The role and important indicators of carbon black in paints and coatings

"The role of carbon black in paint is pigment carbon black, which is widely used in building, automotive, and marine paint, or as a toner. Pigment carbon black has advantages in coloring power and price, and has become an indispensable black pigment in the paint industry.".

1、 Carbon black can improve the ability to absorb ultraviolet rays.

2、 Carbon black improves gloss.

3、 Carbon black can improve the leveling performance of paints and coatings.

4、 Carbon black can improve the durability of paints and coatings.

Some indicators of carbon black for paint and coating:

1、 Blackness of carbon black: The requirements for blackness of carbon black vary under different actions, for example, when used for coloring, the higher the blackness of carbon black, the better. When used as a toner, high blackness can easily lead to color differences in different batches of products, so carbon black with lower blackness can be selected.

2、 Coloring power of carbon black: Also known as coloring strength, when different pigments are mixed with carbon black, the coloring power displayed by carbon black can improve the absorption of light. This indicator depends on the proportion and the properties of carbon black itself. The smaller the particle size of carbon black, the lower the structure, and the stronger the coloring power, but when the limit is reached, this ability becomes weaker.

3、 The color phase of carbon black: The particle size and structure of carbon black can affect it. Low structure and fine particle size can produce a blue phase, while high structure and coarse particle size can produce a brown phase.

4、 Gloss of carbon black: When the particle size of carbon black is small or high in structure, the oil absorption amount of carbon black increases, and the viscosity of paint and coating also increases. When the film forming material of the coating decreases, the gloss decreases.