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US 2019/0315973 A1Published application
Flexible Superhydrophobic and/or Oleophobic Polyurethane Coatings
AssigneeRoss Technology Corporation
InventorMichael F. Hurley
Life of this patent
Estimating the term…
Abstract
This disclosure deals with novel formulations to create highly durable flexible hydrophobic, superhydrophobic, oleophobic and/or superoleophobic surfaces. The formulations of this invention can be applied by dip, spray and painting processes.
Claims24
-38. (canceled)
A system for forming a hydrophobic coating comprising a first polyurethane forming composition and a second composition:
- wherein the first polyurethane forming composition, which is uncured, comprises
- i) one or more polyisocyanates and one or more polyester polyalcohols that react to form a polyurethane, wherein said one or more polyalcohols each have a molecular weight from about 150 to about 10,000 Daltons and an average molar hydroxyl functionality from about 2.0 to about 2.5,
- ii) about 2% to about 20% by weight of one or more independently selected first particles having a size of about 30 μm to about 225 μm, and
- iii) one or more independently selected solvents;
- and
- wherein the second composition, which is uncured, comprises
- i) one or more independently selected second particles having a size of about 1 nm to about 25 μm, wherein said second particles comprise one or more independently selected hydrophobic and/or oleophobic moieties bound, either directly or indirectly, to said second particles, and
- ii) one or more independently selected solvents, wherein said second particles are present in a weight percent range selected from 0.1-5.0, based on the weight of the one or more solvents and second particles;
- wherein the polyisocyanates and the polyester polyalcohols are provided as two or more components that are mixed to form the first polyurethane forming composition, and
- wherein the two or more components that are mixed to form the first polyurethane forming composition are provided separated from the second composition.
7 more elements
A system for forming a hydrophobic coating comprising a first polyurethane forming composition and a second composition:
- wherein the first polyurethane forming composition, which is uncured, comprises
- i) one or more polyisocyanates and one or more polyester polyalcohols that react to form a polyurethane, wherein said one or more polyalcohols have a molecular weight from about 150 to about 10,000 Daltons and an average molar hydroxyl functionality from about 2.0 to about 2.5,
- ii) about 2% to about 20% by weight of one or more independently selected first particles having a size of about 30 μm to about 225 μm, and
- iii) optionally comprises one or more independently selected solvents;
- and
- wherein the second composition, which is uncured, comprises per 100 parts by weight
- i) 0.1 to 3.5 parts by weight of one or more independently selected second particles having a size of about 1 nm to about 25 μm, wherein said second particles comprise one or more independently selected hydrophobic or oleophobic moieties bound, either directly or indirectly, to said second particles, or one or more siloxanes or silazanes associated with said second particles,
- ii) 0.1 to 1.0 parts by weight of a fluorinated polyolefin;
- and/or
- 0.06 to 0.6 parts by weight of a fluoroethylene-alkyl vinyl ether (FEVE) copolymer, having an average molecular weight of about 1,000 to about 3,000 Daltons, and
- iii) one or more independently selected solvents for the remainder of a total of 100 parts by weight;
- wherein the polyisocyanates and the polyester polyalcohols are provided as two or more components that are mixed to form the first polyurethane forming composition, and
- wherein the two or more components that are mixed to form the first polyurethane forming composition are provided separated from the second composition.
