阅读说明：本技术 具有防下潜层的预铺膜 (Pre-coated film with anti-submergence layer ) 是由 陈呼和 丁红梅 R·A·维尔钦斯基 曹霞 J·塞思 于 2018-12-11 设计创作，主要内容包括：用于基材防水的膜(10)和使用所述膜(10)的基材防水方法,其中所述膜(10)包括层压构造,其中所述层压构造包括载体片材(12)、压敏胶粘剂(PSA)层(14)、部分嵌入PSA层(14)中的微粒层(16)和附着于微粒层(16)的保护性顶涂层(18),所述层压构造具有平行侧边,由此可将所述层压构造沿侧边卷绕成用于运输的卷形式。(A membrane (10) for waterproofing a substrate and a method of waterproofing a substrate using the membrane (10), wherein the membrane (10) comprises a laminate construction, wherein the laminate construction comprises a carrier sheet (12), a Pressure Sensitive Adhesive (PSA) layer (14), a particulate layer (16) partially embedded in the PSA layer (14), and a protective topcoat (18) attached to the particulate layer (16), the laminate construction having parallel side edges whereby the laminate construction can be wound edgewise into roll form for transport.)

1. A film for waterproofing a substrate comprising:

a laminate construction, wherein the laminate construction comprises a carrier sheet, a Pressure Sensitive Adhesive (PSA) layer, a particulate layer partially embedded in the PSA layer, and a protective topcoat attached to the particulate layer, the laminate construction having parallel side edges whereby the laminate construction can be rolled into roll form for transport along the side edges;

the carrier sheet has an average thickness of 0.20 to 2.0 mm;

the PSA layer is adhered to the carrier sheet and has an average thickness of 0.1 to 1.0 mm;

the particulate layer partially embedded in the PSA layer and comprising Alumina Trihydrate (ATH) particles having an average diameter of 50 to 200 microns, the particulate layer having a coat weight of 10 to 300 grams per square meter; and

the protective topcoat covering portions of the partially embedded ATH particles and unembedded PSA layer, the protective topcoat being substantially free of nanosilica (i.e., no more than 0-0.25 wt%), the protective topcoat comprising a polymer selected from the group consisting of acrylic, polyvinyl acetate, acrylate/styrene copolymer, acrylate/vinyl acetate copolymer, neoprene, butyl rubber, styrene-butadiene copolymer, SEBS, or mixtures thereof; and the protective top coat further comprises a filler in an amount of 20 to 80 wt% and has an average thickness of 0.01 to 0.20 mm.

2. The film of claim 1, wherein the film has no release liner or release paper except along the sides of the film free of pressure sensitive adhesive, particulates, and top coat.

3. The film of claim 1, wherein the carrier sheet comprises a polymeric film, a woven fabric, a nonwoven fabric, or a combination thereof.

4. The membrane of claim 3, wherein the carrier sheet comprises a fabric sandwiched between two polymer films.

5. The film of claim 1, wherein the carrier sheet has an average thickness of 0.2 to 2.0 mm.

6. The membrane of claim 1, wherein the carrier sheet comprises polypropylene, polyethylene, ethylene-propylene copolymers, ethylene-olefin copolymers, ethylene-vinyl acetate copolymers, polyvinyl acetate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), Thermoplastic Polyolefins (TPO), or a mixture of any of the foregoing polymers or copolymers.

7. The film of claim 1, wherein the carrier sheet is a multilayer laminate having at least two layers, each of the at least two layers comprising a different polymer or combination of polymers.

8. The membrane of claim 1, wherein the pressure sensitive adhesive comprises a rubber modified bituminous adhesive or a synthetic polymer.

9. The film of claim 8, wherein the pressure sensitive adhesive comprises butyl rubber, polyisobutylene, styrene-isoprene-styrene (SIS), styrene-ethylene-butylene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), Amorphous Polyolefin (APO), or a mixture of any of the foregoing adhesives.

10. The film of claim 1 wherein the ATH particle layer has a coat weight of from 100 to 200 grams per square meter.

11. The film of claim 10, wherein the ATH particles have an average diameter of from 50 to 200 microns.

12. The film of claim 1 wherein the protective topcoat comprises a film forming polymer latex selected from the group consisting of acrylates, polyvinyl acetates, acrylate/styrene copolymers, acrylate/vinyl acetate copolymers, and mixtures thereof.

