Agent for fibers containing keratin, containing at least one specific amphiphilic cationic polymer and at least one additional film-forming cationic and/or stabilizing polymer

An agent for treating keratin-containing fibers comprising, in a cosmetically acceptable carrier:

• (a) at least one amphiphilic, cationic polymer having at least one structural unit of Formula (I), at least one structural unit of Formula (II), at least one structural unit of Formula (III) and at least one structural unit of Formula (IV),
• wherein
• R1 and R4 are, independently of one another, a hydrogen atom or a methyl group,
• X1 and X2 are, independently of one another, an oxygen atom or an NH group,
• A1 and A2 are, independently of one another, an ethane-1,2-diyl, propane-1,3-diyl or butane-1,4-diyl group,
• R2, R3, R5 and R6 are, independently of one another, a (C1 to C4) alkyl group, and
• R7 is a (C8 to C30) alkyl group, and
• (b) at least one additional film-forming cationic and/or setting cationic polymer having at least one structural unit of Formula (I), at least one structural unit of Formula (V) and at least one structural unit of Formula (VI)
• wherein
• R1 and R4 are, independently of one another, a hydrogen atom or a methyl group,
• A1 and A2 are, independently of one another, an ethane-1,2-diyl, propane-1,3-diyl or butane-1,4-diyl group,
• R2, R3, R5 and R6 are independently of one another, a (C1 to C4) alkyl group, and
• R7 is a (C8 to C30) alkyl group.