Efficacy of anhydrides as wood protection chemicals - II. Performance against soft rot fungi
S C Forster, M D C Hale, G R Williams
Pine sapwood modified with various anhydrides and with butyl isocyanate was tested for its resistance to soft rot decay. Small stakes were exposed for 20 months in unsterile soil in a fungal cellar test.
Wood modified with butyl isocyanate performed better than any of the anhydrides tested, with a threshold level of protection (less than 3% weight loss) at 12% weight percent gain (WPG). Stakes acetylated to 15% WPG did not give complete protection against soft rot.
Stakes modified with alkenyl succinic anhydride showed increasing resistance to soft rot with WPG up to about 10% WPG, above which no further improvements were evident. Succinic anhydride and phthalic anhydride treated stakes showed little or no noticeable protection.
Keywords: CHEMICAL MODIFICATION; DECAY RESISTANCE; SOFT ROT; ANHYDRIDE; BUTYL ISOCYANATE
Conference: 98-06-14/19 Maastricht, The Low Countries