COLOUR | PIGMENTS
Above: Consumer durables such as power tools are a key target market for the latest Keyplast colorants
in these resins. “At first, many thought this problem to be related to the high heat processing require- ments for nylons,” says Shaw. “But subsequent research revealed that normal colorants, both pigments and dyes, react with the amide system and [discoloration occurs] due to the loss of conjugation in the colorant molecule.” Polyamides are often used in consumer durables
that require precisely controlled coloration. “Through continued research and development, Milliken has now developed Keyplast Resist to allow it to be used effectively with all grades of polyamide, including PA 6, 66, 46, 11 and 12,” says Shaw. The new high-purity materials are claimed to offer improved weather resistance and light fastness, and perform well in the high-temperature and chemically-reductive conditions typically associated with high-performance polymers. Adding his thoughts on recent supply difficul-
Rght: PV Fast Pink E is the first in a range of high-perfor- mance
pigments from Clariant that will use renewable raw materials
ties, Shaw says: “Users of such colorants are all too aware of the severe product shortages currently impacting the market. Stricter enforcement in Asia of environmental regulations and manufacturing ef- fluent limits has led to short supply primarily of key colorant intermediates, and even prompted plant closures or drastic cutbacks in production. As a result, for the past few quarters, the colorants market globally has seen unprecedented cost increases, which are impacting all levels of the supply chain. “Milliken, of course, is not immune to these
market pressures, but is working to take a proactive approach regarding customer’s needs,” he adds. Philippe Lazerme, Head of Strategic Marketing Plastics in Clariant’s Pigments Business Unit, says his company, too, is renewing its efforts related to sustainability and the circular economy. “Clariant is quite active in this field and the BU Pigments has developed some products to help the plastics industry achieve the targets,” he says.
20 COMPOUNDING WORLD | September 2018
www.compoundingworld.com
Clariant recently launched PV Fast Yellow H4G, a brilliant greenish yellow pigment containing no halogen in the molecular structure. “It is FDA approved, compliant with EU Regulation 10/2011 on plastics in contact with food, and listed on the Chinese GB 9685-2016 National Food Safety Standard,” Lazerme says. “It displays a very good light and weather fastness. It can be used for the packaging sector but also for outdoor applications and a variety of consumer goods. Its specific characteristics – no halogen in the molecular structure and high light and weather-fastness – fully meets the Circular Economy trend of longer lifetime and recyclability of plastics.” Lazerme also points to Telasperse PVC, the company’s new range of colourants for PVC, which he says provides another contribution to sustain- ability. “Telasperse PVC offers significant advan- tages, especially for the PVC compounding industry,” he says.
“It is a solid pigment preparation in which the pigment is fully dispersed, and it is low dusting. PVC compounders are still dispersing the pigments in-house and very often face dispersion issues and dust development. With Telasperse PVC they will see a significant improvement in their working environment and develop the full colour strength of the colorants, while reducing energy consumption.” Lazerme also points to work his BU is carrying out on developing new high-performance pig- ments using raw materials from renewable sources. The first pigment of this series is PV Fast Pink E, which he says has received positive feedback from the market.
Red alert BASF meanwhile is extending its red pallette. Speaking at Compounding World publisher AMI’s Masterbatch 2018 conference in Madrid at the
PHOTO: SHUTTERSTOCK
PHOTO: CLARIANT
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