Waterproofing membrane
A waterproofing membrane composition is provided which is strong, easy to use, trowelable, flexible, passes negative hydrostatic test ASTM D4068 and which can be flood tested after 24 hours @ 70° F. of application. The waterproofing membrane composition contains a flexible polymer, preferably an epoxy containing polyether chains formed from a glycol, a flexible curing agent, sand, and an aramid fiber. The epoxy component also preferably includes an epoxy flexibilizer and a reactive diluent for epoxy chain termination. A p-aramid fiber is preferred and it is highly preferred to use the polymer fiber in a pulp form which has a fibrillated structure.
1. A waterproofing membrane composition which is strong, workable and easy to apply, flexible, passes ASTM D4068, and cures quickly allowing for flood testing after 24 hours at 70° F., comprising: a flexible epoxy resin; a flexible curing agent; an acrylate functional urethane resin epoxy flexibilizer; sand or other inert filler; and an effective amount of a poly(p-phenylene terephthalamide) polymer fiber and/or poly(m-phenylene isophthalamide) polymer fiber.
2. The composition of claim 1 wherein the composition further contains an epoxy reactive diluent.
3. The composition of claim 2 wherein the polymer fiber is poly(p-phenylene terephthalamide).
4. The composition of claim 2 wherein the epoxy reactive diluent is an aliphatic glycidyl ether.
5. The composition of claim 1 , wherein the polymer fiber is poly(p-phenylene terephthalamide).
6. The composition of claim 5 wherein the polymer fiber is fibrillated.
7. A method of applying a waterproofing composition to a substrate comprising: providing a substrate to be waterproofed; applying a waterproofing membrane composition to the substrate surface; and curing the composition; wherein the waterproofing membrane composition comprises: a flexible epoxy resin; a flexible curing agent; an acrylate functional urethane resin epoxy flexibilizer; sand or other inert filler; and an effective amount of a poly(p-phenylene terephthalamide) polymer fiber and/or poly(m-phenylene isophthalamide) polymer fiber.
8. The method of claim 7 wherein the composition further contains an epoxy reactive diluent.
9. The method of claim 8 wherein the epoxy reactive diluent is an aliphatic glycidyl ether.
10. The method of claim 7 , wherein the polymer fiber of the composition is poly(m-phenylene isophthalamide).
11. The method of claim 10 wherein the polymer fiber is fibrillated.