Copolymer Containing Acid Building Blocks and Various Types of Polyether Building Blocks

摘要

The invention relates to a copolymer comprising i) 3 to 40 mol % of an isoprenolpolyether derivative structural unit α ii) 3 to 40 mol % of a vinyloxypolyether derivative structural unit &bgr; and iii) 35 to 93 mol % of an acid structural unit γ, the structural units of the copolymer which belong to the vinyloxypolyether derivative structural unit &bgr; having longer side chains than the structural units which belong to the isoprenolpolyether derivative structural unit α.