Mg-Al-based hydrotalcite-type particles, chlorine-containing resin stabilizer and process for producing the particles

摘要

Mg-Al-based hydrotalcite-type particles suitable as a stabilizer for chlorine-containing resins comprise:(a) Mg-Al-based hydrotalcite-type core particles represented by the composition formula:        Mg_1-x·Al_x·(OH)₂·A^n-_p·mH₂Owherein 0.2≤x≤0.6; p=x/n; A is an n-valent anion; and m is more than 0 and not more than 1; and(b) a coating layer on each Mg-Al-based hydrotalcite-type core particle, which comprises at least one compound selected from higher fatty acids, organosilane compounds and rosins; and having:(c) a plate surface diameter of from 0.3 to less than 1.0 µm,(d) a thickness of from 0.02 to 0.08 µm,(e) a heat-resisting time of not less than 160 minutes.