Coated conduits and methods of repairing or reinforcing conduits

Abstract

The present invention is directed to a coated conduit comprising: a) a conduit having an interior and exterior surface; and b) a cured coating formed from a reaction mixture that is applied to at least one surface of the conduit. The reaction mixture comprises: i) a filler material comprising fibers ranging in length from 0.1 to 15.54 cm and having an aspect ratio of at least 5; and ii) a reactive component that demonstrates a tack-free time of less than five minutes at a temperature of 20 to 25° C. The present invention is also directed to a method of repairing or reinforcing a conduit, comprising: (a) applying a curable coating composition to at least one surface of the conduit, wherein the curable coating composition is formed from the reaction mixture described above; and (b) allowing the curable coating composition to at least partially cure by exposing the composition to ambient conditions.

1 .- 22 . (canceled) 
     
     
         23 . A method of repairing or reinforcing a conduit, comprising:
 combining a first reactive component, a second reactive component, and a rheology modifier using a mixing device to form a curable coating composition; and   applying the curable coating composition to at least one surface of the conduit while allowing the curable coating composition to at least partially cure by exposing the coating composition to a temperature from 15.6 to 32.2° C.   
     
     
         24 . The method of  claim 23 , wherein the rheology modifier comprises silica, the rheology modifier present in an amount from 0.5 to 6 percent by weight, based on a total weight of the curable coating composition. 
     
     
         25 . The method of  claim 23 , wherein the curable coating composition further comprises fibers ranging in length from 0.1 to 15.54 cm and having an aspect ratio of at least 5, the fibers present in the curable coating composition in an amount from 1 to 50 percent by weight, based on a total weight of the curable coating composition. 
     
     
         26 . The method of  claim 23 , wherein the curable coating composition demonstrates a tack-free time of less than 5 minutes at a temperature from 20 to 25° C. 
     
     
         27 . The method of  claim 23 , wherein the first reactive component comprises an isocyanate functional compound and the second reactive component comprises an amine functional compound. 
     
     
         28 . The method of  claim 23 , wherein the first reactive component comprises a Michael addition donor functional compound and the second reactive component comprises a Michael addition acceptor functional compound. 
     
     
         29 . The method of  claim 23 , wherein the first reactive component comprises an alkenyl functional compound and the second reactive component comprises a thiol functional compound. 
     
     
         30 . The method of  claim 23 , wherein the curable coating composition further comprises at least one of:
 a third reactive component; and   one of the first and second reactive components comprising two types of chemical functional groups.   
     
     
         31 . The method of  claim 23 , wherein the mixing device comprises a proportioner with two separate chambers respectively containing the first and second reactive components and is operable to impinge the first and second reactive components upon each other to effectuate intimate mixing of the first and second components. 
     
     
         32 . The method of  claim 23 , wherein the mixing device produces the curable coating composition at a volume ratio of the first and second reactive components from 0.8:1 to 1.2:1. 
     
     
         33 . A method of repairing or reinforcing a conduit, comprising:
 combining a first reactive component, a second reactive component, and a rheology modifier using a mixing device to form a curable coating composition, the mixing device having two separate chambers respectively containing the first and second reactive components and operable to impinge the first and second reactive components upon each other to effectuate intimate mixing of the first and second components; and   applying the curable coating composition to at least one surface of the conduit while allowing the curable coating composition to at least partially cure.   
     
     
         34 . The method of  claim 33 , wherein the mixing device produces the curable coating composition at a volume ratio of the first and second reactive components from 0.8:1 to 1.2:1. 
     
     
         35 . The method of  claim 33 , wherein the applying step further comprises allowing the curable coating composition to at least partially cure at a temperature from 15.6 to 32.2° C. 
     
     
         36 . The method of  claim 33 , wherein the curable coating composition demonstrates a tack-free time of less than 5 minutes at a temperature from 20 to 25° C. 
     
     
         37 . The method of  claim 33 , wherein the rheology modifier comprises silica, the rheology modifier present in an amount from 0.5 to 6 percent by weight, based on a total weight of the curable coating composition. 
     
     
         38 . The method of  claim 33 , wherein the coating composition further comprises fibers ranging in length from 0.1 to 15.54 cm and having an aspect ratio of at least 5, the fibers present in the curable coating composition in an amount from 1 to 50 percent by weight, based on a total weight of the curable coating composition. 
     
     
         39 . The method of  claim 33 , wherein the curable coating composition further comprises at least one of:
 a third reactive component; and   one of the first and second reactive components comprising two types of chemical functional groups.   
     
     
         40 . The method of  claim 33 , wherein the first reactive component comprises an isocyanate functional compound and the second reactive component comprises an amine functional compound. 
     
     
         41 . The method of  claim 33 , wherein the first reactive component comprises a Michael addition donor functional compound and the second reactive component comprises a Michael addition acceptor functional compound. 
     
     
         42 . The method of  claim 33 , wherein the first reactive component comprises an alkenyl functional compound and the second reactive component comprises a thiol functional compound.