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

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 8/10 (2006.01) C03C 25/34 (2006.01) C08L 61/06 (2006.01) C08K 5/17 (2006.01) C08K 5/21 (2006.01)

Patent

CA 2368869

A phenol-formaldehyde resole resin is prepared using a 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.

La présente invention concerne une résine résol formophénolique préparée avec un taux élevé de catalyseur à une température de polymérisation d'environ 63· C. Le point final, mesuré par tolérance à l'eau salée, est sélectionné pour que la résine obtenue présente une dilution dans l'eau de 20:1 à un pH neutre après trois semaines de conservation à une température d'environ 13 ·C, avec un taux de phénol libre de 0,50 % maximum.

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