10 more elements
A method of forming a hydrophobic coating on all or a portion of the surface of an object comprising the steps:
- (a) optionally applying or treating the surface with a primer to form a primed surface,
- (b) forming a base coat by applying an uncured first polyurethane forming composition comprising
- i) one or more polyisocyanates and one or more polyester polyalcohols that react to form a polyurethane, wherein said one or more polyalcohols have a molecular weight from about 150 to about 10,000 Daltons and an average molar hydroxyl functionality from about 2.0 to about 2.5,
- ii) about 2% to about 20% by weight of one or more independently selected first particles having a size of about 30 μm to about 225 μm, and
- iii) optionally comprises one or more independently selected solvents
- to at least a portion of said surface, or to at least a portion of said primed surface;
- and
- (c) applying an uncured second composition comprising
- i) 0.1 to 3.5 parts by weight of one or more independently selected second particles having a size of about 1 nm to about 25 μm, wherein said second particles comprise one or more independently selected hydrophobic or oleophobic moieties bound, either directly or indirectly, to said second particles, or one or more siloxanes or silazanes associated with said second particles,
- ii) 0.1 to 1.0 parts by weight of a fluorinated polyolefin;
- and/or
- 0.06 to 0.6 parts by weight of a fluoroethylene-alkyl vinyl ether (FEVE) copolymer, having an average molecular weight of about 1,000 to about 3,000 Daltons, and
- iii) one or more independently selected solvents for the remainder of a total of 100 parts by weight
- to all or a portion of the base coat to form said coating,
- wherein said coating has either hydrophobic or superhydrophobic properties, and optionally is also oleophobic or superoleophobic,
- wherein the polyisocyanates and the polyester polyalcohols are provided as two or more components that are mixed to form the first polyurethane forming composition, and
- wherein the two or more components that are mixed to form the first polyurethane forming composition are provided separated from the second composition.
14 more elements
A system for forming a coating comprising:
- a first polyurethane forming composition, which is uncured, and a second composition, which is uncured;
- wherein the first polyurethane forming composition
- i) comprises one or more polyisocyanates and one or more polyamides, and/or polyacrylate polyalcohol polymers that react to form a polyurethane, wherein said one or more polyalcohol polymers have a molecular weight from about 150 to about 10,000 Daltons and an average molar hydroxyl functionality from about 2.0 to about 2.5,
- ii) optionally comprises one or more independently selected first particles having a size of about 30 μm to about 225 μm, wherein, when said first particles are present, the first polyurethane forming composition comprises from about 5% to about 20% of said first particles by weight, and
- iii) optionally comprises one or more independently selected solvents;
- and
- wherein the second composition comprises per 100 parts by weight
- i) 0.1 to 3.5 parts by weight of one or more independently selected second particles having a size of about 1 nm to about 25 μm, wherein said second particles comprise one or more independently selected hydrophobic or oleophobic moieties bound, either directly or indirectly, to said second particles, or one or more siloxanes or silazanes associated with said second particles,
- ii) 0.1 to 1.0 parts by weight of a fluorinated polyolefin;
- and/or
- 0.06 to 0.6 parts by weight of a fluoroethylene-alkyl vinyl ether (FEVE) copolymer, having an average molecular weight of about 1,000 to about 3,000 Daltons, and
- iii) one or more independently selected solvents for the remainder of a total of 100 parts by weight,
- wherein the polyisocyanates and the polyester polyalcohols are provided as two or more components that are mixed to form the first polyurethane forming composition, and
- wherein the two or more components that are mixed to form the first polyurethane forming composition are provided separated from the second composition.
11 more elements
A polyurethane forming composition comprising:
- i) one or more polyisocyanates and one or more polyester polyalcohols that react to form a polyurethane, wherein the one or more polyalcohols have a molecular weight from about 150 to about 10,000 Daltons and an average molar hydroxyl functionality from about 2.0 to about 2.5;
- and
- ii) about 2% to about 20% by weight of one or more independently selected particles having a size of about 30 μm to about 225 μm;
- and
- wherein the polyurethane forming composition optionally comprises one or more independently selected solvents.
2 more elements
A composition comprising per 100 parts by weight of:
- i) 0.1 to 3.5 parts by weight of one or more independently selected particles having a size of about 1 nm to about 25 μm, wherein the particles comprise one or more independently selected hydrophobic or oleophobic moieties bound, either directly or indirectly, to the particles, or one or more siloxanes or silazanes associated with the particles;
- ii) 0.1 to 1.0 parts by weight of a fluorinated polyolefin,
- and/or
- 0.06 to 0.6 parts by weight of a fluoroethylene-alkyl vinyl ether (FEVE) copolymer, having an average molecular weight of about 1,000 to about 3,000 Daltons;
- and
- iii) one or more independently selected solvents for the remainder of a total of 100 parts by weight.
3 more elements
Dependencies are inferred from the claim text.