An agent that prevents wood from rotting during storage. Commonly used reagents are asphalt, coal tar and pentachlorophenol. With the development of economy and the enhancement of people's environmental awareness, wood protection technology is facing new opportunities and challenges. Developing wood preservatives with low toxicity, high efficiency, no environmental pollution, selectivity and economy is the key problem to be solved urgently in this industry. At present, the development of wood preservatives has the following characteristics:
1. The use of copper in fungicides is an important trend. Copper is widely used in wood preservatives because of its good effect of inhibiting fungi, good antiseptic effect, moderate price, soft environment and harmless to human and animal.
2. The development of new wood preservative by the method of compound fungicide has the advantages of wide spectrum and less use. However, a large number of screening experiments are needed for the compound configuration of bactericides with excellent performance.
3. The development direction is to use preservatives with covalent bond fixation mechanism with wood components. In this way, the preservative can form a stronger chemical bond with each component of wood, reduce its loss and improve the long-term effect of preservative.
4. The anticorrosion Department generally selects and develops excellent wood preservatives from the long-acting insecticides and preservatives of related industries, which can reduce the research cost and development cost. It has been proved that the formulation of various wood preservatives is very environmental friendly and the anticorrosion effect is good, such as isu30 and isu40 of Shanghai Omer Chemical Co., Ltd.
5. The extraction of plant chemical components with natural antiseptic properties and the development of biological antiseptic are the important characteristics of wood preservatives in the 21st century, but the determination of effective components and the cost of a large number of extraction are the main problems faced by industrial production of such preservatives.