The invention provides a composition and a method for improvement in froth flotation. Particularly the invention discloses a composition which comprises a slurry in a medium, at least one surfactant, and a reactant of at least one unsaturated carboxylic acid and at least one olefin polymer with modular weight of 400-10000 Daltons, wherein at least one unsaturated carboxylic acid is the unsaturated monocarboxylic acids selected from monocarboxylic acid, or acid anhydride, acyl halide, salt, acylamide or ester thereof; polybasic carboxylic acid, or acid anhydride, acyl halide, salt, acylamide or ester thereof, or blends of the components above.