Methods of making highly durable superhydrophobic, oleophobic and anti-icing coatings
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-009/04
B32B-027/40
G11B-005/65
C09K-003/18
C09D-007/12
D06M-011/79
D06M-015/564
D06M-023/08
C03C-015/00
C03C-017/30
C03C-019/00
F25D-025/02
C23C-004/10
C23C-004/12
F25D-023/00
C08K-003/22
C08K-003/34
C08K-003/40
C08K-009/08
출원번호
US-0320358
(2014-06-30)
등록번호
US-9279073
(2016-03-08)
발명자
/ 주소
Bleecher, Douglas
Harsh, Philip
Hurley, Michael
Jones, Andrew K.
Ross, Russell
Sikka, Vinod K.
Zielke, Donald
출원인 / 주소
Ross Technology Corporation
대리인 / 주소
Perkins Coie LLP
인용정보
피인용 횟수 :
4인용 특허 :
348
초록▼
Disclosed are methods of preparing durable hydrophobic, oleophobic, and anti-icing coatings on a substrate comprising the application of a binder containing particles to the substrate and the application of hydrophobic and oleophobic particles to the binder. In the resulting coating, the particles a
Disclosed are methods of preparing durable hydrophobic, oleophobic, and anti-icing coatings on a substrate comprising the application of a binder containing particles to the substrate and the application of hydrophobic and oleophobic particles to the binder. In the resulting coating, the particles applied with the binder are primarily distributed within and coated by the binder and the hydrophobic/oleophobic particles are distributed on or at the exposed surface where they can interact with liquids.
대표청구항▼
1. A method of preparing a hydrophobic coating on a substrate comprising: a) applying to said substrate a coating composition, comprising i) a binder, ii) first particles having a size of about 30 microns to about 225 microns, and iii) a solvent, to provide a base coating; andb) applying to said bas
1. A method of preparing a hydrophobic coating on a substrate comprising: a) applying to said substrate a coating composition, comprising i) a binder, ii) first particles having a size of about 30 microns to about 225 microns, and iii) a solvent, to provide a base coating; andb) applying to said base coating a composition comprising second particles, wherein, prior to the application of the second particles to the base coating, i) the second particles have been modified with hexamethyldisilazane,ii) the second particles comprise covalently bound polydimethylsiloxane, oriii) the second particles comprise one or more covalently bound moieties independently selected from the group consisting of alkyl, haloalkyl, and perfluoroalkyl moieties, which one or more moieties are covalently bound to said second particles by reaction of particles with a silanizing agent of formula (I), said silanizing agent of formula (I) having the structure: R4-nSi—Xn (I)where n is an integer from 1 to 3;each R is independently selected from (i) C1 to 20 alkyl optionally substituted with one or more fluorine atoms; or(ii) —Z—((CF2)q(CF3))r, wherein Z is a C1-12 divalent alkane radical or a C2-12 divalent alkene or alkyne radical, q is an integer from 1 to 12, and r is an integer from 1-4;each X is independently selected from the group consisting of —H, —Cl, —I, —Br, —OH, —OR2, NHR3, and —N(R3)2;each R2 is an independently selected C1 to 4 alkyl or haloalkyl group; andeach R3 is an independently selected H, C1 to 4 alkyl or haloalkyl group;wherein the hydrophobic coating has a contact angle with water that is greater than about 120° at a temperature of 18° C. to 23° C.;wherein the hydrophobic coating has a surface in contact with the substrate and an exposed surface comprising the binder that is not in contact with the substrate, the exposed surface having an arithmetical mean roughness from about 0.2 microns to about 20 microns, or a ten point mean roughness from about 1 micron to about 100 microns;wherein, in the resulting hydrophobic coating, the first particles are primarily distributed within and coated with the binder and the second particles are primarily distributed on the exposed surface; andwherein the hydrophobic coating has a greater number of second particles on the exposed surface than on the surface in contact with the substrate. 2. The method of claim 1, wherein the binder comprises a polyurethane, lacquer, fluoropolymer, epoxy or thermoplastic powder coating. 