Water-tight breathable membrane
The present invention relates to shaped bodies comprising a composition (Z1), wherein said composition comprises at least one polymer having an elongation at break of >30% and at least one porous metal-organic framework material, to processes for producing shaped bodies of this kind and to the use of a composition (Z1) comprising at least one polymer having an elongation at break of >30% and at least one porous metal-organic framework material for production of a film, membrane or laminate having a water vapor permeability according to DIN 53122 at 38° C./90% rel. humidity of greater than 1000 g/(m 2 *d), based on a film thickness of 10 μm.
1. A shaped body, comprising a composition (Z1), wherein said composition (Z1) comprises:
at least one polymer having an elongation at break of >30%, determined according to ISO 527-1; and
(ii) at least one porous metal-organic framework material,
wherein:
a portion of the porous metal-organic framework material in the composition (Z1) ranges from 0.1% to 10% by weight;
the porous metal-organic framework material has an average pore diameter in the range from 0.2 to 4 nm;
the porous metal-organic framework material comprises zinc, magnesium or aluminum as metal;
the polymer is selected from the group consisting of a thermoplastic polyurethane, a polyester, a polyether, a polyetherester, a polyketone, a polyethersulfone, a polysulfone, a polyetherimide, a polyamide and a polyolefin; and
wherein the shaped body is a film, membrane or laminate and the film, the membrane or the laminate has a thickness in the range from 80 to 500 μm.
2. The shaped body according to claim 1 , wherein the shaped body is a membrane.
3. The shaped body according to claim 1 , wherein the shaped body is obtained by an extrusion process.
4. A process for producing a shaped body, the process comprising producing a shaped body from a composition (Z1) by an extrusion method, an injection molding method, a casting method, a blowing method, a sintering method, or a lamination method,
wherein:
the composition (Z1) comprises:
(i) at least one polymer having an elongation at break of >30%, determined according to ISO 527-1, and
(ii) at least one porous metal-organic framework material;
a portion of the porous metal-organic framework material in the composition (Z1) ranges from 0.1% to 10% by weight;
the porous metal-organic framework material has an average pore diameter in the range from 0.2 to 4 nm;
the porous metal-organic framework material comprises zinc, magnesium or aluminum as metal;
the polymer is selected from the group consisting of a thermoplastic polyurethane, a polyester, a polyether, a polyetherester, a polyketone, a polyethersulfone, a polysulfone, a polyetherimide, a polyamide and a polyolefin; and
wherein the shaped body is a film, membrane or laminate and the film, the membrane or the laminate has a thickness in the range from 80 to 500 μm.
5. The process according to either of claim 4 , wherein the shaped body is produced by an extrusion method.
6. The shaped body according to claim 1 , wherein the film, the membrane or the laminate has a water vapor permeability according to DIN 53122 at 38° C. and 90% relative humidity of greater than 1000 g/(m 2 *d), based on a film thickness of 10 μm.
7. The shaped body according to claim 1 , wherein the film, the membrane or the laminate has a water vapor permeability according to DIN 53122 at 38° C. and 90% relative humidity of greater than 1000 g/(m 2 *d), based on a film thickness of 10 μm, and a watertightness of 0.2 bar, measured according to DIN EN 20811:1992.