초록 ▼

Described are compositions containing fluorinated polyether isocyanate derived silane compounds for treating substrates such as hard surfaces, e.g. ceramic and/or glass, to render them oil and water repellent, and stain resistant, articles having coatings comprising such compounds, and methods for a

Described are compositions containing fluorinated polyether isocyanate derived silane compounds for treating substrates such as hard surfaces, e.g. ceramic and/or glass, to render them oil and water repellent, and stain resistant, articles having coatings comprising such compounds, and methods for applying such coatings.

대표청구항 ▼

The invention claimed is: 1. A composition comprising a mixture of: (a) a perfluoropolyether urethane or urea silane or a mixture thereof comprising the reaction product of: (i) a fluorinated polyether compound of the formula (T′)y-Rf-T  (I) wherein Rf is a monovalent or di

The invention claimed is: 1. A composition comprising a mixture of: (a) a perfluoropolyether urethane or urea silane or a mixture thereof comprising the reaction product of: (i) a fluorinated polyether compound of the formula (T′)y-Rf-T  (I) wherein Rf is a monovalent or divalent polyfluoropolyether group; T and T′ each independently represent —CO2R3, where R3 is hydroxyalkyl, or —C(O)N(R1)(R2), where R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine and R2 is hydrogen or R1; and y is 0 or 1; and (ii) a silane compound of the formula T″-Q″-SiY3-xR′x  (II) wherein T″ is —NCO; Q″ is —(CnH2n)—, where n is 2 to 6 ; R′ is an alkyl group of 1-4 carbon atoms; Y is a C1-C4 alkoxy group, a halide, an acyloxy group, or a polyoxyalkylene group; and x is 0 or 1; and (b) an organic solvent. 2. The composition according to claim 1 wherein T and T′ each independently represent —C(O)N(R1)(R2), where R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine, and R2 is hydrogen. 3. The composition according to claim 1 wherein R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine, and R2 is hydrogen. 4. A composition according to claim 1, further comprising a fluorosurfactant. 5. A composition according to claim 4, wherein the fluorosurfactant has the structure wherein the molar ratio of a:b:c is about 30:about 1 :about 32 and wherein the molecular weight of the fluorosurfactant is about 1,000 to about 4,000 grams per mole, or wherein the fluorosurfactant has the structure wherein the molar ratio of a′:b′:c′ is about 3:about 3:about 1 and wherein the molecular weight of the fluorosurfactant is about 2,000 to about 40,000 grams per mole, or mixtures thereof. 6. A composition according to claim 1, wherein said organic solvent is an aliphatic alcohol, a ketone, an ester, an ether, an amide, or a mixture thereof. 7. A composition according to claim 1, wherein said organic solvent comprises a fluorinated organic solvent. 8. A composition according to claim 1, wherein Rf in Formula (I) is of the formula: —((Rf3)q′—Rf2—O)z′—Rf1—(O—Rf2—(Rf3)q)z—  (III) wherein Rf1 is a perfluorinated alkyl or a perfluorinated alkylene group, Rf2 is a perfluorinated polyalkyleneoxy group consisting of perfluorinated alkyleneoxy groups having 1, 2, 3 or 4 carbon atoms or a mixture of such perfluorinated alkyleneoxy groups; Rf3 is a perfluorinated alkylene group or a substituted perfluorinated alkyl group; q and q′ are independently chosen from 0 or 1; z is from 4 to 30, and z′ is 0 to 30. 9. A composition according to claim 8, wherein Rf2 comprises repeating units selected from the group consisting of —(CnF2nO)—,—(CF(Z)O)—, —(CnF2nCF(Z)O)—, and —(CF2CF(Z)O)—, and combinations thereof, wherein n is at least 1 and wherein Z is a fluorine atom, a perfluoroalkyl group, a substituted perfluoroalkyl group, an oxygen-substituted perfluoroalkyl group, a perfluoroalkoxy group, or an oxygen-substituted perfluoroalkoxy group. 10. A composition according to claim 8, wherein Rf3 comprises repeating units selected from the group consisting of —(CnF2n)— and —(CF(Z))—, and combinations thereof, wherein n is at least 1 and wherein Z is a fluorine atom, a perfluoroalkyl group, a substituted perfluoroalkyl group, an oxygen-substituted perfluoroalkyl group, a perfluoroalkoxy group, or an oxygen-substituted perfluoroalkoxy group. 11. A composition according to claim 1, wherein Rf is —CF2O(CF2O)m(C2F4O)pCF2—, —CF2O(C2F4O)pCF2—, CF(CF3)(OCF2(CF3)CF)pO(CF2)mO(CF(CF3)CF2O)pCF(CF3)—, CF3CF2CF2O(CF(CF3)CF2O)pCF(CF3)—, or combinations thereof, where an average value for m and p is 0 to 50 and m and p are not independently 0. 12. A composition according to claim 1 wherein Rf is CF3CF2O(CF2O)m—(C2F4O) pCF2—, CF(CF3)(OCF2(CF3)CF) pO(CF2) mO(CF(CF3)CF2O)pCF(CF3)—, CF3CF2O(C2F4O) pCF2—, CF3CF(CF3)O—(CF(CF3)CF2O)pCF(CF3)—, or combinations thereof, where an average value for m and p is 0 to 50 and m and p are not independently 0. 13. A method for treating a substrate comprising the step of applying a composition according to claim 1 to said substrate. 14. The method according to claim 13, wherein said method further comprises curing the applied composition at elevated temperature. 15. The method according to claim 13, wherein said substrate is a ceramic or a glass substrate. 16. The method according to claim 13, wherein the substrate is an antireflective surface, wherein said coating composition forms an antisoiling coating thereon. 17. A composition comprising: (a) a perfluoropolyether urethane or urea silane or a mixture thereof comprising the reaction product of: (i) a fluorinated polyether compound of the formula (T′)y-Rf-T  (I) wherein Rf is a monovalent or divalent polyfluoropolyether group; T and T′ each independently represent —CO2R3, where R3 is hydroxyalkyl, or —C(O)N(R1)(R2), where R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine and R2 is hydrogen or R1; and y is 0 or 1; and (ii) a silane compound of the formula T″-Q″-SiY3-xR′x  (II) wherein T″ is —NCO; Q″is —(CnH2n)—, where n is 2 to 6; R′ is an alkyl group of 1-4 carbon atoms; Y is a C1-C4 alkoxy group, a halide, an acyloxy group, or a polyoxyalkylene group; and x is 0 or 1. 18. The composition according to claim 17 wherein T and T′ each independently represent —C(O)N(R1)(R2), where R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine, and R2 is hydrogen. 19. The composition according to claim 17 wherein R1 is hydroxyalkyl, dihydroxypropyl, or polyalkylenepolyamine, and R2 is hydrogen. 20. An article having a surface, at least a portion of said surface having a coating thereon, said coating comprising a composition according to claim 17. 21. The article of claim 20 wherein said article is a ceramic or glass substrate.