Waterbased low noise generating coating
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.
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 .
17 . The article of claim 19 , wherein the article comprises a weatherstrip, windshield wiper or automotive seal.
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.
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.
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.
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 .