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1. (WO2017035006) PYRITHIONE PRESERVATIVE SYSTEM IN SOLID RINSE AID PRODUCTS
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What is claimed is:

1. A solid rinse aid composition comprising:

a pyrithione preservative;

a hardening agent;

one or more nonionic surfactants; and

additional functional ingredients,

wherein the composition is a concentrate formed into a solid and the solid concentrate is useful in preparing a stable, aqueous use solution having a neutral to acidic pH.

2. The rinse aid composition of claim 1, further comprising one or more short chain alkyl benzene and/or alkyl naphthalene sulfonates.

3. The rinse aid composition of claim 2, wherein the one or more short chain alkyl benzene and/or alkyl naphthalene sulfonates is selected from the group comprising: sodium xylene sulfonate, sodium toluene sulfonate, sodium cumene sulfonate, potassium toluene sulfonate, ammonium xylene sulfonate, calcium xylene sulfonate, sodium alkyl naphthalene sulfonate, and sodium butylnaphthalene sulfonate.

4. The rinse aid composition of claim 3, wherein the short chain alkyl benzene and/or alkyl naphthalene sulfonate is sodium xylene sulfonate or sodium cumene sulfonate.

5. The solid rinse aid composition of claims 2-4, wherein the short chain alkyl benzene and/or alkyl naphthalene sulfonate is present in an amount of from about 50 wt-% to about 80 wt-%.

6. The rinse aid composition of any of claims 1-5, wherein the hardening agent comprises a solid acid, urea, sodium xylene sulfonate, sodium acetate, sodium sulfate, sodium carbonate, sodium tripoly phosphate, polyethylene glycol, or a combination thereof.

7. The rinse aid composition of claim 6, wherein the solid acid is citric acid or a monovalent citrate salt.

8. The rinse aid composition of any of claims 1-7, wherein the hardening agent is present in an amount of from about 5 wt-% to about 75 wt-%.

9. The rinse aid composition of any of claims 1-8, wherein the solid is made from casting or extruding.

10. The rinse aid composition of any of claims 1-8, wherein the solid is a tablet, a pressed solid, a cast solid, or an extruded solid.

11. The rinse aid composition of any of claims 1-10, wherein the solid concentrate is substantially nonaqueous.

12. The rinse aid composition of any of claims 1-11, wherein said nonionic surfactant is a low foaming surfactant.

13. The rinse aid composition of claim 12, wherein the low foaming surfactant is present in an amount of from about 5 wt-% to about 50 wt-%.

14. The rinse aid composition of any of claims 1-13, wherein the nonionic surfactant is an alcohol alkoxylate.

15. The rinse aid composition of any of claims 1-14, wherein the nonionic surfactant is an alcohol ethoxylate having the formula R-0-(CH2CH20)n-H wherein R is a (C1-C12) alkyl group and n is an integer in the range of 1 to 100.

16. The rinse aid composition of any of claims 1-14, wherein the nonionic surfactant comprises a combination of nonionic surfactants having the formula of R-O-(CH2CH20)n-H wherein R is a (CI -CI 2) alkyl group and n is an integer in the range of 1 to 100.

17. The rinse aid composition of any of claims 1-16, wherein the nonionic surfactant is comprised of at least one long chain alkoxylated alcohol.

18. The rinse aid composition of any of claims 1-17, wherein the nonionic surfactant is an alkyl-ethylene oxide-propylene oxide copolymer surfactant.

19. The rinse aid composition of claim 18, wherein the alkyl-ethylene oxide-propylene oxide copolymer surfactant has a single hydroxyl functional group per molecule according to the following structure Alkyl-(EO)m-(PO)n-POH, wherein m is an integer in the range from 1 to 20 and n is an integer in the range from 1 to 20.

20. The rinse aid composition of claims 16-19, wherein the ratio of the nonionic surfactants is from about 1.5: 1 to about 10: 1.

21. The rinse aid compositionof any of claims 1-20, wherein the pyrithione preservative comprises from about 0.05 wt-% to about 20 wt-% of the solid concentrate, wherein the hardening agent comprises from about 5 wt-% to about 40 wt-% of the solid concentrate, wherein the nonionic surfactants comprises from about 0.5 wt-% to about 75 wt-% of the solid concentrate; and wherein the additional functional ingredients comprises from about 0.1 wt-% to about 50 wt-% of the solid concentrate.

