| abstract |
The present invention relates to a sizing composition for mineral fibers, especially glass fibers or rock fibers, containing a liquid phenolic resin having a free formaldehyde content of less than or equal to 0.1% by total weight of liquid and an extender. The liquid phenolic resin is preferably mainly composed of condensates of phenol-formaldehyde and of phenol-formaldehyde-amine and has a water dilutability, at 20°C, at least equal to 1000%. Another subject of the invention is the insulating products based on mineral fibers treated with said sizing composition. |