Coating compositions comprising polymers having titanium/oxygen or silicon/oxygen backbones
A method to prepare a self-decontaminating surface, where that method includes disposing a first coating on a surface, where that first coating comprises an organosilane, and disposing a second coating over the first coating, where the second coating comprises TiO 2 .
1. A coating composition comprising:
an organosilane of structure (5),
wherein R 3 is alkyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; and
titanium (IV) isopropoxide.
2. The composition of claim 1 , wherein said organosilane is an organosilane of structure (1),
wherein R 1 and R 2 are alkyl, and X − is selected from the group consisting of chlorine, bromine, and iodine.
3. The composition of claim 1 , wherein said organosilane is an organosilane of structure (14),
wherein R is selected from the group consisting of methyl and ethyl; X − is selected from the group consisting of chlorine, bromine, and iodine; and p is from 1 to 5.
4. The composition of claim 1 , wherein R 8 comprises a C 18 alkyl chain.
5. The composition of claim 1 , wherein said organosilane and said titanium (IV) isopropoxide react to form a polymer of structure (6),
wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 5 and 500; n is 2; and p is 1.
6. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is 1; n is between about 5 and 500; and p is 1.
7. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is 2; n is between about 5 and 500; and p is 1, such that polymer (6) comprises a titanium/oxygen backbone with silyl ester end groups.
8. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 5 and 500; n is 2; and p is 1, such that polymer (6) comprises a titanium/oxygen backbone with silyl ester end groups, and wherein polymer (6) is substantially linear.
9. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is 2; n is between about 5 and 500; and p is 1, such that polymer (6) comprises a titanium/oxygen backbone with silyl ester end groups, and wherein polymer (6) is comprises a cross-linked structure.
10. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 5 and 500; n is 1; and p is 1.
11. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 5 and 500; n is 2; and p is 1, such that polymer (6) comprises a silicone/oxygen backbone with titanyl ester end groups.
12. The composition of claim 11 , wherein polymer (6) is substantially linear.
13. The composition of claim 11 , wherein polymer (6) comprises a cross-linked structure.
14. A self-decontaminating surface on a substrate formed by casting the coating composition of claim 11 onto the substrate.
15. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 1 and 10; n is between about 1 and 10; and p is between about 1 and 10, such that polymer (6) comprises titanyl ester end groups.
16. The composition of claim 15 , wherein polymer (6) is substantially linear or comprises a cross-linked structure.
17. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 1 and 10; n is between about 1 and 10; and p is between about 1 and 10, such that polymer (6) comprises silyl ester end groups.
18. A self-decontaminating surface on a substrate formed by casting the coating composition of claim 17 onto the substrate.
19. The composition of claim 5 , wherein R 3 is alkyl; R 4 is isopropyl; R 5 is selected from the group consisting of alkyl and oxyalkyl; R 6 , R 7 , and R 8 are selected from the group consisting of alkyl, alkenyl, phenyl, and benzyl; and X − is selected from the group consisting of chlorine, bromine, and iodine; m is between about 1 and 10; n is between about 1 and 10; and p is between about 1 and 10, such that polymer (6) comprises titanyl ester end groups.
20. A self-decontaminating surface on a substrate formed by casting the coating composition of claim 19 onto the substrate.