PHOTODEGRADATION OF THE BIOCIDE 1, 2·BENZIOTHIAZOLIN·3-0NE USED IN A PAPER·BASED JOINTING MATERIAL

A paper-based jointing (gasket) material proofed with a biocide containing I, 2-benzisothiazolin-3-one lost its ability to resist mould growth after three monthsʹ storage exposed to sunlight. Exposure of the active ingredient to either natural or simulated sunlight caused changes in the absorption spectrum after one month and one week respectively. The role of accelerated weathering regimes in the selection of biocides for protection of stored materials is discussed.