Aqueous dispersion of poly(acetal-polyether) and its use in protective coatings
View Patent ↗An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols, ethoxylated acetyleneic diols, phosphate esters, dialkyl sulfosuccinates, and mixtures thereof. This aqueous dispersion improves the incorporation of the HM-PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.
1. An aqueous polymer dispersion comprising
a) hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE),
b) water, and
c) a viscosity reducing agent selected from the group consisting of
i) an ethoxylated alcohol having a C 9-12 hydrocarbon moiety component,
ii) an ethoxylated acetylenic diol,
iii) a phosphate ester,
iv) a combination of an ethoxylated alcohol and an anionic dialkyl sulfosuccinate, and
v) a combination of ethoxytated alcohol and an anionic phosphate ester.
2. The aqueous dispersion of claim 1 wherein the HM-PAPE has a weight average molecular weight (Mw) upper limit of 100,000.
3. The aqueous dispersion of claim 1 , wherein the HM-PAPE has a weight average molecular weight (Mw) upper limit of 50,000.
4. The aqueous dispersion of claim 1 , wherein the HM-PAPE has a weight average molecular weight (Mw) upper limit of 40,000.
5. The aqueous dispersion of claim 1 , wherein the HM-PAPE has a weight average molecular weight (Mw) lower limit of 3,000.
6. The aqueous dispersion of claim 1 , wherein the HM-PAPE has a weight average molecular weight (Mw) lower limit of 4,000.
7. The aqueous dispersion of claim 1 , wherein the HM-PAPE has a weight average molecular weight (Mw) lower limit of 8,000.
8. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically end-capped poly(acetal- or ketal-polyether).
9. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically end-capped poly(acetal- or ketal-polyether) that has end-caps as well as pendant hydrophobes therein.
10. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically modified poly(acetal- or ketal-polyether) that has C 3 -C 30 alkyl hydrophobes therein.
11. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically end-capped poly(acetal- or ketal-polyether) that has C 12 C 18 alkyl hydrophobes therein.
12. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically end-capped poly(acetal- or ketal-polyether) that has alkylaryl hydrophobes therein.
13. The aqueous dispersion of claim 1 , wherein the HM-PAPE is a hydrophobically end-capped poly(acetal- or ketal-polyother) that has methylphenyl hydrophobes in bunches therein.
14. The aqueous dispersion of claim 1 , wherein the HM-PAPE is present in an upper limit amount 40 wt %.
15. The aqueous dispersion of claim 1 , wherein the HM-PAPE is present in an upper limit amount of 30 wt %.
16. The aqueous dispersion of claim 1 , wherein the HM-PAPE is present in an upper limit amount of 20 wt %.
17. The aqueous dispersion of claim 1 , wherein the HM-PAPE is present in a lower limit amount of 10 wt %.
18. The aqueous dispersion of claim 1 , wherein the HM-PAPE is present in a lower limit amount Of 15 wt %.
19. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is present in an upper limit amount of 30 wt %.
20. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is present in an upper limit amount of 20 wt %.
21. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is present in an upper limit amount of 10 wt %.
22. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is present in a lower limit amount of 0.5 wt %.
23. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is present in a lower limit amount of 1.0 wt %.
24. The aqueous dispersion of claim 1 wherein the viscosity reducing agent is present in a lower limit amount of wt 3.0 wt%.
25. The aqueous dispersion of claim 1 , wherein the water is present in an upper limit amount of 85 wt %.
26. The aqueous dispersion of claim 1 , wherein the water is present in an upper limit amount of 75 wt %.
27. The aqueous dispersion of claim 1 , wherein the water is present in an upper limit amount of 65 wt %.
28. The aqueous dispersion of claim 1 , wherein the water is present in a lower limit amount of 30 wt %.
29. The aqueous dispersion of claim 1 , wherein the water is present in a lower limit amount of 40 wt %.
30. The aqueous dispersion of claim 1 , wherein the water is present in a lower limit amount of 50 wt %.
31. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is ethoxylated 2,4,7,9-tetramethyl-5-decyn-4,7-diol (Surfynol®465 product).
32. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is a phosphate ester (Strodex®LFK-70 product).
33. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is alcohol ethoxylates (C 10 -(EO) 6 (Iconol®DA-6 product).
34. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is a combination of an ethoxylated alcohol and an anionic dialkyl sulfosuccinate and wherein the ethoxyleted alcohol is a tetraethylene glycol monobutyl ether.
35. The aqueous dispersion of claim 1 , wherein the viscosity reducing agent is C 9-11 -(EO) 6 (Rhodasurf® 91-6).
36. The aqueous dispersion of claim 1 , wherein butyltriglycol is also Present.
37. An aqueous protective coating composition comprising the dispersion of claim 1 .
38. The aqueous protective coating composition of claim 37 , further comprising a latex.
39. The aqueous protective coating composition of claim 38 , wherein the latex is selected from the group of 100% acrylics, vinyl-acrylics, and styrene-acrylics.
40. The aqueous protective coating composition of claim 38 , wherein the aqueous protective coating further comprises a pigment.
41. The aqueous protective coating composition of claim 40 , wherein the pigment is selected from the group consisting of hydrated aluminum oxide, barium sulfate, calcium silicate, clay, silica, talc, titanium dioxide, zinc oxide, and mixtures thereof.
42. The aqueous protective coating composition of claim 40 , wherein the aqueous protective coating has a pigment volume concentration (PVC) upper limit of 85%.
43. The aqueous protective coating composition of claim 40 , wherein the aqueous protective coating has a pigment volume concentration (PVC) upper limit of 75%.
44. The aqueous protective coating composition of claim 40 , wherein the aqueous protective coating has a pigment volume concentration (PVC) upper limit of 65%.
45. The aqueous protective coating composition of claim 40 , wherein the aqueous protective coating has a pigment volume concentration (PVC) lower limit of 10%
46. The aqueous protective coating of claim 40 , wherein the aqueous protective coating has a pigment volume concentration (PVC) lower limit of 20%.
47. An improved method of incorporating HM-PAPE polymer into a protective coating formulation comprising adding the aqueous dispersion of claim 1 to the coating formulation while concurrently stirring the formulation, wherein the polymer dissolution time is significantly reduced as compared to the addition of HM-PAPE alone in water.
48. The improved method of claim 47 , wherein the polymer dissolution time is reduced by 30%.
49. The improved method of claim 47 , wherein the polymer dissolution time is reduced by 50%.