1, lead salt stabilizer, such as trivalent lead salt, divalent lead salt, etc.
2. Metal soap stabilizers, such as zinc stearate, cadmium stearate, calcium stearate, zinc stearate, etc.
3. Organotin is stable, such as dibutyltin dilaurate and dibutyltin dimaleate.
4. Rare earth stabilizers, such as antimony thiolate and antimony carboxylate.
5. Organic auxiliary stabilizers, such as phosphites, epoxy compounds and polyols.
6, hydrotalcite stabilizer, such as hydrotalcite calcium zinc stabilizer.
Development of heat stabilizer;
1, lead salt dust-free is the most basic requirement, and low lead is forced by the environment. In view of the excellent performance of lead salt in pipes and insulating materials, the lead-free process in the world is slow. It will take time for lead salt to really withdraw from the historical stage, which requires the emergence of new lead-free products with excellent performance-price ratio and the strengthening of environmental protection laws and regulations.
2. methyl tin products with excellent organotin properties have been greatly developed, especially in China. China has a number of methyl tin patents. In recent years, Shenzhen Fansheng and Hubei Nanxing have made fruitful efforts in the production and promotion of methyl tin.
3. Non-toxic calcium/zinc stabilizer for metal soap has a very broad development space, and calcium/zinc stabilizer has been used in large-diameter pipelines and insulation fields abroad. There is not enough attention to the development of composite metal soap in China, and there is a big gap with foreign countries because of the lack of high-performance auxiliary stabilizers.
4. Rare earth stabilizer is a heat stabilizer with China characteristics, which has a strong development momentum. At present, there are more than 10 domestic manufacturers and scientific research units involved in the development of rare earth stabilizers. Manufacturers in Baotou and other places seize the opportunity of China's western development and plan to build a large-scale rare earth stabilizer base.
5. Pure organic compounds and pure organic stabilizers, as substitutes for metal stabilizers, have been paid attention to. Ciba Specialty Chemicals, Morton and other companies have successively introduced pure organic compounds represented by aminodiketones. Compared with metal stabilizers, pure organic products are environmentally friendly and are expected to play a great role in replacing toxic heavy metal stabilizers.
6. New compounds used as heat stabilizers for hydrotalcite-like stabilizers include hydrotalcite series, perchlorate, etc. Ciba Jiaji Company used perchloric acid and its salts, epoxy compounds and antioxidants in PVC, and obtained excellent heat resistance and discoloration resistance.
Refer to the above? Baidu encyclopedia-stabilizer