Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1977-11-10
1979-03-20
Vertiz, O. R.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423497, 423639, C01F 514
Patent
active
041454049
ABSTRACT:
A novel magnesium hydroxide of the formula Mg(OH).sub.2 having (i) a strain in the <101> direction of not more than 3.0 .times. 10.sup.-3, (ii) a crystallite size in the <101> direction of more than 800 A, and (iii) a specific surface area of less than 20 m.sup.2 /g. The magnesium hydroxide, if desired as coated with anionic surfactants, is useful, for example, as fire retardants for thermoplastic synthetic resins and aqueous paints. The novel magnesium hydroxide is prepared by heating in an aqueous medium at an elevated pressure a novel basic magnesium chloride or nitrate of this invention expressed by the formula Mg(OH).sub.2-x A.sub.x .sup.. mH.sub.2 O wherein A is Cl or NO.sub.3, x is a number of more than 0 but less than 0.2, and m is a number of 0 to 6.
REFERENCES:
patent: 1405388 (1922-02-01), Bassett
patent: 1757592 (1930-06-01), Schleicher
patent: 2804375 (1957-08-01), Kamlet
patent: 3081155 (1963-03-01), Dinan
patent: 3218130 (1965-11-01), Kawai et al.
patent: 3711600 (1973-01-01), Storm et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, Second Edition (Jun. 1969), vol. 12, pp. 724-731.
Kuroda Masataka
Miyata Shigeo
Okada Akira
Okazaki Tosihumi
Takasu Mitsuo
Kyowa Chemical Industry Co. Ltd.
Langel Wayne A.
Vertiz O. R.
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