Patent ID: 8714724

Claim:
A copper phthalocyanine synergist having a carboxylic acid group thereon of the formula: wherein each of A, B, C, and D, A′, B′, C′, and D′, A″, B″, C″, and D″, A′″, B′″, C′″, and D′″ are optionally present, provided that at least one of A, B, C, D, A′, B′, C′, D′, A″, B″, C″, D″, A′″, B′″, C′″, and D′″ is —COOH or R—COOH, and wherein each of A, B, C, and D, A′, B′, C′, and D′, A″, B″, C″, and D″, A′″, B′″, C′″, and D′″ are independently selected from the group consisting of hydrogen, —COOH and R—COOH wherein R is (i) an alkyl group, which can be linear or branched, saturated or unsaturated, cyclic or acyclic, substituted or unsubstituted alkyl, and wherein hetero atoms may optionally be present in the alky group, (ii) an aryl group, which can be substituted or unsubstituted aryl, and wherein hetero atoms may optionally be present in the aryl group, (iii) an arylalkyl group, which can be substituted or unsubstituted arylalkyl, wherein the alkyl portion of the arylalkyl can be linear or branched, saturated or unsaturated, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms may optionally be present in either the aryl portion or the alkyl portion of the arylalkyl, (iv) an alkylaryl group, which can be substituted or unsubstituted alkylaryl, wherein the alkyl portion of the alkylaryl can be linear or branched, saturated or unsaturated, cyclic or acyclic, and substituted or unsubstituted, and wherein hetero atoms may optionally be present in either the alkyl portion or the aryl portion of the alkylaryl group.