13. The film of claim 1 wherein the protective topcoat has an average coat weight of 10 to 200 grams per square meter and an average thickness of 0.01 to 0.20 mm.

14. The film of claim 1, wherein the protective topcoat further comprises at least one filler in an amount of 20 wt% to 80 wt%.

15. The film of claim 14, wherein the protective topcoat comprises at least one filler selected from the group consisting of calcium carbonate, magnesium carbonate, titanium dioxide, dolomite, wollastonite, barium sulfate, crystalline or amorphous silica, bentonite, talc, or mixtures thereof.

16. A method of waterproofing a substrate comprising: attaching the film of claim 1 to a building or civil engineering surface.

17. A method of waterproofing a substrate comprising:

attaching a first film according to claim 2 to an architectural or civil engineering surface, the first film comprising a release liner or paper only along the side edges of the film; and

attaching a second film to a surface immediately adjacent the first film, the second film also including a release liner or paper only along the side edges of the second film; and

the first and second films are sealed together at the overlapping portion.

Technical Field

The present invention relates to the protection of building structures from water and moisture, and more particularly to a waterproofing membrane having a carrier sheet, a pressure sensitive adhesive layer, a layer of reactive particulates, and an outer protective coating layer that prevents the reactive particulates from "submerging" into the adhesive layer when the membrane is shipped in a roll.

Background

In international publication WO 2017/058154 a1 to Chen et al (assigned to the common assignee herein), a pre-laid waterproofing membrane for bonding to post-cast concrete and promoting sealing at the membrane-to-membrane overlap is disclosed.

The film includes a carrier sheet and a layer of Pressure Sensitive Adhesive (PSA), a layer of inorganic particles having microparticles partially embedded in the PSA and having an average particle size less than the average thickness of the PSA layer, and a "sloughing-preventing" nanosilica-containing coating attached to uninserted portions of the inorganic particles to prevent complete embedding in the PSA layer when the film is shipped in a roll and to allow a water-tight seam to be achieved at the overlap of adjacent films. The water-tight seams can be achieved by using detail tape or waterproof tape, preferably without the use of primers, mastics or additional coatings.

The present invention provides novel and inventive improvements to the process taught in WO' 154 by taking an anti-intuitive approach to pre-laid film design, as further explained below.

Summary of The Invention

Exemplary pre-laid waterproofing membranes of the present invention use a reactive particle layer comprising alumina trihydrate (or "alumina trihydrate") particles ("ATH") partially embedded in an underlying pressure sensitive adhesive layer, the ATH particles having uninserted portions that are coated with an outer polymeric protective coating. On the outer protective coating, the concrete is post-poured and allowed to cure against the film or films. A number of advantages are achieved by this method compared to the use of a nanosilica top coating as taught in WO 2017/058154 a 1.

The inventors determined that the film-to-film bond strength of the waterproofing film of WO 2017/058154 a1 is about 0.6-0.7N/mm when tested according to ASTM D1876 (2015). In contrast, exemplary films of the present invention were found to have a film-to-film bond strength of 1.0 to 1.2N/mm when tested by the same method.

This improved bond strength performance means that, under realistic conditions, the waterproofing membranes of the present invention should have a higher resistance to dust, dirt, water immersion, high temperatures and other adverse conditions and elements common at construction sites.

In addition to omitting the nanosilica topcoat, the inventors used a protective polymeric topcoat having an average thickness of 0.01 mm to 0.20 mm, which was much thicker than the outer nanosilica topcoat taught in WO 2017/058154 a 1. Despite the greater thickness, the polymer top coat does not interfere with satisfactory bonding of ATH particles to post cast concrete.

The thicker outer protective polymer coating also provides better antiblocking and increased flexibility and elongation during shipping than the nanosilica top coatings taught in the prior art, so that the film more readily accommodates dimensional irregularities and surface details (e.g., corners) when laid on a job site.

