400 results about "Lead salt" patented technology

The invention provides a Ca/Zn compound heat stabilizer, which is prepared by synthesizing a Ca/Zn main stabilizer by using higher fatty acid, ZnO and Ca(OH)2, matching with hydrotalcite and similar hydrotalcite substances and adding proper amount of auxiliary stabilizer, antioxidant, ultraviolet absorber, lubricant and talcum powder, wherein the Ca/Zn main stabilizer accounts for 40-60 percent, the hydrotalcite and similar hydrotalcite substances account for 7-20 percent, the auxiliary stabilizer accounts for 8-30 percent, the antioxidant accounts for 0.1-2.5 percent, the ultraviolet absorber accounts for 0.1-1.5 percent, the lubricant accounts for 1-15 percent and the calcium powder accounts for 1-15 percent, and the percent refers to weight percent. In the stabilizer, the hydrotalcite and similar hydrotalcite substances are mixed according to a certain proportion, thereby the heat resistance is very good, and the color changing time of Congo red can reach more than 80 min. The stabilizer can effectively restrain the degradation of polrvinyl chloride (PVC) material, which is caused by physical actions during forming and processing, such as heating, rubbing, cutting and the like, and exterior conditions in using process, such as light, heat, oxygen and the like, avoid the degradation or aging of the product and prevent the performance reduction of the PVC products. The invention can replace traditional lead salt and organo-tin heat stabilizer with expensive price, can be widely applied to the aspects of PVC processing and forming, and has remarkable social benefits and economic benefits.