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Innovox Calcium Oxides
Innovox calcium oxides are powerful desiccants that can alleviate problems which develop during the processing of elastomeric and thermoplastic compounds due to the presence of moisture. Moisture can be present in raw materials e.g. polymers (especially hydroscopic types such as ABS, polyamides etc.), fillers and plasticisers. As little as 0.02% moisture can cause porosity in the end product if it is allowed to expand freely into water vapour at polymer processing temperatures.
Whilst pre-drying raw materials can help, this is often an expensive and time consuming process, and the use of vented processing does not always solve the problem entirely. In many cases, the addition of Innovox remains the only solution to eliminate porosity.
Mode Of Action
Calcium oxide reacts exothermically with water, converting to calcium hydroxide. The decomposition temperature of calcium hydroxide is approximately 530°C, well above the typical processing and service temperatures of plastics and rubbers. The calcium hydroxide, so formed, will act as an inert filler in the end product. High activity calcium oxides such as Innovox will scavenge up to 32% of their own weight in moisture.
Product Grades Available
Innovox calcium oxide grades are available in 1000kg bulk bags, 25kg poly-lined bags and pre-weighed sachets or pails. Low-melting point sachets are available for direct addition to rubber compounding equipment.
Customer-specified options (sachet type/printing/labelling etc.) can be accommodated in many cases.
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