PROCESSING AIDS | ADDITIVES
predominantly derived from acids and alcohols in the C26 – C30 range.
Speciality chemicals company Clariant is another leading supplier of waxes for enhancing processability of commodity and engineering plastics, offering numerous grades in its line-up. These include montan waxes, metallocene-cata- lysed low and medium molecular weight non-polar and polar polyolefins, and amide waxes. The company’s major brands include Licowax, Licolub, Licocene, and Licomont. Earlier this year, Clariant introduced a family of high-performance waxes based on a renewable feedstock that are intended for possible use as alternatives to montan waxes. The Licocare RBW multi-purpose additives are based on crude rice bran wax. This is a by-product from the production of rice bran oil, does not compete with the food supply chain, and is available in large quantities. Use and upgrade of the non-edible component of the oil means that its full value can be utilised, Clariant says. The main target applications for Licocare RBW include engineering thermoplastics and epoxies. Application tests performed by Clariant show
that Licocare RBW solutions can achieve higher performance levels compared to alternative solutions on the market. The two grades targeted at plastics applications – Licocare RBW 300 TP and Licocare RBW 102 TP – fulfil the highly demanding requirements set by the transportation and electrical and electronic industries, according to the company.
Clariant has launched the Licocare RBW prod- ucts for plastics in Japan. “Japan’s highly innovative plastics market, with many players in the fields of engineering thermoplastics and epoxy moulded components, is the perfect arena to establish the new solutions,” the company says. It plans to roll-out the grades in other selected regions in the future; the products will be launched on the Chinese market at Chinaplas in Shanghai later this month.
Licocare RBW 300 TP is a partially saponified
wax, Licocare RBW 102 TP is a medium-polarity wax type. Both Licocare grades are said to be highly effective internal and external lubricants. They also enhance dispersion of fillers and pig- ments at low concentrations, improve melt flow, lower the amount of force required to release parts from moulds, and ensure more homogeneous distribution of additives.
Clariant also says the new additions “offer an outstanding processing stability at elevated temperatures, due to their superior thermal
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stability, very low volatility and low metal content. Licocare RBW offers improved shaping flexibility, better mechanical properties and improved surface finish. This results in a reduced rejection rate and more effective dosage.”
Building on bio Emery Oleochemicals is a long established player in the renewables area, boasting more than 60 years of experience in delivering high-performance additives to the plastics processing industry based
April 2018 | COMPOUNDING WORLD 61
Viscosity [PA-s]
Figure 1: Influence of different waxes on the viscosity of PVC melt Source: Völpker Spezialprodukte
Gloss [%]
Figure 2: Influence of different waxes on the viscosity of PVC melt Source: Völpker Spezialprodukte
Vicat softening temperature [˚C]
Figure 3: Influence of different waxes on the viscosity of PVC melt Source: Völpker Spezialprodukte
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