Patent ID: 6875889

Claim:
Compounds having formula (I): in which: R 1 represents H or —CH 3 ; R 2 represents —CH 3 ; —C 2 H 5 ; —C 3 H 7 or —C 4 H 9 ; and compound (I) is optionally quaternised on one of the nitrogens, which is symbolised by the fact that the R 3 , X ⊖ and ⊕ associated with this nitrogen are shown between brackets; if compound (I) is quaternised on a single nitrogen, R 3 and X ⊖ have the following meanings: (1) R 3 represents —CH 3 or —CH 2 C 6 H 5 ; and X ⊖ represents Cl ⊖ or CH 3 OSO 3 ; or (2) R 3 represents a C 1 -C 12 -alkyl group; and X ⊖ represents Br ⊖ or I ⊖ ; if compound (I) is quaternised on both nitrogens, the two X ⊖ may be the same or different and the two R 3 may be the same, in which case: (3) R 3 represents a C 5 -C 12 -alkyl; and X ⊖ represents CH 3 OSO 3 ⊖ , Br ⊖ or I ⊖ ; or different, in which case: (4) one of the R 3 represents —CH 3 or —CH 2 C 6 H 5 ; and X ⊖ represents Cl ⊖ or CH 3 OSO 3 ⊖ ; and the other represents a C 5 -C 12 -alkyl group; and X ⊖ represents Br ⊖ or I ⊖ ; and mixtures of these compounds.