Sanitary facility and method for manufacturing sanitary facility

Patent metadata

Field	Value
Publication number	US-12378436-B2
Application number	US-202117910089-A
Country	US
Kind code	B2
Filing date	Mar 12, 2021
Priority date	Mar 13, 2020
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

Provided is a means for imparting hydrophilicity to a surface of a sanitary facility by means other than hydrophilic particles. A sanitary facility having a hydrophilized organic surface, wherein the hydrophilized organic surface has at least an organic cationic group, and a zeta potential at pH=7 of the hydrophilized organic surface is more than −40 mV.

First claim

The invention claimed is:

1. A sanitary facility having a hydrophilized organic surface,
the hydrophilized organic surface having at least an organic cationic group, and
a zeta potential more than −40 mV at pH=7.

2. The sanitary facility according to claim 1 , wherein the hydrophilized organic surface has a static contact angle of water of 40° or less.

3. The sanitary facility according to claim 1 , wherein the hydrophilized organic surface has a static contact angle of water of 40° or less after being brought into contact with an aqueous solution containing a cationic surfactant and then washed with water.

4. The sanitary facility according to claim 1 , wherein the organic cationic group of the hydrophilized organic surface is a group bonded to a carbon atom constituting the hydrophilized organic surface.

5. The sanitary facility according to claim 1 , wherein
the hydrophilized organic surface has an organic cationic group and an organic anionic group, and
each of the organic cationic group and the organic anionic group is a group bonded to a carbon atom constituting the hydrophilized organic surface.

6. The sanitary facility according to claim 1 , wherein the organic cationic group is a quaternary ammonium cationic group.

7. The sanitary facility according to claim 5 , wherein the organic cationic group is a quaternary ammonium cationic group, and
the organic anionic group is at least one of a sulfonic acid group and an alkali metal salt of a sulfonic acid group.

8. The sanitary facility according to claim 1 , wherein
a zeta potential Ei (mV) at pH=7 of the hydrophilized organic surface, and
a zeta potential Ec (mV) at pH=7 after being brought into contact with an aqueous solution containing a cationic surfactant and then washed with water satisfy a relationship represented by a following formula:
|Ec−Ei| <50

9. A hydrophilizing treatment agent set for manufacturing the sanitary facility according to claim 1 ,
the hydrophilizing treatment agent set comprising:
a first treatment agent comprising a silane coupling agent having a radical reactive group; and
a second treatment agent comprising:
an anionic compound having a radical reactive group and an organic anionic group, and
a cationic compound having a radical reactive group and an organic cationic group.

10. The hydrophilizing treatment agent set according to claim 9 , wherein
the organic anionic group is at least one of a sulfonic acid group and an alkali metal salt of a sulfonic acid group, and
the organic cationic group is a quaternary ammonium cationic group.

11. The hydrophilizing treatment agent set according to claim 9 , wherein
the radical reactive group of the silane coupling agent, the radical reactive group of the anionic compound, and the radical reactive group of the cationic compound are each independently at least one selected from among an acrylamide group, an acryloyl group, a methacryloyl group, an allyl group, a vinyl group, a styryl group, and a mercapto group.

12. A method for manufacturing the sanitary facility according to claim 1 ,
the method comprising:
a first treatment agent application step of applying a first treatment agent comprising a silane coupling agent having a radical reactive group to a surface of an article to be coated, and
a second treatment agent application step of applying a second treatment agent comprising an anionic compound having a radical reactive group and an organic anionic group and a cationic compound having a radical reactive group and an organic cationic group to the surface to which the first treatment agent has been applied.

13. The method for manufacturing according to claim 12 , wherein
the organic anionic group is at least one of a sulfonic acid group and an alkali metal salt of a sulfonic acid group, and
the organic cationic group is a quaternary ammonium cationic group.

14. The method for manufacturing according to claim 12 , further comprising a radical reaction acceleration step of applying heat or an active energy ray after the second treatment agent application step.

Assignees

• Lixil Corp
• Nippon Paint Automotive Coatings Co Ltd

Inventors

• Nakashima Yusuke
• Nakase Takahito
• Sato Yusuke
• Takemoto Yugo
• Maejima Kiyoe

Classifications

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C08G77/442

  containing vinyl polymer sequences · CPC title

• E03D11/02

  Water-closet bowls (auxiliary chambers with connections to flushing water for bowl-cleaning utensils E03D9/06; modified for using upwardly-directed sprays E03D9/08; seats or covers A47K13/00 ){; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl (parts or details of bowls E03D11/13)} · CPC title

• A47K3/02

  Baths (combined with showers A47K3/20) · CPC title

• C09D183/10 Primary

  Block or graft copolymers containing polysiloxane sequences (obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09D151/08, C09D153/00) · CPC title