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 isoprenol polyether derivative structural unitα, ii) 3 to 40 mol % of a vinyloxy polyether derivative structural unitβand iii) 35 to 93 mol % of an acid structural unitγ, wherein the structural unit of the copolymer which belongs to the vinyloxy polyether derivative structural unitβhas longer side chains than the structural units which belong to the isoprenol polyether derivative structural unitα.