Anti-fogging article and anti-fogging agent composition

Abstract

To provide an anti-fogging article having excellent anti-fogging performance and further having excellent durability, and an anti-fogging agent composition. An anti-fogging article comprising a substrate and a water-absorptive crosslinked resin layer formed on the surface of the substrate, wherein the water-absorptive crosslinked resin is a crosslinked resin with a saturated water absorption of at least 45 mg/cm 3 , or a water-absorptive crosslinked resin with a glass transition point of at least 50° C. as measured by a differential scanning calorimeter and further with a saturated water absorption of at least 45 mg/cm 3 .

1 . An anti-fogging article comprising a substrate and a water-absorptive crosslinked resin layer formed on the surface of the substrate, wherein the water-absorptive crosslinked resin is a crosslinked resin with a saturated water absorption of at least 45 mg/cm 3 , and which water-absorptive crosslinked resin is a resin obtainable by reacting a polyglycidyl ether compound, a curing agent and a coupling agent,
 wherein the polyglycidyl ether compound is at least one member selected from the group consisting of glycerol polyglycidyl ether, diglycerol polyglycidyl ether, polyglycerol polyglycidyl ethers and sorbitol polyglycidyl ether,   wherein the water-absorptive crosslinked resin layer has a thickness of from 5 to 30 μm, and   wherein the substrate comprises glass.   
     
     
         2 . The anti-fogging article according to  claim 1 , wherein the water-absorptive crosslinked resin has a water contact angle of its surface of at least 30°. 
     
     
         3 . The anti-fogging article according to  claim 1 , wherein the water-absorptive crosslinked resin has a glass transition point of at least 50° C. as measured by a differential scanning calorimeter. 
     
     
         4 . The anti-fogging article according to  claim 1 , wherein the water-absorptive crosslinked resin has a water contact angle of its surface of at least 30° and a saturated water absorption of at least 60 mg/cm 3 . 
     
     
         5 . The anti-fogging article according to  claim 1 , wherein the water-absorptive crosslinked resin layer is a resin layer formed by applying a liquid composition comprising a polyglycidyl ether compound, a curing agent and a solvent on the surface of the substrate, followed by drying and reacting. 
     
     
         6 . The anti-fogging article according to  claim 1 , which further comprises a hydrophobic layer on the surface of the crosslinked resin layer. 
     
     
         7 . The anti-fogging article according to  claim 1 , wherein the saturated water absorption is at least 60 mg/cm 3 . 
     
     
         8 . The anti-fogging article according to  claim 1 , wherein the saturated water absorption is from 75 to 185 mg/cm 3 . 
     
     
         9 . The anti-fogging article according to  claim 1 , wherein the saturated water absorption is from 90 to 155 mg/cm 3 . 
     
     
         10 . The anti-fogging article according to  claim 1 , wherein the crosslinked resin has a glass transition point is at least 90° C. 
     
     
         11 . The anti-fogging article according to  claim 1 , wherein the crosslinked resin has a glass transition point ranges from 50° C. to 200° C.