3. The method of claim 2, wherein the binder comprises a polyurethane. 4. The method of claim 2, wherein the binder comprises a lacquer. 5. The method of claim 2, wherein the binder comprises a fluoropolymer or an epoxy. 6. The method of claim 1, wherein said first particles comprise a material selected from the group consisting of: cellulose, glass, metal oxides, metalloid oxides, plastics, carbides, nitrides, borides, spinels, diamond, fibers, and thermoplastic. 7. The method of claim 1, wherein said second particles comprise: a metal oxide, an oxide of a metalloid, a silicate, or a glass. 8. The method of claim 1, wherein said second particles comprise one or more alkyl, fluoroalkyl or perfluoroalkyl moieties that are covalently bound to the second particles directly or indirectly through one or more atoms bound to the second particles. 9. The method of claim 1, wherein, prior to the application of the second particles to the base coating, said second particles have been modified with an agent selected from the group consisting of: (tridecafluoro-1,1,2,2-tetrahydrooctyl)silane; (tridecafluoro-1,1,2,2-tetrahydrooctyl) trichlorosilane; (tridecafluoro-1,1,2,2-tetrahydrooctyl)triethoxysilane; (tridecafluoro-1,1,2,2-tetrahydrooctyl)trimethoxysilane; (heptadecafluoro-1,1,2,2-tetrahydrodecyl)dimethyl(dimethylamino)silane; (heptadecafluoro-1,1,2,2-tetrahydrodecyl)tris(dimethylamino)silane; n-octadecyltrimethoxysilane; n-octyltriethoxysilane; nonafluorohexyldimethyl(dimethylamino)silane; and polydimethylsiloxane; and wherein, following the modification, the second particles comprise at least one moiety selected from the group consisting of alkyl, haloalkyl, and perfluoroalkyl. 10. The method of claim 1, wherein the hydrophobic coating has an arithmetical mean roughness from about 0.2 microns to about 20 microns. 11. The method of claim 1, wherein said hydrophobic coating retains its hydrophobicity when subject to at least 200 abrasion cycles, as measured with a Taber Abrasion tester model 503 using CS-10 wheels and 250 g loads, wherein a surface is no longer considered to retain its hydrophobicity when more than half of the water droplets placed on the abraded surface are retained on the abraded surface when the abraded surface is inclined at an angle of 6°. 12. The method of claim 1, wherein said hydrophobic coating retains its hydrophobicity when subject to at least 100 abrasion cycles, as measured with a Taber Abrasion tester model 503 using CS-10 wheels and 250 g loads, wherein a surface is no longer considered to retain its hydrophobicity when more than half of the water droplets placed on the abraded surface are retained on the abraded surface when the abraded surface is inclined at an angle of 6°. 13. The method of claim 1, wherein the composition at step (b) further comprises a solvent. 14. The method of claim 1, wherein the second particles comprise silica or alumina. 15. The method of claim 1, wherein the hydrophobic coating has a contact angle with water that is greater than about 130° at a temperature of 18° C. to 23° C. 16. The method of claim 1, wherein said second particles that comprise one or more covalently bound moieties independently selected from the group consisting of alkyl, haloalkyl, and perfluoroalkyl moieties are second particles that have been modified with a silanizing agent of formula (I): R4-nSi—Xn (I)where n is an integer from 1 to 3;each R is an independently selected —Z—((CF2)q(CF3))r group, wherein Z is a C1-12 divalent alkane, q is an integer from 1 to 12, and r is an integer from 1-4;each X is independently selected from the group consisting of —H, —Cl, —I, —Br, —OH, —OR2, —NHR3, and —N(R3)2;each R2 is an independently selected C1 to 4 alkyl or haloalkyl group; andeach R3 is an independently selected H, C1 to 4 alkyl or haloalkyl group. 17. The method of claim 1, wherein said second particles have a size of about 1 nanometer to 25 microns. 18. The method of claim 1, wherein the binder comprises an acrylic lacquer.
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이 특허에 인용된 특허 (348)
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