Manufacture of chipboard

摘要

The invention concerns the production of particle board with a very substantially lowered formaldehyde emission as well as suitable binding agents. According to the invention the binding agent used in the production of the board is a combination of a polyisocyanate with a aminoplast resin containing 0.25 to 0.625 moles of formaldehyde per mole equivalent of aminogroups. The particle boards thus obtained possess satisfactory mechanical properties and a strongly reduced formaldehyde emission.