C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/5451
C08G 14/06 (2006.01) C08G 14/08 (2006.01) C08L 97/02 (2006.01) C09J 161/34 (2006.01)
Patent
CA 1315446
Abstract The invention relates to a method for the production of a resin which is used for manufacturing of an adhesive for cellulose based products, According to the method 30- 70 % by weight of a urea phenol resin with a molar ratio of 1.4 - 0.6 moles of urea, 0.006 - 0.3 moles of phenol and 0 - 0.04 moles of melamine per mole formaldehyde, are mixed with 70 - 30 % by weight of a melamine resin with a molar ratio formaldehyde : melamine of 1.7 - 2.4. The urea-phenol resin has been prepared by adding a cross-linking agent containing a co-condensate of phenol, formaldehyde and urea to a pre-condensate of formaldehyde, urea and optionally melamine and condensing under acid conditions. According to a further embodiment the cross-linking agent is added to a evaporated condensate of formaldehyde, urea and optionally melamine.
557261
Flodman Leif Algot
Gabrielsson Per Erik Georg
Dynobel A/s
Swabey Ogilvy Renault
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