Thermosetting phenol-formaldehyde resins, manufacture and...

Details Thermosetting phenol-formaldehyde resins, manufacture and... Thermosetting phenol-formaldehyde resins, manufacture and...

C - Chemistry, Metallurgy

08

G

402/53

C08G 8/10 (2006.01)

Patent

CA 1054292

THERMOSETTING PHENOL-FORMALDEHYDE RESINS, MANUFACTURE AND USES THEREOF ABSTRACT OF THE DISCLOSURE Thermosetting phenol-formaldehyde resins useful as adhesives are produced by a novel procedure involving reaction of the phenol and formaldehyde in an aqueous system containing a metal carboxylate catalyst, in which a single step is used wholly at a temperature above about 90°C up to the reflux temp- erature of the system. The total reactant concentration is preferably from about 52 to 56%, which also achieves excellent phase separation of resin from the aqueous medium. Preferably the mole ratio of formaldehyde to phenol is above 1.7:1.

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