Waterbased low noise generating coating

• US 20080090948A1
• Filed: 10/12/2006
• Published: 04/17/2008
• Est. Priority Date: 10/12/2006
• Status: Abandoned Application

• Current Assignee: Henkel AG & Co KGaA
• Original Assignee: Henkel AG & Co KGaA
• Inventors: DeWitt, Julie, Pinter, Michael W.
• Application Number:
  US11/546,890
• Publication Number:
  US 20080090948A1
• Time in Patent Office: Days
• US Class Current: 524/275
• CPC Class Codes: B60J 10/17 provided with a low-friction material on the surface
• CPC Class Codes: C08G 2350/00 Acoustic or vibration damping material
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 2666/54 Inorganic substances
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 91/06 Waxes
• CPC Class Codes: C09D 175/04 Polyurethanes

Abstract

A coating for weatherstrips, windshield wipers, door seals, trunk seals, sunroof seals, windshield seals, automotive trim and the like. The coating comprises a water-based formula that provides low noise and, optimally, also provides good weathering and abrasion resistance. The low noise property is achieved via a combination of waxes and/or aqueous colloidal silica, and a high molecular weight silicone resin. Flexibility and weathering resistance are achieved via the addition of a polyurethane/fluoropolymer resin binder blend and UV-stabilizers and absorbers. Also provided is a method of manufacturing such coatings that comprises the steps of pre-dispersing the wax particles in co-solvents and wetting agents and then combining the pre-dispersed wax particles with the silicone resin and other ingredients.

Claims

1. A low noise and weather resistant water-based coating comprising at least one wax, at least one silicone resin and at least one resin binder.

2. The coating of claim 1, further comprising at least one UV stabilizer, UV absorber or mixture thereof.

3. The coating of claim 1 wherein the at least one resin binder comprises a polyurethane resin, a blend of polyurethane resins or a blend of polyurethane resin and fluoropolymer.

4. The coating of claim 1 further comprising one or more of the group consisting of matting agents, curing agents, wetting agents, catalysts, carbon black, amines, rheology modifiers, chlorinated polyolefin, co-solvents, cross linking agents, aqueous colloidal silica and mixtures thereof.

5. The coating of claim 1, further comprising one or more of the group consisting of epoxy, epoxy silane, carbodiimide, melamine, oxazoline, polyisocyanate, isocyanate, blocked isocyanate, aziridine, melamine-formaldehyde, polyaziridine, urea formaldehyde or mixtures thereof.

6. The coating of claim 1, wherein the silicone resin has a molecular weight in the range from about 1,000 to about 800,000.

7. The coating of claim 6, wherein the silicone resin comprises a blend of silicone resins having different molecular weights.

8. The coating of claim 7, wherein the blend of silicone resins comprises a blend of three silicone resins having molecular weights in the ranges of about 1,000 to about 2,500;

about 5,000 to about 20,000; and

about 400,000 to about 800,000.

9. The coating of claim 8, wherein at least one of the silicone resins is polydimethoxysiloxane.

10. The coating of claim 3, wherein the coating comprises in the range of from about 0.1 wt % to about 30 wt % wax.

11. The coating of claim 10 wherein the coating comprises in the range of about 0.5 to about 5 wt % wax.

12. The coating of claim 3, wherein the coating comprises in the range of about 1 wt % to about 40 wt % silicone resin.

13. The coating of claim 14, wherein the coating comprises in the range of about 8 wt % to about 20 wt % silicone resin.

14. The coating of claim 3, wherein the coating comprises in the range of about 4 wt % to about 60 wt % resin binder.

15. The coating of claim 16, wherein the coating comprises in the range of about 15 wt % to about 45 wt % resin binder.

16. An article coated with the coating of claim 1.

18. A low noise and weather resistant water-based coating comprising at least one aqueous colloidal silica, at least one silicone resin and at least one resin binder.

17. The article of claim 19, wherein the article comprises a weatherstrip, windshield wiper or automotive seal.

19. The coating of claim 18, further comprising at least one UV stabilizer, UV absorber or mixture thereof.

20. The coating of claim 18 wherein the at least one resin binder comprises a polyurethane resin, a blend of polyurethane resins or a blend of polyurethane resin and fluoropolymer.

21. The coating of claim 18 further comprising one or more of the group consisting of matting agents, curing agents, wetting agents, catalysts, carbon black, amines, rheology modifiers, chlorinated polyol, co-solvents, cross linking agents, wax and mixtures thereof.

