Pentaerythritol is mainly used in the coatings industry, can be used to manufacture alkyd resin coating, can make the coating film hardness, luster and durability.It also USES up with anger paint, lacquer and printing ink of pine resin needed raw materials, coating and drying oil, smoldering sex and aviation lubricating oil and so on.
Pentaerythritol Pentaerythritol,Pentaerythritol 115-77-5,Pentaerythritol Msds,98% Pentaerythritol Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com
Also used in medicine, pesticide and so on production.Pentaerythritol molecules containing four hydroxymethyl equivalent, with high symmetry, so the production raw material is often used as multifunctional compound
By its nitrification can produce pentaerythritol tetranitrate (taian, PETN), is a kind of high explosives;Esterification available pentaerythritol three acrylate (PETA), used as a coating.
Park clearing is a big mistake
At the moment, the greenhouses have grown to late spring and late spring, and vegetable growers have begun to pull out the garden. However, during the interview, the reporter found that many vegetable farmers had plans to facilitate the drawing of the garden and the garden had been left unclear. Some vegetable farmers had even cut off the trees and left a large number of roots in the soil. This violated the purpose of “clean gardens†to prevent pests and diseases. When the reporter interviewed Liu Chenglong, master of the old building, Lao Zhuangcun, South Building, Shangkou Township, Shouguang City, Master Liu was interpreting the nylon rope and putting the dried stalk on the ground. The reporter saw that the loofah vines in the shed had already dried up. And there are many things like spider webs at the connection of these nylon ropes to the wire. After careful inspection, make sure that this is the web of red spider knots. After the exchange, it was learned that the original loofah loft of Master Liu was not able to control Starlings in time, resulting in an outbreak of insect pests and pulling out the park early. However, he only pulled the tree out and did not clean it out of the booth in time. After a few days, When the debris was cleared again, a large number of red spider webs were found on the nylon rope. The reporter believes that pulling out of the park is not a clear mistake for pest control. Such as Liu Shifu, for the convenience of the map, clearing the garden after the trees are dry, make the insects and other insects have plenty of time to hide or sleep dormancy, adults, eggs, etc. fall to the ground or into the soil, increasing the difficulty of prevention , laying a hidden danger to the next vegetable management. Of course, not only is this a kind of pest of red spider, and in recent years, small pests such as whitefly and hummer, as well as various diseases, have been able to sneak into the soil or produce spores when encountering harsh environments such as high temperatures, thereby increasing resistance to harsh environments. ability. The correct approach should be: Immediately after pulling the garden, remove the trees from the shed, and clean up all the mulch and weeds in the shed. Then, use high-temperature stuffy sheds or chemical fumigation to kill pathogens to the maximum extent and reduce the number of worms. To the minimum, reduce the threat to the next vegetable. Another common mistake in drawing gardens is that some vegetable farmers have only cleared stems and vines, and a large number of roots remain in the soil. This is also a mistake. Because there are a large number of harmful pests in the soil, after the death of the root system, it will multiply in the remaining root system, and become the “boil†of the next vegetable. In particular, various root diseases such as root rot, stem rot, bacterial wilt, blight, and root knot nematodes have already occurred, and root systems must be thoroughly cleaned. In the severe greenhouses with root-knot nematodes, it is important to pay attention to them. It is an excellent opportunity to eliminate root-knot nematodes at the time of gardening. This opportunity can be used to bring root-knot nematodes attached to the roots to the surface, using high-temperature stuffy sheds or chemical treatment. Easily kill root-knot nematodes. There are fewer plant residues in the soil, and naturally fewer pathogens are attached to them, which can greatly reduce the chance of infection of diseases and insect pests in the next crop. After removing the garden, the roots in the soil are promptly removed, and the amount of self-toxic substances in the soil can also be reduced, thereby reducing the harm caused by the heavy carp. Therefore, it is best to pull all the roots out when the vegetable is pulled out. If the soil is dry, you can pour a little water before pulling the garden to moisten the soil and make it easier to pull out. If necessary, shovels can be used to remove a large number of fibrous roots that remain in the soil. In addition, it is best to mark the diseased plants before pulling out of the garden. After removing the garden, focus on the use of quicklime and disinfectants to remove the germs.