Specialist desiccants and additives used in a wide range of applications
Innovox Calcium Oxides
Innovox calcium oxides are powerful desiccants that can alleviate problems such as porosity or surface blisters, which develop during the processing of elastomeric compounds. These problems arise due to the presence of moisture.
Moisture can be present in raw materials e.g. fillers. As little as 0.02% moisture can cause porosity in the end product if it is allowed to expand freely into water vapour during extrusion or heating processes. In many cases, the addition of Innovox is the only solution to eliminate porosity.
Innovox microfine powders disperse easily and evenly throughout the product mix to give consistent results. Addition rates depend on formulation and local conditions.
Birch Chemicals is unique in that we have an integrated supply chain which gives Innovox products unrivalled performance due to their consistency, control and traceability.
Mode of action
Calcium oxide reacts exothermically with water, generating heat and converting to calcium hydroxide. The calcium hydroxide formed acts as an inert filler in the end product. Innovox high activity calcium oxide will chemically bind up to 32% of its own weight in moisture.
The decomposition temperature of calcium hydroxide is approximately 530°C, well above the typical processing and service temperatures of rubbers.
Available locally from our network of global distributors.