METHOD FOR THE MANUFACTURE OF MINERAL WOOL PRODUCTS WITH A PHENOL-FORMALDEHYDE RESOLE BASED BINDER

• Main Authors: QUEROL PINOT, MIREIA, CASADO DOMINGUEZ, ARTURO LUIS, AZNAR ECIJA, ANA ISABEL, MOLINERO ARENAS, ALEJANDRO
• Format: Patent
• Language: English; French
• Published: 03.05.2018
• Subjects: BRAIDING; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS BASED THEREON; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; KNITTING; LACE-MAKING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; MINERAL OR SLAG WOOL; NON-WOVEN FABRICS; ORGANIC MACROMOLECULAR COMPOUNDS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRIMMINGS; WADDING

The invention relates to a method for the manufacture of mineral wool, comprising reacting an aqueous phenolformaldehyde resole with free formaldehyde with a first amount of urea, thereby preparing a prereact; contacting the prereact with a second amount of urea; applying the resulting mixture of prereact and second amount of urea, as part of a binder, optionally with additives, to the surface of mineral fibers; and curing the binder on the surface of the mineral fibers. The total amount of urea used ranges 10-40 wt.% relative to the sum of the dry weight of the phenolformaldehyde resole and the total amount of urea, and the second amount of urea used is at least 40 wt.-% of the total amount of urea. The invention also relates to a mineral wool product with reduced emissions of formaldehyde obtained by the method.