PIGMENTS | COLOUR
IMAGE: AVIENT/BASF
which is important for applications in building and construction markets. Not all parts in electric vehicles operate at high
voltages. Sun Chemical says its Spectrasense series of functional pigments are finding use in plastic parts for autonomous vehicles that use light detection and ranging (LiDAR) sensors to identify object size and distance by near-infrared radiation (NIR). These pigments can strengthen NIR reflec- tion of plastic parts and enhance the sensitivity and ability of the system to differentiate an object or vehicle from background noise, the company says. Spectrasense pigments are available as NIR
Above: Avient’s Colorant Chromatics division and is working with BASF to bring coloured Ultrason high-perfor- mance
polymers to the global market
EV opportunities The growth in electric vehicle demand is driving an increased need for high-voltage electrical parts, such as connectors, that for safety purposes are required to be coloured bright orange (Pantone Orange 1495C or RAL 2003) to warn of the presence of high voltages. These parts often use high heat-resistant formulations in engineering polymers and several suppliers offer pigments to meet this need. The latest offering in this area from Milliken is a
high-chromatic orange — Resist XTR 9798 — which offers high thermal stability (up to 300°C) and is compatible with other additives in high-perfor- mance polymer formulations, including glass fibres, flame retardants, and heat stabilisers. Meanwhile, Sun Chemical’s Sicopal Orange K2430 and Sicopal Red K3050 are both complex inorganic colour pigments (CICPs) designed to enable match of the target standard shade for high-voltage parts in engineering plastics and high heat polymers. “These pigments deliver a strong orange colour after screening by critical require- ments of polymer suitability, chroma and shade, as well as UV and light, processing, heat aging, and migration stability,” according to the company. Sun Chemical says that while RAL 2003 is
standard for high-voltage applications in Europe even more red shades may be used in Asia. These can be achieved with a combination of Sicopal Orange K2430 in combination with Sicopal Red K3050 FK, which extends the colour space and offers high durability even in shading concentra- tions. “Both pigments are non-migrating and offer excellent heat aging stability due to their high opacity and inorganic character,” it says. The company says both of the pigments also offer high weather and lightfastness properties,
40 COMPOUNDING WORLD | September 2023
transparent types for heat management and laser welding (top layer) applications or as a colourless absorber for transparent laser welding (bottom layer) or colour filter for sensors. Other new pigments from the company include
Microlen Blue 7460 ECO, which extends the bluish colour space for biocompostable polymer applica- tions, and Paliotol Yellow K 1839 FP. The latter is a new and improved version of Paliotol Yellow K 1841 FP offering higher chroma, colour strength and better dispersibility. The new grade meets the need for dispersibility in finer fibre applications as indicated by better filter pressure values (FPV) with a 14-micron sieve test. Avient’s Colorant Chromatics business recently
partnered with BASF to provide a full-colour portfolio for BASF’s Ultrason polyarylethersul- phones (PAES). The companies say this solution will meet demand for various-sized orders with short lead times for multiple areas of application, including reusable household and food industry products, electrical and electronics, and healthcare. “The market requirements for coloured, high- performance polymers are clear: you have to react quickly and also be able to supply various volumes of coloured material,” says Anne Hippert, General Manager, Colorant Chromatics at Avient. “With this collaboration, we can offer the best of both worlds in high-performance polymers. Avient is well- known for its specialised colour solutions, respect- ing the customers’ final application requirements, and BASF is well-known for its excellent Ultrason quality and broad material competency.”
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.lanxess.com �
www.heubach.com �
www.shepherdcolor.com �
www.milliken.com �
www.sunchemical.com �
www.avient.com �
www.basf.com
www.compoundingworld.com
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