Patent ID: 6919396
Filing Date: 2005-07-19
Classification: C01F,C01G,C01P,C08K,C09C,H01B

Abstract:
1. A stabilizer for chlorine-containing resins, comprising Mg—Al-based hydrotalcite particles having a composition represented by the formula: [Mg x Ca y ]·Al z ·(OH) 2 ·A n− p .mH 2 O wherein 0.2≦z/(x+z)≦0.6; 0.01≦y/(x+z)≦0.20; x+y+z=1; p=2(x+y−1)=3z/n, A is a n-valent anion; and m is more than 0 and not more than 0.75, having a plate surface diameter of 0.1 to 1.0 μm and a thickness of 0.02 to 0.08 μm and containing calcium at a molar ratio of Ca to a sum of Mg and Al of 0.01:1 to 0.20:1, and showing a heat-resisting time of not less than 4 hours.