Zwitterionic/amphiphilic pentablock copolymers and coatings therefrom
A zwitterionic/amphiphilic pentablock copolymer was prepared using atom transfer radical polymerization (ATRP). The pentablock copolymer is prepared for the atom transfer radical polymerization of a PDMS-PEO-Br macroinitiator and SBMA. The pentablock copolymer is incorporated into a polyurethane coating composition which is useful for antifouling and/or fouling release applications.
1. A pentablock copolymer prepared from atom transfer radical polymerization of a Poly(dimethylsiloxane)-Poly(ethyleneoxide)-Br macroinitiator and [2-(Methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide).
2. A curable coating composition comprising: the pentablock copolymer according to claim 1 , a polyol and a polyisocyanate.
3. A curable coating composition according to claim 2 , wherein the polyol is selected from the group consisting of: polyester, polyether, polycarbonate, and acrylic.
4. A curable coating composition according to claim 3 , wherein the polyol is an an acrylic polyol.
5. A curable coating composition according to claim 2 , wherein the polyisocyanate is selected from the group consisting of: an aromatic isocyanate; a cycloaliphatic isocyanate; and an aliphatic isocyanate.
6. A curable coating composition according to claim 5 , wherein the polyisocyanate is a triisocyanurate resin prepared from isophorone diisocyanate.
7. A curable coating composition according to claim 2 , wherein the polyol is an acrylic polyol comprising 80% by weight butyl acrylate and 20% by weight of 2-hydroxyethyl acrylate and wherein the polyisocyanate is a triisocyanurate resin prepared from isophorone diisocyanate.
8. A curable coating composition according to claim 2 , wherein the copolymer comprises from about 1 to about 50 percent by weight of the coating composition.
9. A curable coating composition according to claim 8 , wherein the copolymer comprises from about 1 to about 15 percent by weight.
10. A cured coating prepared from the coating composition according to claim 2 , wherein the cured coating is non-fouling.
11. A cured coating according to claim 2 , wherein the cured coating is antifouling.
12. A cured coating according to claim 2 , wherein the cured coating has a hydrophilic surface.
13. An object coated with the curable coating composition according to claim 2 wherein the curable coating composition is subsequently cured.