Another benefit is that the outer polymeric protective coating has a higher toughness than the inorganic nanosilica particles. For example, the outer polymer coating exhibits better scrub resistance, which withstands 20,000 rubs during testing in accordance with China Code GB/T9266-. The excellent scrub resistance of the outer polymeric coating is an additional benefit given that previous methods often relied on the use of inorganic particles or high filler content in the outer coating.

An exemplary film of the invention comprises:

a laminate construction, wherein the laminate construction comprises a carrier sheet, a Pressure Sensitive Adhesive (PSA) layer, a particulate layer partially embedded in the PSA layer, and a protective topcoat attached to the particulate layer, the laminate construction having parallel side edges whereby the laminate construction can be wound into roll form for shipping;

the carrier sheet has an average thickness of 0.20 to 2.0 mm;

the PSA layer is adhered to a carrier sheet and has an average thickness of 0.1 to 1.0 mm;

the particulate layer partially embedded in the PSA layer and comprising Alumina Trihydrate (ATH) particles having an average diameter (average diameter) of from 50 to 200 microns, the particulate layer having a coat weight of from 10 to 300 grams per square meter; and

the protective topcoat covering portions of the partially embedded ATH particles and unembedded PSA layer, the protective topcoat being substantially free of nano-silica (i.e., no more than 0-0.25 wt%), the protective topcoat comprising a polymer selected from the group consisting of acrylic, polyvinyl acetate, acrylate/styrene copolymer, acrylate/vinyl acetate copolymer, neoprene (chloroprene), butyl rubber, styrene-butadiene copolymer, SEBS, or mixtures thereof; and the protective top coat further comprises a filler in an amount of 10 to 80 wt% and has an average thickness of 0.01 to 0.20 mm.

The present invention also provides an exemplary method, comprising: attaching the above-described film to a substrate (e.g., a jacketing form, wall, ground, foundation, tunnel wall, or other structure) such that the PSA, particle layer, and top coat thereof face outward; and casting concrete against the PSA side and allowing it to cure, thereby forming a bond between the concrete and the membrane.

Further advantages and features of the invention are described in detail below.

Brief Description of Drawings

The benefits and features of the present invention will become more readily apparent by considering the following written description of exemplary embodiments taken in conjunction with the accompanying drawings, wherein

FIG. 1 is a photograph of an outer layer of (uncoated) alumina trihydrate particles partially embedded in a Pressure Sensitive Adhesive (PSA) layer of a prior art pre-laid waterproofing membrane according to U.S. Pat. No. 6,500,520;

FIG. 2 is a photograph of an outer layer of a prior art pre-laid waterproofing membrane according to WO 2017/058154A 1;

fig. 3 is a photograph of a prior art pre-laid waterproofing membrane according to US 2016/0040440 with an outer polyvinyl acetate coating containing (up to 35%) filler particles;

FIG. 4 is a photograph of an exemplary film of the present disclosure having an outer polymeric protective coating covering a reactive particle layer comprising alumina trihydrate ("ATH") particles partially embedded in an underlying pressure sensitive adhesive layer; and

FIG. 5 is a side perspective plan view of an exemplary waterproofing membrane of the present invention.

Detailed description of illustrative embodiments

Fig. 1 is an SEM image of a prior art pre-laid waterproofing membrane initially disclosed in us patent 6,500,520, comprising a flexible carrier sheet, a Pressure Sensitive Adhesive (PSA) layer and a layer of particles of 25 to 1000 microns. If the particle size is less than or equal to 100u, the inventors believe that a major disadvantage is that the film requires a release liner to prevent blocking, or in other words, prevent one layer of the film from sticking to an adjacent layer in the roll. Another disadvantage of this approach is that the particles do not provide complete protection to the adhesive layer, as it does not cover the entire (100%) outwardly disposed adhesive surface, as is evident from fig. 1.

Fig. 2 is an SEM image of a prior art pre-laid waterproofing membrane as disclosed in us patent WO 2017/058154 a 1. The film includes a carrier sheet, a Pressure Sensitive Adhesive (PSA) layer, a layer of inorganic particles having an average particle size less than the average thickness of the PSA layer, and an "anti-sag" nanosilica-containing coating attached to uninserted portions of the inorganic particles.

As shown in fig. 2, the "anti-dive" nanosilica-containing coating is not continuous. It does not provide complete protection for the adhesive layer.

