Full Idea
Kant, in his third critique, defined beauty in terms of a certain kind of disinterested pleasure;….this is the basis for a declaration of independence of the beautiful relative to the good.
Gist of Idea
Kant saw beauty as a sort of disinterested pleasure, which has become separate from the good
Source
report of Immanuel Kant (Critique of Judgement I: Aesthetic [1790]) by Charles Taylor - Sources of the Self §23.1
Book Reference
Taylor,Charles: 'Sources of the Self' [CUP 1992], p.423
A Reaction
This is a rebellion against the Greeks, especially Plato, and prepares the ground for the idea of 'art for art's sake'. Personally, I'm with Plato.