초록 ▼

Provided are acidified aqueous stable dispersions of an exfoliated silicate derived from a silicate having a layer lattice structure in which the silicate layer units have a thickness of 5 to 25 Angstroms, wherein the exchange capacity ranges from 30 to 200 millequivalents per gram of silicate havin

Provided are acidified aqueous stable dispersions of an exfoliated silicate derived from a silicate having a layer lattice structure in which the silicate layer units have a thickness of 5 to 25 Angstroms, wherein the exchange capacity ranges from 30 to 200 millequivalents per gram of silicate having a layer lattice structure, and wherein the silicate materials have been exfoliated with a cationic group-containing polymer or polymer having functional groups which can be post-reacted to form cationic groups. These silicate dispersions are useful in coating compositions, particularly in electrodepositable coating compositions, where they impart improved crater control.

대표청구항 ▼

[ We claim:] [1.] An acidified aqueous stable dispersion comprising an exfoliated silicate derived from a silicate having a layer lattice structure in which the silicate layer units have a thickness of 5 to 25 .ANG. and are separated by exchangeable cations, wherein the cationic exchange capacity is

[ We claim:] [1.] An acidified aqueous stable dispersion comprising an exfoliated silicate derived from a silicate having a layer lattice structure in which the silicate layer units have a thickness of 5 to 25 .ANG. and are separated by exchangeable cations, wherein the cationic exchange capacity is 30 to 200 millequivalents per 100 gram of the silicate having a layer lattice structure, and wherein said layer silicate material has been exfoliated in an acidified aqueous medium with a cationic group-containing polymer or a polymer having functional groups which can be post-reacted to form cationic groups.