Here are some key points about PU pigments for polyester resin

Polyurethane (PU) pigments for polyester resin are specialized colorants formulated for coloring polyester resin systems. Polyester resin is commonly used in composite materials, such as fiberglass laminates, casting, and molding applications. PU pigments provide a means to add color to polyester resin while maintaining the resin's mechanical and chemical properties. Here are some key points about PU pigments for polyester resin:

1. Compatibility: PU pigments are specifically designed to be compatible with polyester resin systems. They are formulated to disperse evenly within the resin without causing issues such as settling, separation, or interference with resin curing.

2. Color Range: PU pigments come in a wide range of colors, including standard colors like white, black, red, blue, green, yellow, etc., as well as custom colors. This allows for versatile coloration options to meet specific design requirements.

3. Formulation: PU pigments are typically formulated as concentrated liquid dispersions or pastes. These formulations contain high levels of pigment suspended in a carrier liquid, which may be solvent-based or water-based depending on the product and application requirements.

4. Dispersion: Proper dispersion of the pigment within the polyester resin is crucial to achieve uniform coloration and avoid streaking or patchiness. Manufacturers may recommend specific mixing procedures or equipment to ensure thorough dispersion of the pigment throughout the resin.

5. Stability: PU pigments are formulated to provide color stability and resistance to fading, discoloration, or other changes over time. This helps to maintain the desired color intensity and appearance of the finished polyester resin product, even under exposure to environmental factors such as UV radiation and temperature fluctuations.

6. Application: PU pigments are added to polyester resin during the mixing or blending stage of the manufacturing process. The amount of pigment added can be adjusted to achieve the desired color intensity, with higher concentrations resulting in deeper or more vibrant colors.

7. Regulatory Compliance: PU pigments for polyester resin should comply with relevant regulations and standards for safety, environmental impact, and product quality. Manufacturers should ensure that the pigments used in these formulations are approved for use in polyester resin applications and meet regulatory requirements in the regions where the products will be used.

Overall, PU pigments for polyester resin provide a convenient and effective way to color polyester-based composite materials, allowing manufacturers to create customized products with a wide range of colors and aesthetic options.