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US 6,617,302 B2Granted
Polycarboxylic acid containing three-in-one dishwashing composition
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsNaresh Dhirajlal Ghatlia, Yu-Min Catherine Chiou
Life of this patent
Estimating the term…
Abstract
A dishwashing composition with hydrophobically modified polycarboxylic acids and water soluble entities that reduce phosphate scale formation is described. The dishwashing composition displays excellent cleaning benefits and glass appearance, even in the absence of NaCI additives and conventional rinse aid compositions.
Claims2
A dishwashing composition effective for cleaning glassware in hard water, the dishwashing composition comprising:
- (a) a hydrophobically modified polycarboxylic acid;
- and
- (b) a water soluble polymer that reduces phosphate scale formation;
- wherein said polycarboxylic acid (a) comprises at least one structural unit selected from the group consisting of:
- wherein each R1 and R2 are independently a hydroxy, alkoxy, carboxylic acid group, carboxylic acid salt, ester group, amide group, or a polyoxyalalkylene of an aliphatic group;
- wherein t is an integer from about 0 to about 2,000, a is an integer from about 0 to about 2,000, t≧1, a≧1, a is an integer that is from about 80% to 100% of t, n=0, z=1, at least two R1 groups are carboxylic acid groups or salts thereof, and at least one R2 group is C4-C20 alkyl or C8-C30 ethoxylated condensate of an aliphatic group;
- and
- wherein said water soluble polymer (b) has a polymer backbone has a polymer backbone comprising at least one structural unit derived from a monomer having the formula:
- wherein R1 is a group comprising at least one sp2 bond, Z is O, A is a mono- or a polycyclic aromatic group or an aliphatic group and each t is independently 0or 1and B+ is a monovalent cation.
6 more elements
A dishwashing composition effective for cleaning glassware in hard water, the dishwashing composition comprising:
- (c) a hydrophobically modified polycarboxylic acid;
- and
- (d) a water soluble polymer that reduces phosphate scale formation;
- wherein said polycarboxylic acid (a) comprises at least one structural unit selected from the group consisting of:
- wherein each R1 and R2 are independently a hydrogen, hydroxy, alkoxy, carboxylic acid group, carboxylic acid salt, ester group, amide group, aryl, C1-20 alkyl, C2-20 alkenyl, C2-20 alkynyl or a polyoxyalkylene condensate of an aliphatic group;
- wherein t is an integer from about 0 to about 2,000, a is an integer from about 0 to about 2,000, t≧1, a≧1, a is an integer that is from about 80% to 100% of t, n=0, z=1, at least two R1 groups are carboxylic acid groups or salts thereof, and at least one R2 group is C4-C20 alkyl or C8-C30 ethoxylated condensate of an aliphatic group;
- and
- wherein said water soluble polymer (b) has a polymer backbone has a polymer backbone comprising at least one structural unit derived from a monomer having the formula:
- wherein R1 is a group comprising at least one sp2 bond, Z is N, P, S, or an amido or ester link, A is a mono- or a polycyclic aromatic group or an aliphatic group and each t is independently 0 or 1 and B+ is a monovalent cation.
6 more elements
Dependencies are inferred from the claim text.