Processes for wood treatment using mono- and bifunctional
perfluoropolyether compounds as additives in formulations for the wood
treatment, said perfluoropolyether compounds having the structures:
R.sub.f --O--CFY--L--W (C)
W--L--YFC--O--R.sub.f O--CFY--L--W (D)
wherein:
L is an organic group selected from --CH.sub.2 --(OCH.sub.2 CH.sub.2).sub.n
--, --CO--NR'--, with R'.dbd.H or C.sub.1 -C.sub.4 alkyl group; n=0-8;
Y.dbd.F, CF.sub.3 ;
W is selected from C.sub.1 -C.sub.50 alkyl groups, optionally containing
one or more ether O, C.sub.6 -C.sub.50 aryl groups, C.sub.7 -C.sub.50
alkyl-aryl or aryl-alkyl groups;
Rf is a perfluoropolyether radical.
