Tech-5366, a new generation of super dispersant developed by Tiger Additive, has become the strongest polyester dispersant for stabilizing inorganic powders in Tiger Additive due to its unique molecular structure and composition. It specifically solves the dispersion and stability problems of inorganic powders in high-temperature process slurries!

1、 Why is it stable?

Tech-5366 is a modified polyester copolymer containing acidic groups, which is based on the latest polyester synthesis process of TAG Heuer additives. As a new generation of high-performance super dispersants, this type of polymer dispersant is rare in the market. Generally, the negatively charged oxygen on the surface of alkaline inorganic substances ionizes through the head group and adsorbs with the Tech-5366 acidic group, stably wrapping around the surface of the pigment.

 

01.  Accurate anchoring of acidic functional groups

Unlike conventional polyester dispersants on the market, the acidic groups of TAG Tech-5366 ionize negatively in solvents and can form ionic bonds with inorganic pigment surfaces (usually positively charged, such as titanium dioxide and iron red) through electrostatic attraction. The adsorption energy is 5-10 times that of general hydrogen bonds, greatly avoiding powder flocculation during storage.

02. Stereoscopic Defense of Modified Polyester Chain

The solvation layer is a protective layer formed by the extension of the solvent chain segments of the dispersant adsorbed on the surface of particles in the medium, which prevents particle aggregation through steric hindrance effect. Its thickness directly affects dispersion stability, and it is generally believed that the solvation layer needs to reach 8-9 nm or more to effectively resist van der Waals forces and prevent flocculation. Under high temperature conditions, the difficulty of stability increases exponentially with the decrease in the fineness of inorganic particles.

Tech-5366 polyester long chains can fully stretch in solvents, and with its high molecular weight, a thicker solvation layer can be formed on the surface of inorganic powders. The entropy repulsion effect (steric hindrance) prevents pigment particles from approaching, further improving steric hindrance efficiency and effectively suppressing Brownian motion. Space steric hindrance is more resistant to electrolyte interference than charge repulsion, and maintains product performance without failure under high temperature, grinding, and high shear forces

03.  Intelligent response of block copolymers

Thanks to TAG’s advanced polymer synthesis technology, Tech-5366 has achieved molecular level zoning design in its structure, resulting in a narrower molecular weight distribution and better stability. To achieve non-interference between the anchoring section and the solvation section in the liquid phase, maximize efficiency, and dynamically adjust the chain segment conformation in the slurry, not only to adapt to different polar solvents, but also the dynamic adjustment ability of dispersants is crucial for controlling anti coarsening during the transition from liquid phase to solid phase:

High temperature anti coarsening, poor dynamic balance (left), good dynamic balance (right)

 

2、 Stability testing

01.  Matte polyester amino paint

We selected dispersed matte powder in a polyester amino resin system and used a high-temperature curing process of baking at 180 ℃ for 30 minutes. We focused on comparing the performance of liquid coatings containing Tech-5366 after 7 days of thermal storage at 50 ℃ (simulating long-term storage or transportation environment). The basic formula for testing is as follows:

The performance comparison before and after thermal storage is as follows:

1) Viscosity stability: 1% Tech-5366 in the formula achieves a viscosity change of less than 0.5% before and after thermal storage, and the viscosity is stable.

 

2) Stable extinction effect: 1% Tech-5366 in the formula maintains the same glossiness before and after thermal storage, and the extinction effect is stable.

3) Stable surface effect: Scrape the coating containing Tech-5366 onto the tinplate, and after 180 ℃+30 minutes, the surface leveling is excellent, the matte powder is arranged well, there are no white spots, and the surface effect remains consistent before and after thermal storage

4) Stable storage without layering: The paint material has no obvious layering, settling, or clumping after thermal storage, and has good storage stability

 

 

02.  Saturated polyester white paste

We used a saturated polyester resin system to disperse titanium dioxide and employed a long-term high-temperature curing process. We focused on comparing the performance of liquid coatings containing Tech-5366 after 7 days of thermal storage at 50 ℃ (simulating long-term storage or transportation environments). The basic formula for testing is as follows:

1) Viscosity stability: Tech-5366 achieves a viscosity change of less than 0.5% before and after thermal storage of 60% titanium dioxide slurry, with stable viscosity.

2) Gloss stability: Tech-5366 achieves 60% titanium dioxide slurry with unchanged glossiness before and after thermal storage.

3) Stable surface effect: Scrape the coating containing Tech-5366 onto the tinplate, and after high-temperature curing, the surface effect is excellent with high whiteness. The whiteness remains consistent before and after thermal storage, and the surface effect is stable.

03.  Saturated polyester iron pigment paste

We selected a saturated polyester resin system to disperse iron oxide red and iron oxide yellow, and used a high-temperature curing process of 180 ℃+30 minutes. We focused on comparing the performance of liquid coatings containing Tech-5366 after 7 days of thermal storage at 50 ℃ (simulating long-term storage or transportation environments). The basic formula for testing is as follows

1) Viscosity Stability: Tech-5366 Dispersed Iron based Pigments have a viscosity change of less than 0.5% before and after thermal storage, indicating stable viscosity.

2) Glossiness Stability: Tech-5366 Dispersed Iron based Pigments: The surface effect of the coating remains basically unchanged before and after thermal storage

 

3) Stable board surface effect: Scrape the coating containing Tech-5366 onto the tinplate (wet film 40um), cure at 180 ℃ for 30 minutes, and the board surface effect is excellent. The board surface remains consistent before and after thermal storage, and the board surface effect is stable

4) Stable anti floating color performance: Mix 10 grams of saturated polyester white paste and 1 gram of saturated iron pigment paste evenly, and let them sit for one week to test the floating color situation. The color difference of iron red paint is △ E ≤ 0.2, and the color difference of iron yellow paint is △ E=≤ 0.35. There is no obvious floating color visible in the tank, and the anti floating color performance is stable.

 

3. The product’s own resistance to yellowing

In order not to affect the whiteness, many customers test the yellowing of the dispersant itself at high temperatures before conducting application experiments, in order to preliminarily screen titanium dioxide dispersants. For this purpose, Tiger Additive has identified three main structural reasons why dispersants are prone to yellowing at high temperatures:

Tech-5366, as a new generation super dispersant from TAG Heuer, minimizes the addition and contamination of the above-mentioned functional groups. With the support of advanced polymerization technology, its yellowing resistance is significantly stronger than other acidic dispersants, and its molecular structure is stable!

Compared to ammonium salt dispersants, the white coating produced by Tech-5366 has a lower b-value (b=-5.2), a more blue phase, significantly improved visual whiteness, and increased glossiness (115 °).

 

4.  Summary

Tech-5366, as a new generation high-performance polyester dispersant from TAG Heuer, forms strong ionic bonds with inorganic powders through acidic groups for adsorption (adsorption energy can reach 5-10 times that of hydrogen bonds), and uses modified polyester long chains to construct a thicker solvation layer. It resists high temperature, high shear force, and electrolyte interference through steric hindrance, achieving super stability.
Tech-5366 performs exceptionally well in harsh applications and is particularly suitable for dispersing titanium dioxide and iron-based pigments. The viscosity change before and after thermal storage is less than 0.5%, and the viscosity is stable, the glossiness is stable, and the anti floating color is stable.
Tech-5366 combines environmental protection and whiteness improvement. It does not contain PFAS, benzene solvents, or organotin, giving the paint film a blue white phase and significantly enhancing glossiness. The product itself has good resistance to yellowing, making it suitable for high-temperature curing process slurries.