US 12,077,467 B2
Member with porous layer and coating liquid for forming porous layer
Shun Ouchi, Kanagawa (JP); Shuhei Yamamoto, Tokyo (JP); and Tomonari Nakayama, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 16, 2021, as Appl. No. 17/477,034.
Claims priority of application No. 2020-161434 (JP), filed on Sep. 25, 2020; and application No. 2021-125004 (JP), filed on Jul. 30, 2021.
Prior Publication US 2022/0098093 A1, Mar. 31, 2022
Int. Cl. C03C 14/00 (2006.01); C03C 11/00 (2006.01); C03C 17/00 (2006.01); C03C 17/02 (2006.01); C03C 17/34 (2006.01); C03C 17/42 (2006.01); G02B 1/113 (2015.01)
CPC C03C 14/004 (2013.01) [C03C 11/002 (2013.01); C03C 17/007 (2013.01); C03C 17/02 (2013.01); C03C 17/3411 (2013.01); C03C 17/42 (2013.01); G02B 1/113 (2013.01); C03C 2217/425 (2013.01); C03C 2217/452 (2013.01); C03C 2217/465 (2013.01); C03C 2217/478 (2013.01); C03C 2217/732 (2013.01); C03C 2217/734 (2013.01); C03C 2217/76 (2013.01); C03C 2218/113 (2013.01); C03C 2218/116 (2013.01); C03C 2218/32 (2013.01)] 34 Claims
OG exemplary drawing
 
1. 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):

OG Complex Work Unit Chemistry
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.