Currently in North America, organic tin stabilizer is the main, while European countries are mainly calcium and zinc compound stabilizers, and the amount of tin content in plastic products is restricted (allowed to be 0.002mg/kg). But as a result of organotin is highly effective stabilizers, transparent and no poison (low) liquid, adding only 0.25% - 0.25% in PVC pipes, so there are still 20% of Europe's share of the stabilizer are organic tin stabilizer.

In the mid-1950s, China began to produce thermal stabilizers with the domestic production of PVC production technology. At that time, there were only alkali lead salt and stearic acid soap. In the early 1960s, the production of thermal stabilizer was developed, the production technology of gm variety was improved, and the quality inspection and standardization of products began to be taken seriously. After decades of development, research, production and application, at present, the heat stabilizer has grown to become the second categories of products of plastic additives, its according to the chemical composition and the role of the main can be divided into lead stabilizers, calcium zinc stabilizer, organic tin stabilizer, auxiliary stabilizing agent, etc.

Lead salt stabilizer is a kind of thermal stabilizer with the longest history and good effect. It is widely used in PVC profiles, pipes and insulating cables. Alkaline lead salt is the most widely used lead stabilizer. Lead stabilizer has good heat resistance, especially long-term thermal stability. Excellent electrical insulation; It has the properties of white pigment, with great coverage and good weather resistance. It can be used as a foaming agent and its price is low. The disadvantages of lead stabilizer are: the obtained products are not transparent; Toxicity; It has initial coloration; Poor compatibility and dispersion, easy to produce sulphur pollution.

Calcium zinc stabilizer is a kind of avirulent environmental protection heat stabilizer and has good lubricity, but its thermal stability is not high, more than for a long time without too much requirements of thermal stability of PVC soft products or occasionally used as auxiliary heat stabilizer. In recent years, with the development of organic auxiliaries such as beta-diketone, polyol, epoxide and so on, calcium and zinc composite thermal stabilizers have also been developed. At present, a variety of high performance calcium and zinc composite thermal stabilizers have been developed, and used in profile, plate and pipe.

Organic tin compounds are highly effective thermal stabilizers, especially for hard products requiring high transparency and high heat resistance. They often play a photochemical, force of chemical and biological chemical stabilizer, plasticizer and other functions, is widely used and replace other thermal stabilizers, but its price is higher, to a certain extent restricts their application of people trying to tin to replace other heat stabilizer, at a low price to meet the needs of the price and performance.

Organic auxiliary heat stabilizer is one of the research directions. As early as 1940, the derivatives of diphenylthiourea, a phenylindole and other urea were recommended to stabilize PVC. However, as a result of a variety of willing not to be widely used. In recent years, because of the attention to metal stabilizers such as lead, cadmium toxicity and pollution is more serious, the organic stabilizer again aroused people's attention, people want to work out effective non-toxic new varieties. The organic auxiliary stabilizer does not have the thermal stability, but it can improve the efficiency of the thermal stability system. These are the organic phosphates, epoxides, antioxidants, polyols, etc.

Over the past ten years, the consumption of thermal stabilizer in China has increased greatly with the rapid development of PVC industry. According to incomplete statistics, in 2008, the product structure of thermal stabilizer in China accounted for 40.0% of the lead salts, and the stearic acid salts accounted for 17.14% and 27.43%(partially leaded) organic tin, 6.86%, rare earth and 8.57%.