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US 4,067,847 AGranted
Self-extinguishing resin composition
AssigneeMitsubishi Petrochemical Co., Ltd.
InventorsHiroshi Yui, Saburo Moriwaki, Yukihiro Ichikawa, Shigekazu Ohi
Life of this patent
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Abstract
A self-extinguishing resin composition comprises 55 - 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein said magnesium hydroxide has a specific surface area of less than or equal to 45 m.sup.2 /g. Such a composition is not subject to formation of a silver-colored streak upon being extrusion- or injection-molded.
Claims7
A self-extinguishing resin composition which prevents the formation of a silver-colored streak when extrusion-molded or injection-molded which comprises:
- 5- 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein when said resin is extrusion-molded, the specific surface area of magnesium hydroxide is selected within the ranges of 38 - 45 m.sup.2 /g when said resin has a melt index of more than 8 g/10 minutes;
- 40 - 33 m.sup.2 /g when said resin has a melt index of 8 - 4 g/10 minutes;
- 36 - 28 m.sup.2 /g when said resin has a melt index of 4 - 1 g/10 minutes;
- and
- 35 - 25 m.sup.2 /g when said resin has a melt index of 1 - 0.1 g/10 minutes;
- and wherein,
- when said resin is injection-molded, the specific surface area of magnesium hydroxide is selected from the ranges of 30 - 22 m.sup.2 /g when said resin has a melt index of more than 10 g/10 minutes;
- 25 - 18 m.sup.2 /g when said resin has a melt index of 10 - 6 g/10 minutes;
- 22 - 10 m.sup.2 /g when said resin has a melt index of 6 - 3 g/10 minutes;
- and
- less than 20 m.sup.2 /g when said resin has a melt index of 3 - 1 g/10 minutes.
8 more elements
Dependencies are inferred from the claim text.