PROCESS AIDS | ADDITIVES
derived from crude rice bran wax, a by-product from the production of rice bran oil. Clariant has submitted an application for FDA food contact approval for the entire range of Licocare RBW additives which, if granted, will open up their use in a much wider range of applications. “With these new additives, including renewable- based solutions, in our portfolios, we’re excited to offer plastic processors and value chains more support to collaborate and further innovate together,” says Martin John, Head of Advanced Surface Solutions at Clariant. Another way that processing aids can cut cost is
by improving part quality and durability. “By extend- ing a product’s service life and boosting reuse poten- tial, the plastics industry can contribute positively towards reducing wasteful consumption and increase circularity in key segments. Adopting ways to reduce material waste and energy use in produc- tion brings further sustainability advantages and improves product carbon footprint,” John added.
Easing dispersion Wetting and dispersing additives from India-based Fine Organic’s Finasperse range can enhance dispersion of both organic and inorganic pigments in colour masterbatches and compounds. Chemi- cal functionalities of Finasperse additives are said to improve effective wetting of pigment agglomer- ates through Effective Molecular Interactions (EMI), altering the original pigment-to-pigment interac- tions while maintaining compatibility with the base polymer. Finasperse additives can replace conventional dispersing additives either entirely or partially to offer technical benefits and potential cost savings to masterbatch producers because improved dispersion means less pigment is required to achieve the desired colour strength. The company says, for example, that its Finasperse DT 500 N grade offers higher tinting strength than a typically used dispersing agent at comparable pigment
Moulded samples and colour strength data comparing FinaSperse DT500 wetting agent against non-oxidised PE-wax
Source: Fine Organics
www.compoundingworld.com April 2023 | COMPOUNDING WORLD 47
loading (25%), so equivalent tinting strength can be attained at pigment loading of up to 20%. Finasperse CB 5, described by Fine Organics as
an example of a next generation process enhancer, is a wetting and dispersing additive formulated for black masterbatches and carbon black-based compounds. It has been designed to offer superior wetness with reduced filter pressure value (FPV) and equivalent surface gloss, and features bal- anced functional sites suitable for non-covalent interactions with the carbon black aggregates. Tegomer and Tegopren Organomodified
Siloxane (OMS) products from Evonik are said to have demonstrated suitability as processing aids and lubricants for compounders using single or twin screw extruders, as well as in injection moulding, film, and fibre applications. In particular, the Tegom- er 6810 and Tegomer 6850 grades are said to offer comparable performance to incumbent PFAS. “During compounding, you can expect lower
extruder pressure, die drool, and better distribu- tion of filler and pigments,” says Chris Roland, Evonik’s US Technical Service Chemist. “Post-com- pounding, OMS products provide long-term scratch resistance (Antiscratch L and 100), im- proved mechanical properties, and colour strength (Tegomer DA) as a result of better filler/pigment
Fine Organics’ FinaSperse additive can improve pigment wetting and dispersion Imae: Fine Organics
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