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Home / News / Industry News / Too Much Anti-Settling Agent Making Leveling Worse? DH-7512W Resolves This in Waterborne Systems
Industry News
Waterborne Coatings · Inks · Colour Pastes · DH-7512W
In waterborne coatings, inks, and waterborne colour pastes, formulation design often needs to consider both storage stability and application performance simultaneously. Pigments and fillers readily settle during long static periods, while during application, if the system's structural capability is insufficient, thick-coat areas can develop sagging. The real difficulty is that anti-settling and leveling are not simply "the higher the viscosity the better." Therefore, rationally managing system thixotropy is more important than simply raising viscosity.
Common Problems
1
Pigment and Filler Settling After Storage
During extended static periods, pigments and fillers gradually accumulate toward the bottom, affecting product uniformity.
2
Sagging During Thick-Coat Application
After receiving application shear, insufficient system structure causes the film to flow easily under gravity.
3
Leveling Worsens After Anti-Settling Improvement
Increasing thickener or viscosity to prevent settling may reduce coating flowability, affecting film flatness.
4
Colour Paste and Matting Paste Stability Insufficient
Pigments or matting powder re-agglomerate during storage, affecting subsequent tinting and application performance.
Why Simply Raising Viscosity Is Not the Solution
The ideal approach is to use thixotropic structure for rheology management. In the static state, forming a certain structure can slow pigment and filler settling; when subjected to application shear, system viscosity decreases to support coating spread; and when shear stops, as the structure gradually recovers, it helps maintain film stability. Rationally managing thixotropy achieves balance across both static and application states.
DH-7512W: Liquid Rheology Modifier for Waterborne Systems
DH-7512W is a liquid-type rheology modifier that primarily improves the rheological state of waterborne coatings and inks by adjusting system thixotropy. Its characteristic is that a relatively low addition level produces a pronounced thixotropic effect — it can improve pigment and filler suspension stability, reduce settling during storage, improve anti-sagging capability during thick-coat application, and minimise the impact on leveling performance. Beyond conventional waterborne coatings and inks, it is also applicable to waterborne matting pastes and waterborne colour paste systems.
Dosage Reference
Anti-settling improvement0.3%–1.5% of total formulation
Anti-sagging improvement0.3%–3.0% of total formulation
Actual dosage should be optimised based on specific formulation conditions.
Anti-settling and anti-sagging in waterborne systems are fundamentally both about managing rheological state. Simply raising viscosity easily affects application and leveling, while rationally building a thixotropic structure achieves better balance. DH-7512W provides a rheological solution that balances storage stability and application performance for waterborne coatings, inks, and colour pastes.
Frequently Asked Questions
Can DH-7512W be used alongside other thickeners in the same system?
Yes — it can be combined with HASE, HEUR, or cellulose-type thickeners to achieve a specific rheological profile. DH-7512W provides thixotropic low-shear structure that other thickener types may not efficiently provide alone. The combination and dosage should be evaluated for the specific system to confirm the target storage and application viscosity profile.
Does DH-7512W affect gloss or transparency in waterborne systems?
At effective dosage levels, DH-7512W is formulated to build thixotropic structure without significantly affecting gloss or film transparency. Dosage above the effective range may begin to affect surface appearance, so evaluation at the recommended range before confirming the production addition level is advised.
