A ternary copolymer which comprises (a) unit of a polyoxyalkylene alkenyl ether, (b) unit of alkenylsulfonic acid, and (c) unit of a maleic acid compound as essential monomer units; contains essential monomer units (a), (b) and (c) in amounts satisfying a relation: (a) + (b)} : (c) = 3 : 7 to 7 : 3 by mol, and a relation: (a) : (b) = 1 : 5 to 99 : 1 by mol; and has a weight-average molecular weight of 500 to 100,000.
The copolymer is stable against hydrolysis and useful as a macromolecular surfactant.
(a)+(b)}:(c)=3:7 至 7:3(以摩尔计),以及(a):(b)=1:5 至 99:1(以摩尔计);重量平均分子量为 500 至 100,000。
该共聚物对
水解稳定,可用作高分子表面活性剂。