Most rubber colors are black, gray, or white, which are non-colors. In addition, there are many rubber products are colorful, such as red, blue, yellow, green, brown, pink and so on.

Rubber products can be colored with organic pigments, inorganic pigments and dyes. Today we will mainly discuss organic pigments for rubber coloring.

Organic pigments can bring bright and attractive colors for rubber. Bright colors can be produced by choosing the right pigments or mixing pigments. Their advantage is to produce a more beautiful appearance of the product.

So,what properties of organic pigment used in rubber products should have ?

① The pigments in the rubber medium should have good dispersion, high strength and hiding power; Excellent dispersibility, make the product have bright color light, high coloring strength, shorten the rubber mixing time, reduce energy consumption.

② Excellent heat stability, colorant should keep the color in the process of heating molding rubber products.

③ Excellent stability of curing resistance, pigments does not react with curing agent and accelerator. Some inorganic pigments chrome yellow lead or lead-containing pigments react with sulfur to produce PBS, and turn black, organic pigments should have sulfur-resistant properties.

④ Good weather fastness, especially outdoor use of building materials rubber products.

⑤ Good resistance to chemical reagents, acid, alkali and water.

⑥ Resistance to migration

⑦ Does not affect the anti-aging performance of rubber products, some metal salts such as Cu, Mn can accelerate the aging of rubber, reduce mechanical strength.

⑧ Non-toxic, used for children's toys, food containers, medical appliances rubber products colorant should not contain toxic substances.

The unit cost of organic pigments is much more expensive than inorganic pigments, but it is necessary to use organic pigments to make the rubber color brighter and cleaner.pigment for rubber

If there is any requirement about pigments used in rubber,please send Email to:  export02@yuhongchem.com          Wechat: zcp15266963990