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US 12,077,467 B2Granted
Member with porous layer and coating liquid for forming porous layer
AssigneeCanon Kabushiki Kaisha
InventorsShun Ouchi, Shuhei Yamamoto, Tomonari Nakayama
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Abstract
The present disclosure provides a member having a porous layer containing particles and having a low refractive index and high film strength and a coating liquid for forming a porous layer containing particles, wherein the porous layer contains a plurality of silicon oxide particles bound by an inorganic binder and at least one acid.
Claims34
A member having a porous layer on a substrate, wherein
- the porous layer contains a plurality of silicon oxide particles bound by an inorganic binder and at least one acid selected from the group consisting of the following formulae (1) to (4):
- wherein
- A1 in the formula (1) denotes COOH, and n denotes an integer in the range of 2 to 8,
- one of A2 and A3 in the formula (2) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a divalent organic group having 1 to 20 carbon atoms,
- at least one of A2, A3, and A4 in the formula (3) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a trivalent organic group having 1 to 20 carbon atoms, and
- at least one of A2, A3, A4, and A5 in the formula (4) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a tetravalent organic group having 1 to 20 carbon atoms.
3 more elements
A coating liquid comprising:
- silicon oxide particles;
- an organic solvent;
- and
- at least one acid selected from the group consisting of the following formulae (1) to (4):
- wherein
- A1 in the formula (1) denotes COOH, and n denotes an integer in the range of 2 to 8,
- one of A2 and A3 in the formula (2) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a divalent organic group having 1 to 20 carbon atoms,
- at least one of A2, A3, and A4 in the formula (3) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a trivalent organic group having 1 to 20 carbon atoms, and
- at least one of A2, A3, A4, and A5 in the formula (4) denotes SO3H or PO3H2, and the other denotes an acidic group selected from the group consisting of SO3H, PO3H2, COOH, and OH, and R denotes a tetravalent organic group having 1 to 20 carbon atoms.
6 more elements
Dependencies are inferred from the claim text.