Method of manufacturing light colored composite panels with...

Details Method of manufacturing light colored composite panels with... Method of manufacturing light colored composite panels with...

B - Operations, Transporting

27

N

B27N 7/00 (2006.01) B27N 1/00 (2006.01)

Patent

CA 2276891

A method is described for producing light colored composite panels by applying a buffer or weak acid system either in solution or in powder form prior to the hot press. The buffer or weak acid system, applied on the mat surfaces prior to hot pressing, reduces the pH of the environment on the mat surfaces and consequently reduces the degree of oxidation of the phenolic resin during hot pressing as well as retains the oxidized phenol formaldehyde polymers in their protonated forms after the hot press, thereby significantly reducing or eliminating the darkening of the finished composite panels.

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