Aqueous lacquer for treating keratin substances, packaged in an aerosol device and comprising at least one grafted silicone polymer, and uses thereof

A non-therapeutic process for maintaining and/or shaping hair and/or for conditioning hair, comprising applying to said hair a composition comprising:

• (a) at least one grafted silicone polymer selected from (1) a polymer containing a non-silicone organic skeleton grafted with monomers containing a polysiloxane, and (2) a polymer containing a polysiloxane skeleton grafted with non-silicone organic monomers, provided that the composition does not contain both grafted silicone polymer (1) and grafted slicone polymer (2);
• (b) at least 30% by weight of water;
• (c) at least one propellant;
• and
• (d) at least one organic solvent in an amount ranging from 0 to 25% by weight;
• wherein the weight percentages are relative to the total weight of said composition, and further wherein said composition is packaged in an aerosol device;
• and provided that the at least one grafted silicone polymer is formed from a monomer mixture comprising a polysiloxane macromer other than that of formula V:
• in which n is a number ranging from 5 to 700.