Phenol-formaldehyde resins, method for the production...

Details Phenol-formaldehyde resins, method for the production... Phenol-formaldehyde resins, method for the production...

C - Chemistry, Metallurgy

08

G

C08G 14/04 (2006.01) C08G 6/02 (2006.01) C08G 8/10 (2006.01) C08G 8/28 (2006.01)

Patent

CA 2681794

The invention relates to phenol-formaldehyde resins, which can be obtained by the alkalinically catalyzed condensation of phenol and formaldehyde in the presence of at least one salt of inorganic acids, and neutralization following the condensation by means of an inorganic or organic acid. The production takes place by adding at least one compound of the formula R1-(CH2)n-R2 (1), wherein R1, R2 independently from each other are -C(O)R, -COOR, -CN or -NO2, wherein R is H or CH3, and n has the value of 1 or 2. Furthermore, the invention particularly relates to the production of said resins and the use thereof as binders for insulating products on mineral fiber basis.

L'invention concerne des résines phénol-formaldéhyde qui peuvent être obtenues par condensation à catalysation alcaline de phénol et de formaldéhyde en présence d'au moins un sel d'acides inorganiques, la condensation étant suivie d'une neutralisation au moyen d'un acide inorganique ou organique. La fabrication s'effectue avec addition d'au moins un composé de formule R1-(CH2)n-R2 (1), où R1, R2 représentent indépendamment entre eux -C(O)R, -COOR, -CN ou -NO2, avec R signifiant H ou CH3, et où n est égal à 1 ou à 2. L'invention concerne en outre notamment la fabrication de telles résines, et leur utilisation comme liant pour des produits isolants à base de fibres minérales.

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