Dual Character Biopolymer Useful in Cleaning Products

A cleaning composition comprising a dispersant polymer comprising a randomly substituted polysaccharide backbone comprising unsubstituted and substituted glucopyranose residues and having a general structure according to Formula I:

• wherein each substituted glucopyranose residue independently comprises from 1 to 3 R substituents, which may be the same or different on each substituted glucopyranose residue, and
• wherein each R substituent is independently a substituent selected from hydroxyl, hydroxymethyl, R1, R2, and a polysaccharide branch having a general structure according to Formula I, provided that at least one R substituent comprises at least one R1 or R2 group,
• wherein each R1 is independently, the same or different, a first substituent group having a degree of substitution ranging from 0.01 to 0.4 and a structure according to Formula II:
• wherein each R3 is selected from the group consisting of a lone pair of electrons;
• H;
• CH3;
• linear or branched, saturated or unsaturated C2-C18 alkyl, provided that at least two of the R3 groups are not a lone pair of electrons, R4 is a linear or branched, saturated or unsaturated C2-C18 alkyl chain or a linear or branched, saturated or unsaturated secondary hydroxy(C2-C18)alkyl chain, L is a linking group selected from the group consisting of —O—, —C(O)O—, —NR6—, —C(O)NR6—, and —NR6C(O)NR6—, and R6 is H or C1-C6 alkyl, w has a value of 0 or 1, y has a value of 0 or 1, and z has a value of 0 or 1, and
• each R2 is independently, the same or different, a second substituent group having a degree of substitution ranging from 0.1 to 3.0 and a structure according to Formula III:
• wherein R5 is an anionic substituent selected from the group consisting of carboxylate, carboxymethyl, succinate, sulfate, sulfonate, arylsulfonate, phosphate, phosphonate, dicarboxylate, and polycarboxylate, a has a value of 0 or 1, b is an integer from 0 to 18, and c has a value of 0 or 1, wherein the ratio of the degree of substitution of the first substituent to degree of substitution of the second substituent ranges from 0.05:1 to 0.4:1, and
• wherein the dispersant polymer has a weight average molecular weight ranging from 1,000 Daltons to 1,000,000 Daltons.

A method for making a cleaning composition comprising:

• adding a dispersant polymer to the cleaning composition,
• wherein the dispersant polymer comprises a randomly substituted polysaccharide backbone comprising unsubstituted and substituted glucopyranose residues and having a general structure according to Formula I:
• wherein each substituted glucopyranose residue independently comprises from 1 to 3 R substituents, which may be the same or different on each substituted glucopyranose residue, and
• wherein each R substituent is independently a substituent selected from hydroxyl, hydroxymethyl, R1, R2, and a polysaccharide branch having a general structure according to Formula I, provided that at least one R substituent comprises at least one R1 or R2 group,
• wherein each R1 is independently, the same or different, a first substituent group having a degree of substitution ranging from 0.01 to 0.4 and a structure according to Formula II:
• wherein each R3 is selected from the group consisting of a lone pair of electrons;
• H;
• CH3;
• linear or branched, saturated or unsaturated C2-C18 alkyl, provided that at least two of the R3 groups are not a lone pair of electrons, R4 is a linear or branched, saturated or unsaturated C2-C18 alkyl chain or a linear or branched, saturated or unsaturated secondary hydroxy(C2-C18)alkyl chain, L is a linking group selected from the group consisting of —O—, —C(O)O—, —NR6—, —C(O)NR6—, and —NR6C(O)NR6—, and R6 is H or C1-C6 alkyl, w has a value of 0 or 1, y has a value of 0 or 1, and z has a value of 0 or 1, and
• each R2 is independently, the same or different, a second substituent group having a degree of substitution ranging from 0.1 to 3.0 and a structure according to Formula III:
• wherein R5 is an anionic substituent selected from the group consisting of carboxylate, carboxymethyl, succinate, sulfate, sulfonate, arylsulfonate, phosphate, phosphonate, dicarboxylate, and polycarboxylate, a has a value of 0 or 1, b is an integer from 0 to 18, and c has a value of 0 or 1, wherein the ratio of the degree of substitution of the first substituent to degree of substitution of the second substituent ranges from 0.05:1 to 0.4:1, and
• wherein the dispersant polymer has a weight average molecular weight ranging from 1,000 Daltons to 1,000,000 Daltons.