Antisoiling coatings for antireflective surfaces and methods of preparation
Assignee3M Innovative Properties Company
InventorsJudith M. Invie, Mark J. Pellerite
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Abstract
An antisoiling coating for an antireflective surface, particularly the outer surface of an antireflective film stack, wherein the antisoiling coating includes a fluorinated siloxane, preferably prepared by applying a coating composition of a fluorinated silane, having a number average molecular weight of at least about 1000, of the following formula: Rƒ—[—R1—SiY3−xR2x]y (I) wherein: Rƒ is a monovalent or divalent polyfluoropolyether group; R1 is a divalent alkylene group, arylene group, or combinations thereof, R2 is a lower alkyl group; Y is a halide, a lower alkoxy group, or a lower acyloxy group; x is 0 or 1; and y is 1 or 2.
Claims43
An antireflective article comprising a substrate having an antireflective surface and an antisoiling coating that is at least partially cured thereon;
- wherein the antisoiling coating comprises a fluorinated siloxane prepared by applying a coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a monovalent or divalent polyfluoropolyether group;
- R1 is a substituted divalent alkylene group, arylene group, or combinations thereof, wherein at least one substituent in R1 is selected from the group consisting of heteroatoms and functional groups, and further wherein at least one substituent in R1 is optionally a halogen;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 1 or 2.
An antisoiling coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and an alkyl perfluoroalkyl ether, wherein the fluorinated silane has the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a monovalent or divalent polyfluoropolyether group;
- R1 is a substituted or unsubstituted divalent alkylene group, arylene group, or combinations thereof, wherein at least one substituent if present is selected from the group consisting of heteroatoms, functional groups, and halogens;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 1 or 2.
A method of applying an antisoiling coating to a substrate having an antireflective surface, the method comprising treating the antireflective surface with a coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a monovalent or divalent polyfluoropolyether group;
- R1 is a substituted divalent alkylene group, arylene group, or combinations thereof, wherein at least one substituent in R1 is selected from the group consisting of heteroatoms and functional groups, and further wherein at least one substituent in R1 is optionally a halogen;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 1 or 2.
An antireflective article comprising:
- a transparent substrate having a first surface and a second surface;
- an antireflective coating on at least a portion of the first surface;
- and
- an antisoiling coating disposed on the antireflective coating, wherein the antisoiling coating comprises siloxane groups and polyfluoropolyether segments covalently bonded to silicon via organic linking groups, wherein the polyfluoropolyether segments have a molecular weight of at least about 1000 and the organic linking groups include nitrogen atoms.
An antireflective article comprising:
- a transparent substrate comprising a flexible organic polymetric material having a first surface and a second surface;
- an antireflective coating on at least a portion of the first surface;
- a layer of a pressure sensitive adhesive disposed on the second surface of the substrate;
- and
- an antisoiling coating on at least a portion of the antireflective coating, wherein the antisoiling coating comprises siloxane groups and polyfluoropolyether segments covalently bonded to silicon via organic linking groups, wherein the polyfuoropolyether segments have a molecular weight of at least about 1000.
An antireflective article comprising a substrate having an antireflective surface and an antisoiling coating that is at least partially cured thereon;
- wherein the antisoiling coating comprises a fluorinated siloxane prepared by applying a coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a monovalent or divalent polyfluoropolyether group;
- R1 is a substituted or unsubstituted divalent alkylene groups, arylene group, or combinations thereof, wherein at least one substituent if present is selected from the group consisting of heteroatoms, functional groups, and halogens;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 1 or 2 and further wherein the antisoiling coating composition includes an alkyl perfluoroalkyl ether.
An antireflective article comprising a substrate having an antireflective surface and an antisoiling coating that is at least partially cured thereon;
- wherein the antisoiling coating comprises a fluorinated siloxane prepared by applying a coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a divalent polyfluoropolyether group;
- R1 is a substituted or unsubstituted divalent alkylene group, arylene group, or combinations thereof, wherein at least one substituent if present is selected from the group consisting of heteroatoms, functional groups, and halogens;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 2.
A method of applying an antisoiling coating to a substrate having an antireflective surface, the method comprising treating the antireflective surface with a coating composition comprising at least one fluorinated silane having a number average molecular weight of at least about 1000 and the following formula:
- Rƒ—[—R1—SiY3−xR2x]y (I)
- wherein:
- Rƒ is a divalent polyfluoropolyether group;
- R1 is a substituted or unsubstituted divalent alkylene group, arylene group, or combinations thereof, wherein at least one substituent if present is selected from the group consisting of heteroatoms, functional groups, and halogens;
- R2 is a C1-C4 alkyl group;
- Y is a halogen, a C1-C4 alkoxy group, or a C1-C4 acyloxy group;
- x is 0 or 1;
- and y is 2.
Dependencies are inferred from the claim text.