PHENOL RESIN, METHOD FOR PRODUCING, APPROPRIATING COMPOSITION FOR MINERAL FIBERS AND PRODUCED PRODUCTS

摘要

1. A liquid resin intended to be formulated with a sizing composition for mineral fibers, consisting essentially of phenol-formaldehyde and phenol-formaldehyde-amine condensates and having a water dilutability at 20 ° C of at least 1000%, different in that it contains free formaldehyde of 0.1% or less of the total liquid mass. ! 2. The resin according to claim 1, characterized in that it contains free phenol of 0.5% or less of the total liquid mass, preferably less than or equal to 0.4%. ! 3. The resin according to claim 1 or 2, characterized in that the amine is an alkanolamine or a cyclic amine. ! 4. The resin according to claim 3, characterized in that the amine is monoethanolamine or diethanolamine. !5. The resin according to claim 1, characterized in that it contains free formaldehyde of 0.1% or less, contains less than 0.4% phenol and has a water solubility greater than or equal to 2000%. ! 6. A method of producing a resin consisting essentially of phenol-formaldehyde and phenol-formaldehyde-amine condensates having a water dilutability at 20 ° C of at least 1000% and containing free formaldehyde of 0.1% or less of the total mass of liquid, including the implementation of the reaction of phenol with formaldehyde at a molar ratio of formaldehyde / phenol of more than 1 in the presence of a basic catalyst, cooling the reaction mixture and introducing into the above reaction mixture, while cooling the amine that interacts with free formaldehyde and phenol according to the Mannich reaction, characterized in that from the moment the amine is introduced, cooling is stopped and the reaction mixture is maintained at the temperature of introduction for a period of time, var