Patent ID: 11933040
Assignee: GCP APPLIED TECHNOLOGIES INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC E  B  C | IPC B  C  E

Claim 2:
3. A method for waterproofing a building or civil engineering substrate surface, comprising:
providing a rolled waterproofing laminate membrane with a removable release sheet, the membrane when unrolled and with release sheet removed having a total composite thickness in the range of 12 mils to 115 mils;
unrolling the waterproofing laminate membrane and positioning the membrane onto a substrate surface, and removing the release sheet during or after unrolling or positioning of the waterproofing laminate membrane, the laminate membrane comprising:
a) an outer continuous layer having total average thickness in the range of 2 mils to 20 mils, said outer continuous layer comprising polyolefin or thermoplastic polyurethane and having a partially or entirely embedded reinforcing fibrous or textile structure chosen from mesh, spun-bonded fiber, or random laid fiber, whereby the polymer fills in any voids or interstices within the reinforcing structure to prevent lateral water migration within the laminate membrane when the membrane is installed upon a building or civil engineering surface;
b) a pressure sensitive adhesive layer having total thickness in the range of 5 mils to 40 mils; and
c) a closed-cell foam layer having a total thickness in the range of 5 mils to 55 mils and being located intermediate between and attached to each of the outer continuous layer and the pressure sensitive adhesive layer; and
d) a removable release sheet for protecting the pressure sensitive adhesive layer on a face opposite the face to which it is attached to the closed-cell foam layer, the removable release sheet being removed from the laminate membrane during or after it is unrolled or positioned upon the substrate surface, wherein the closed cell foam layer is made from a polymer which has a flexural modulus of less than 400,000 psi as measured in accordance with ASTM D 790.