Method of reducing the formaldehyde emission of a mineral fiber product, and mineral fiber product with reduced formaldehyde emission
AssigneeRockwool A/S
InventorsErling Lennart HANSEN, Lars NAERUM, Povl NISSEN
Life of this patent
Estimating the term…
Abstract
A method of reducing the formaldehyde emission of a mineral fiber product bonded with a urea-modified phenol-formaldehyde resol resin-type binder comprises adding dextrose to the binder composition during and/or after preparation of the binder composition but before curing of the binder composition applied to the mineral fibers.
Claims20
A binder composition, wherein the binder composition is curable, in a cured state suitable for binding mineral fibers to form a mineral fiber product, and comprises a phenol-formaldehyde resol resin, urea and dextrose, the binder composition having a solids content of from 1 to 20 wt % and comprising (i) urea in an amount of from 20 to 60 wt %, based on total dry solids of the phenol-formaldehyde resol resin and urea, and (ii) dextrose in an amount of from 30 to 70 wt %, based on total dry solids of urea-modified phenol-formaldehyde resol resin and dextrose.
Dependencies are inferred from the claim text.