Composition containing a block copolymer and a specfic non-volatile oil

A composition comprising:

• a) one block ethylenic copolymer comprising at least a first block having a glass transition temperature (Tg) of greater than or equal to 40° C. and being completely or partially derived from one or more first monomers, which are such that the homopolymer prepared from these monomers has a glass transition temperature of greater than or equal to 40° C., and at least one second block having a glass transition temperature of less than or equal to 20° C. and being completely or partially derived from one or more second monomers, which are such that the homopolymer prepared from these monomers has a glass transition temperature of less than or equal to 20° C., said first block and said second block being linked together via a random intermediate segment comprising at least one of said first constituent monomers of the first block and at least one of said second constituent monomers of the second block, and said block copolymer having a polydispersity index I of greater than 2,
• b) a hydrocarbon-based non-volatile oil characterized by a Hansen solubility parameter δa ranging from 2 to 7 (J/cm3)1/2 and a molecular mass of less than or equal to 300 g/mol, and
• c) a volatile oil.