Self-crosslinking aqueous polystyrene-butadiene dispersions for consolidating bituminizable nonwovens and also consolidated nonwovens

Abstract

Self-crosslinking aqueous polymer dispersions which are suitable for consolidating nonwovens, which may be subsequently bituminized.

1 . A self-crosslinking aqueous polymer dispersion suitable for consolidating bituminizable nonwovens, comprising the following polymerized monomer units: 
 1) 20 to 55 parts, based on the dry mass of the disperse phase, of at least one conjugated diene,    2) 30 to 80 parts, based on the dry mass of the disperse phase, of at least one copolymerizable aromatic vinyl compound,    3) 0.1 to 10 parts, based on the dry mass of the disperse phase, of at least one polymerizable organic carboxylic acid and/or anhydride,    4) 1 to 10 parts of at least one crosslinker,    5) 0 to 20 parts, based on the dry mass of the disperse phase, of at least one derivative of an α,β-unsaturated carboxylic acid    
     
     
         2 . The dispersion of    claim 1   , wherein 1) comprises at least one monomer unit selected from the group of monomers consisting of 1,3-butadiene, isoprene, chloroisoprene and 2,3-dimethylbutadiene.  
     
     
         3 . The dispersion of    claim 1   , wherein 2) comprises at least one monomer unit selected from the group of monomers consisting of styrene, methylstyrene and styrene carboxylic acid.  
     
     
         4 . The dispersion of    claim 1   , wherein 3) in the dispersion comprises at least one monomer unit selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid and fumaric acid.  
     
     
         5 . The dispersion of    claim 1   , wherein 4) comprises at least one monomer selected from the group consisting of N-methylolacrylamide, N-methoxymethylacrylamide, N-hydroxymethylacrylamide, N-methylolmethacrylamide, N-methoxymethylmethacrylamide and N-hydroxymethylmethacrylamide.  
     
     
         6 . The dispersion of    claim 1   , wherein 5) comprises at least one monomer selected from the group consisting of acrylamide, methacrylamide, acrylonitrile and methacrylonitrile.  
     
     
         7 . The dispersion of    claim 1   , wherein 1) comprises 1,3-butadiene and 2) comprises styrene.  
     
     
         8 . A consolidated nonwoven consolidated using a self-crosslinking aqueous polymer dispersion, composed of the following monomer components: 
 1) 20 to 55 parts, based on the dry mass of the disperse phase, of at least one conjugated diene,    2) 30 to 80 parts, based on the dry mass of the disperse phase, of at least one copolymerizable aromatic vinyl compound,    3) 0.1 to 10 parts, based on the dry mass of the disperse phase, of at least one polymerizable organic carboxylic acid and/or anhydride,    4) 1 to 10 parts of at least one crosslinker,    5) 0 to 20 parts, based on the dry mass of the disperse phase, of at least one derivative of an α,β-unsaturated carboxylic acid.    
     
     
         9 . The consolidated nonwoven of    claim 8   , wherein 1) in comprises at least one monomer selected from the group of monomers consisting of 1,3-butadiene, isoprene, chloroisoprene and 2,3-dimethylbutadiene.  
     
     
         10 . The consolidated nonwoven of    claim 8   , wherein 2) comprises at least one monomer selected from the group consisting of styrene, methylstyrene and styrene carboxylic acid.  
     
     
         11 . The consolidated nonwoven of    claim 8   , wherein 3) comprises at least one monomer unit selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid and fumaric acid.  
     
     
         12 . The consolidated nonwoven of    claim 8   , wherein 4) comprises at least one monomer unit selected from the group consisting of N -methylolacrylamide , N-methoxymethyl acrylamide, N-hydroxymethylacrylamide, N-methylolmethacrylamide, N-methoxymethylmethacrylamide and N-hydroxymethylmethacrylamide.  
     
     
         13 . The consolidated nonwoven of    claim 8   , wherein 5) comprises at least one monomer unit selected from the group consisting of acrylamide, methacrylamide, acrylonitrile and methacrylonitrile.  
     
     
         14 . The consolidated nonwoven of    claim 8   , wherein the nonwovens used are composed of glass, polymers and natural products and also their hybrid constructions, especially from raw felt, woven jute fabric, glass mat, mixed glass fiber cloth and polyester.  
     
     
         15 . The consolidated nonwoven of    claim 14   , wherein the nonwovens used are polyester spunbondeds or polyester staple fiber webs.  
     
     
         16 . A method of producing the consolidated nonwoven of    claim 8   , comprising impregnating the nonwoven with said aqueous polymer dispersion followed by curing the polymer.  
     
     
         17 . A method of producing aqueous polymer dispersion of    claim 1    comprising polymerizing the following monomers in water: 
 1) 20 to 55 parts, based on the dry mass of the disperse phase, of at least one conjugated diene,  
 2) 30 to 80 parts, based on the dry mass of the disperse phase, of at least one copolymerizable aromatic vinyl compound,  
 3) 0.1 to 10 parts, based on the dry mass of the disperse phase, of at least one polymerizable organic carboxylic acid and/or anhydride,  
 4) 1 to 10 parts of at least one crosslinker,  
 5) 0 to 20 parts, based on the dry mass of the disperse phase, of at least one derivative of an α,β-unsaturated carboxylic acid