| abstract |
The present invention relates to an aqueous binding composition comprising: a) at least one reducing sugar; b) ammonium sulphamate and/or sulphamate of an alkaline or alkaline-earth metal; c) a pH- adjusting agent selected from the group consisting of ammonium hydroxide (NH4OH), an organic and/or inorganic ammonium salt and/or an organic amine; and a resin (or pre-condensate) obtained by reaction between a polyaldehyde, a urea compound and at least one lignin sulphonate and/or a condensation derivate thereof with a polyaldehyde, said resin being present in a percentage of at least 10% by weight on the dry weight of the composition. Said binder may be efficiently used to bind cotton fibres, cellulose fibres, organic tissues, coal dust, natural and artificial inorganic fibres, thereby obtaining products with high mechanical properties. |