Composition and coating for hydrophobic performance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09D-133/10
C09D-007/12
B05D-001/06
C09D-005/02
C09D-005/16
C08K-005/07
C08K-005/10
C08K-009/06
출원번호
US-0305425
(2014-06-16)
등록번호
US-9139744
(2015-09-22)
발명자
/ 주소
Sikka, Vinod K.
Hurley, Michael
Lim, Zenas W.
출원인 / 주소
Ross Technology Corporation
대리인 / 주소
Perkins Coie LLP
인용정보
피인용 횟수 :
7인용 특허 :
340
초록▼
The present disclosure describes compositions comprising an acrylic polymer binder and nano-particles less than about 100 nm that provide a hydrophobic or superhydrophobic coating that may also display oleophobicity. The coating composition may advantageously be prepared using VOC exempt compounds t
The present disclosure describes compositions comprising an acrylic polymer binder and nano-particles less than about 100 nm that provide a hydrophobic or superhydrophobic coating that may also display oleophobicity. The coating composition may advantageously be prepared using VOC exempt compounds that are compatible with a variety of surface materials including many electronic components. In addition, the coating composition may also be rapidly dried rendering it useful for the rapid preparation of coated objects and surfaces in manufacturing/assembly line environments.
대표청구항▼
1. A coating composition giving rise to a hydrophobic coating, the coating composition comprising: an acrylic binder, nano-particles from about 8 nm to about 100 nm associated covalently or non-covalently with alkyl or fluoroalkyl groups, and a solvent, where the solvent comprises a compound selecte
1. A coating composition giving rise to a hydrophobic coating, the coating composition comprising: an acrylic binder, nano-particles from about 8 nm to about 100 nm associated covalently or non-covalently with alkyl or fluoroalkyl groups, and a solvent, where the solvent comprises a compound selected from the group consisting of acetone, t-butylacetate and/or combinations thereof; wherein the acrylic binder comprises: a MMA polymer or copolymer; a BMA polymer or copolymer; an EMA polymer or copolymer; a MMA/BMA copolymer; a MMA/EMA copolymer; or a BMA/EMA copolymer; andwherein when the composition is applied at a rate of 1 liter per 2.5 square meters, such application being divided into a series of five spray applications, each such spray application comprising one-fifth (0.2 liters) of the total composition, the composition dries within sixty seconds following each spray to form a coating that does not transfer to, or stick to, a surface brought in contact with the hydrophobic coating, if the solvent in the composition is allowed to freely evaporate in the absence of heating or forced air circulation. 2. The composition of claim 1, wherein the nano-particles comprise silica, fumed silica, titanium dioxide or alumina. 3. The composition of claim 2, wherein the nano-particles are treated with a polydimethylsiloxane, a silanizing agent, or a combination thereof. 4. The composition of claim 1, wherein the composition provides a hydrophobic and/or oleophobic coating that resists a loss in hydrophobicity when subject to abrasion greater than 2 cycles using a Taber Abraser equipped with CS10 wheels under a 250 g load and operated at 95 RPM at about 20° C. in less than about one hour. 5. A spray coating apparatus comprising a can or canister containing a composition of claim 1, wherein said apparatus produces an aerosol or spray of said composition for spray application of said coating. 6. A hydrophobic coating prepared by applying the composition of claim 1 to all or part of the surface of an object. 7. A method of coating a surface, or a portion thereof, comprising applying a composition of claim 1. 8. A method of coating a surface, or a portion thereof, comprising applying an aerosol or spray of said composition with an apparatus according to claim 5. 9. The composition of claim 1, wherein the acrylic binder comprises a MMA polymer and/or MMA copolymer. 10. The composition of claim 1, wherein the acrylic binder comprises a MMA polymer and/or BMA copolymer. 11. The composition of claim 1, wherein the acrylic binder comprises an EMA copolymer. 12. A hydrophobic coating prepared by the application of a composition according to claim 1 to all or part of the surface of an object, wherein the coating is also oleophobic. 13. A method of preparing a hydrophobic and/or oleophobic coating or surface, comprising applying a composition according to claim 1 to the surface of an object or a part of the surface of an object. 14. A coating according to claim 6, wherein the coating is superhydrophobic. 15. A coating according to claim 14, wherein said coating has a hardness of at least 9B using the ASTM D3363-05(2011)e2 Standard Test Method for Film Hardness by Pencil Test. 16. A coating according to claim 15, that retains its superhydrophobicity for at least 2 cycles (revolutions) of a Taber Abraser using CS10 wheels with a 250 g load at 95 rpm at about 20° C. and/or 14 strokes on a Crockmeter operated with a 9 Newton load at about 20° C., where loss of superhydrophobic behavior is deemed to be the point at which more than half of the water droplets applied to a substantially planar test surface run off when the surface is inclined at 5 degrees from horizontal. 17. A coating according to claim 12, wherein the coating is superhydrophobic. 18. A coating according to claim 12, wherein said coating has a hardness of at least 9B using the ASTM D3363-05(2011)e2 Standard Test Method for Film Hardness by Pencil Test. 19. A coating according to claim 1, wherein said coating has a hardness of at least 9B using the ASTM D3363-05(2011)e2 Standard Test Method for Film Hardness by Pencil Test. 20. The coating of claim 6, wherein said nano-particles comprise fumed silica, fumed alumina or fumed TiO2 covalently bound to the alkyl or fluoroalkyl groups and said object is an electronic device, electronic circuitry or a circuit board. 21. The coating of claim 12, wherein said nano-particles comprise fumed silica, fumed alumina or fumed TiO2 covalently bound to the alkyl or fluoroalkyl groups and said object is an electronic device, electronic circuitry or a circuit board. 22. The coating of claim 14, wherein said nano-particles comprise fumed silica, fumed alumina or fumed TiO2 covalently bound to the alkyl or fluoroalkyl groups and said object is an electronic device, electronic circuitry or a circuit board.
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이 특허에 인용된 특허 (340)
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