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Heat-resistant inorganic yellow pigments for high-performance polymers | Plastic Technology

Lanxess Colortherm Yellow pigment based on iron oxide and zinc oxide is designed for cost-effective coloring
Two new yellow inorganic pigments for high-performance polymers have been added to the Colortherm Yellow pigment series of LANXESS in Pittsburgh, Pennsylvania. Colortherm Yellow 5 and Yellow 26 are based on iron oxide and zinc oxide, respectively, and are specifically designed for cost-effective coloring in the temperature range between 220 C/428 F and 260 C/500 F.
According to reports, they have the same high color intensity in the same color space, providing plastic manufacturers and processors with an excellent compromise between the first-class Colortherm Yellow 20 and Colortherm Yellow 30 products, with a thermal stability of up to 300 C/ 572 F. Stability as a quality factor “plastics” can now be used in applications that were considered impossible a few years ago. With the increasing use of high-tech plastics in high-tech applications, the demand for pigments for coloring is also growing. In particular, the thermal stability of colorants is becoming a decisive quality factor. For organic pigments, high processing temperatures usually lead to accelerated decomposition; however, inorganic alternatives will undergo color changes at temperatures above 180 C/356 F.
For the reliable yellow coloration of high-temperature polymers, LANXESS now offers the modular Colortherm Yellow product range. It contains iron oxide Colortherm Yellow 5 and Colortherm Yellow 20 and Colortherm Yellow 26, Colortherm Yellow 30 and Colortherm Yellow 3950 zinc ferrite. This range covers not only the color spectrum of light, saturated yellow tones, but also orange tones. Therefore, according to LANXESS, plastic formulations can be easily achieved at processing temperatures up to 300 C/572 F.
Due to its special manufacturing process, the color strength of Zinc Ferrite Colortherm Yellow 26 and Colortherm Yellow 30 is 20% higher than similar products. This means that a correspondingly lower level of pigment addition is required to color the plastic.
Stefano Bartolucci, Plastics Global Marketing Manager of the Inorganic Pigments Business Unit, said: “Our Colortherm Yellow product line is characterized by a high degree of flexibility in pigment selection. Depending on the type of plastic, the pigments used may imply different degrees of thermal stability- Or, to be more precise, it is sufficient. For example, in the case of coloring PE, it is sufficient that the pigment used does not show any color change at a processing temperature of about 240 C/464 F. However, for the use of nylon, For PP and PPS applications, a thermal stability of about 300 C/572 F is essential. By expanding our Colortherm Yellow special pigment series, we allow processors to choose the pigments that suit them. These pigments can be colored according to the The type of plastic and the necessary thermal stability are customized.”
To be successful in Detroit, it is not enough that polypropylene-based TPO elastomers have the characteristics of low cost, light weight, ease of processing and recyclability. They must also maintain a good appearance for the life of the vehicle.


Post time: Oct-12-2021