Patent ID: 6110341
Filing Date: 2000-08-29
Classification: C09D,Y10S

Abstract:
In an electrodeposition bath composition, said electrodeposition bath composition comprising a resinous phase dispersed in an aqueous medium, said resinous phase comprising the following components:(a) an ungelled active hydrogen group-containing cationic electrodepositable resin;(b) a curing agent having functional groups reactive with the active hydrogen groups of (a); the improvement comprising an electrodeposition bath containing at least one organic phosphorus-based compound of the formula ##STR3## where R is a monovalent hydrocarbon group or R' 0 ; R.sup.1 and R.sup.2 can be the same or different and are independently H or a monovalent hydrocarbon group, and R' is H or a monovalent hydrocarbon group, provided that at least one of R', R.sup.1 and R.sup.2 is a monovalent hydrocarbon group; or ##STR4## where n is 0 to 100; R.sup.3, R.sup.4, R.sup.5 and R.sup.5' can be the same or different and are independently H, a monovalent hydrocarbon group, a residue of a monoepoxide or a residue of a polyepoxide; L is a divalent linking group derived from a polyepoxide; and R.sup.6 and R.sup.6' can be the same or different and are monovalent hydrocarbon groups.