Polymer thin film with water repellency and oil repellency and method for preparing the same

Patent metadata

Field	Value
Publication number	US-11396705-B2
Application number	US-201916379104-A
Country	US
Kind code	B2
Filing date	Apr 9, 2019
Priority date	Dec 6, 2013
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

This disclosure relates to a method for preparing a polymer thin film with water repellency and oil repellency, including: thermally decomposing a thermal initiator to form a radical; reacting the radical with a monomer mixture of a specific composition to synthesize a polymer; and depositing the synthesized polymer on a substrate, and a polymer thin film with water repellency and oil repellency including a polymer resin including (meth)acrylate-based repeat units substituted with a fluorine-containing functional group and repeat units derived from a compound including at least two reactive functional groups at a specific ratio.

First claim

What is claimed is:

1. A polymer thin film comprising: a polymer resin comprising (meth)acrylate-based repeat units substituted with a fluorine-containing functional group; and repeat units derived from a reactive compound comprising at least two vinyl groups or (meth)acrylate-based functional groups at a mole ratio of 100:13 to 100:50, and
having a static contact angle of 120° or more with 3 μl of distilled water and a static contact angle of 80° or more with 3 μl of oleic acid,
wherein the polymer thin film has a sliding angle of 30° or less with 30 μl of oleic acid, and
the polymer thin film has pencil hardness of HB or higher, as measured using a 500 g weight according to ASTM D3363.

2. The polymer thin film according to claim 1 ,
wherein the polymer thin film has average surface roughness of 15 nm or less, and average surface roughness per 100 nm of 3 nm or less.

3. The polymer thin film according to claim 1 ,
wherein the polymer thin film has a static contact angle of 120° to 140° with 3 μl of distilled water, and a static contact angle of 80° to 120° with 3 μl of oleic acid.

4. The polymer thin film according to claim 1 ,
wherein the polymer thin film has a thickness of 10 nm to 1000 nm.

5. The polymer thin film according to claim 1 , wherein the polymer resin has weight average molecular weight of 10,000 to 1,000,000.

6. The polymer thin film according to claim 1 ,
wherein the polymer thin film is prepared by chemical vapor deposition using a thermal initiator.

7. The polymer thin film according to claim 6 , wherein the chemical vapor deposition comprising the steps of:
thermally decomposing the thermal initiator of a gas phase to form a radical;
reacting the formed radical with a monomer mixture comprising (meth)acrylate-based monomers substituted with a fluorine-containing functional group and a reactive compound comprising at least two vinyl groups or (meth)acrylate-based functional groups to synthesize a polymer; and
depositing the synthesized polymer on a substrate,
wherein a ratio of deposition partial pressure of the following General Formula 1 of the reactive compound comprising at least two vinyl groups or (meth)acrylate-based functional groups to deposition partial pressure of the following General Formula 1 of the (meth)acrylate-based monomers substituted with a fluorine-containing functional group is 0.13 to 0.50:
Deposition partial pressure= Pm/P sat  [General Formula 1]

wherein, in the General Formula 1,
Psat denotes saturation vapor pressure of corresponding monomers or compounds at a surface temperature of a substrate on which the synthesized polymer is deposited, and
Pm denotes partial pressure of corresponding monomers or compounds in a reactor in which the deposition is progressed.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Eun Jeong
• Kim Ki-Hwan
• Park Chan Hyoung

Classifications

• B05D5/083 Primary

  involving the use of fluoropolymers · CPC title

• C23C18/02 Primary

  by thermal decomposition · CPC title

• B05D1/60

  Deposition of organic layers from vapour phase (vapour phase deposition in general C23C14/00, C23C16/00) · CPC title

• B05D1/34

  Applying different liquids or other fluent materials simultaneously · CPC title

• C23C16/44

  characterised by the method of coating (C23C16/04 takes precedence) · CPC title