Waterproofing membrane with a solid filler component
A membrane used in waterproofing and roofing applications, the membrane comprising a barrier layer comprising a thermoplastic polymer component and a contact layer bonded to at least portion of the barrier layer, the contact layer comprising a mixture of a solid filler component and a thermoplastic polymer component. The disclosure is also directed to a method for producing the membrane, a method for waterproofing a substrate, a waterproofed construction, a method for sealing a substrate against water penetration, and a sealed construction for sealing a substrate against water penetration.
1. A membrane comprising
a barrier layer S 1 having a first and a second opposing surface and
a contact layer S 2 having a first and a second opposing surface,
wherein
at least a portion of the first surface of the barrier layer S 1 and the second surface of the contact layer S 2 are directly bonded to each other,
the barrier layer S 1 has a thickness that is in a range of 0.1-10.0 mm,
the barrier layer S 1 comprises a thermoplastic polymer component P 1 ,
the contact layer S 2 comprises a mixture including a solid filler component F and a thermoplastic polymer component P 2 consisting of:
(i) a first ethylene-vinyl acetate co-polymer having a content of vinyl acetate unit in a range of 18.0-30 wt.-%,
(ii) a second ethylene-vinyl acetate co-polymer having a content of vinyl acetate unit in a range of 70.0-90.0 wt.-%, and
(iii) optional additives, and
the amount of the solid filler component F is in a range of 10.0-90.0 wt.-%, based on the total weight of the contact layer S 2 .
2. The membrane according to claim 1 , wherein the contact layer S 2 comprises not more than 2.5 wt.-% of hydrated mineral binders, based on the total weight of the contact layer S 2 .
3. The membrane according to claim 1 , wherein the thermoplastic polymer component P 2 has a melting point that is in a range of 25-250° C., as determined according to ISO 11357.
4. The membrane according to claim 1 , wherein the amount of the solid filler component F is in a range of 15.0-80.0 wt.-%, based on the total weight of the contact layer S 2 .
5. The membrane according to claim 1 , wherein the membrane has a concrete adhesion strength that is at least 10 N/50 mm, determined by a method comprising peeling the membrane from a surface of a concrete specimen at a peeling angle of 90° using a material testing apparatus equipped with a peeling device or a testing apparatus fulfilling requirements of DIN EN 1372 standard.
6. The membrane according to claim 5 , wherein the concrete adhesion strength is in a range of 10 N/50 mm to 400 N/50 mm.
7. The membrane according to claim 1 , wherein the solid filler component F is selected from the group consisting of organic fillers, inert mineral fillers, mineral binders, and mixtures thereof.
8. The membrane according to claim 1 , wherein the solid filler component F comprises at least one mineral binder selected from the group consisting of hydraulic binders, non-hydraulic binders, latent hydraulic binders, and pozzolanic binders, and mixtures thereof.
9. The membrane according to claim 1 , wherein the solid filler component F comprises hydraulic binders.
10. The membrane according to claim 1 , wherein the amount of the thermoplastic polymer component P 2 is in a range of 10.0-90.0 wt.-%, based on the total weight of the contact layer S 2 .
11. The membrane according to claim 1 , wherein the thermoplastic polymer component P 1 is miscible with the thermoplastic polymer component P 2 .
12. The membrane according to claim 1 , wherein the contact layer S 2 has a thickness that is in a range of 0.1-50.0 mm.
13. The membrane according to claim 1 , wherein the contact layer S 2 has a mass per unit area that is in a range of 100-10000 g/m 2 .
14. The membrane according to claim 1 , wherein the barrier layer S 1 is configured to be waterproof.
15. The membrane according to claim 1 , further comprising a second contact layer S 2 ′ having a first surface and a second opposing surface,
wherein
at least a portion of the second surface of the barrier layer S 1 and the first surface of the contact layer S 2 ′ are directly bonded to each other, and
the second contact layer S 2 ′ comprises a mixture of a solid filler component F′ and a thermoplastic polymer component P 2 ′.
16. The membrane according to claim 1 , wherein the contact layer S 2 has a shear modulus at a temperature of 30° C. measured according to EN ISO 6721-2:2008 of less than 600 MPa.
17. A waterproofed construction comprising a layer of concrete and the membrane according to claim 1 arranged between a surface of a substrate and the layer of concrete such that the second surface of the barrier layer S 1 is directed against the surface of the substrate and the first surface of the contact layer S 2 is fully bonded to the layer of concrete.
18. A sealed construction comprising the membrane according to claim 1 and a layer of adhesive arranged between a surface of a substrate and the membrane such that the first surface of the contact layer S 2 is bonded to the surface of the substrate with the layer of adhesive.
19. A method for producing the membrane according to claim 1 comprising extruding and/or calendering and/or co-extruding a homogenized melt comprising
the thermoplastic polymer component P 1 of the barrier layer S 1 , and
a homogenized melt comprising the mixture of the contact layer S 2 .
20. A method for waterproofing a substrate, the method comprising
applying the membrane according to claim 1 to a surface of a substrate such that the second surface of the barrier layer S 1 is directed against the surface of the substrate, casting a fresh cementitious composition on the first surface of the contact layer S 2 , and
hardening the fresh cementitious composition.
21. A method for sealing a substrate against water penetration, the method comprising
applying a layer of adhesive on the surface of the substrate,
covering the layer of the adhesive with the membrane according to claim 1 such that the first surface of the contact layer S 2 is brought in contact with the layer of adhesive, and
hardening the layer of adhesive.