公开(公告)号：US20160046515A1

公开(公告)日：2016-02-18

申请号：US14778846

申请日：2014-03-18

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Ikuko NISHIDA

IPC: C02F5/10 ,  C08F222/10 ,  C02F1/44

CPC classification number: C02F5/10 ,  B01D61/04 ,  B01D65/08 ,  B01D2321/162 ,  B01D2321/168 ,  C02F1/441 ,  C02F2101/14 ,  C02F2103/023 ,  C02F2303/22 ,  C08F222/02 ,  C08F222/10 ,  Y02W10/37 ,  C08F2220/1808 ,  C08F218/08

Abstract: An object of the invention is to provide a method for preventing scale deposition that can prevent deposition of calcium fluoride scale without increasing phosphorus concentration in a fluorine-containing water system. Provided is a method for preventing scale deposition comprising adding a phosphorus-free maleic acid/ethyl acrylate/vinyl acetate copolymer to a fluorine-containing water system. The phosphorus-free copolymer is preferably a polymer obtained by copolymerization of monomer components containing maleic acid at a rate of 60 mol % or more, ethyl acrylate, and vinyl acetate. It preferably has a weight-average molecular weight of 500 to 5000.

Abstract translation: 本发明的目的是提供一种防止在含氟水体系中不增加磷浓度的氟化钙垢的沉积的防垢垢的方法。 本发明提供一种防止水垢沉积的方法，包括向含氟水体系中加入无磷马来酸/丙烯酸乙酯/乙酸乙烯酯共聚物。 无磷共聚物优选为以60摩尔％以上的含有马来酸的单体成分，丙烯酸乙酯和乙酸乙烯酯共聚得到的聚合物。 优选其重均分子量为500〜5000。