ADDITIVES | FLAME RETARDANTS
Right: Displays of various types are a potential application for PMMA containing Inovia’s ionic flame retard- ants, which do not affect light transmission
unmodified PMMA. The additives are said to have mild or negligible effects on the physical proper- ties of the plastics. “We are opening up entirely new markets for the
application of PMMA,” says Eric Möller, Product Specialist at Mocom. “PMMA can be used in all areas where installed electronic components require a higher level of flame retardancy. These could be plastic displays on e-charging stations, in cars or on mobile phones and TV screens.” The FR solution was developed in close coop-
eration with additive specialists at LuvoAdd, a business team within the LehVoss Group, which distributes the Inovia flame retardants. Nadia Kursawe, Global Business Team Manager Master- batches and Plastic Additives at LehVoss says the specification for the new material was that V-0 should be achieved without discoloration. In the glow wire test according to GWFI at a temperature of 960 °C, the plastic meets requirements with a layer thickness of 2mm.
Clay PA synergists Following two years of testing, Tolsa says it has been able to transfer its Adins Clay synergists, which are based on organically modified special silicates, to PA-based applications in electrical and electronics, automotive, textile, and transportation markets. The company reports seeing considerable interest in use of the additives in parts intended for EVs. The latest product in the range is Adins Clay 85 (Figure 4). Adins Clay products can reduce Total Heat Release (THR) levels by more than 20% compared
Figure 4: Performance of Adins Clay 85 in PA6 formulations with 15 wt% of phosphinate- based FR
to competitive additive solutions, Tolsa claims. They work in halogenated and halogen-free flame retardant systems and can be considered as an alternative to antimony trioxide. Grades have already been shown to help reduce or even eliminate the ATO content from formulations based on PVC or PP, for example, when combined with flame retardant systems such as ATH or MDH. The synergists promote char formation and
create a physical barrier, protecting the material and reducing heat and smoke emission as well as volatile organic compounds (VOC). The required dosage is low, ranging from 1 to 5% for commonly used formulations. Tolsa now also offers its additives in masterbatch
form. It has started to commercialise products for different systems within the wire and cable sector, including EVA, TPEs and TPU.
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Source: Tolsa 26 COMPOUNDING WORLD | December 2022
www.compoundingworld.com
IMAGE: LEHVOSS
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