Japan's Mizusawa Chemical Industry Co., Ltd. has developed a next-generation stabilizer for polyvinyl chloride (PVC) resin, the biggest feature of which is completely free of metal. The new product is mainly based on the use of an epoxy compound and an amino compound, and has the same performance as the conventional lead-based and non-lead-based stabilizers, and can solve the problem of heat resistance in the conventional processing.
In the case of forming PVC, PVC is used to prevent shrinkage deterioration due to heating, and conventionally, lead-based materials have been used. However, due to environmental regulations, manufacturers have switched to alternatives to non-lead materials. The stabilizer material for PVC has changed from the original lead system to a non-lead tin-based or calcium-zinc system. In addition, European environmental regulations have a tendency to limit the use of heavy metals in automotive, electrical and electronic parts. Therefore, there are manufacturers in Europe that develop stabilizers without heavy metals, but still contain a small amount of zinc, and the heat resistance needs to be improved, so there is no practical use. In order to break through the limitations of use, the company develops new stabilizers that are completely free of metal salts and will promote new products for the market for advanced PVC applications.
The company's newly developed PVC stabilizers use a specific choice of epoxy and amino compounds, both of which have a heat-resistant persistence. It has been confirmed by experiments that the use of new products only needs to be the same as the previous stabilizers. It has the effect of continuous heat resistance for 1 hour at 180~190 °C, and has solved the heat resistance which becomes a problem during the forming of PVC products, and can also suppress it. PVC oxidative decomposition and yellowing.
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