0.2 – 2% of the material (based on solid/solid ratio).
Optimal Dosage: The optimal dosage should be determined through experimentation.
Storage and Handling
Storage: Store in a cool, dry indoor place, protected from freezing and direct sunlight.
Shelf Life: The typical shelf life is 10 to 12 months under proper storage conditions.
Packaging: Available in plastic drums, commonly 25kg, 30kg, or 250kg, or according to customer requirements.