Fig. 2 also shows that the top coat has cracking problems, which further worsens the protective function of the top coat.

Fig. 3 is an SEM image of a pre-laid film according to the prior art of us patent 2016/0040440. The waterproofing membrane comprises a carrier sheet, a pressure sensitive adhesive layer on one surface of the carrier sheet, and a polyvinyl acetate (PVAc) protective coating containing 30% TiO2 as a filler.

As shown in fig. 3, the PVAc coating exhibits cracks or holes due to the low flexibility of the polymer latex and the high filler content in the coating.

Fig. 4 is an SEM image of a waterproofing membrane of the present invention, which includes a carrier sheet, a pressure-sensitive adhesive layer, an ATH particle layer, and an acrylic polymer layer. Figure 4 shows that the elastomeric acrylic polymer layer forms a continuous coating over the microparticles and PSA to provide good protection during film exposure at the job site and to eliminate blocking problems during long distance transport.

FIG. 5 illustrates an exemplary pre-laid waterproofing membrane 10 of the present invention comprising a flexible carrier sheet 12 having two major faces; a pressure sensitive adhesive layer (PSA) 14 having two major faces, one major face of which is attached to one major face of the carrier sheet 12; a layer of alumina trihydrate particles 16 having individual microsomes having an average size (diameter) less than the average thickness of the PSA layer 14 and partially embedded in the PSA layer 14 on the opposite face to that attached to the major face of the carrier sheet 12; and a flexible protective coating 18 formed on portions of the non-embedded microparticles 16. Preferably, the flexible protective coating 18 is formed by applying at least one polymeric film-forming material having various levels of fillers and additives to the exposed individual particles of the layer of alumina trihydrate particles 16 and allowing the coating 18 to dry.

The exemplary flexible carrier sheet 12 most useful in the present invention should provide mechanical strength and water-proof integrity to the membrane 10.

Exemplary carrier sheet 12 typically has a thickness of 0.2 to 2.0mm, more preferably 0.5 to 1.0 mm. Examples of the carrier sheet or layer 12 should further have a generally smooth surface such as a film, sheet, woven fabric, or nonwoven fabric. Suitable materials include polypropylene, polyethylene, ethylene-propylene copolymers, ethylene-olefin copolymers, ethylene-vinyl acetate copolymers, polyvinyl acetate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), Thermoplastic Polyolefins (TPO), and combinations thereof. Polyethylene and polypropylene are preferred.

An exemplary Pressure Sensitive Adhesive (PSA) layer 14 provides waterproofing integrity to the waterproofing membrane 10. The PSA layer 14 is used to bond the AOT inorganic particle layer 16 to the carrier sheet 12 and should have a thickness of 0.1 to 1.0mm, more preferably about 0.2 to 0.5 mm.

Rubber modified bituminous adhesives or adhesives based on synthetic polymers may be used in the present invention.

Exemplary synthetic polymer adhesives contemplated for use in the PSA layer 14 may be selected from butyl rubber, polyisobutylene, styrene-isoprene-styrene (SIS), styrene-ethylene-butylene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), and combinations thereof.

Preferably, the synthetic adhesive used in the PSA layer 14 is a pressure sensitive hot melt adhesive block copolymer selected from SIS, SBS, SEBS, or mixtures thereof.

Exemplary synthetic adhesive layer 14 may optionally contain additives commonly used in waterproofing membranes, including, but not limited to, light absorbers (e.g., carbon black, benzotriazoles, and the like), light stabilizers (e.g., hindered amines, benzophenones), antioxidants (e.g., hindered phenols), fillers (e.g., calcium carbonate, silica, titanium dioxide, and the like), plasticizers, rheological additives, and mixtures thereof. A preferred combination is a layer of a synthetic PSA composition comprising a light absorber, a light stabilizer, an antioxidant or mixtures thereof.

