Back to results
US 4,988,452 AGranted
Liquid automatic dishwashing detergent compositions containing bleach-stable nonionic surfactant
AssigneeThe Procter & Gamble Company
InventorsGeorge C. Kinstedt, Sherri L. Myers
Life of this patent
Estimating the term…
Abstract
Thickened aqueous automatic dishwashing detergent compositions comprising certain bleach-stable capped polyalkylene oxide block copolymer nonionic surfactants.
Claims21
A liquid automatic dishwashing detergent composition comprising:
- (a) hypochlorite bleach to yield available chlorine in an amount of from about 0.1% to about 5%;
- and
- (b) from about 0.1% to about 5% of a nonionic surfactant having the following structure:
- ##STR9## wherein I is the residue of a compound selected from the group consisting of a monohydroxyl compound, a dihydroxyl compound, and a polyhydroxyl compound;
- AO.sub.1 and AO.sub.2 are oxyalkyl groups and one of AO.sub.1 and AO.sub.2 is propylene oxide with the corresponding x or y being greater than zero, and responding x or y being greater than zero, and the molar ratio of propylene oxide to ethylene oxide is from about 2:1 to about 8:1 ;
- R and R are selected from the group consisting of alkyl aryl, aryl alkyl, alkyl, aryl, cycloalkyl, and mixtures thereof;
- w is less than 8 and x' and y' are greater than or equal to zero.
4 more elements
A liquid automatic dishwashing detergent composition comprising:
- (a) from about 15% to about 25% of sodium tripolyphosphate;
- (b) from about 4% to about 10% of sodium silicate;
- (c) from about 3% to about 10% of sodium carbonate;
- (d) hypochlorite bleach in an amount to provide from about 0.5% to about 1.5% of available chlorine;
- (e) from about 0.2% to about 2% of a polycarboxylate polymer thickening agent selected from the group consisting of polycarboxylate polymers comprising non-linear, water-dispersible, polyacrylic acid cross-linked with a polyalkenyl polyether having a molecular weight of from about 750,000 to about 4,000,000, and mixtures thereof;
- (f) from about 0.5% to about 2% of a nonionic surfactant of the following structure:
- ##STR11## having a molecular weight of about 1900, wherein PO is propylene oxide, EO is ethylene oxide, and the molar ratio of PO to EO is from about 4:1 to about 5:1.
4 more elements
Dependencies are inferred from the claim text.