Pigment for Epoxy Resin - Color Pigment for Epoxy Resin Uses in 2024

1. Organic pigments

Organic pigments are often used for epoxy resin coloring. They have high durability and fade resistance. They also have high color saturation, fluidity and dispersity. Common organic pigments include phosphate dyes, phthalocyanine dyes and COLORTREND 870.

2. Inorganic pigments

Inorganic pigments are often used for epoxy resin coloring. They have heat resistance, corrosion resistance and high gloss. Due to high color stability, they are more suitable for long-term applications. Common inorganic pigments include titanium dioxide, ferrite particles, etc.

3. Pigment thickeners

Pigment thickeners can be used with epoxy resin. They can achieve better coloring effects, and effectively reduce costs.

For the best coloring effects, dedicated pigments are preferred for epoxy resin. In addition, they should be compatible with epoxy resin, and have color complementarity and stability.

Epoxy pigments are colorants. They are particularly suitable for resin dyeing. But they are insoluble in epoxy resin. They may be powder, liquid or paste pigments. Some can cover resin colors, so they have glossy effects. Alcohol inks can maintain the properties of resin. Epoxy pigments should account for 5% to 10% of resin by weight.

Usually, epoxy resin is mixed with pigment by stirring. Curing agents are needed for color epoxy resin. Under normal circumstances, pigments are slightly adjusted by manual mixing or stirring. Intensive mixing may be required for dye mixture in large quantities. Epoxy pigments can be used for unique effects.

Epoxy resin adhesive is a common binder. It is widely used in construction, aviation, automobile, etc. In some special application scenarios, epoxy resin adhesive should be colors, to meet different needs. Common coloring methods are as follows.

1. Coloring with pigments

Pigments are common colorants. An appropriate amount of pigment can change the color of epoxy resin adhesive. Commonly used pigments include pigment powder, pigment pulp and so on. First, the pigment is thoroughly mixed with an appropriate amount of resin. Then, an appropriate amount of curing agent is added. Finally, these materials are stirred. Note that excess pigments may affect the properties of resin adhesive.

2. Coloring with pigment paste

Pigment paste is a kind of liquid to be pre-mixed with resin adhesive. It can be directly added into resin adhesive for coloring. Pigment paste has higher dispersity and stability, to better maintain the uniformity of color. Add an appropriate amount of pigment paste into resin adhesive, and stir them. 

3. 3. Coloring with pigment sheet

Pigment sheets are a kind of solid pigment. They can be melted by heating, and added into resin adhesive for coloring. First, pigment sheets are melted by heating. Then, the pigment is dropped into resin adhesive, and the mixture is stirred. If the temperature is too high during heating, pigment sheets may be deteriorated.

4. Coloring with pigment particles

Pigment particles are a kind of solid pigment. They can change the color of resin adhesive. First, add an appropriate amount of pigment particles into resin adhesive. Then stir them. Note that the particle size should be moderate. Too large particles may affect the fluidity of resin adhesive.

5. 5. Coloring with pigment solution

Pigment solution is a kind of liquid to be pre-mixed with solvent. It can be directly added into resin adhesive for coloring. Add an appropriate amount of pigment solution into resin adhesive, and stir them. Note that the concentration of pigment solution should be moderate. Too high concentration may affect the properties of resin adhesive.

In short, epoxy resin adhesive can be colored with pigments, pigment paste, pigment sheets, pigment particles, pigment solution, etc. Pay attention to the amount and stability of pigment, as well as the properties of colored resin adhesive, to meet the requirements for coloring effects and properties.

Epoxy resin is often colored to change its appearance and properties. There are two common coloring methods: adding pigments or coloring agents, and mixing with varnish.

Pigments are directly added into epoxy resin. They are thoroughly mixed into a finish coat. This can lead to a uniform color, which is not easy to fade. But color deviation and adverse reaction are likely to occur.

Pigments are mixed with varnish. Due to the transparency of varnish, pigments will have bright colors. But the color in this method is less uniform than that in the above method. Compatibility of pigments and varnishes should also be considered.

Epoxy resin is an organic compound. It has good physical and chemical properties after curing. It also has high bonding strength on metallic and non-metallic surfaces. It usually contains two or more epoxy groups. It can be colored for better effects.

How to color epoxy resin?

1. If the color of epoxy resin fades, first use the primary color (large consumption but low coloring power). Then use the dark color with large dyeing power (or conduct coloring) slowly and intermittently. Observe color changes while stirring. The light color should changeto a dark color. Do not add excess pigment with large coloring power.
2. First, understand the floating of primary color of epoxy resin in multi-color paint, as well as changes in paint. Pay more attention to amino paints and vinyl perchloride paints.
3. There are minor differences between the colors of paints and dry films. Paints are light-coloredin the wet state. Dry films have darker colors. Dry samples arecompared with dry films. Wet samples are dropped into paints. Check whether they have the same color. 
4. Use paints with the same propertiesto prepare multi-color paints. Solvents should be compatible. Otherwise, poor compatibility may affect the quality of epoxy resin. It may also lead to stratification, precipitation or gelation. 
5. Some auxiliary materials may be needed in coloring, such as dryers, curing agents and thinners, to avoid the impact on color.