22. The coating of claim 18, further comprising one or more of the group consisting of epoxy, epoxy silane, carbodiimide, melamine, oxazoline, polyisocyanate, isocyanate, blocked isocyanate, aziridine, melamine-formaldehyde, polyaziridine, urea formaldehyde or mixtures thereof.

23. The coating of claim 18, wherein the silicone resin has a molecular weight in the range from about 1,000 to about 800,000.

24. The coating of claim 23, wherein the silicone resin comprises a blend of silicone resins having different molecular weights.

25. The coating of claim 24, wherein the blend of silicone resins comprises a blend of three silicone resins having molecular weights in the ranges of about 1,000 to about 2,500;

about 5,000 to about 20,000; and

about 400,000 to about 800,000.

26. The coating of claim 25, wherein at least one of the silicone resins is polydimethoxysiloxane.

27. The coating of claim 20, wherein the coating comprises in the range of from about 0.1 wt % to about 30 wt % aqueous colloidal silica.

28. The coating of claim 27 wherein the coating comprises in the range of about 0.5 to about 15 wt % aqueous colloidal silica.

29. The coating of claim 20, wherein the coating comprises in the range of about 1 wt % to about 40 wt % silicone resin.

30. The coating of claim 29, wherein the coating comprises in the range of about 8 wt % to about 20 wt % silicone resin.

31. The coating of claim 20, wherein the coating comprises in the range of about 4 wt % to about 60 wt % resin binder.

32. The coating of claim 31, wherein the coating comprises in the range of about 15 wt % to about 45 wt % resin binder.

33. An article coated with the coating of claim 18.

34. The article of claim 33, wherein the article comprises a weatherstrip, windshield wiper, automotive seal or trim component.

46. The method of claim 34, wherein the coating comprises in the range of about 0.5 to about 5 wt % wax.

47. The method of claim 34, wherein the coating comprises in the range of about 1 wt % to about 40 wt % silicone resin.

48. The method of claim 47, wherein the coating comprises in the range of about 8 wt % to about 20 wt % silicone resin.

49. The method of claim 34, wherein the coating comprises in the range of about 4 wt % to about 0 wt % of the at least one resin binder.

50. The method of claim 49, wherein the coating comprises in the range of about 15 wt % to about 45 wt % of the at least one resin binder.

51. An article coated via the method of claim 34.

35. A method of producing a low noise, good abrasion and weather resistant coating comprising:

(a) forming a pre-dispersion containing wax, cosolvents, UV absorbers and stabilizers and wetting agents; and

(b) adding silicone resin and at least one resin binder and at least one cross-linking agent to the pre-dispersion.

36. The method of claim 35, further comprising at least one UV stabilizer, UV absorber or mixture thereof.

37. The method of claim 35 wherein the at least one resin binder comprises a polyurethane resin, a blend of polyurethane resins or a blend of polyurethane resin and fluoropolymer.

38. The method of claim 37 wherein the at least one resin binder comprises a blend of aliphatic polyester polyurethane, fluorinated acrylic copolymers, Fluoro Ethylene-Alkyl Vinyl Ether, fluorinated alternative copolymers or mixtures thereof.

39. The method of claim 35 further comprising the step of adding one or more of the group comprising dispersing agents, rheology modifiers, amines, preservatives, wetting agents, co-solvents, carbon black, matting agents, chlorinated polyol, catalysts, aqueous colloidal silica and mixtures thereof.

40. The method of claim 35, further comprising the step of adding one or more of the group comprising epoxy, epoxy silane, carbodiimide, melamine, oxazoline, polyisocyanate, isocyanate, blocked isocyanate, aziridine, melamine-formaldehyde, polyaziridine, urea formaldehyde or mixtures thereof.

41. The method of claim 35, wherein the silicone resin has a molecular weight in the range from about 1,000 to about 800,000.

42. The method of claim 41, wherein the silicone resin comprises a blend of silicone resins having different molecular weights.

43. The method of claim 42, wherein the blend of silicone resins comprises a blend of three silicone resins having molecular weights in the ranges of about 1,000 to about 2,500;

about 5,000 to about 20,000; and

about 400,000 to about 800,000.

44. The method of claim 43, wherein the high molecular weight silicone resin is polydimethoxysiloxane.

45. The method of claim 35, wherein the coating comprises in the range of from about 0.1 wt % to about 30 wt % wax.