High alkaline warewash detergent with enhanced scale control and soil dispersion
Detergent compositions and methods of preparing and using the detergent compositions are disclosed. The detergent compositions comprise a polymer system comprising at least one polycarboxylic acid polymer, copolymer, or terpolymer, an alkalinity source comprising an alkali metal carbonate, a nonionic surfactant and water. The detergent compositions are suitable at alkaline pH and reduce or prevent scale formation, improve soil dispersion, and provide effective detergency.
1. A concentrated detergent comprising:
from about 0.01 wt. % and about 20 wt. % of a polymer system comprising
(a) a polymaleic acid homopolymer in an amount of about 25 wt. % to about 55 wt. % of the polymer system;
(b) an acrylic acid copolymer in an amount of about 25 wt. % to about 55 wt. % of the polymer system;
(c) a maleic anhydride/olefin copolymer in an amount of about 5 wt. % to about 35 wt. % of the polymer system;
an alkalinity source comprising an alkali metal carbonate;
a nonionic surfactant; and
water;
wherein said detergent has an alkaline pH.
2. The detergent of claim 1 , wherein said polymaleic acid homopolymer is between about 30 wt. % and about 50 wt. % of the polymer system.
3. The detergent of claim 1 , wherein said acrylic acid copolymer is between about 30 wt. % and about 50 wt. % of the polymer system.
4. The detergent of claim 3 , wherein said polymaleic acid homopolymer, acrylic acid copolymer, and maleic anhydride/olefin copolymer are present in a ratio between about 1:1:1 to about 3:3:1.
5. The detergent of claim 1 , wherein maleic anhydride/olefin copolymer is present between about 7 wt. % and about 30 wt. % of the polymer system.
6. The detergent of claim 1 , wherein said detergent composition comprises between about 0 wt. % and about 20 wt. % polymer system, between about 50 wt. % and about 99 wt. % alkalinity source, between about 0 wt. % and about 15 wt. % nonionic surfactant, and between about 0 wt. % and about 20 wt. % water.
7. The detergent of claim 1 , wherein said detergent is substantially free of phosphorus.
8. A concentrated warewash detergent comprising:
between about 0 wt. % and about 15 wt. % of a polymer system comprising:
(a) at least one polymaleic acid homopolymer in an amount of about 25 wt. % to about 55 wt. % of the polymer system,
(b) at least one polyacrylic acid copolymer in an amount of about 25 wt. % to about 55 wt. % of the polymer system, and
(c) at least one maleic anhydride/olefin copolymer in an amount of about 5 wt. % to about 35 wt. % of the polymer system;
between about 50 wt. % and about 99 wt. % of an alkali metal carbonate;
between about 0 wt. % and about 15 wt. % of a nonionic surfactant; and
water;
wherein said detergent has a pH between about 7 and about 14 and wherein the at least one polymaleic acid homopolymer, at least one polyacrylic acid copolymer, and at least one maleic anhydride/olefin copolymer are in a ratio of between about 1:1:1 and about 3:3:1.
9. The warewash detergent of claim 8 , wherein said polymer system comprises between about 30 wt. % to about 50 wt. % polymaleic acid homopolymer, between about 30 wt. % to about 50 wt. % polyacrylic acid copolymer, and between about 7 wt. % to about 30 wt. % maleic anhydride/olefin copolymer.
10. The warewash detergent of claim 8 , wherein the detergent contains less than 0.5 wt. % phosphorus.
11. The warewash detergent of claim 8 , wherein the polymers, copolymers, and/or terpolymers of the polymer system have molecular weights between about 100 and about 10,000.
12. The warewash detergent of claim 8 , wherein said detergent contains at least one additional functional ingredient selected from the group consisting of defoaming agents, anti-redeposition agents, bleaching agents, enzymes, surfactants, solubility modifiers, dispersants, rinse aids, metal protecting agents, stabilizing agents, corrosion inhibitors, additional sequestrants and/or chelating agents, fragrances and/or dyes, rheology modifiers or thickeners, hydrotropes or couplers, buffers, solvents, and combinations thereof.
13. A method of using a warewash detergent of claim 8 comprising:
forming a use solution with said warewash detergent;
contacting a surface with said use solution;
cleaning said surface with said use solution.
14. The method of claim 13 , wherein said warewash detergent is substantially free of phosphorus.
15. The method of claim 13 , wherein said warewash detergent is present in the use solution between about 200 ppm and about 10,000 ppm.
16. The method of claim 13 , wherein said warewash detergent is present in the use solution between about 500 ppm and about 4000 ppm.
17. The method of claim 13 , wherein said polymer system is present in the use solution between about 1 and about 500 ppm.
18. The method of claim 13 , wherein said surface is a ware.
19. The method of claim 14 , wherein said method provides substantially similar cleaning performance to a method employing a phosphorus-containing detergent.