Tablet calcium-zinc stabilizing agent

Abstract

The invention discloses a tablet calcium-zinc stabilizing agent. The tablet calcium-zinc stabilizing agent is prepared from, by weight, 31.25 parts of stearic acid, 1.5 parts of calcium hydroxide, 3.5parts of zinc oxide, 6.97 parts of an auxiliary stabilizing agent, 53.97 parts of a filling agent, 13.25 parts of a catalyst and 0.7 part of water. The tablet calcium-zinc stabilizing agent with calcium and zinc as main elements replace a lead salt stabilizing agent; in a plasticizing process, due to high electronegativity, a conjugate with high bond energy is formed under strong affinity of a polar group and an acute node of PVC resin, and accordingly attractive force of each layer of ionic bonds of PVC is weakened or eliminated, intertwined PVC segments can be easily diffused, boundary of molecular groups is easy to disappear, PVC resin plasticizing is promoted, performances of PVC products are improved, mechanical wear is reduced, and the service life of downstream equipment is prolonged. The stabilizing agent has advantages of nontoxicity, harmlessness and no dust pollution and is high in stability and lubricating property, and the PVC products with high dispersity, compatibilityand smoothness can be prepared.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a flaky calcium-zinc stabilizer, in particular to a flaky calcium-zinc stabilizer used in the PVC industry and artificial leather. Background technique [0002] PVC (polyvinyl chloride) is one of the five largest synthetic resins used in the world. It is a thermoplastic linear polymer produced by free radical polymerization of vinyl chloride monomer. PVC material has the advantages of high strength, low price, good chemical corrosion resistance, good electrical insulation and difficult to burn, and is easy to process. It can be processed by molding, lamination, injection molding and other methods. It is widely used in engineering construction, Hard and soft products in food packaging, electrical and other industries. With the further expansion of application fields, the demand for PVC will continue to increase. [0003] Although PVC has superior performance, due to th...

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Problems solved by technology

[0005] At present, the most widely used stabilizer in the PVC industry is lead sulfate tribasic, generally referred to as lead salt. The effective lead content of lead salt is higher. Although it shows better thermal stability than other products, lead salt The main problems and shortcomings of the stabilizer are as follows: one is that the lead salt stabilizer is poisonous. Due to the high lead content of PVC products produced using the lead salt stabilizer, many countries have revised the lead content standards in drinking water. It is impossible to use lead salts in the environment, and the toxicity of toxic lead salt stabilizers limits its application in many occasions with strict hygiene requirements; second, the stabilizers currently on the market are mainly in powder form, although they are easy to process. However, due to the large amount of dust produced in the processing, the dust will cause greater harm to the human respiratory tract and the environment; the third is that the general lead salt is only attached to the surface of the PVC particles so that the dispersibility of the salt lead is poor, and its effect is equivalent to hindering PVC particles. The fusion will significantly delay plasticization, reduce the friction between PVC particles, reduce the shearing effect in PVC, and reduce the load on processing equipment; if the amount of lead salt is more, the finer the lead salt particles, the more obvious this effect , This has caused the problems of large equipment loss and high machine elimination rate in downstream processing enterprises, and reduced the performance of PVC products, increased mechanical wear, and reduced the service life of equipment