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.
Claims17
A method of reducing the formaldehyde emission of a mineral fiber product bonded with a urea-modified phenol-formaldehyde resol resin binder composition, wherein the method 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, and wherein
- urea is used in an amount of from 20 to 60 wt %, based on total dry solids of the phenol-formaldehyde resol resin and urea, and
- dextrose is used in an amount of from 30 to 70 wt %, based on total dry solids of urea-modified phenol-formaldehyde resol resin and dextrose,
- and wherein the binder composition has a solids content of from 1 to 20 wt %.
Dependencies are inferred from the claim text.