Electroconductive powder and process for production thereof
AssigneeMitsubishi Kinzoku Kabushiki Kaisha
InventorMotohiko Yoshizumi
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Abstract
By pouring a solution containing hydrolyzable tin and antimony salts into an aqueous dispersion of titanium oxide particles and mixing, the salts are caused to hydrolyze, whereby a uniform and strongly adherent coating layer of antimony-containing tin oxide is formed on the surface of each particle of the titanium oxide. The coated powder thus obtained is non-hygroscopic and non-toxic and exhibits stable electroconductivity. Furthermore, since it can possess excellent whiteness, it is suitable for forming the electroconductive layers of electro-thermosensitive papers and electrostatic recording papers, for use as the antistatic agent of resins, and for other uses.
Claims6
A process for producing electroconductive powder which comprises the steps of:
- providing an aqueous dispersion of titanium oxide particles;
- providing a solution containing a hydrolyzable tin salt and a hydrolyzable antimony salt, said solution remaining free of hydrolyzed tin salt and hydrolyzed antimony salt;
- adding said solution to said dispersion under agitation while said dispersion is maintained at a temperature of 60.degree. to 100.degree. C., to hydrolyze said tin salt and said antimony salt as a result of contact between said solution and said dispersion, thereby to produce titanium oxide particles coated with antimony-containing tin oxide;
- and
- recovering the coated titanium oxide particles.
Dependencies are inferred from the claim text.