Multilayer coating with visual effect
Embodiments of the invention relate generally to the field of multilayer color coatings, and more particularly to multilayer coatings comprising one or more gel coat layers and visual effect pigments.
1. A multilayer coating having a visual effect, the coating comprising:
a. a high clarity gel coat layer comprising an unsaturated polyester and a thixotropic agent having a size and surface that does not significantly impair the clarity of the gel coat layer;
b. a visual effect layer comprising a clear gel coat and a visual effect pigment; and
c. a color layer comprising a gel coat and a simple pigment.
2. The multilayer coating of claim 1 , wherein the visual effect is selected from the group consisting of sparkle, metallic effect, pearlescent effect, gloss, distinctness of image, coarseness, glint, glitter, texture, or a combination thereof.
3. The multilayer coating of claim 1 , wherein the visual effect is sparkle.
4. The multilayer coating of claim 1 , wherein the visual effect pigment is a metal-coated glass particle.
5. The multilayer coating of claim 4 , wherein the visual effect pigment has a particle size distribution of 35-150 microns.
6. The multilayer coating of claim 1 , wherein the high clarity gel coat layer comprises silica in an amount that is less than 2% by weight.
7. The multilayer coating of claim 1 , wherein the high clarity gel coat layer comprises silica having a BET surface area of 260-350 m 2 /g.
8. The multilayer coating of claim 1 , wherein the high clarity gel coat layer has a clarity of at least 94 on a white portion of a byko chart and/or a clarity of less than 26 on the black portion of a byko chart.
9. The multilayer coating of claim 1 , wherein the high clarity gel coat layer is formed by curing an unsaturated polyester resin containing styrene monomer and (meth)acrylic acid and/or an alkyl (meth)acrylate.
10. The multilayer coating of claim 1 , wherein one or more of the high clarity gel coat layer, the visual effect layer, or the color layer comprises one or more phthalate containing polyesters, vinyl containing polyesters or methyl methacrylate containing polyesters.
11. A method of manufacturing a multilayer coating having a visual effect, the method comprising:
applying a high clarity gel coat resin as a layer to a mold, wherein the resin is a high clarity gel coat resin comprising a thixotropic agent having a size and surface that does not significantly impair the clarity of the gel coat layer;
applying a visual effect resin directly or indirectly to the clear gel coat resin layer to form a visual effect layer;
applying a color resin directly or indirectly to the visual effect layer to form a color layer.
12. The method of claim 11 , wherein the high clarity gel coat resin is at least partially cured before the visual effect resin is applied.
13. The method of claim 11 , wherein the visual effect resin is at least partially cured before the color resin is applied.
14. The method of claim 11 , wherein the high clarity gel coat resin, the visual effect resin, and the color resin are applied by spraying.
15. The method of claim 11 , further comprising applying a thermosetting resin or a thermoplastic resin to the color layer.
16. The method of claim 11 , further comprising adhering the multilayer coating to a substrate to form an article.
17. The method of claim 16 , wherein the substrate is a surface of selected from the group consisting of watercrafts, wind mills, swimming pools, tubs, showers, sanitary ware, tanks, pipes, ducts, fume stacks, build panels, ships, electrical parts, aircraft components, and electronic components.
18. An article coated with the multilayer coating of claim 1 .
19. A visual effect gel coat resin comprising from 70 to 90 wt % high clarity gel coat resin and less than 2% at least one silica having a BET surface area of 260-350 m 2 /g, based on the total weight of the composition.
20. The visual effect get coat resin of claim 19 , wherein the resin comprising at least one unsaturated polyester resin.