The development of heat stabilizers

The global environmental protection requirements are becoming increasingly strict, and human demand for environmental purification, which is essential for survival, is becoming stronger. The regulatory pressure to restrict the use of heavy metal heat stabilizers is intensifying, accelerating the development and production of heat stabilizers towards non-toxic, efficient, and multifunctional directions. Wuxi, low lead, low dust, and alternative lead salts have become the focus of the development of heat stabilizer varieties worldwide. There are relatively few new chemical substances introduced as stabilizers, while composite stabilizers are ubiquitous.
The development trend of various stabilizers is as follows.
(1) Lead salt dust-free is the most basic requirement, and low lead is required by the environment. Given the outstanding performance of lead salts in pipes and insulation materials, the process of lead-free development is slow worldwide. The true exit of lead salts from the historical stage requires the emergence of new lead-free products with excellent performance price ratios, strengthened environmental regulations, and time.
(2) Methyl tin products with excellent organic tin properties have made great progress, especially in China. China has multiple patents in the field of methyl tin, and in recent years, Shenzhen Fansheng and Hubei Nanxing have made remarkable efforts in the production and promotion of methyl tin. Starting from the raw material tin, Fansheng Company has adopted its own patented technology and mastered the key technology of producing 6000 tons of methyl tin annually. It has also developed a new reverse cool type organic tin compound, marking that China's production of organic tin has reached a high level. At present, the vigorous development of organic tin stabilizers in China has made the structure of heat stabilizers more reasonable, and there are no technical obstacles. What is needed is guidance from policies and regulations.
(3) Metal soap non-toxic calcium/zinc stabilizers have a very broad development space, and calcium/zinc stabilizers have been used in large-diameter pipes and insulation fields abroad. However, there is not enough attention paid to the development of composite metal soap in China, and there is a lack of high-performance auxiliary stabilizer varieties. Compared with foreign countries, the contrast is significant. The development of high-performance composite metal soaps relies on high-performance auxiliary stabilizers.
(4) Rare earth stabilizers are heat stabilizers with Chinese characteristics and have a strong development momentum. At present, more than 10 domestic manufacturers and research institutions are involved in the development of rare earth stabilizers. Manufacturers in Baotou and other places have seized the opportunity of China's large-scale development of the western region and plan to build large-scale rare earth stabilizer bases. However, most of the rare earth stabilizers currently launched are composites of rare earths and lead salts, which can only be used as a transitional product for low lead conversion. The widespread use of rare earth stabilizers still needs to address the issues of insufficient lubricity and processability.
(5) Pure organic compounds and stabilizers have received attention as substitutes for metal stabilizers. Ciba Refining, Morton and other companies have successively launched pure organic compound varieties represented by amino based chalcones. Compared with metal stabilizers, pure organic products are environmentally friendly and are expected to play a huge role in replacing toxic heavy metal stabilizers.
(6) New compounds used as heat stabilizers in other products in recent years include hydrotalcite series, perchlorates, etc. Ciba Jiaji Company combines perchloric acid and its salts with epoxy compounds and antioxidants in PVC, achieving excellent heat resistance and color change resistance; The hydrotalcite series launched by Japan's joint pharmaceutical company is a magnesium/aluminum composite used in combination with fatty acid zinc for PVC, which can prevent coloring of the compound; The Southern Chemical Company in Germany has built a production facility with an annual output of 5000 tons of talc and possesses patented technology. As a completely harmless additive to the environment, hydrotalcite has broad application prospects.