# US 11,898,343 B2 · Water-repellent member, and building member and wet room member using same

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- Number: US 11,898,343 B2
- Document ID: US11898343B2
- Status: Granted
- Kind: B2
- Application number: 17/440,989
- Filed: 2020-02-04
- Published: 2022-05-26
- Granted: 2024-02-13
- Earliest claimed: 2019-03-26
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Naoki Kurizoe; Natsuki Sato; Tatsuya Okuno; Ryosuke Sawa; Tatsuro Yoshioka
- Web page: https://patentgrep.com/patent/US11898343B2

## CPC

- C04B 30/00: Compositions for artificial stone, not containing binders
- E04B 1/62: Insulation or other protection; Elements or use of specified material therefor (chemical compositions C01 - C11; implements for applying insulation or sealings E04F21/00; buildings to withstand, or to provide protection against, external undesired influences E04H9/00; sealing pipes in walls or partitions F16L5/02; shielding against dangerous radiation G21F)
- C04B 28/06: Aluminous cements (monolithic refractories or refractory mortars C04B35/66)
- C04B 38/0038: {by superficial sintering or bonding of particulate matter}
- C09K 3/18: for application to surfaces to minimize adherence of ice, mist or water thereto (rendering particulate materials free flowing, in general, e.g. making them hydrophobic B01J2/30); Thawing or antifreeze materials for application to surfaces (used in liquids for heat-transfer, heat-exchange or heat-storage or for the production of heat or cold other than by combustion, e.g. radiator liquids, C09K5/00)
- C04B 38/00: Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof (treating slag with gases or gas generating material C04B5/06 {; expanded graphite C04B35/536})
- C04B 2111/27: Water resistance, i.e. waterproof or water-repellent materials
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A water-repellent member includes a matrix part including an inorganic substance including at least one of a metal oxide or a metal hydroxide, and a water-repellent resin present in a dispersed state inside the matrix part. The water-repellent member has a porosity of 20% or less in a section of the matrix part. A building member and a wet room member each include the water-repellent member.

## Claims

### Claim 1

A water-repellent member, comprising:
a matrix part that comprises a plurality of particles of an inorganic substance including at least one of a metal oxide or a metal hydroxide and is formed by the particles of the inorganic substance bonding each other, the matrix part having a thickness of 50 μm or more; and
a water-repellent resin present in a dispersed state inside the matrix part,
wherein the water-repellent member has a porosity of 20% or less in a section of the matrix part, and
the water-repellent resin is not continuously present from a surface of the matrix part to an inside of the matrix part.

### Claim 2 (depends on 1)

The water-repellent member according to claim 1, wherein the water-repellent resin is not present in a film shape on the surface of the matrix part.

### Claim 3 (depends on 1)

The water-repellent member according to claim 1, wherein the matrix part has a volume ratio larger than that of the water-repellent resin.

### Claim 4 (depends on 1)

The water-repellent member according to claim 1, wherein the matrix part is hydrophilic.

### Claim 5 (depends on 1)

The water-repellent member according to claim 1, wherein a static contact angle with water is 90° or more.

### Claim 6 (depends on 1)

The water-repellent member according to claim 1, wherein the matrix part has no gap communicating from the surface of the matrix part to the inside of the matrix part.

### Claim 7 (depends on 1)

The water-repellent member according to claim 1, wherein the water-repellent member has the porosity of 10% or less in the section of the matrix part.

### Claim 8 (depends on 1)

The water-repellent member according to claim 1, wherein the inorganic substance is a polycrystalline substance.

### Claim 9 (depends on 1)

The water-repellent member according to claim 1, wherein the water-repellent resin is present at grain boundaries of particles of the inorganic substance.

### Claim 10 (depends on 1)

A building member, comprising:
the water-repellent member according to claim 1.

### Claim 11 (depends on 1)

A wet room member, comprising:
the water-repellent member according to claim 1.