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US 8,075,669 B2Granted
Composite material
AssigneeGore Enterprise Holdings, Inc.
InventorsKlaus Meindl, Wolfgang Buerger
Life of this patent
Estimating the term…
Abstract
There is described a composite material such as venting materials and vents containing said venting materials. The vents are air- or more generally gas-permeable venting composites that are oleophobic and liquid repellent.
Claims29
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a perfluoropolyether (PFPE), said PFPE comprising the following end-groups:
- —(O)n—(CR1R2)m—CR3R4R5
- wherein:
- R1=H, F, Cl, Br or I;
- R2=H, F, Cl, Br or I;
- R3=H, F, Cl, Br or I;
- R4=H, F, Cl, Br or I;
- R5=H, F, Cl, Br, I, alkyl or aryl;
- n=0 or 1;
- and
- =0-10,
- wherein the weight ratio between the first and the second component in the formed coating is within the range of 1 weight part of the first component to 0.01-100 weight parts of the second component.
14 more elements
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a block copolymer, said block-copolymer comprising a PFPE backbone.
3 more elements
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a perfluoropolyether (PFPE), said PFPE comprising the following end-groups:
- —(O)n—(CR1R2)m—CR3R4R5
- wherein:
- R1=H, F, Cl, Br or I;
- R2=H, F, Cl, Br or I;
- R3=H, F, Cl, Br or I;
- R4=H, F, Cl, Br or I;
- R5=H, F, Cl, Br, I, alkyl or aryl;
- n=0 or 1;
- and
- m=0-10,
- wherein the gas-permeable composite has an air flow recovery greater than 5% in the air flow recovery test after contact with a water based liquid at 25° C. and a liquid contact time of 5 sec and a waiting time of 5 min, with the liquid being composed of 3 wt. % polyvinylpyrrolidone, 3 wt. % silicone surfactant, and 94 wt. % deionised water, and the liquid having a surface tension of 23 mN/m and a viscosity of 13.7 mPa·s measured at a shear rate of 50 sec−1.
14 more elements
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a block copolymer, said block-copolymer comprising a PFPE backbone,
- wherein the gas-permeable composite has an air flow recovery greater than 5% in the air flow recovery test after contact with a water based liquid at 25° C. and a liquid contact time of 5 sec and a waiting time of 5 min, with the liquid being composed of 3 wt. % polyvinylpyrrolidone, 3 wt. % silicone surfactant, and 94 wt. % deionised water, and the liquid having a surface tension of 23 mN/m and a viscosity of 13.7 mPa·s measured at a shear rate of 50 sec−1.
4 more elements
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus including a porous gas-permeable venting composite comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprises an oleophobic and hydrophobic compound selected from the groups of fluorinated or perfluorinated esters in oligomeric or polymeric form, and tetrafluoroethylene co- or ter-polymers;
- and
- (e) said second component comprising a perfluoropolyether (PFPE) selected from at least one of the following and combinations thereof:
- CF3—[(OCF(CF3)CF2)m—(OCF2)n—]OCF3
- where m+n=8 to 1000 and
- m/n=20 to 1000;
- CF3—[(OCF2CF2)m—(OCF2)n]OCF3
- where m+n=40 to 1000 and
- m/n=0.5 to 2;
- CF3CF2CF2O—(CF(CF3)CF2O)n—CF2OF3
- where n=10 to 1000;
- and
- CF3CF2CF2O—(CF2CF2CF2O)n—CF2CF3,
- where n=10 to 1000.
14 more elements
A venting apparatus having an opening for venting gas from an enclosure or receptacle, said venting apparatus comprising:
- a porous gas-permeable composite venting element located within, outside or on said venting apparatus and forming a liquid-tight seal for said opening, said porous gas-permeable composite venting element comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating is porous and gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a perfluoropolyether (PFPE), comprising the following end-groups:
- —(O)n—(CR1R2)m—CR3R4R5
- wherein:
- R1=H, F, Cl, Br or I;
- R2=H, F, Cl, Br or I;
- R3=H, F, Cl, Br or I;
- R4=H, F, Cl, Br or
- R5=H, F, Cl, Br, I, alkyl or aryl;
- n=0 or 1;
- and
- m=0-10.
14 more elements
A method of venting gas from an enclosure or receptacle, said method comprising:
- providing a porous gas-permeable composite venting element within, outside or on a venting apparatus and forming a liquid-tight seal for an opening on said venting apparatus, said porous gas-permeable composite venting element comprising:
- (a) a porous polymeric structure having a structure defining a plurality of pores extending therethrough and with at least one outer surface;
- (b) a coating covering at least a portion of said outer surface of the porous polymeric structure, wherein the porous polymeric structure with the coating has pores and is gas-permeable;
- (c) said coating comprising at least a first and a second component;
- (d) said first component comprising oleophobic and hydrophobic fluorinated material;
- and
- (e) said second component comprising a perfluoropolyether (PFPE), said PFPE comprising the following end-groups:
- —(O)n—(CR1R2)m—CR3R4R5
- wherein:
- R1=H, F, Cl, Br or I;
- R2=H, F, Cl, Br or I;
- R3=H, F, Cl, Br or I;
- R4=H, F, Cl, Br or I;
- R5=H, F, Cl, Br, I, alkyl or aryl;
- n=0 or 1;
- and
- m=0-10.
14 more elements
Dependencies are inferred from the claim text.