Process for producing urea-modified, highly reactive...

Details Process for producing urea-modified, highly reactive... Process for producing urea-modified, highly reactive...

C - Chemistry, Metallurgy

08

G

C08G 14/08 (2006.01) B27N 3/00 (2006.01) C08L 61/34 (2006.01) C08L 97/02 (2006.01) C08L 91/08 (2006.01)

Patent

CA 2151051

Urea-modified, highly reactive phenolic resins useful as center-layer bonding agents in the manufacture of particleboard are provided by condensing phenol and formaldehyde until shortly before gelation takes place such that, after addition of urea, relatively low-alkaline, urea-modified phenolic resins are obtained which may optionally be stored and to which, shortly before processing them into glues for center-layer particles, alkali is added in sufficient quantities to ensure rapid cross-linking of the phenolic resin.

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