Film and substrate having surface covered with same

Patent metadata

Field	Value
Publication number	US-12378432-B2
Application number	US-202217735565-A
Country	US
Kind code	B2
Filing date	May 3, 2022
Priority date	Nov 5, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

An object of the present disclosure is to provide a film that has high water slidability, and a substrate having a surface covered with the film. The present disclosure provides a film having the properties of a sliding velocity of 150 mm/s or more at an inclination angle of 30° and an average surface roughness (Ra) of 1 μm or less, and further provides a substrate having a surface covered with the film.

First claim

The invention claimed is:

1. A base material having a surface directly coated with an insulating film for an electrowetting element, the insulating film comprising a fluoropolymer,
the fluoropolymer containing a monomer unit represented by the following formula (1-11):

in an amount of 100 mol %, based on the total monomer units,
the insulating film for an electrowetting element being a monolayer film, and
the insulating film for an electrowetting element having the following properties:
a sliding velocity of 150 mm/s or more at an inclination angle of 30° and
an average surface roughness (Ra) of 1 μm or less.

2. The base material according to claim 1 , wherein the insulating film for an electrowetting element further has the following property: a contact angle of 100° to 130°, wherein a liquid to determine the contact angle is water.

3. The base material according to claim 1 , wherein the insulating film for an electrowetting element further has the following property: a total light transmittance of 90% or more.

4. The base material according to claim 1 , wherein the insulating film for an electrowetting element further has the following property: a sliding angle of 15° or less.

5. The base material according to claim 1 , wherein the insulating film for an electrowetting element has an average film thickness of 10 nm or more.

6. The base material according to claim 1 , wherein the fluoropolymer has a glass transition temperature (Tg) of 100° C. or more.

7. The base material according to claim 1 , wherein the base material is a glass base material or a plastic base material.

8. The base material according to claim 1 , wherein the base material is a substrate for an electrowetting element.

9. The base material according to claim 1 , wherein the insulating film for an electrowetting element contains the fluoropolymer in an amount of 80 mass % or more, based on the total mass of the film.

Assignees

• Daikin Ind Ltd

Inventors

• Morita Masamichi
• Yamaguchi Hiroki
• Sakakura Atsushi
• Hosoda Kazuki

Classifications

• C08F24/00

  Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen (cyclic esters of polyfunctional acids C08F18/00; cyclic anhydrides of unsaturated acids C08F20/00, C08F22/00) · CPC title

• C09K3/18

  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) · CPC title

• C09D129/14

  Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols · CPC title

• C08F116/38

  by a acetal or ketal radical · CPC title

• C09D137/00 Primary

  Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen (based on polymers of cyclic esters of polyfunctional acids C09D131/00; based on polymers of cyclic anhydrides of unsaturated acids C09D135/00); Coating compositions based on derivatives of such polymers · CPC title