Polyurethane hybrid system combining high compressive strength and early water resistance

Abstract

A multi-component composition including A) a polyol component (A) including at least one polyol and water, B) a hardener component (B) including at least one polyisocyanate, and C) a solid component (C) including a hydraulic binder and one or more aggregates, as an early water resistant construction or repair material for constructing, repairing or refurbishing component parts, wherein the mixed and applied multi-component composition is immersed in water not later than 8 hours, preferably not later than 2 hours, after application. The use as an early water resistant construction or repair material is especially suitable for component parts, which are in contact with water during operation such as offshore wind energy plants or water retaining systems, e.g. pipelines.

1 . A multi-component composition comprising
 A) a polyol component (A) comprising at least one polyol and water,   B) a hardener component (B) comprising at least one polyisocyanate, and   C) a solid component (C) comprising a hydraulic binder and one or more aggregates   as an early water resistant construction or repair material for constructing, repairing or refurbishing component parts, wherein the mixed and applied multi-component composition is immersed in water not later than 8 hours after application.   
     
     
         2 . A multi-component composition according to  claim 1 , wherein the polyol component (A) comprises a castor oil as polyol and/or the hardener component (B) comprises a methylene diphenyl diisocyanate as polyisocyanate. 
     
     
         3 . A multi-component composition according to  claim 1 , wherein the component part is a component part which is in contact with water during operation. 
     
     
         4 . A multi-component composition according to  claim 1  , wherein the hydraulic binder comprises cement, calcined paper sludge or other hydraulic binder system. 
     
     
         5 . A multi-component composition according to  claim 1 , wherein the construction or repair material is a flooring material, a coating composition, a grout or a putty. 
     
     
         6 . A multi-component composition according to  claim 1 , for offshore applications, pipeline repair or lining applications. 
     
     
         7 . A multi-component composition according to  claim 1  wherein the component part is part of a wind energy plant, a water treatment plant, a dam, a sea wall or a water retaining system such as a water pipeline, a sewer or a pool, or a foundation. 
     
     
         8 . A multi-component composition according to  claim 1  for refurbishment, grouting, lock assembly or tightening of bushings or joints. 
     
     
         9 . A multi-component composition according to  claim 1 , wherein at least part of curing of the multi-component composition is carried out underwater. 
     
     
         10 . A multi-component composition according to  claim 1 , wherein the mixed and applied multi-component composition is immersed in water not later than 4 hours. 
     
     
         11 . A method for the construction, reparation or refurbishment of component parts by means of a multi-component composition comprising
 A) a polyol component (A) comprising at least one polyol and water,   B) a hardener component (B) comprising at least one polyisocyanate, and   C) a solid component (C) comprising a hydraulic binder and one or more aggregates,
 wherein the method comprises the steps of
 a) providing a space where the component part is to be constructed, repaired or refurbished so that the space is not in contact with water, 
 b) mixing components (A), (B) and (C) of the multi-component composition to provide a construction or repair material, 
 c) applying the construction or repair material on a desired location and in a desired shape within the space provided and initial curing of the construction or repair material to construct, repair or refurbish the component part, and 
 d) bringing the component part in contact with water so that the applied construction or repair material is immersed in water not later than 8 hours after application. 
 
   
     
     
         12 . The method according to  claim 11 , wherein the application of the construction material or repair material is by coating, flooring, grouting or puttying. 
     
     
         13 . The method according to  claim 11 , wherein at least part of curing of the construction or repair material is carried out underwater. 
     
     
         14 . The method according to  claim 11 , wherein the mixed and applied multi-component composition is immersed in water not later than 4 hours. 
     
     
         15 . The method according to  claim 11 , wherein the applied construction or repair material is immersed in water not earlier than 10 minutes after application.