초록 ▼

The present invention is directed to a method for impregnating at least one geofabric with a liquid solidifiable polyurethane composition, conforming at least one polyurethane-impregnated geofabric to a surface (such as to the surface of a canal, ditch and/or pipe) and allowing the liquid solidifiab

The present invention is directed to a method for impregnating at least one geofabric with a liquid solidifiable polyurethane composition, conforming at least one polyurethane-impregnated geofabric to a surface (such as to the surface of a canal, ditch and/or pipe) and allowing the liquid solidifiable polyurethane composition to cure and form a polyurethane/geofabric composite. The liquid solidifiable polyurethane composition is the reaction product of COMPONENT A, COMPONENT B and COMPONENT C, as defined herein. COMPONENT C has the same equivalent weight as COMPONENT B and contains catalyst. One advantage of the present invention is that the ratio of COMPONENT B to COMPONENT C can be adjusted during processing without changing the isocyanate index. As a result, geltimes of liquid solidifiable polyurethane compositions of the present invention can be adjusted to accommodate changes in outdoor application temperature.

대표청구항 ▼

The present invention is directed to a method for impregnating at least one geofabric with a liquid solidifiable polyurethane composition, conforming at least one polyurethane-impregnated geofabric to a surface (such as to the surface of a canal, ditch and/or pipe) and allowing the liquid solidifiab

The present invention is directed to a method for impregnating at least one geofabric with a liquid solidifiable polyurethane composition, conforming at least one polyurethane-impregnated geofabric to a surface (such as to the surface of a canal, ditch and/or pipe) and allowing the liquid solidifiable polyurethane composition to cure and form a polyurethane/geofabric composite. The liquid solidifiable polyurethane composition is the reaction product of COMPONENT A, COMPONENT B and COMPONENT C, as defined herein. COMPONENT C has the same equivalent weight as COMPONENT B and contains catalyst. One advantage of the present invention is that the ratio of COMPONENT B to COMPONENT C can be adjusted during processing without changing the isocyanate index. As a result, geltimes of liquid solidifiable polyurethane compositions of the present invention can be adjusted to accommodate changes in outdoor application temperature. B>pSi)q (1) wherein R1and R2each are hydrogen or a substituted or unsubstituted aliphatic, alicyclic, or aromatic hydrocarbon group, X is selected from the group consisting of R1,an alkoxy group, halogen atom, oxygen atom, and nitrogen atom, m is a number of 0.1 to 1, n is a number of 0.1 to 1, p is a number of 0 to 0.5, the sum of m+n+p is from 1 to 2.5, and q is an integer of 2 to 100,000. 5. The method of claim 3, wherein the polysiloxane having Si--H bonds is represented by the following formula (2): (R1rR2tHuSiOa)s (2) wherein R1and R2each are hydrogen, a substituted or unsubstituted aliphatic, alicyclic, or aromatic hydrocarbon group, alkoxy group, or halogen atom, r is a number of 0.1 to 1, t is a number of 0.1 to 1, u is a number of 0.01 to 1, the sum of r+t+u is from 1 to 2.5, "a" is a number of 0.01 to 1.5, and s is an integer of 2 to 100,000. 6. The method of claim 3, wherein the metal having a standard oxidation-reduction potential of at least 0.54 volt is palladium, silver, or gold. 7. The method of claim 1, wherein the alkane thiol is represented by the following formula (3): RSH (3) wherein R is a substituted or unsubstituted aliphatic, alicyclic, or aromatic hydrocarbon group.