Modified cold applied asphalt emulsion
Embodiments of the present disclosure are directed to an adhesive asphalt emulsion. The adhesive asphalt emulsion can be prepared in liquid form and applied to a material, such as a film or fabric, to create a self-adhering membrane. In some embodiments, the adhesive can be water vapor permeable, and can be applied in a continuous layer to a membrane. The adhesive asphalt emulsion can be prepared, applied, and in service at low temperatures.
1. A self-adhering, water vapor permeable multilayer sheet material for structural surfaces of buildings comprising:
a water vapor permeable membrane selected from the group consisting of a water vapor permeable flexible sheet and a water vapor permeable flexible film; and
a water vapor permeable aqueous asphalt-emulsion dried adhesive layer on at least one side of the membrane, the adhesive consisting of;
about 0 to about 22% by weight of an acrylic polymer; about 30 to about 36% by weight of asphalt; about 28 to about 40% by weight of water; between about 2 and 3.2% by weight of glycol; and up to about 42% by weight of at least one filler forming at least one passage for water vapor through the adhesive layer;
wherein the multilayer sheet material has a service temperature of about −40° C. to about 80° C.
2. The multilayer sheet material of claim 1 , wherein the asphalt-emulsion adhesive on the membrane is a continuous layer.
3. The multilayer sheet material of claim 1 , wherein the asphalt-emulsion adhesive on the membrane is a discontinuous layer.
4. The multilayer sheet material of claim 1 , wherein the water vapor permeable membrane comprises a microporous sheet or film of a spunbonded or fibrous bonded polyolefin.
5. The multilayer sheet material of claim 1 , wherein the filler comprises calcium carbonate, titanium dioxide, black iron, aluminum trihydrate, elastomeric polymers and fibers selected from the group of polyamide fibers, polyester, polypropylene and polyurethane.
6. The multilayer sheet material of claim 1 , wherein the structural surface to which the material is applied is a wall.
7. A self-adhering, water vapor permeable multilayer sheet material for structural surfaces of buildings comprising:
a water vapor permeable membrane selected from the group consisting of a water vapor permeable flexible sheet and a water vapor permeable flexible film; and
a water vapor permeable aqueous asphalt-emulsion dried adhesive layer on at least one side of the membrane, the adhesive consisting of;
about 0 to about 22% by weight of an acrylic polymer; about 30 to about 36% by weight of asphalt; about 28 to about 40% by weight of water; about 2 to about 3.2% by weight of glycol; and up to about 42% by weight of at least one filler forming at least one passage for water vapor through the adhesive layer; and an epoxidized soy bean oil;
wherein the multilayer sheet material has a service temperature of about −40° C. to about 80° C.