Cationic curing RC silicones

In order to complement our well established TEGO^® RC silicone acrylates, we also offer epoxy silicones. They are represented by the new TEGO^® RC 1400 Series. The cationic product range includes easy, controlled and tight release polymers and a photo catalyst.

Generally, cationic photo catalysts are sensitive to impurities in the substrate and to humidity. Careful selection of a suitable substrate is necessary i.e. substrates which contain no ingredients that may poison the catalyst. The curing is initiated by UV radiation and exhibits some post-cure until the reaction is complete. Cationic curing takes place in a normal atmosphere, therefore nitrogen inerting is not required. They can be cured with standard UV equipments as used in the printing industry. This is the cationic system’s main advantage over free radical curing silicones. Therefore, cationic UV siliconizing is often the first choice when standard release values are required on suitable substrates.

Benefits of cationic curing 

• No nitrogen inerting required 
• Very simple UV curing units 
• Low extractables