Curable composition

Abstract

The present invention has its object to provide a liquid-applied moisture-permeable waterproofing material that can protect a building from rainwater or humidity in the air, can drain moisture, which has been gathered on a substrate of a building, and can be applied easily. The present invention is a curable composition comprising: (A) a polyoxyalkylene polymer having a silicon-containing group crosslinkable by forming a siloxane bond; (B) a polyoxyalkylene plasticizer whose main chain contains 5 wt % or more of an oxypropylene-derived repeating unit and has one or more groups, at an end thereof, selected from the group consisting of an —OH group, a group represented by the formula: —OR 9 (wherein R 9 is a substituted or unsubstituted C 1-20 hydrocarbon group), and a group represented by the formula: —NR 10 2 (wherein R 10 is each independently a hydrogen atom, or a substituted or unsubstituted C 1-20 hydrocarbon group).

1 . A moisture-permeable waterproofing material for a building comprising a cured product obtained by curing a curable composition comprising:
 (A) a polyoxyalkylene polymer having a silicon-containing group crosslinkable by forming a siloxane bond   wherein the polyoxyalkylene polymer is a polyoxypropylene polymer;   (B) a polyoxyalkylene plasticizer whose main chain contains 5 wt % or more of an oxypropylene-derived repeating unit and has one or more groups, at an end thereof, selected from the group consisting of an —OH group, a group represented by the formula (7):   —OR 9      (wherein R 9  is a substituted or unsubstituted C 1-20  hydrocarbon group),   and a group represented by the formula (8):   —NR 10   2      (wherein R 10  is each independently a hydrogen atom, or a substituted or unsubstituted C 1-20  hydrocarbon group),   said curable composition being liquid and being one of   (2) a curable composition being liquid and (II), wherein the component (B) is a polyoxyalkylene plasticizer (B2) that does not have an —NH 2  group at a molecular chain end, and contains a polyoxyalkylene (b2), the polyoxyalkylene (b2) having both an —OH group and a group represented by the formula (7) at a molecular chain end:   —OR 9      (wherein R 9  is a substituted or unsubstituted C 1-20  hydrocarbon group), and   wherein a ratio (WAB2/W) of a total weight (WAB2) of the component (A) and the component (B2) with respect to a total weight of the curable composition (W) is within the range of 35 to 80 wt %, and   (3) a curable composition (III), wherein the component (B) is a polyoxyalkylene plasticizer (B3) that does not have an —NH 2  group at a molecular chain end, and contains an ethylene oxide-propylene oxide copolymer (b3) having a molecular weight of 100 to 1500 and having an —OH group and/or a group represented by the formula (7) at a molecular chain end:   —OR 9      (wherein R 9  is a substituted or unsubstituted C 1-20  hydrocarbon group),   wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.4 perm·inch or more.   
     
     
         2 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the cured product is in a membrane form having a thickness of 0.005 to 0.05 inch.   
     
     
         3 . The moisture-permeable waterproofing material according to  claim 2 ,
 wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.6 perm·inch or more.   
     
     
         4 . The moisture-permeable waterproofing material according to  claim 2 ,
 wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.8 perm·inch or more.   
     
     
         5 . A liquid-applied moisture-permeable waterproofing method comprising:
 applying the moisture-permeable waterproofing material according to  claim 2  to a building.   
     
     
         6 . A liquid-applied moisture-permeable waterproofing method comprising:
 applying the moisture-permeable waterproofing material according to  claim 2  to a substrate of an exterior wall of a building.   
     
     
         7 . A liquid-applied moisture-permeable waterproofing method comprising:
 applying the moisture-permeable waterproofing material according to  claim 2  around an opening of a building.   
     
     
         8 . A liquid-applied moisture-permeable waterproofing method comprising:
 applying the moisture-permeable waterproofing material according to  claim 2  to a roof of a building.   
     
     
         9 . The moisture-permeable waterproofing material according to  claim 2 , which is for a substrate of an exterior wall of a building. 
     
     
         10 . The moisture-permeable waterproofing material according to  claim 2 , which is for areas around an opening of a building. 
     
     
         11 . The moisture-permeable waterproofing material according to  claim 2 , which is for a roof of a building. 
     
     
         12 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the polyoxyalkylene (b2) has a molecular weight of 100 to 4500.   
     
     
         13 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the polyoxyalkylene (b2) has a molecular weight of 200 to 450.   
     
     
         14 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the main chain of the polyoxyalkylene (b2) is a polyoxypropylene homopolymer (b6).   
     
     
         15 . The moisture-permeable waterproofing material according to  claim 13 ,
 wherein the main chain of the polyoxyalkylene (b2) is a polyoxypropylene homopolymer (b6).   
     
     
         16 . The moisture-permeable waterproofing material according to  claim 14 ,
 wherein the polyoxyalkylene plasticizer of the component (B2) further comprises an ethylene oxide-propylene oxide copolymer (b3) that has a molecular weight of 100 to 4500 and has an —OH group and/or a group represented by the formula at a molecular chain end:   —OR 9      (wherein R 9  is as defined in the preceding claims).   
     
     
         17 . The moisture-permeable waterproofing material according to  claim 16 ,
 wherein the ethylene oxide-propylene oxide copolymer (b3) has both an —OH group and a group represented by the formula (7) at a molecular chain end:   —OR 9      (wherein R 9  is as defined in the preceding claims).   
     
     
         18 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the ethylene oxide-propylene oxide copolymer (b3) has both an —OH group and a group represented by the formula (7) at a molecular chain end:   —OR 9      (wherein R 9  is as defined in the preceding claims).   
     
     
         19 . The moisture-permeable waterproofing material according to  claim 1 ,
 wherein the polyoxyalkylene plasticizer of the component (B3) further comprises a polyoxypropylene homopolymer (b7) having a molecular weight of 100 to 4500 and having an OH group at all molecular chain ends.   
     
     
         20 . The moisture-permeable waterproofing material according to  claim 1  wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.6 perm·inch or more. 
     
     
         21 . The moisture-permeable waterproofing material according to  claim 1  wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.8 perm·inch or more. 
     
     
         22 . The moisture-permeable waterproofing material according to  claim 1 , which is for a substrate of an exterior wall of a building. 
     
     
         23 . The moisture-permeable waterproofing material according to  claim 1 , which is for areas around an opening of a building. 
     
     
         24 . The moisture-permeable waterproofing material according to  claim 1  which is for a roof of a building.