Mg-Al-based hydrotalcite-type particles, chlorine-containing resin composition and process for producing the particles
A chlorine-containing resin composition for covering an electric wire of the
present
invention, has a heat stability of not less than 240 minutes and a volume resistivity
of 5.01013 to 1.01016 cm when measured
according to JIS K6723, and comprises:
100 parts by weight of a chlorine-containing resin, and
1.5 to 10 parts by weight of Mg-Al-based hydrotalcite-type particles
having a composition represented by the formula:
wherein 0.2z/(x+z)0.6; 0.01y/(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 m and
a thickness of 0.02 to 0.08 m, 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 having a heat-resisting time
of not less than 4 hours upon a chlorine-containing resin composition containing
the Mg-Al-based hydrotalcite-type particles.
