Plunger and methods of producing hydrophobic surfaces
First Claim
Patent Images
1. A method of forming a hydrophobic coating on at least a portion of a surface comprising the steps:
- i) applying a composition comprising water, a polymeric binder that can be diluted with water, and first particles on said at least a portion of a surface, wherein said first particles have a size of about 30 μ
m to about 225 μ
m; and
ii) applying second particles having a size of about 1 nm to about 25 μ
m to said polymeric binder on said at least a portion of said surface;
wherein said applying second particles to said polymeric binder comprises applying either a liquid composition comprising said second particles or a spray coating of said second particles, using a stream of gas wherein the second particles comprise less than 2% by weight of a solvent; and
wherein the second particles, or the first particles and second particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound to said first or second particles through a silicon atom independently selected from;
(a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or(b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4.
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Accused Products
Abstract
Highly durable hydrophobic and/or oleophobic coatings and methods and compositions for their production are described herein. Also described herein is a plunger having a hydrophobic surface prepared using the coating compositions described herein.
671 Citations
28 Claims
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1. A method of forming a hydrophobic coating on at least a portion of a surface comprising the steps:
-
i) applying a composition comprising water, a polymeric binder that can be diluted with water, and first particles on said at least a portion of a surface, wherein said first particles have a size of about 30 μ
m to about 225 μ
m; andii) applying second particles having a size of about 1 nm to about 25 μ
m to said polymeric binder on said at least a portion of said surface;
wherein said applying second particles to said polymeric binder comprises applying either a liquid composition comprising said second particles or a spray coating of said second particles, using a stream of gas wherein the second particles comprise less than 2% by weight of a solvent; andwherein the second particles, or the first particles and second particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound to said first or second particles through a silicon atom independently selected from; (a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4.
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2. A method of forming a hydrophobic coating on at least a portion of a surface comprising applying a composition comprising water, a polymeric binder that can be diluted with water, first particles having a size of about 30 μ
- m to about 225 μ
m, and hydrophobic second particles having a size of about 1 nm to about 25 μ
m on said at least a portion of a surface,wherein said second particles, or said first particles and second particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound to said first or second particles through a silicon atom independently selected from; (a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4.
- m to about 225 μ
-
3. A system for preparing a hydrophobic coating comprising as two separate components:
-
i) a first component comprising water, a polymeric binder that can be diluted with water, and first particles, wherein said first particles have a size from about 30 μ
m to about 225 μ
m; andii) a second component comprising hydrophobic second particles having a size of about 1 nm to about 25 μ
m;wherein said second particles, or said first particles and second particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound to said first or second particles through a silicon atom independently selected from; (a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4.- View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
ii) applying to the binder on at least a portion of the surface the second component comprising second particles;
wherein the resulting coating has a greater amount of second particles on, at, or adjacent to the exposed surface than on, at, or adjacent to the surface of the article.
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5. The system of claim 3, wherein the binder comprises a polyurethane, lacquer, fluoropolymer, or epoxy coating composition.
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6. The system of claim 5, wherein the binder comprises a polyurethane or epoxy coating composition.
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7. The system of claim 3, wherein said second particles, but not said first particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound.
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8. The system of claim 3, wherein said second particles have an average size in a range selected from about 1 nm to about 100 nm, about 100 nm to about 1 micron, about 1.0 micron to about 10 μ
- m, and about 2.5 micron to about 25 μ
m.
- m, and about 2.5 micron to about 25 μ
-
9. The system of claim 3, wherein said second particles comprise:
- a metal oxide, an oxide of a metalloid, a silicate, or a glass.
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10. A hydrophobic coating prepared by (i) applying the first component of the system of claim 3 to at least a portion of a surface, and (ii) applying the second component of the system of claim 3 to at least a portion of the surface coated by the first component,
wherein the coating is resistant to 40 abrasion cycles on a Taber Model 503 instrument using CS-10 wheels with 250 g load without loss of hydrophobicity.
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11. A coating composition comprising:
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
m to about 225 μ
m, and hydrophobic second particles having a size of about 1 nm to about 25 μ
m,wherein said second particles, or said first particles and second particles, comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties covalently bound to said first or second particles through a silicon atom, wherein said hydrophobic and/or oleophobic moieties are independently selected from; (a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
-
19. A system for preparing a hydrophobic coating comprising as two separate components:
-
i) a first component comprising water, a polymeric binder that can be diluted with water, and first particles, wherein said first particles have a size from about 30 μ
m to about 225 μ
m; andii) a second component comprising hydrophobic second particles having a size of about 1 nm to about 25 μ
m;wherein said second particles comprise one or more independently selected fluoroalkyl or perfluoroalkyl moieties covalently bound to the second particles through a silicon atom. - View Dependent Claims (20, 21)
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22. A system for preparing a hydrophobic coating comprising as two separate components:
-
i) a first component comprising water, a polymeric binder that can be diluted with water, and first particles, wherein said first particles have a size from about 30 μ
m to about 225 μ
m, and wherein said first particles do not comprise a hydrophobic moiety; andii) a second component comprising hydrophobic second particles having a size of about 1 nm to about 25 μ
m;wherein said second particles comprise one or more independently selected hydrophobic, or hydrophobic and oleophobic, moieties.
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23. A coating composition comprising:
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
m to about 225 μ
m, and hydrophobic second particles having a size of about 1 nm to about 25 μ
m,wherein said second particles, or said first particles and second particles, comprise one or more independently selected hydrophobic and/or oleophobic moieties covalently bound to said first or second particles through a silicon atom, wherein said hydrophobic and/or oleophobic moieties are independently selected from; (a) C1 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4; andwherein said first particles are hollow microspheres. - View Dependent Claims (24, 25)
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
-
26. A coating composition comprising:
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
m to about 225 μ
m, and hydrophobic second particles having a size of about 1 nm to about 25 μ
m,wherein said second particles, or said first particles and second particles, comprise one or more independently selected hydrophobic and/or oleophobic moieties covalently bound to said first or second particles through a silicon atom, wherein said hydrophobic and/or oleophobic moieties are independently selected from; (a) C1 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4; andwherein said one or more hydrophobic, or hydrophobic and oleophobic, moieties comprise one or more independently selected fluoroalkyl or perfluoroalkyl moieties.
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
-
27. A coating composition for preparing a hydrophobic coating comprising:
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
m to about 225 μ
m, and hydrophobic second particles having a size of about 1 nm to about 25 μ
m,wherein said first particles do not comprise a hydrophobic moiety wherein, upon curing the coating formed from the coating composition is hydrophobic with a contact angle greater than 90°
with water at 23°
C., andwherein the second particles comprise one or more independently selected hydrophobic moieties covalently bound to said first or second particles through a silicon atom independently selected from; (a) C6 to 20 alkyl or cycloalkyl, either or both of which are optionally substituted with one or more fluorine atoms, or (b) —
Z—
((CF2)q(CF3))r, wherein Z is a C1 to 12 alkyl group, and where q is an integer from 1 to 12, and r is an integer from 1-4. - View Dependent Claims (28)
- water, a polymeric binder that can be diluted with water, first particles having a size from about 30 μ
Specification