Water-repellent substrate

Patent metadata

Field	Value
Publication number	US-11118085-B2
Application number	US-201716335726-A
Country	US
Kind code	B2
Filing date	Sep 22, 2017
Priority date	Sep 23, 2016
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

The invention aims to provide a substrate whose water-repellency is less likely to be deteriorated even after long-term use in an ultraviolet-exposure environment. The substrate of the invention includes a surface-treating layer, and exhibits a static contact angle with water of 100 degrees or greater after a 400-hour accelerated weathering test performed under the following conditions:
<conditions of accelerated weathering test>
preparing a UVB-313 lamp exhibiting an irradiance of 0.63 W/m 2 at a wavelength of 310 nm; placing the surface-treating layer of the substrate apart from the lamp by 5 cm; and after every 24-hour irradiation, wiping the surface-treating layer with a cloth impregnated with water and with a cloth impregnated with ethanol, followed by drying.

First claim

The invention claimed is:

1. A substrate comprising a surface-treating layer,
the surface-treating layer containing a compound represented by the following formula (1):

wherein
R 1 is a monovalent organic group other than those containing a urethane bond represented by R 3 —(OR 2 ) a -L-, wherein (OR 2 ) a is a polyether chain; R 3 is an alkyl group or a fluorinated alkyl group; and L is —C 2 H 4 —, —C 3 H 6 —, —CO—O—CH 2 —CH(OH)—CH 2 —, —(CF 2 ) n , wherein n is an integer of 0 to 4, —CH 2 —, —C 4 H 8 —, or —(CF 2 ) n —(CH 2 ) m —, wherein n and m are each independently an integer of 0 to 4;
X 1 is a monovalent Si-containing group containing a hydrolyzable group; and
X 2 is a monovalent group,
the polyether chain being a chain represented by the following formula:
—(OC 6 F 12 ) m11 —(OC 5 F 10 ) m12 —(OC 4 F 8 ) m13 —(OC 3 X 10 6 ) m14 —(OC 2 F 4 ) m15 —(OCF 2 ) m16 —

wherein
m11, m12, m13, m14, m15, and m16 are each independently an integer of 0 or 1 or greater;
X 10 s are each independently H, F, or Cl; and
the repeating units are present in any order.

2. The substrate according to claim 1 ,
wherein the substrate is a glass substrate.

3. The substrate according to claim 2 ,
wherein the glass substrate is a sapphire glass substrate, a soda-lime glass substrate, an alkali aluminum silicate glass substrate, a borosilicate glass substrate, an alkali-free glass substrate, a lead glass substrate, or a quartz glass substrate.

4. The substrate according to claim 1 ,
wherein the substrate exhibits a static contact angle with water of 100 degrees or greater after a 400-hour accelerated weathering test performed under the following conditions:

<conditions of accelerated weathering test>
preparing a UVB-313 lamp exhibiting an irradiance of 0.63 W/m 2 at a wavelength of 310 nm; placing the surface-treating layer of the substrate apart from the lamp by 5 cm; and after every 24-hour irradiation, wiping the surface-treating layer with a cloth impregnated with water and with a cloth impregnated with ethanol, followed by drying.

5. The substrate according to claim 1 ,
wherein the substrate exhibits a static contact angle with water of 110 degrees or greater after a 250-hour accelerated weathering test performed under the following conditions:

<conditions of accelerated weathering test>
preparing a UVB-313 lamp exhibiting an irradiance of 0.63 W/m 2 at a wavelength of 310 nm; placing the surface-treating layer of the substrate apart from the lamp by 5 cm; and after every 24-hour irradiation, wiping the surface-treating layer with a cloth impregnated with water and with a cloth impregnated with ethanol, followed by drying.

6. The substrate according to claim 1 ,
wherein the substrate exhibits a static contact angle with water of 100 degrees or greater after 6000 processes of steel wool friction durability evaluation performed under the following conditions:

<conditions of steel wool friction durability evaluation>
bringing #0000-grade steel wool having dimensions of 5 mm×10 mm×10 mm into contact with the surface-treating layer of the substrate; applying a load of 1000 gf thereto; and reciprocating the steel wool at a rate of 140 mm/sec with the load, where one reciprocating motion is counted as one process.

Assignees

• Daikin Ind Ltd

Inventors

• Nose Masatoshi
• Yamashita Tsuneo
• Ozawa Kaori
• Mitsuhashi Hisashi

Classifications

• C08G65/33396 Primary

  having oxygen in addition to nitrogen · CPC title

• C09K3/00

  Materials not provided for elsewhere · CPC title

• C03C2218/151

  by vacuum evaporation · CPC title

• C08G65/007

  containing fluorine · CPC title

• C09D5/1637

  Macromolecular compounds · CPC title