tant containing an amine functional group; (v) a (meth)allyl ether of formula CH2???CR1CH2OAmBnApR2 in which R1 is a hydrogen atom or a methyl group; A is a propyleneoxy or butyleneoxy group; B is ethyleneoxy; n is equal to zero or an integer less than or equal to 200, for example less than 100; m and p are zero or an integer less than n; R2 is a hydrophobic group of at least 8 carbon atoms, for e