Fluorine-free hydrophobic permeable material
AssigneeDonaldson Company, Inc.
InventorsStephen K. Sontag, Mikayla A. Yoder, Matthew P. Goertz, Davis B. Moravec
Life of this patent
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Abstract
An article includes a permeable material having a surface; and a hydrophobic coating on the surface forming a hydrophobic surface, the hydrophobic coating being free of fluorine, and the hydrophobic surface having a water-contact angle of 95 degrees or greater. The article may be a vent. A method of making the hydrophobic article includes applying a hydrophobic material onto a permeable material; and curing the hydrophobic material to form a hydrophobic surface. The hydrophobic coating may include siloxane.
Claims23
1-31. (canceled)
An article comprising:
- a phase-inverted permeable material having a surface;
- and
- a fluorine-free hydrophobic coating on the surface forming a hydrophobic surface, the hydrophobic surface having a water-contact angle of 95 degrees to 115 degrees;
- and
- the coating exhibiting a wetted fraction of 0.96 or smaller in contact with a liquid having a surface tension of 35 mN/m or greater.
A vent comprising:
- a phase-inverted permeable material having a surface;
- and
- a fluorine-free hydrophobic coating on the surface forming a hydrophobic surface, the hydrophobic surface having a water-contact angle of 95 degrees to 115 degrees;
- and
- the hydrophobic surface exhibiting a wetted fraction of 0.96 or smaller in contact with a liquid having a surface tension of 35 mN/m or greater.
A method of making a hydrophobic article, the method comprising:
- applying a hydrophobic material onto a phase-inverted permeable material;
- and
- curing the hydrophobic material to form a hydrophobic surface,
- the hydrophobic material being free of fluorine, and the hydrophobic surface having a water-contact angle of 95 degrees or greater, and exhibiting a wetted fraction of 0.96 or smaller in contact with a liquid having a surface tension of 35 mN/m or greater.
Dependencies are inferred from the claim text.