Phenolic resin, process for producing this resin, and resin composition for adhering mineral fibres.

摘要

Phenolic resin. The resin is liquid, contains phenol-formaldehyde, formaldehyde-urea and phenol-formaldehyde-amine condensates and has a free formaldehyde content lower than 3 %, the content being expressed as total weight of liquid, and a water-dilutability at 20 DEG C higher than or equal to 1000 %. In addition, the resin is heat-stable. Application to less contaminating sizing compositions for inorganic fibres; and use of the said fibres sized in this manner for the manufacture of insulating products and of out-of-soil cultivation substrates.