Anti-frost coating and the application method thereof

• US 8,372,484 B2
• Filed: 01/21/2009
• Issued: 02/12/2013
• Est. Priority Date: 01/31/2008
• Status: Expired due to Fees

• Current Assignee: Institute of Chemistry Chinese Academy of Sciences (Chinese Academy of Sciences)
• Original Assignee: Institute of Chemistry Chinese Academy of Sciences (Chinese Academy of Sciences)
• Inventors: He, Min, Song, Yanlin, Liu, Biqian
• Primary Examiner(s): CAMERON, ERMA C
• Application Number:
  US12/864,607
• Publication Number:
  US 20100316806A1
• Time in Patent Office: 1,483 Days
• Field of Search: None
• US Class Current: 427/350
• CPC Class Codes: B05D 2202/25 based on Al
• CPC Class Codes: B05D 5/04 to obtain a surface receptive to ink or other liquid B05D5/02, B41M5/52 take precedence
• CPC Class Codes: B05D 5/08 to obtain an anti-friction or anti-adhesive surface rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 33/066 containing -OH groups
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 33/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C08L 33/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: C09D 133/066 containing -OH groups
• CPC Class Codes: C09D 133/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09D 133/12 Homopolymers or copolymers of methyl methacrylate
• CPC Class Codes: C09D 133/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: C09D 5/00 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 Class Codes: F25D 23/065 Details
• CPC Class Codes: Y02P 20/10 Process efficiency

Abstract

The present invention provides an anti-frost coating, which forms a coat having a hydrophilic and hydrophobic composite structure after being applied on a substrate, and contains a hydrophobic polymer and a hydrophilic polymer. The application method of the anti-frost coating comprises: dissolving the hydrophilic polymer and the hydrophobic polymer in a solvent to form a homogeneous solution, coating the solution on a substrate to form a film, drying and curing to form an anti-frost coat with a hydrophilic and super-hydrophobic composite structure including a super-hydrophobic surface layer and a hydrophilic inner layer. Water drips can roll off easily and the dust and impurities deposited on the surface can be easily removed. The anti-frost effect is desirable.

Claims

1. An application method of an anti-frost coating, comprising:

dissolving a hydrophilic polymer and a hydrophobic polymer in an organic solvent to form a homogeneous solution, coating the homogeneous solution on a substrate to form a film, drying and curing the film to form the anti-frost coat with a hydrophilic and super-hydrophobic composite structure including a super-hydrophobic surface layer and a hydrophilic inner layer;

wherein

the hydrophobic polymer is one of polyacrylate, polyolefin and fluorine containing polyacrylate or their mixture;

or a copolymer of acrylate and fluorine containing acrylate;

the hydrophilic polymer is sodium polyacrylate, polyacrylic acid, poly(2-hydroxypropyl methacrylate) or their mixture;

or a copolymer of two or more of sodium acrylate, acrylic acid and 2-hydroxyethyl methacrylate;

the organic solvent is one or more of dioxane, xylene, N,N-dimethyl formamide, N,N-dimethyl acetamide and methanol; and

the drying and curing pressure is 10-1000 Pa, the super-hydrophobic refers to a water contact angle greater than 150°

.

2. The method according to claim 1, wherein the hydrophilic polymer and the hydrophobic polymer are dissolved in a same organic solvent at 60-130°

C.

3. The method according to claim 1, wherein the drying and curing temperature is 20-60°

C.

4. The method according to claim 1, the acrylate is butyl acrylate, methyl methacrylate, or their mixture;

the fluorine containing acrylate is hexafluorobutyl acrylate, perfluorodecoyloxyl ethyl acrylate, or their mixture;

the polyacrylate is poly(methyl acrylate), poly(methyl methacrylate), poly(butyl acrylate) or their mixture;

the fluorine containing polyacrylate is poly(hexafluorobutyl acrylate), poly(perfluorodecoyloxyl ethyl acrylate) or their mixture; and

the polyolefin is polypropylene.