Waterbased high abrasion resistant coating
View Patent ↗A coating for weatherstrips, windshield wipers, door seals, trunk seals, sunroof seals, windshield seals and the like. The coating comprises a water-based formula that provides high abrasion resistance and, optimally, also provides excellent weathering resistance. The abrasion resistance property is achieved via a combination of boron nitride and a high molecular weight silicone resin. Flexibility and weathering resistance are achieved via the addition of an acrylic/polyurethane/fluoropolymer resin binder blend and high UV-stabilizers and absorbers. Also provided is a method of manufacturing such coatings that comprises the steps of pre-dispersing the boron nitride in water and then combining the pre-dispersed boron nitride with the silicone resin and other ingredients.
1. A high abrasion and weather resistant water-based coating comprising boron nitride, silicone resin, a resin binder, and at least one crosslinking agent, wherein the resin binder comprises a blend of acrylic resin, polyurethane resin, and fluoropolymer.
2. The coating of claim 1 , further comprising at least one high UV stabilizer, high UV absorber or mixtures thereof.
3. The coating of claim 1 wherein the at least one resin binder comprises a blend of styrene acrylic, aliphatic polyester polyurethane, and Fluoro Ethylene-Alkyl Vinyl Ether.
4. The coating of claim 1 , wherein the ratio of acrylic resin to polyurethane resin to fluoropolymer is in the range of about 1:1:1 to about 1:5:10.
5. The coating of claim 1 further comprising one or more of the group comprising dispersing agents, rheology modifiers, amines, preservatives, wetting agents, co-solvents, carbon black, polyamide, chlorinated polyol, catalysts, and mixtures thereof.
6. The coating of claim 5 , further comprising 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.
7. The coating of claim 1 , wherein the silicone resin comprises a blend of silicone resins having different molecular weight ranges.
8. The coating of claim 1 , wherein the silicone resin is polydimethoxysiloxane.
9. The coating of claim 1 , wherein the coating comprises in the range of from about 0.1 wt % to about 20 wt % boron nitride.
10. The coating of claim 9 wherein the coating comprises in the range of about 0.5 to about 5 wt % boron nitride.
11. The coating of claim 1 , wherein the coating comprises in the range of about 1 wt % to about 40 wt % silicone resin.
12. The coating of claim 11 , wherein the coating comprises in the range of about 8 wt % to about 20 wt % silicone resin.
13. The coating of claim 1 , wherein the coating comprises in the range of about 4 wt % to about 30 wt % of the at least one resin binder.
14. The coating of claim 13 , wherein the coating comprises in the range of about 4 wt % to about 20 wt % of the at least one resin binder.
15. An article coated with the coating of claim 1 .
16. The article of claim 15 , wherein the article comprises a weatherstrip, windshield wiper or automotive seal.
17. A flock replacement coating for glass run comprising the coating of claim 1 .
18. An appearance coating for an outer belt comprising the coating of claim 1 .
19. A method of producing a high abrasion and weather resistant coating comprising:
(a) forming a pre-dispersion containing boron nitride and water; and
(b) adding silicone resin and at least one resin binder and at least one cross-linking agent to the pre-dispersion,
wherein the resin binder comprises a blend of arcylic resin polyurethane resin, and fluoropolymer.
20. The method of claim 19 , further comprising at least one high UV stabilizer, high UV absorber or mixture thereof.
21. The method of claim 19 wherein the at least one resin binder comprises a blend of styrene acrylic, aliphatic polyester polyurethane, and Fluoro Ethylene-Alkyl Vinyl Ether.
22. The method of claim 19 , wherein the ratio of acrylic resin to polyurethane resin to fluoropolymer is in the range of about 1:1:1 to about 1:5:10.
23. The method of claim 19 , 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, polyamide, chlorinated polyol, catalysts, and mixtures thereof.
24. The method of claim 23 , 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.
25. The method of claim 19 , wherein the silicone resin comprises a blend of silicone resins having different molecular weight ranges.
26. The method of claim 19 , wherein the silicone resin is polydimethoxysiloxane.
27. The method of claim 23 , wherein the coating comprises in the range of from about 0.1 wt % to about 20 wt % boron nitride.
28. The method of claim 27 , wherein the coating comprises in the range of about 0.5 to about 5 wt % boron nitride.
29. The method of claim 21 , wherein the coating comprises in the range of about 1 wt % to about 40 wt % silicone resin.
30. The method of claim 29 , wherein the coating comprises in the range of about 8 wt % to about 20 wt % silicone resin.
31. The method of claim 23 , wherein the coating comprises in the range of about 4 wt % to about 30 wt % of the at least one resin binder.
32. The method of claim 31 , wherein the coating comprises in the range of about 4 wt % to about 20 wt % of the at least one resin binder.
33. An article coated with the composition of claim 2 .
34. The article of claim 33 , wherein the article coated comprises a weatherstrip, windshield wiper or automotive seal.
35. A flock replacement coating for glass run comprising the composition of claim 1 .
36. An appearance coating for an outer belt comprising the composition of claim 1 .