초록 ▼

Oleophobic and hydrophobic filters for filter venting applications are made by forming a polydimethylsiloxane coating on the surface of a filtration substrate. The filters have high water penetration pressures and high air permeabilities. The coatings are formed by polymerizing vinyl terminated silo

Oleophobic and hydrophobic filters for filter venting applications are made by forming a polydimethylsiloxane coating on the surface of a filtration substrate. The filters have high water penetration pressures and high air permeabilities. The coatings are formed by polymerizing vinyl terminated siloxane with a crosslinker such as hydrosilicone in the presence of a catalyst. Alternatively, the coatings can be formed by heat curing after exposing the substrate to methyl silicone and crosslinking at high temperature.

대표청구항 ▼

1. A vent filter for a medical device, the vent filter comprising an oleophobic, hydrophobic, coated substrate, the substrate having a pressure of water penetration and an air permeability, the coated filter further comprising a coating derived from a coating formulation, wherein the coating is perm

1. A vent filter for a medical device, the vent filter comprising an oleophobic, hydrophobic, coated substrate, the substrate having a pressure of water penetration and an air permeability, the coated filter further comprising a coating derived from a coating formulation, wherein the coating is permanently crosslinked to the substrate, and wherein the coating formulation comprises a vinyl-terminated siloxane polymer, wherein the vent filter may be steam sterilized or chemically sterilized without substantial loss of air permeability.