Another example of a Pressure Sensitive Adhesive (PSA) 14 includes one or more amorphous polyolefins. Amorphous Polyolefins (APO) are defined as polyolefins having a crystallinity of less than 30% as measured by differential scanning calorimetry. These polymers may be homopolymers of propylene or copolymers of propylene with one or more alpha-olefin comonomers, such as ethylene, 1-butene, 1-hexene, 1-octene and 1-decene. APO polymers of the above type are available under the trade name EASTOFLEX @, from Eastman Chemical Company, Kingsport, Tennessee or REXTAC @, from Huntsman Corporation, Houston, Texas or VESTOPLAST @, from Degussa Corporation, Parsippany, N.J.. Like the rubber-based adhesive, the polymer is also used in combination with tackifiers and plasticizers to produce a PSA composition that can be coated onto the carrier sheet 12 or that can be a preformed layer 14 that can be laminated (rolled) or extruded) onto the carrier sheet 12. See, for example, Eastman bulletin "Pressure-Sensitive Adhesives Based on Amorphous polyofin From Eastman Chemical Company".

The most preferred inorganic particle layer 16 of the present invention comprises alumina trihydrate ("ATH") having an average particle size of 50 to 200 microns and a cover weight of 10 to 300 grams per square meter.

Exemplary ATH particles are attached to the PSA layer, but are partially exposed on the PSA layer after being embedded in the PSA layer. The ATH particle layer serves several functions. First, it increases the relative surface area available for cast concrete bonding (e.g., in combination with PSA layer 14) and provides a rough substrate for subsequent protective coatings for anchoring and bonding (as compared to PSA alone). The ATH particle layer also keeps the film surface cooler and blocks damaging UV radiation to minimize the rate of degradation of the PSA layer 14 by sunlight.

The ATH particles 16 also prevent blocking and eliminate the need for a removable release liner (e.g., wax or siliconized paper) to protect the PSA layer. The lining removed during the laying process generates waste and involves an additional cleaning step.

ATH particles (16) can also improve the foot slip resistance of film 10 and the trafficability (treadability resistance) of film 10 during the laying process.

Finally, as previously discussed, the waterproofing membrane 10 of the present invention includes a more flexible anti-sag coating 18 that provides further protection to the adhesive layer 14. Coating 18 also helps to anchor particulate layer 16 to facilitate the creation of water-impermeable seams at end-laps between adjacent waterproofing membranes 10 by an applicator (applicator).

The exemplary flexible anti-dive coating 18 includes at least one film-forming polymer latex, inorganic fillers, and various additives.

Suitable polymer latexes in emulsion form can include polymers of acrylates, polyvinyl acetates, acrylate/styrene copolymers, acrylate/vinyl acetate copolymers, and mixtures thereof. Polymers of acrylates are most preferred. To ensure better coverage, the flexible anti-dive topcoat should have a dry coat weight of 10-300 grams per square meter, more preferably 30-100 grams per square meter.

The exemplary flexible anti-dive topcoat 18 may include various fillers and additives in an amount of 20-80% by weight. Preferred fillers in the coating 18 may be selected from calcium carbonate, magnesium carbonate, titanium dioxide, dolomite, wollastonite, barium sulfate, crystalline or amorphous silica, bentonite, talc, and the like.

The flexible top coat 18 may optionally contain various other additives that may be preferred by the film designer depending on the application needs, such as thickeners, dispersants, anti-mold agents (anti-mold agents), defoamers, film coalescing aids.

As previously described, the exemplary anti-dive topcoat 18 of the present invention is more flexible than the nanosilica-containing topcoat disclosed in WO 2017/058154 a 1. As an indication of the elasticity of the anti-dive topcoat 18, the elongation of the topcoat was measured after casting a 1.0-1.5mm coating. The top coat in the present invention exhibits an elongation of 50% to 500%; whereas the nanosilica-containing top coat described in WO 2017/058154 a1 exhibits an elongation of less than 20% when tested by the same method. A more flexible top coat presents a number of advantages.

The flexible protective coating 18 of the preferred embodiment achieves good coverage over the peaks and valleys of the ATH particles and establishes a water-tight, weather-resistant, flexible interface over the particle layer, which provides better crack resistance when the film 10 is folded to lay down on irregular areas of a construction site. The protective coating 18 is also more resistant to dimensional changes in the carrier sheet caused by external temperature fluctuations. Another advantage of a flexible protective coating is that the thickness of the coating can be increased without cracking problems.