22. The rinse aid composition of any of claims 1-21, wherein the additional functional ingredients are selected from the group consisting of defoaming agents, additional surfactants, anti-redeposition agents, bleaching agents, solubility modifiers, dispersants, additional rinse aids, an anti-microbial agent, antiredeposition agents, metal protecting agents and/or etch protection, stabilizing agents, corrosion inhibitors, sequestrants and/or chelating agents, threshold inhibitors, enzymes, humectants, pH modifiers, fragrances and/or dyes, rheology modifiers or thickeners, hydrotropes or couplers, buffers, solvents and combinations thereof.

23. The rinse aid composition of claim 22, wherein the additional functional ingredient is a polycarboxylate and comprises from about 0.1 wt-% to about 30 wt-% of the solid concentrate composition.

24. The rinse aid composition of claim 23, wherein the polycarboxylate is a

polyacrylic

acid.

25. A method of making a solid rinse aid composition comprising;

admixing the components of the composition of any of claims 1-24;

allowing said mixture to set; and thereafter

mixing in any liquid components of said rinse aid;

forming a solid concentrate with the rinse aid mixture, wherein the solid concentrate is useful in preparing a stable, aqueous use solution having an acidic pH.

26. The method of claim 25, wherein said forming a solid is by pressing.

27. The method of claim 25, wherein said forming a solid is by extrusion.

28. The method of claim 25, wherein said forming a solid is by casting.

29. A method of rinsing comprising:

providing a solid rinse aid composition according to any of claims 1-24;

contacting the rinse aid composition with water to form a sump solution providing antimicrobial efficacy in the sump solution prior to generating a use solution; and generating the use solution and applying the use solution to a surface.

30. The method of claim 29, wherein the sump solution has a pH from about 0-7.

31. The method of claim 29, wherein the sump solution has a pH from about 1-6.

32. The method of claim 29, wherein the sump solution has a pH from about 2.5-5.5.

33. The method of any of claims 29-32, wherein said use solution comprises 2,000 ppm

or less active materials.

34. The method of any of claims 29-32, wherein said use solution comprises 1,000 ppm

or less active materials.

35. The method of any of claims 29-34, wherein said use solution upon further dilution of the sump solution has pH from about 1 to about 9.

36. The method of any of claims 29-34, wherein said use solution upon further dilution of the sump solution has pH from about 1 to about 8.

37. The method of any of claims 29-34, wherein said use solution upon further dilution of the sump solution has pH from about 1 to about 7.

38. The method of any of claims 29-37, wherein said contacting is by directing water on to a solid block of rinse aid.

39. The method of any of claims 29-38, wherein said solid rinse aid is dissolved into a use solution by said contacting.

40. The method of any of claims 29-39, wherein said surface is a hard surface.

41. The method of claim 40, wherein said hard surface comprises metal, glass, plastic, ceramic or tile.

42. The method of any of claims 29-41, wherein the concentrate composition is diluted from about 0.01% weight/volume to about 0.2% weight/volume with a diluent.

43. The method of any of claims 29-41, wherein the sump solution is from 1% to 20% of the solid rinse aid composition.

44. The method of claims 42 or 43, wherein the diluent is water.

45. The method of any of claims 29-44, wherein the pyrithione preservative is in the sump solution from about 100 ppm to 500 ppm.

46. The method of any of claims 30-47, wherein the pyrithione preservative is in the sump solution from about 150 ppm to 300 ppm.

47. The method of any of claims 29-46, wherein the surface is spot-free and film-free upon contacting with the concentrated composition.

48. The method of any of claims 29-47, wherein the sump solution retains preservative efficacy for at least 4 weeks.

49. The method of any of claims 29-48, wherein the sump solution retains preservative efficacy for at least 8 weeks.

50. The method of any of claims 29-49, wherein the sump solution retains preservative efficacy for at least 3 months.

51. The method of any of claims 29-50, wherein the solid rinse aid composition has a shelf- stabiltiy of at least one year at room temperature.