We often have a headache when it comes to choosing between the universality of dispersed pigments and the color development of spot colors, in order to meet the current better cost-effectiveness and improve product competitiveness. Tech-58687, a Thai block polyurethane super dispersant, is a particularly specialized and suitable for use in spot color slurries. Don't miss it !

1. The Birth of Tech-58687: Evolution from "Comb" to "Block"

     Market mainstream: comb shaped polyurethane dispersant
     Most polyurethane dispersants on the market are mainly comb shaped polyurethane dispersants, with multiple branches (such as polyether units) connected to the main chain, forming a regular structure similar to a "comb". The molecular chains are long and the monomer variability is strong. The steric hindrance effect can be optimized by adjusting the length and density of the branches

     Breakthrough in adsorption form :
Traditional random polymers have a loose structure and adsorption forms that are mostly "horizontal" or "circular", resulting in low spatial hindrance contribution. In contrast, the branched chains of the comb like structure of the comb like polyurethane dispersant can form dense "tail shaped adsorption", significantly improving the steric hindrance efficiency.

Schematic diagram of Tech-58687 adsorption on carbon black surface

Innovation of Tech-58687: Block Aggregation Technology
① Strong anchoring: More abundant and selective affinity pigment anchoring groups are precisely embedded in polymer segments. These functional groups are designed for the surface characteristics of specific pigments, especially carbon black, organic pigments, and effect pigments, to form stronger and denser chemical anchoring
②  Intelligent solvation chain: The design of solvation chain segments (usually polyether/polyester) takes into account the changes in PVC (pigment volume concentration) during the coating drying process. This enables Tech-58687 to dynamically regulate its adsorption force on pigment surfaces. Provide sufficient steric hindrance during the dispersion grinding stage (high solvent content, low PVC); During the film-forming and drying stage (solvent evaporation, PVC elevation), the chain segments can more tightly wrap around the pigment, providing stronger steric hindrance stability, effectively preventing later flocculation, and ensuring the final color development effect of the coating film

③ Synergistic effect : The block structure makes the functional zoning between the anchoring group and the solvation chain segment clearer, and the synergistic effect between the two is stronger, exhibiting performance beyond traditional comb dispersants in spot color applications

2. Tech-58687 Basic Information

Model :  Tech-58687
Ingredients : Contains pigment affinity groups polymer block copolymer
Appearance : Yellow transparent solution
Active ingredient : 30%
Solvent : diethylformamide

3. Core advantages of the spot color king Tech-58687
     Tech-58687, with its unique block structure, demonstrates unparalleled advantages in spot color applications :

① Ultimate color display and transparency :
     High color rendering intensity: The strong anchoring and optimized spatial hindrance enable pigment particles to be fully depolymerized and stably dispersed, maximizing the release of the pigment's own color intensity and saturation. Especially for high-performance organic pigments such as carbon black, phthalocyanine blue/green, quinacridone red/purple, DPP red, and some inorganic pigments, the effect is significant
     Excellent Transparency: Effectively preventing pigment coagulation and coarsening, ensuring excellent transparency of the dispersion system, which is crucial for metal base paints, transparent pigments, pigments in gloss varnish, and effect coatings that require high transparency
     Pure color tone: reduces issues such as floating color, blooming, and haze caused by poor dispersion, presenting a purer, brighter, and more consistent color tone

② Wide resin compatibility :
     The carefully designed solvation chain segments enable it to maintain good compatibility with various mainstream resin systems, such as 1K hydroxy acrylic acid, 2K PU polyurethane, polyester, alkyd, epoxy, etc
     Excellent compatibility ensures that there will be no compatibility issues such as precipitation, coagulation, thickening, or loss of gloss when the color paste is transferred to different systems, simplifying formula design and improving the versatility of the color paste (within the target resin system)

③ Minimal impact on paint film performance :
     Excellent chemical resistance: Strong anchoring and dense coating reduce the negative impact of pigments on the resistance of paint films, helping to maintain or even improve the water resistance, solvent resistance, acid and alkali resistance of paint films
     Good dryness: The solvation chain segment is designed reasonably, which has little effect on the drying speed of the paint film and will not cause slow drying or affect the cross-linking reaction
     Stable storage: Provides excellent long-term storage stability, preventing sedimentation, coarsening, increased viscosity, or decreased performance of the color paste during storage

4. Tech-58687 Actual Effect: Seeing is believing
     We selected commonly used polyurethane dispersants in the market to disperse different pigments in different resin systems and conducted parallel tests. The color development is as follows:

① 1K Hydroxyacrylic Resin System (Click on Image to Enlarge)

     Dispersing carbon black in the 1K propane system, Tech-58687 exhibits significantly higher blackness (lower L * value) and blue phase, with excellent transparency, significantly better than the control sample. When dispersing high saturation organic pigments, the color intensity is higher and the color tone is purer

② 1K Hydroxyacrylic Resin Silver Paint (Click on the image to enlarge)




     The color paste used for silver powder paint, Tech-58687 dispersed color paste has little interference with the arrangement of silver powder, strong metallic feeling, bright and transparent base color, and no obvious fog shadow on the side

③ PU polyurethane system (click on the image to enlarge)




     In the PU system, Tech-58687 dispersed pigments have good compatibility, excellent color development, high gloss of the paint film, and good resistance performance

④ Polyester system (click on the image to enlarge)




In polyester coil coatings, Tech-58687 also exhibits high color development and excellent stability


5. Summary
     Based on comprehensive laboratory testing and practical application results, Taige Tech-58687 block polyurethane super dispersant fully demonstrates its excellent performance in the field of spot color :
●  Spot color display king: With its unique block structure and strong anchoring groups, it provides top-level display strength, transparency, and pure color tone for carbon black, high saturation organic pigments, and effect pigments, making it an ideal choice for pursuing ultimate spot color effects
●  Dynamic stability guarantee: For the optimized solvation chain segment in the drying process, dynamic adsorption regulation is achieved to effectively prevent later flocculation and ensure consistent performance from the color paste to the final coating
●  Widely compatible and worry free: compatible with multiple mainstream resin systems (1K acrylic acid PU、 Polyester and other materials exhibit excellent compatibility, simplify formulations, and enhance the applicability of colorants
●  Protector of paint film performance: It has minimal impact on key properties such as chemical resistance and dryness of the paint film, and may even be helpful
●  High cost-effectiveness solution: In spot color application scenarios, its outstanding performance provides significant value beyond its cost, effectively enhancing the competitiveness of end products

     Choosing Tech-58687 means injecting more vibrant vitality, transparent texture, and reliable performance into your spot color application!