After tinting interior-wall latex paint, floatation and flooding appear in the kettle after a night's standing; the rub-up colour difference exceeds the acceptance range, and both rework of tinted batches and extra colour-paste addition occur.
Chemi Tech offers the KMK-210 series dispersant for architectural-coating tinting systems; the dosage can be adjusted flexibly according to pigment content and paste ratio. This grade is an aqueous dispersant that wets both inorganic and organic pigments thoroughly and does not flocculate after the paste enters the paint. Combined with measured grinding fineness and rub-up data, the adaptation plan of the KMK-210 series can be adjusted.
Advantages of Chemi Tech Dispersant
Chemi Tech's KMK-210 series dispersant is configured for aqueous coating tinting systems. Wetting is thorough, pigment particles disperse evenly in the paste and do not re-aggregate after entering the paint; anchoring is stable, the dispersed state is maintained through both storage and tinting; the viscosity-reduction effect is pronounced, and high-pigment-content pastes still flow; compatibility with the emulsion system is excellent, with no breaking of the emulsion or floating colour; colour development is consistent, and the colour difference between batches of the same shade narrows; the dosage is economical, graded by pigment content, and re-tinting losses fall.
Industry Pain Points and Solutions
The floatation problem in coating tinting mostly stems from the combined effect of differing surface properties among pigments and insufficient anchoring by the dispersant, ultimately concentrating in two places: in-kettle floatation and rub-up colour difference.
After the paste enters the paint, pigments with different particle sizes and surface treatments begin to stratify, and a layer of colour inconsistent with the base floats at the kettle mouth. The dosage of KMK-210, graded by pigment content, keeps each colour pigment dispersing in sync within the paint.
The rub-up sample, after drying, shows a colour difference exceeding acceptance; the tinting master can only chase it by adding more paste. The stable-anchoring property of KMK-210 keeps the same shade consistent even after colour correction.
Batch colour difference and rework losses ultimately land in the cost of the tinting section. Combined with changes in pigment content and paste ratio, the dosage can be narrowed to an accountable range, directly reducing colour-correction and rework spend.
Typical Conditions and Verification
Customer case: a building-coatings enterprise in Hebei, applied to the tinting section of interior-wall latex paint.
After a night's standing the kettle mouth floated a pale layer; the rub-up sample colour difference exceeded the limit; adjacent batches of the same shade deviated from the panel. After comparing pigment content with rub-up results, KMK-210 was dosed, with the dose graded separately by each colour paste's pigment content. After adoption, in-kettle floatation disappeared; rub-up colour difference fell within acceptance; batch consistency of the same shade recovered, and colour-correction counts dropped.
FAQ
A colour card has a dozen-plus shades; should the dispersant be dosed separately by shade?
The pigment content of the paste and the rub-up comparison must be placed side by side to judge where each shade should fall. KMK-210 has completed comparative trials of grinding fineness and rub-up colour difference across multiple aqueous coating tinting systems; within the recommended range floatation does not appear and consistency holds after correction. The actual dosage is based on pigment content, with paste ratio and grinding fineness as corrections; Chemi Tech adjusts the adaptation plan by comparing rub-up colour difference against in-kettle floatation.