The flexible top coat exhibits good UV resistance. The top coat did not show any cracks on the surface after 2/4/6/8 weeks of exposure in real weather in hot summer. When concrete is poured over the strips of the membrane 10 of the present invention and allowed to cure for one week, the bond strength is excellent.

The adhesive strength is excellent even after the film has been soaked in water. To test this advantageous property, the inventors poured concrete onto strips of the inventive membrane 10 and allowed the concrete to cure for 7 days. The assembly was then soaked in water for 30/60/90 days. The bond between the membrane 10 and the concrete after a period of water immersion was measured and compared to the not yet immersed assembly and found to be very good.

The side overlap of the waterproofing membrane in the present invention (overlap in the longitudinal direction of the membrane) comprises an overlap width of 70-120 mm. Side lap joint treatment methods include self-adhesion or taping or welding. For self-adhesive side lap joints, a release liner is necessary (but only at the edges of the film) to protect the adhesive prior to lay down. Thus, at the construction site, only the side liners need to be removed as appropriate. Adhesive-to-adhesive bonding at the overlapped portions of adjacent films is the most preferred treatment as it provides even higher bond strength.

Various exemplary embodiments are described below.

In a first exemplary embodiment, a membrane for waterproofing a substrate, comprising:

a laminate construction, wherein the laminate construction comprises a carrier sheet, a Pressure Sensitive Adhesive (PSA) layer, a particulate layer partially embedded in the PSA layer, and a protective topcoat attached to the particulate layer, the laminate construction having parallel side edges whereby the laminate construction can be rolled into roll form for transport along the side edges;

the carrier sheet has an average thickness of 0.20 to 2.0 mm;

the PSA layer is adhered to a carrier sheet and has an average thickness of 0.1 to 1.0 mm;

the particulate layer partially embedded in the PSA layer and comprising Alumina Trihydrate (ATH) particles having an average diameter of 50 to 200 microns, the particulate layer having a coat weight of 10 to 300 grams per square meter; and

the protective topcoat covering portions of the partially embedded ATH particles and unembedded PSA layer, the protective topcoat being substantially free of nanosilica (i.e., no more than 0-0.25 wt%), the protective topcoat comprising a polymer selected from the group consisting of acrylic, polyvinyl acetate, acrylate/styrene copolymer, acrylate/vinyl acetate copolymer, neoprene, butyl rubber, styrene-butadiene copolymer, SEBS, or mixtures thereof; and the protective top coat further comprises a filler in an amount of 10 to 80 wt% and has an average thickness of 0.01 to 0.20 mm.

In a second exemplary embodiment, which may be based on the first exemplary embodiment, the film does not have a release liner or paper, except along the side edges of the film that are free of particulates and protective topcoat layers.

In a first aspect of the second exemplary embodiment, the side edges of the film comprise only the carrier sheet. In other words, the side edges of the film do not include a PSA layer, a particulate layer, or a topcoat. This configuration makes it easier to join and seal adjacent films together using tape, such as double-sided tape, or welding (e.g., hot air welding, extrusion welding, etc.).

In a third exemplary embodiment, which may be based on any one of the first to second exemplary embodiments, the carrier sheet comprises a polymeric film, a woven fabric, a nonwoven fabric, or a combination thereof.

In a fourth exemplary embodiment, which may be based on any one of the first to third exemplary embodiments, the carrier sheet comprises a fabric layer sandwiched between two polymer film layers.

In a fifth exemplary embodiment, which may be based on any one of the first to fourth exemplary embodiments, the carrier sheet has a thickness of 0.2 to 2.0 mm; more preferably 0.3 to 1.5 mm; most preferably 0.5 to 1.0 mm.

In a sixth exemplary embodiment, which may be based on any one of the first to fifth exemplary embodiments, the carrier sheet comprises polypropylene, polyethylene, ethylene-propylene copolymers, ethylene-olefin copolymers, ethylene-vinyl acetate copolymers, polyvinyl acetate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), Thermoplastic Polyolefin (TPO), or a mixture of any of the above polymers or copolymers.

