What Properties Should Organic Pigments For Rubber Products Have

Pigment red 169 supplier said, most of the rubber items are black, grey or white and other non-colorful colors, in addition, there are many rubber products are colored, such as yellow, blue, red, purple, orange and so on. General rubber products we often use organic pigments, inorganic pigments and dyes to color.

Then, what properties should the organic pigments used in rubber products have?
● Organic pigments in the rubber medium must have good dispersibility and high coloring power and hiding power, only excellent easy dispersibility can make the products have bright colors and high coloring power, which can shorten the production time of rubber products, thus reducing energy consumption and production products, and improving production efficiency.

● Organic pigments used in the production of rubber products, but also must have excellent heat resistance and stability, so that the colorant can always keep the color unchanged in the process of heating and molding in the production of rubber products.

● It must also be resistant to vulcanization reaction, and the colorant does not react with vulcanizing agent and accelerator. Certain inorganic pigments contain chrome yellow lead or lead pigment which reacts with sulfur to produce PBS and turns black. Therefore, organic pigments should have the performance of sulfurization resistance to prevent the blackening reaction in the production of colored rubber products.

● In the production of rubber products for outdoor use as building materials, the organic pigments used need to be weather resistant to chemical reagents, acid, migration, alkaline and water resistance, so that they can be used outdoors to avoid fading.

● Does not affect the anti-aging properties of rubber products, certain metal salts such as Cu, Mn can accelerate the aging of rubber, reducing mechanical strength.

● Non-toxic, used for children’s toys, food containers, medical appliances rubber products coloring agent should not contain toxic substances.

Although the cost of organic pigments is much more expensive than inorganic pigments, the color of rubber products after coloring with organic pigments is brighter and cleaner. Sometimes organic pigments are difficult to disperse in rubber compounds and are more dusty to apply, so in practice organic pigments are usually used as rubber color master mixes.