Products for coatings, insulation and packings, comprising industrial wastes and more particularly paper-making sludges and a process for obtaining same

Abstract From the Canadian patent

Novel products for coatings insulation and packings and their, processes of production are provided herein. These products are formed from paper-making sludges from decantation basins which contain a major amount, e.g. 70% of a mineral filler and a minor amount e.g. 30% of cellulose fibers. The composition comprises: 10-92% by weight of paper-making sludge; 3-75% by weight of an acrylic latex; 2-6% of a cross-linking agent for the acrylic latex, the cross-linking agent comprising a low molecular weight diamide and formaldehyde concentrate; and 5-70% of at least one of a mineral or organic filler. These compositions may be in the form of continuous sheets or molded panels, each of which may …