Multi-layer composites
View Patent ↗Multi-layer composite structures offer improved weatherability and adhesion to fiber-reinforced plastic substrates when compared to structures now available. These composites have an outer layer made from a polyacrylate, a second layer made from an acrylonitrile-styrene-acrylate rubber terpolymer; a third layer made from an ABS polymer; and optionally a fourth layer made from a polyacrylate. The layers include one or more layers having an improvement selected from among: (a) the improvement wherein the second layer is made from an acrylate-modified acrylonitrile-styrene-acrylate rubber terpolymer; (b) the improvement wherein the third layer is a modified ABS that further includes a polymer modifier that decreases the softening of the ABS on contact with styrene, and an acrylonitrile-styrene-acrylate rubber terpolymer; and (c) the improvement wherein the fourth layer is present and is a polyacrylate. This composite can be applied to a fiber-reinforced plastic substrate such as fiberglass as a coating.
1. A composite comprising, in sequence,
an outer layer comprising acrylic,
a second layer comprising acrylonitrile-styrene-acrylate rubber terpolymer;
a third layer comprising an ABS polymer; and
a polyacrylate fourth layer.
2. The composite of claim 1 , wherein the outer layer is a UV stabilized acrylic.
3. The composite of claim 2 , wherein the second layer of the composite comprises an acrylate-modified acrylonitrile-styrene-acrylate rubber terpolymer.
4. The composite of claim 3 , wherein the third layer of the composite comprises ABS, an acrylonitrile-styrene-acrylate rubber terpolymer and a polymer modifier that decreases the softening of the ABS on contact with styrene.
5. The composite of claim 4 , wherein the polymer modifier in the third layer is a polyacrylate.
6. The composite of claim 5 , wherein the polyacrylate is polymethylmethacrylate.
7. A composite according to claim 1 , wherein the composite further comprises a fiber reinforced plastic substrate adhered to the fourth layer.
8. The composite of claim 7 , wherein the outer layer is a UV stabilized acrylic.
9. The composite of claim 8 , wherein the second layer of the composite is a rubber modified acrylonitrile-styrene-acrylate rubber terpolymer.
10. The composite of claim 9 , wherein the third layer of the composite comprises ABS, an acrylonitrile-styrene-acrylate rubber terpolymer and a polymer modifier that decreases the softening of the ABS on contact with styrene.
11. The composite of claim 10 , wherein the polymer modifier in the third layer is a polyacrylate.
12. The composite of claim 11 , wherein the polyacrylate is polymethylmethacrylate.
13. The composite of claim 7 , wherein the third layer of the composite comprises ABS, an acrylonitrile-styrene-acrylate rubber terpolymer and a polymer modifier that decreases the softening of the ABS on contact with styrene.
14. The composite of claim 13 , wherein the polymer modifier in the third layer is a polyacrylate.
15. The composite of claim 14 , wherein the polyacrylate is polymethylmethacrylate.
16. The composite of claim 1 , wherein the third layer further comprises polycarbonate.
17. A composite comprising, in sequence,
an outer layer comprising acrylic,
a second layer comprising acrylonitrile-styrene-acrylate rubber terpolymer and;
a third layer comprising an ABS polymer; wherein the third layer of the composite comprises ABS a modified ABS polymer; wherein the modified ABS polymer comprises ABS, an acrylonitrile-styrene-acrylate rubber terpolymer and a polymer modifier that decreases the softening of the ABS on contact with styrene.
18. The composite of claim 17 , wherein the polyacrylate in the third layer is a polyacrylate.
19. The composite of claim 18 , wherein the polymer modifier is polymethylmethacrylate.
20. The composite according to claim 17 , wherein the composite further comprises a fiber reinforced plastic substrate adhered to the third layer.
21. The composite of claim 20 , wherein the polymer modifier in the third layer is a polyacrylate.
22. The composite of claim 21 , wherein the polyacrylate is polymethylmethacrylate.
23. The composite of claim 20 , wherein the composite further includes a UV stabilized acrylic top layer.
24. The composite of claim 23 , wherein the second layer comprises a rubber modified acrylonitrile-styrene-acrylate rubber terpolymer.
25. The composite of claim 17 , wherein the outer layer is a UV stabilized acrylic.
26. The composite of claim 17 , wherein the third layer further comprises polycarbonate.