Mat of polymer fibers containing a dihydrazide and use thereof

Abstract

The present invention relates to a mat of polymer fibers capable of trapping formaldehyde which contains at least one dihydrazide. Another subject of the invention is the use of said mat, in particular as a surface covering for thermal and/or sound insulation products, in particular based on mineral wool, polystyrene or on an organic or inorganic foam.

1 . A mat of polymer fibers, comprising a dihydrazide. 
     
     
         2 . The mat of  claim 1 , wherein the dihydrazide has formula (I):
   H 2 N—NH—R—CO—NH—NH 2  
   
       wherein R represents is:
 a linear or branched alkylene radical, optionally substituted with a hydroxyl radical; or 
 an arylene radical optionally substituted by with a hydroxyl radical, a halogen atom, or a linear or branched alkyl radical comprising 1 to 4 carbon atoms. 
 
     
     
         3 . The mat of  claim 2 , wherein, in formula (I) R is a C 1 -C 12  alkylene radical. 
     
     
         4 . The mat of  claim 3 , wherein the dihydrazide is adipic acid dihydrazide. 
     
     
         5 . The mat of  claim 1 , wherein the amount of dihydrazide is from 0.1 to 50% of the weight of the mat. 
     
     
         6 . The mat of  claim 1 , further comprising an anionic, cationic, or nonionic surfactant. 
     
     
         7 . The mat of  claim 6 , wherein the surfactant is less than 90% of the weight of the dihydrazide. 
     
     
         8 . The mat of  claim 1 , wherein the polymer fibers comprise an organic polymer. 
     
     
         9 . The mat of  claim 8 , wherein the organic polymer is a polyolefin, a polyvinyl acetate, a polyvinyl alcohol, a polylactic acid, an acrylonitrile, a polyoxyalkylene, a polyoxyphenylene, a polyacrylic, a polyacrylate, a polyester, a polyamide, a polyimide, a chlorinated and/or fluorinated polymer, a polysulfone, a polyurethane, a polybenzimidazol; or an aramid. 
     
     
         10 . The mat of  claim 9 , wherein the organic polymer is a polyester. 
     
     
         11 . The mat of  claim 1 , having a surface density in a range from 5 to 1000 g/m 2 . 
     
     
         12 . The mat of  claim 1 , further comprising a binder comprising a polymer capable of binding the fibers, of the same nature or of a different nature to the polymer of the fibers. 
     
     
         13 . The mat of  claim 12 , wherein the polymer capable of binding the fibers is a thermoplastic, thermosetting or elastomeric polymer, or a biopolymer. 
     
     
         14 . The mat of  claim 12 , wherein the binder is 5 to 300% by weight of the mat of polymer fibers. 
     
     
         15 . A covering, comprising the mat of  claim 1 . 
     
     
         16 . A surface or sealing covering, comprising the mat of  claim 1 . 
     
     
         17 . A thermal and/or sound insulation product, comprising a surface covering comprising the mat of  claim 1 . 
     
     
         18 . The mat of  claim 1 , wherein the amount of dihydrazide is from 0.2 to 20% of the weight of the mat. 
     
     
         19 . The mat of  claim 1 , wherein the amount of dihydrazide is from 0.3 to 10% of the weight of the mat. 
     
     
         20 . The mat of  claim 6 , wherein the surfactant is from 20 to 80% of the weight of the dihydrazide.