Colloidal antimony oxide powder low in volatility at high temperature and preparing method thereof

Abstract

The invention relates to colloidal antimony oxide powder low in volatility at high temperature and a preparing method thereof. The colloidal antimony oxide powder is made by 1, performing reduction, to be specific, adjusting pH value of antimony pentoxide hydrosol to 7.0 to 8.0 via alkali metal hydroxide, and adding reducing agent to allow partial reduction to obtain antimony oxide sol; 2, removing alkali metal ions, to be specific, removing the alkali metal ions in the antimony oxide sol by ion exchange; 3, performing drying, to be specific, drying the antimony oxide sol with the alkali metal ions removed, to obtain the colloidal antimony oxide powder low in volatility at high temperature. The colloidal antimony oxide powder has lower crystal water content than common colloidal antimony pentoxide powder, the high-temperature burning loss rate of the colloidal antimony pentoxide powder made by the conventional methods is decreased from 16% to 6% below, and high-temperature heating performance is excellent; when heated to 400 DEG C, the colloidal antimony oxide powder never carbonizes or blackens and has stable white appearance; the preparation process is easy to control and has no three wastes.

Description

technical field

[0001] The invention relates to an antimony oxide dry powder and a preparation method thereof, in particular to a colloidal antimony oxide dry powder with low volatility at high temperature and a preparation method thereof. Background technique

[0002] Antimony trioxide and antimony pentoxide are widely used as flame retardant additives for flammable materials such as plastics, chemical fibers, rubber, cotton and linen fabrics, paints and copper clad boards. Colloidal antimony pentoxide or colloidal antimony trioxide has extremely fine particle size, large surface area, high activity, high permeability, high adhesion, and does not affect the coloring degree. Therefore, it is a kind of flame retardant with excellent performance. additive. Due to its coarse particle size, antimony trioxide cannot be compared with colloidal antimony pentoxide or colloidal antimony trioxide dry powder as a flame retardant additive. The preparation method of colloidal antimony ...