Carbon black’s high surface area (≥300m2/g) and hydrophobicity induce “fibrous agglomerates” in inks, causing jetness loss and printing defects. One gravure ink manufacturer observed 50% viscosity increase after 7 days storage and edge color difference (ΔE≥3.5).
Chemi Tech’s Solution:
KMK-1750 features:
Amphiphilic block design:
Polyether-polyurethane blocks (MW 6000–8000Da) anchor carbon layers while extending hydrophilic chains for steric hindrance.
Jetness enhancement:
Dynamic surface tension ≤25mN/m releases primary particles, increasing jetness to 183 (ISO 2470).
pH resilience:
Stable at pH 4–11 in alcohol ether/water systems, preventing flocculation.
Customer Proof:
KMK-1750 replacing DisperBYK-011 in PU gravure ink:
Dosage: 35% on carbon black weight (vs. 45% previously);
Outcomes:
D50=185nm maintained for 90 days;
Ink viscosity stabilized at 23s±1 (cup #4, 25°C);
Print color difference ΔE≤1.0, saving ￥850,000 annually.
Ideal for packaging/publishing inks demanding high jetness.