In a seventh exemplary embodiment, which may be based on any one of the first to sixth exemplary embodiments, the film has a carrier sheet in the form of a multilayer laminate having at least two layers, each comprising a different polymer or combination of polymers. In a first aspect of this seventh exemplary embodiment, the carrier sheet is a multilayer polymer laminate comprising a High Density Polyethylene (HDPE) layer sandwiched between two Low Density Polyethylene (LDPE) layers, which the inventors believe is advantageous for overlapping the respective carrier sheets of adjacently laid films using thermal welding at the construction site. In a second aspect of this seventh exemplary embodiment, the carrier sheet further comprises a gas barrier layer, such as polyvinyl alcohol (PVOH). Thus, as another example, a multilayer polymeric laminate may comprise a laminate structure: LDPE/HDPE/PVOH/HDPE/LDPE. Between the polymer or copolymer layers of the exemplary multi-layer carrier sheet, tie coat materials, as known in the lamination art, may be used.

In an eighth exemplary embodiment, which may be based on any one of the first to seventh exemplary embodiments, the pressure sensitive adhesive comprises a rubber modified bituminous adhesive or a synthetic polymer.

In a ninth exemplary embodiment, which may be based on any one of the first to eighth exemplary embodiments, the pressure sensitive adhesive of the film comprises a synthetic rubber or elastomer selected from the group consisting of butyl rubber, polyisobutylene, styrene-isoprene-styrene (SIS), styrene-ethylene-butylene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), Amorphous Polyolefin (APO), or a mixture of any of the foregoing materials.

In a tenth exemplary embodiment, which may be based on any one of the first to ninth exemplary embodiments, the Alumina Trihydrate (ATH) particles of the ATH layer of the membrane have a coating weight of from 100 to 200 g/m.

In an eleventh exemplary embodiment, which can be based on any one of the first to tenth exemplary embodiments, the Alumina Trihydrate (ATH) particles have a particle size of 50 to 200 microns; more preferably 100 to 150 microns.

In a twelfth exemplary embodiment, which may be based on any one of the first to eleventh exemplary embodiments, the protective topcoat layer comprises a film forming polymer latex selected from the group consisting of acrylates, polyvinyl acetates, acrylate/styrene copolymers, acrylate/vinyl acetate copolymers, and mixtures thereof. Acrylate polymers are most preferred.

In a thirteenth exemplary embodiment, which may be based on any one of the first to twelfth exemplary embodiments, the protective topcoat layer has an average coat weight of 10 to 200 grams per square meter and an average thickness of 0.01 to 0.20 mm.

In a fourteenth exemplary embodiment, which may be based on any one of the first to thirteenth exemplary embodiments, the protective top coat further comprises at least one filler in an amount ranging from 20 wt.% to 80 wt.%.

In a fifteenth exemplary embodiment, which may be based on any one of the first to fourteenth exemplary embodiments, the protective top coat layer comprises at least one filler selected from the group consisting of calcium carbonate, magnesium carbonate, titanium dioxide, dolomite, wollastonite, barium sulfate, crystalline or amorphous silica, bentonite, talc or mixtures thereof.

In a sixteenth exemplary embodiment, the present disclosure provides a method of waterproofing a substrate comprising: attaching a membrane according to any one of claims 1 to 15 to a building or civil engineering surface. For example, the carrier sheet side is adhered or otherwise placed to a building surface, such as in the form of a foundation or insulation sleeve, and concrete is then poured against the top-coated pressure sensitive adhesive layer side of the membrane.

In a seventeenth exemplary embodiment, the present disclosure provides a method of waterproofing a substrate comprising:

attaching a first film according to any one of claims 2 to 15 to an architectural or civil engineering surface, the first film comprising a release liner or paper only along the side edges of the film; and

attaching a second film to a surface immediately adjacent the first film, the second film also including a release liner or paper only along the side edges of the second film; and

the first and second films are sealed together at the overlapping portion.

An integral water barrier is established by sealing two or more membranes together and pouring concrete over the two or more membranes.

While the invention is described herein using a limited number of embodiments, these specific embodiments are not intended to limit the scope of the invention as otherwise described and claimed herein. There are modifications and variations to the described embodiments. More specifically, the following examples are given as specific illustrations of embodiments of the claimed invention. It should be understood that the invention is not limited to the specific details given in the examples. All parts and percentages in the examples, as well as in the remainder of the specification, are by weight unless otherwise specified.

