Fine particle composite metal hydroxide, calcined product thereof, method for producing the same, and resin composition therefor

摘要

PROBLEM TO BE SOLVED: To solve the weak acid resistance and the aggregation of primary particles, which is caused when the average width of primary particles of magnesium hydroxide is reduced. The present invention provides a composite metal hydroxide represented by the following formula (1) satisfying the following (A) and (B). (Mg) 1-X (M 2 +) X (OH) 2 (1) (wherein M 2 + is at least one divalent metal selected from Cr, Mn, Fe, Co, Ni, Cu, Zn, X The range of 0 X 0.5.) (A) The average width of primary particles by SEM method is 10 nm or more and less than 200 nm; (B) the monodispersity represented by the following formula is 50% or more; Degree (%) = (average width of primary particles by SEM method / average width of secondary particles by dynamic light scattering method) × 100 [Diagram]