Mg-Al-based hydrotalcite-type particles, chlorine-containing...

Details Mg-Al-based hydrotalcite-type particles, chlorine-containing... Mg-Al-based hydrotalcite-type particles, chlorine-containing...

2005-09-06

2005-09-06

Wu, David W. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S437000, C524S435000

Reexamination Certificate

active

06939909

ABSTRACT:
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 5.0×1013to 1.0×1016Ω·cm when measured according to JIS K6723, and comprises:100 parts by weight of a chlorine-containing resin, and1.5 to 10 parts by weight of Mg—Al-based hydrotalcite-type particles having a composition represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?[MgxCay].Alz.(OH)2.An−p.mH2Oin-line-formulae description="In-line Formulae" end="tail"?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)
; 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 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.

REFERENCES:
patent: 4675356 (1987-06-01), Miyata

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