Toner for developing electrostatic images
AssigneeOrient Chemical Industries, Ltd.
InventorsShuji Sugawara, Kazuaki Sukata, Shun-ichiro Yamanaka
Life of this patent
Estimating the term…
Loading patent…
AssigneeOrient Chemical Industries, Ltd.
InventorsShuji Sugawara, Kazuaki Sukata, Shun-ichiro Yamanaka
Estimating the term…
A toner for developing electrostatic images contains at least one complex salt compound obtained by treating with an alkali metal salt, alkaline earth metal salt, alkali metal hydroxide, alkaline earth metal hydroxide, ammonium salt or pyridinium salt, an ether linkage group containing compound of the formula A.sup.1 --X--[(--L--X--).sub.m --(--Ar--X--).sub.n ]--A.sup.2[I] wherein (--L--X--) represents an oxyalkylene group or a thioarylene group, (--Ar--X--) represents an oxyarylene group or a thioarylene group, [(--L--X--).sub.m --(--Ar--X--).sub.n ] represents a combination of m units of (--L--X--) and n units of (--Ar--X--) bound in a given order, m and n independently represent an integer of 0 or more, and when n is 0, m is 3 or more, and when m is 0, n is 1 or more, X represents --O-- or --S--, L represents an alkylene group having 1 to 4 carbon atoms which is branched or not branched or a cycloalkylene group, Ar represents a monocyclic or polycyclic arylene group which does or does not have a substituent or a --(CH.sub.2).sub.a --Ax--(CH.sub.2).sub.a -- group in which a represents an integer from 1 to 4 and Ax represents a monocyclic or polycyclic arylene group which does or does not have a substituent, and A.sup.1 and A.sup.2 independently represent hydrogen, an alkyl group, a cycloalkyl group, a monocyclic or polycyclic aryl group which has or does not have a substituent, an aralkyl group or a residue of a nitrogen-containing heterocyclic compound having an --OH group or an --SH group.
A positively chargeable toner for developing electrostatic images which contains at least one complex salt compound, as a charge control agent, obtained by treating a compound represented by the following formula I with an alkali metal salt, alkaline earth metal salt, alkali metal hydroxide, alkaline earth metal hydroxide, ammonium salt or pyridinium salt:
Positively chargeable toner for developing an electrostatic image, comprising a toner resin and a charge control effective amount of a positive charging charge control agent comprising a complex salt compound obtained by treating with an alkali metal salt, alkaline earth metal salt, alkali metal hydroxide, alkaline earth metal hydroxide, ammonium salt or pyridinium salt, a compound of the formula
Dependencies are inferred from the claim text.