|| 40-80%| | 10-20%Dispersant dosage (100% active content) | 7-15%|------------------------|------------------|--------------------------|---------------------------|| Organic Pigments | Low Surface Carbon Black | High Surface Carbon Black || Pigment Type || | --Flash point|| | >250℃Boiling point || ≤8| Colour (Gardner) || 1.02 g/cm³| Specific gravity|| | 99±1%Active ingredient || Yellow viscous liquid| Appearance|------------------------|------------------------| || Specification| Property

RD-9617 Dispersant: Enhancing Performance in Solvent-Based Coatings and Inks

## Abstract

RD-9617 is a high-performance polymer dispersant designed for solvent-based coatings and ink systems. This article provides a comprehensive overview of RD-9617, detailing its features, advantages, application areas, recommended dosage, and usage methods. By understanding the unique properties of RD-9617, formulators and technicians in the coatings and ink industries can optimize their formulations to achieve superior dispersion, stability, and application performance.

## Keywords

RD-9617; dispersant; solvent-based coatings; inks; carbon black; organic pigments; viscosity reduction

## 1. Introduction

In the formulation of solvent-based coatings and inks, achieving optimal dispersion of pigments and fillers is crucial for ensuring high-quality end products. Proper dispersion enhances color strength, gloss, and stability while improving application properties such as flow and leveling. RD-9617, a polymer dispersant, has been developed to address these challenges, offering exceptional dispersion efficiency and viscosity reduction in a wide range of solvent-based systems.

## 2. Features and Advantages of RD-9617

RD-9617 is a yellow viscous liquid with the following key features and advantages:

- **Excellent Dispersion Efficiency**: RD-9617 demonstrates outstanding grinding and dispersing effects on carbon black and organic pigments, ensuring uniform distribution and preventing pigment agglomeration.

- **Versatility**: This dispersant is highly versatile, suitable for various solvent-based coatings and ink systems, making it a valuable additive for formulators.

- **Effective Viscosity Reduction**: RD-9617 significantly reduces the viscosity of coatings and inks, improving flow and leveling properties. This is particularly beneficial in high-pigment-load and high-solids formulations.

- **High Stability**: With a boiling point exceeding 250℃, RD-9617 exhibits excellent thermal stability, maintaining its performance even under high-temperature conditions.

## 3. Product Specifications

| Property               | Specification          |

|------------------------|------------------------|

| Appearance             | Yellow viscous liquid  |

| Active ingredient      | 99±1%                 |

| Specific gravity       | 1.02 g/cm³            |

| Colour (Gardner)       | ≤8                    |

| Boiling point          | >250℃                 |

| Flash point            | --                    |

## 4. Application Areas

RD-9617 is widely used in the following applications:

1. **High-End Industrial Paints**: Suitable for plastic, wood, floor, and coil steel coatings, RD-9617 effectively disperses and grinds carbon black, organic pigments, and transparent iron oxides.

2. **Ink Systems**: Particularly effective in alkyd polyurethane ink systems, RD-9617 enhances the dispersion of carbon black and organic pigments, improving color strength and stability.

3. **Polyether/Polyester Polyol Color Paste Systems**: RD-9617 is used for grinding and dispersing color powders, ensuring uniform color distribution and stability in color paste formulations.

4. **Unsaturated Resin Color Pastes**: This dispersant is ideal for preparing unsaturated resin color pastes, enhancing dispersion and color performance.

5. **Solvent-Free Epoxy Systems**: RD-9617 is suitable for preparing black and organic pigment pastes in solvent-free epoxy systems, particularly in high-solids formulations.

6. **UV Wood Coatings**: In high-pigment-load and high-solids UV wood coatings, RD-9617 provides excellent viscosity reduction and filler dispersion, making it an ideal choice for demanding formulations.

## 5. Recommended Dosage

The recommended dosage for different types of pigments is as follows:

| Pigment Type           | Organic Pigments | Low Surface Carbon Black | High Surface Carbon Black |

|------------------------|------------------|--------------------------|---------------------------|

| Dispersant dosage (100% active content) | 7-15%            | 10-20%                   | 40-80%                    |

## 6. Usage Instructions

To achieve optimal dispersion, it is recommended to dissolve RD-9617 in the mixture of grinding base material before adding the pigment for grinding. This ensures that the dispersant is evenly distributed and effectively adsorbed onto the pigment particles, maximizing its performance.

## 7. Conclusion

RD-9617 is a high-performance polymer dispersant that offers exceptional dispersion efficiency, versatility, and viscosity reduction in solvent-based coatings and ink systems. Its ability to enhance pigment dispersion, stability, and application properties makes it an invaluable additive for formulators in the coatings and ink industries. By incorporating RD-9617 into their formulations, manufacturers can achieve superior product performance and meet the demands of high-end industrial paints, inks, and color paste systems.