Low emission formaldehyde resin and binder for mineral fiber...

Details Low emission formaldehyde resin and binder for mineral fiber... Low emission formaldehyde resin and binder for mineral fiber...

C - Chemistry, Metallurgy

08

G

C08G 8/10 (2006.01) C08K 3/40 (2006.01) C08L 61/10 (2006.01) C09J 161/10 (2006.01)

Patent

CA 2634327

A phenol-formaldehyde resole resin is prepared using high level of catalyst at a polymerization temperature of about 63 degrees C. The endpoint, measured by salt water tolerance, is selected so that the resulting resin has a water dilutability of 20:1 at neutral pH after storage for three weeks at a temperature of about 13 degrees C, with a free phenol level of no more than 0.50 percent.

Un résol phénol/formaldéhyde est préparé en utilisant une forte teneur en catalyseur à une température de polymérisation d'environ 63 degrés C. Le point final, mesuré au moyen de la tolérance à l'eau salée, est choisi de manière à ce que la résine obtenue ait une capacité de dilution de 20/1 a pK neutre après entreposage pendant trois semaines à une température d'environ 13 degrés C, ce qui correspond à une teneur en phénol libre d'au plus 0,50 pour cent.

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