High-speed extruded calcium-zinc compound stabilizer

Abstract

The invention discloses a high-speed extruded calcium-zinc compound stabilizer which comprises the following components in parts by weight: 18-35 parts of polyol ester of polycarboxylic acid, 10-25 parts of zinc stearate, 2-10 parts of calcium stearate, 3-20 parts of hydrotalcite, 10-20 parts of 4A zeolite, 5-20 parts of an internal lubricant, 6-25 parts of an external lubricant, and 0.2-5 parts of an antioxidant. Compared with the prior art, the high-speed extruded calcium-zinc compound stabilizer disclosed by the invention has the following characteristics that 1, the continuous production cycle is long, and can be comparable to that of compound lead salts; 2, the performance price ratio is high, and the cost is competitive with that of compound lead salts; 3, the production stability is excellent; 4, the stabilizer does not contain heavy metals such as Ba, Cd and Pb and the like, therefore, the stabilizer is nontoxic and environmental-friendly; and 5, the stabilizer is suitable for high speed extrusion. According to the invention, the problems that for a long period, calcium-zinc compound stabilizers are short in production cycle, poor in production stability, incapable of meeting the requirements of high speed extrusion, and high in application cost are solved.

Description

Technical field [0001] The invention belongs to a composite stabilizer, in particular to a calcium-zinc composite stabilizer used for PVC plastic profiles, pipes, plates, foamed plastics, and wood plastics. Background technique [0002] As a necessary additive in the process of PVC processing, heat stabilizers have developed with the development of PVC products, from the initial monomer cadmium and lead stabilizers to composite lead stabilizers, and then to calcium zinc, barium zinc, and organic Tin stabilizers are gradually moving towards environmental protection and greening. [0003] Compared with traditional lead salt stabilizers, the thermal stability of general calcium and zinc stabilizers is difficult to reach the corresponding level, and the lubrication system is more difficult to adjust. The selection of raw materials and system design will cause poor initial coloring ability, "zinc burn", The short period of precipitation and mold cleaning seriously affects its processin...

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Problems solved by technology

[0003] Compared with traditional lead salt stabilizers, the thermal stability of general calcium-zinc stabilizers is difficult to reach the corresponding level, and the lubrication system is difficult to adjust. A slight inappropriate selection of raw materials and system design will lead to poor initial coloring ability, "zinc burning", The short period of precipitation and mold cleaning seriously affects its processing performance, resulting in short continuous production and operation cycle of general calcium zinc stabilizers, poor production stability, and it is difficult to meet the requirements of high-speed extrusion, so that the application cost of calcium zinc stabilizers remains high. Before there is no mandatory ban on lead, the large-scale promotion of the application of calcium-zinc stabilizers is relatively resistant

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