Self-adhering sealing device with an adhesive sealant layer

Patent metadata

Field	Value
Publication number	US-11945983-B2
Application number	US-201915734426-A
Country	US
Kind code	B2
Filing date	Jul 12, 2019
Priority date	Jul 12, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

A sealing device includes a waterproofing membrane, an adhesive sealant layer, and optionally a release liner, wherein the adhesive sealant layer includes at least one elastomer, at least one at 25° C. liquid polyolefin resin, and at least one inert mineral filler. An adhesive sealant composition is used to form the adhesive sealant layer. The sealant device may be used to waterproof a substrate and provide a fully-adhered roof system. The adhesive sealant composition may be used to provide a self-healing roofing membrane.

First claim

The invention claimed is:

1. A sealing device comprising:
i. a waterproofing membrane having a first and a second primary exterior surface,
ii. an adhesive sealant layer covering at least portion of the second primary exterior surface of the waterproofing membrane, wherein the adhesive sealant layer is composed of a first composition comprising:
a) at least one elastomer,
b) at least one polyolefin resin that is liquid at 25° C., and
c) at least one inert mineral filler, and

wherein the adhesive sealant layer comprises less than 5 weight % of water swellable mineral fillers.

2. The sealing device according to claim 1 , wherein the at least one polyolefin resin is polyisobutylene, having an average molecular weight (M n ) of not more than 5,000 g/mol.

3. The sealing device according to claim 1 , wherein the adhesive sealant layer covers substantially the entire area of the second primary exterior surface of the waterproofing membrane.

4. The sealing device according to claim 1 , wherein the waterproofing membrane comprises a barrier layer having a first and a second major surface.

5. The sealing device according to claim 4 , wherein the barrier layer is composed of a second composition comprising at least one thermoplastic polymer selected from the group consisting of ethylene-vinyl acetate copolymer, ethylene-acrylic ester copolymers, ethylene-α-olefin copolymers, ethylene-propylene copolymers, propylene copolymers, polypropylene, polyethylene, polyvinylchloride, polyethylene terephthalate, polystyrene, polyamides, chlorosulfonated polyethylene, ethylene propylene diene rubber, and polyisobutylene.

6. The sealing device according to claim 5 , wherein the at least one thermoplastic polymer comprises at least one thermoplastic polyolefin.

7. The sealing device according to claim 1 , wherein the waterproofing membrane further comprises a layer of fiber material covering at least portion of the second major surface of the barrier layer and positioned between the barrier layer and the adhesive sealant layer.

8. The sealing device according to claim 7 , wherein the layer of fiber material is a non-woven fabric having a mass per unit area of 15-150 g/m 2 .

9. The sealing device according to claim 8 , wherein the non-woven fabric comprises at least one of synthetic organic and inorganic fibers.

10. The sealing device according to claim 1 , wherein the first composition further comprises at least one hydrocarbon resin, having at least one of a softening point measured by Ring and Ball method according to DIN EN 1238 in the range of 65-200° C., and a glass transition temperature determined by differential scanning calorimetry method according to ISO 11357 standard using a heating rate of 2° C/min of at or above 0° C.

11. The sealing device according to claim 1 , wherein the first composition comprises:
a) 1-30 wt.-% of the at least one elastomer selected from the group consisting of ethylene-propylene rubber, butyl rubber, synthetic 1,4-cis-polyisoprene, polybutadiene, styrene-butadiene copolymer, isoprene-butadiene copolymer, and styrene-isoprene-butadiene rubber,
b) 10-50 wt.-% of the at least one polyolefin resin, and
c) 5-60 wt.-% of the at least one inert mineral filler selected form the group consisting of sand, granite, calcium carbonate, clay, expanded clay, diatomaceous earth, pumice, mica, kaolin, talc, dolomite, xonotlite, perlite, vermiculite, Wollastonite, barite, magnesium carbonate, calcium hydroxide, calcium aluminates, silica, fumed silica, fused silica, aerogels, glass beads, hollow glass spheres, ceramic spheres, bauxite, comminuted concrete, and zeolites, all proportions being based on the total weight of the first composition.

12. The sealing device according to claim 1 , wherein the first composition further comprises at least one electrically conductive filler selected from the group consisting of carbon fibers, steel fibers, carbon black, carbon nanotubes, and graphite.

13. The sealing device according to claim 12 , wherein
(1) particles of the at least one electrically conductive filler are distributed throughout the entire volume of the adhesive sealant layer, or
(2) the at least one electrically conductive filler is present in the first composition in an amount of 0.5-15.0 wt.-%, based on the total weight of the first composition, or
(3) particles of the at least one electrically conductive filler are distributed throughout the entire volume of the adhesive sealant layer, and the at least one electrically conductive filler is present in the first composition in an amount of 0.5-15.0 wt.-%, based on the total weight of the first composition.

14. The sealing device according to claim 1 , wherein the adhesive sealant layer has a thickness determined by using the measurement method as defined in DIN EN 1849-2 standard of 0.1-5.0 mm.

15. A method for producing a sealing device according to claim 1 , the method comprising steps of:
i) providing a waterproofing membrane having a first and a second primary exterior surface as defined in claim 1 ,
ii) heating a first composition as defined in claim 1 to allow the composition to flow, and
iii) coating the heated composition onto the second primary exterior surface of the waterproofing membrane.

16. A method for waterproofing a substrate, the method comprising steps of:
i) providing one or more sealing devices according to claim 1 ,
ii) applying the sealing device(s) on a surface of the substrate to be waterproofed such that at least portion of the outer major surface of the adhesive sealant layer is directly contacted with surface of the substrate,
iii) pressing the sealing device(s) against the surface of the substrate with a pressure sufficient to affect adhesive bonding between the sealing device(s) and the substrate.

17. A fully-adhered roof system comprising a roof substrate and a sealing device according to claim 1 directly adhered to a surface of the roof substrate via the adhesive sealant layer.

18. The fully-adhered roof system according to claim 17 , wherein the roof substrate is selected from the group consisting of an insulation board, a cover board, and an existing roofing membrane.

19. A method for providing a self-healing roofing membrane comprising a waterproofing membrane having a first and a second primary exterior surface, the method comprising covering at least a portion of the second primary exterior surface of the waterproofing membrane with a layer of an adhesive sealant composition, wherein the adhesive sealant composition comprises:
a) at least one elastomer,
b) at least one polyolef in resin that is liquid at 25° C., and
c) at least one inert mineral filler, and
wherein the adhesive sealant layer comprises less than 5 weight % of water swellable mineral fillers.

20. The sealing device according to claim 1 , which includes:
iii. a release liner.

Assignees

• Sika Tech Ag

Inventors

• Ackermann Herbert
• Schönbrodt Simon
• Kerber Carine
• Roskamp Robert

Classifications

• C09J7/383 Primary

  Natural or synthetic rubber · CPC title

• B32B5/022

  Non-woven fabric · CPC title

• B32B27/12 Primary

  next to a fibrous or filamentary layer · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• E04B1/665

  Sheets or foils impervious to water and water vapor · CPC title