Furthermore, any range of values recited in the specification or claims, such as ranges representing a particular set of properties, units of measure, conditions, physical states or percentages, is intended to literally incorporate expressly herein by reference or otherwise, any number falling within such range, including any subset of numbers within any range so recited. For example, whenever a numerical range with a lower limit, RL, and an upper limit, RU, is disclosed, any number, R, falling within the range is specifically disclosed. In particular, the following values R within this range are specifically disclosed: r = RL + k (RU-RL), wherein k is a variable from 1% to 100% in 1% increments, e.g., k is 1%, 2%, 3%, 4%, 5% … 50%, 51%, 52% … 95%, 96%, 97%, 98%, 99%, or 100%. In addition, any numerical range represented by any two R values calculated as above is also specifically disclosed.

Examples

Comparison of different particles

Four different types of inorganic microparticles were spread onto a 0.30mm thick layer of SIS-based PSA and an acrylic coating was sprayed thereon at comparable coat weights (40-60 grams). After casting fresh concrete on the membrane, the specimen was cured in a wet room (23 ℃, 90% RH) for 1 week, then tested for initial BTC and water immersion was started. According to ASTM D903 (180)^oSpeed 100 mm/min) the initial bond strength to post-cast concrete (BTC) and the bond strength to post-cast concrete after 2/4 weeks of water immersion were tested. The ATH-dispersed samples exhibited the best bonding performance compared to the samples dispersed with hydrated cement, quartz sand and mullite powder.

TABLE 1

Comparison of different acrylate coatings

The particulate layer was prepared by spreading 100 mesh ATH particles onto a 0.30mm SIS based PSA layer and then spraying three different acrylate coatings on the ATH particle layer at comparable coat weights. The initial BTC, after UV aging and after water immersion were tested for BTC. The UV aging method involves the use of a QUV Accelerated Weathering Tester (Accelerated weather Tester) with UVA at 340nm, 0.68 w/m2/nm radiation and a room temperature setting of 60 + -3 deg.C.

After 72 and 120 hours of UV aging, the samples were subjected to concrete cast thereon and tested for BTC strength after 1 week in a wet room (23 ℃, 90% RH). As can be seen from the results below, acrylate coating a exhibited the best performance compared to coatings B and C.

Polymer structure, surfactant type and content, filler content, etc. are believed to be the factors that most affect the adhesion of the membrane to concrete (BTC), especially BTC after water immersion.

TABLE 2

Performance of different prototypes

Three different prototypes were prepared. (1) 0.30mm SIS based PSA with 100 mesh ATH spread over the adhesive; (2) 0.30mm SIS based PSA + PVAc coating containing 30% TiO2 as filler; (3) 0.30mm SIS based PSA + 100 mesh ATH + acrylate coating. The initial BTC, after UV aging and after water immersion were tested for BTC. UV aging method Using a QUV accelerated weathering tester, the test conditions were UVA 340nm, 0.68 w/m2/nm radiation and room temperature was set at 60. + -. 3 ℃. After 72 and 120 hours UV aging, the samples were cast into concrete and tested for BTC strength after 1 week in a wet room (23 ℃, 90% RH).

The prototype of the application showed the best adhesive properties, with BTC being very stable after water immersion and after UV aging. The BTC after UV aging was comparable to the initial BTC intensity and no cracks appeared on the film after UV aging. The BTC was also stable after 2/4 weeks of water immersion.

The "SIS + ATH" prototype showed a rapid decline after 2/4 weeks of water immersion. After 2/4 weeks of water immersion, the BTC strength dropped from 2.7N/mm to 1.9-2.0N/mm. "SIS + ATH" also showed debonding from concrete after 120h QUV aging. The "SIS + PVAc" prototype also showed a faster drop in BTC after water immersion, from 3.4N/mm to 1.1-1.2N/mm after 2/4 weeks of water immersion. Although the BTC strength was similar to the initial BTC strength after UV aging, many cracks appeared on the film surface.

TABLE 3

The foregoing examples and embodiments are given by way of illustration only and are not intended to limit the scope of the invention.