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US 10,267,049 B2Granted
Method for pre-applied waterproofing
AssigneeGCP Applied Technologies Inc.
InventorsRobert A. Wiercinski, Anandakumar Ranganathan
Life of this patent
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Abstract
Disclosed is a waterproofing membrane that comprises a carrier sheet, a pressure sensitive adhesive layer on one surface of the carrier sheet, and a protective coating layer on the adhesive layer. The protective coating layer comprises polyvinyl acetate (PVAc). The protective coating layer protects the membrane against weather exposure, tolerates foot traffic and strongly adheres to concrete cast against it.
Claims10
A method of waterproofing a concrete structure comprising:
- applying a waterproofing membrane sheet-like laminate in accordance with any preceding claim to a building substrate or concrete form, the sheet-like laminate comprising a carrier sheet having two surfaces, a pressure sensitive adhesive layer on one surface of the carrier sheet wherein the pressure sensitive adhesive has a penetration greater than 30 decimillimeters (dmm) measured in accordance with ASTM D 5-73, at 150 g, 5 sec., 70° F.;
- and a protective coating layer on the pressure-sensitive adhesive layer, wherein the protective coating layer comprises a blend of a polyvinyl acetate homopolymer in an amount of at least 40% by weight of the protective coating layer and a copolymer of vinyl acetate and vinyl laurate, wherein the vinyl laurate is present in an amount of at least 20% by weight, the protective coating layer of said membrane sheet-like laminate facing the area into which the concrete will be cast and being effective to protect the membrane against weather exposure and foot traffic and to adhere to concrete cast against it;
- and
- casting concrete such that it contacts the protective coating layer of the membrane.
1 more element
A method of waterproofing a concrete structure comprising:
- providing a waterproofing membrane sheet-like laminate in rolled form and unrolling the laminate without use of a release sheet;
- applying the waterproofing membrane sheet-like laminate to a building substrate or concrete form, the sheet-like laminate comprising a carrier sheet having two surfaces, a pressure sensitive adhesive layer on one surface of the carrier sheet wherein the pressure sensitive adhesive has a penetration greater than 30 decimillimeters (dmm) measured in accordance with ASTM D 5-73, at 150 g, 5 sec., 70° F.;
- and a protective coating layer on the pressure-sensitive adhesive layer, wherein the protective coating layer comprises a blend of a polyvinyl acetate homopolymer in an amount of at least 40% by weight of the protective coating layer and a copolymer of vinyl acetate and vinyl laurate, wherein the vinyl laurate is present in an amount of at least 20% by weight, the protective coating layer of said membrane sheet-like laminate facing the area into which the concrete will be cast and being effective to protect the membrane against weather exposure and foot traffic and to adhere to concrete cast against it;
- and
- casting concrete such that it contacts the protective coating layer of the membrane and becomes adhered to the waterproofing membrane sheet-like laminate.
2 more elements
Dependencies are inferred from the claim text.