KR-445N is the fully neutralized sodium salt form of a low-molecular-weight polyacrylic acid homopolymer. It is a water-soluble polymer supplied as a clear, colorless to pale yellow aqueous solution.
Key Technical Specifications
Parameter Typical Value
Chemical Name Polyacrylic Acid Sodium Salt (PAAS)
CAS Number 9003-04-7
Appearance Clear, colorless to pale yellow liquid
Average Molecular Weight ~4,500 Da
Solid Content 45% min.
pH (as supplied) 6.0 – 9.0 (neutral)
Density (20°C) 1.30 g/cm³ min.
Viscosity (20°C) 300 – 1,300 cps
Its key properties include:
Neutral pH: The full neutralization results in a near-neutral pH (6.0-9.0), making it suitable for applications where acidity is undesirable, such as in detergent formulations.
Strong Chelation: It efficiently chelates hardness ions like Ca²⁺ and Mg²⁺, softening water and preventing scale formation.
Excellent Dispersancy: It effectively disperses particulate soils, pigments, and inorganic matter, preventing their redeposition on surfaces.
Stability: It remains stable under high temperatures and in the presence of oxidizing biocides like chlorine, making it compatible with various industrial processes.
Main Applications
KR-445N is primarily used in the following applications:
Detergents and Cleaners: As a multifunctional builder and anti-redeposition agent in liquid and powder laundry detergents, automatic dishwashing (ADW) formulations, and industrial & institutional (I&I) cleaning products.
Industrial Water Treatment: Serves as a scale inhibitor and dispersant in recirculating cooling water systems, boiler water, and air conditioning loops.
Other Industrial Uses: Can be used as a dispersant for pigments, fillers, and ceramic slurries, as well as in textile processing.