High Efficient,environment friendly PVC heat stabilizers were prepared by microcapsulation technology using PVC as wall material,water talc and calcium / zinc compound heat stabilizers as core materials.The PVC heat stabilizers' best microcapsulization technics were discussed.The results showed that the solid content of the microcapsules was 15%,when the mixing speed was 600r/min,stirring time was 160min,the ratio of solvent tetrahydrofuran to non-solvent glycol was 5∶3,the amount of emulsifier Span80 was 3...