Polymer Dispersant Selection Guide: Professional Solutions for Slurry Stability Challenges

In the production of coatings, inks, and fine chemicals, the stability of slurries directly determines the performance and appearance of the final product. Common pain points include: pigment particles prone to agglomeration, leading to reduced tinting strength; slurry settling or re-coarsening during storage, affecting production continuity; and surface defects such as floating, flooding, or uneven gloss on coatings.

Chemi Tech's polymer dispersants utilize a unique block copolymer structure that precisely anchors onto particle surfaces, creating steric hindrance and establishing a long-term stable barrier between particles. This mechanism effectively overcomes agglomeration caused by van der Waals forces, ensuring uniform dispersion of particles within the system.

To address specific needs, we recommend following these steps to select the appropriate dispersant: Step 1, analyze the surface properties of the particles to be dispersed and the polarity of the system; Step 2, conduct laboratory-scale trials to evaluate initial dispersion effect and viscosity changes; Step 3, perform thermal storage and freeze-thaw cycle stability tests; Step 4, determine the optimal dosage based on final application performance (such as gloss, transparency).

Case Study: An industrial coatings customer encountered issues with re-coarsening after one week of storage and low grinding efficiency when producing a high-solid carbon black paste. By adopting Chemi Tech's recommended polymer dispersant CT-520 series, which features strong anchoring groups, the fineness significantly reduced within the same grinding time. The slurry's viscosity change rate was less than 5% after four weeks of storage at 50°C. It was successfully applied in subsequent production lines, greatly improving batch-to-batch consistency.

Chemi Tech is committed to providing customized dispersion solutions. Our technical support team can assist customers throughout the entire process from problem diagnosis to product optimization, helping to enhance product competitiveness.