无磷三元共聚螯合分散剂的生产及应用探讨

Production and application of phosphorus-free ternary copolymer chelating dispersant

以烯丙基聚氧乙烯醚(APAG)、丙烯酸(AA)和2-甲基烯丙基磺酸钠(AS)为原料,通过自由基共聚制得不含磷的三元共聚物(AA-APAG-AS),因分子结构中引入了羧基、磺酸基、醚基等以及特性黏度低(0.06～0.07 dL/g)、数均分子质量小(2 500～3 500)、分子质量分布窄等,使其具有很好的分散力与螯合能力。

Phosphorus-free ternary copolymer (AA-APAG-AS) was prepared from allyl polyoxyethylene ether (APAG), acrylic acid (AA) and sodium 2-methylallyl sulfonate (AS) by free radical copolymerization. Due to the introduction of carboxyl, sulfonic and ether groups in the molecular structure, it had low intrinsic viscosi ty (0.06-0.07 dL/g), small number average molecular weight (2 500-3 500) and narrow molecular weight distri bution, which made it have good dispersion and chelating ability.