Process for the development of an environmentally desirable raw material based on woad (isatis tinctoria L.)

摘要

The invention relates to a method for producing environmentally and health-friendly paints for wood and building protection on a woad basis. Dyer woad (Isatis tinctoria L.), an old crop, originally grown and processed for textile dyeing, also contains fungicidal and insecticidal ingredients that allow the production of building protection products. The ongoing trend towards environmentally friendly natural products, health-conscious product use and the advantages of ecological regional development are seen as basic requirements for the successful marketing of woad products. Increasing allergies and occupational diseases in the construction and painting sector predestine Färberwaid as a natural raw material supplier with anti-allergic properties. The current use of wild straw juice as a grung layer for wood and building protection agents has the disadvantage of unpleasant odors. This problem is due to the biodegradation of the woad ingredients, including the active ingredients, by the plant's own and microbial enzymes. By adding hydrogen peroxide, an odorless raw wild juice can be obtained while maintaining the fungicidal and insecticidal action. At the same time, the number of live germs is reduced to zero. This addition leads to a stabilization of the raw woad juice as a starting product for impregnation, glazes and coats based on woad.