LOW MOLECULAR MASS, PHOSPHORUS-CONTAINING POLYACRYLIC ACIDS AND USE THEREOF AS SCALE INHIBITORS IN WATER-CARRYING SYSTEMS

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专利权人:

BASF SE

发明人:

DETERING, Jürgen,URTEL, Bolette,NIED, Stephan,HEINTZ, Ewald

申请号：

EP20120701528

公开号：

EP2670523(B1)

申请日:

2012.02.01

申请国别(地区):

欧洲专利局

年份:

2017

代理人:

摘要：

The invention relates to an aqueous solution of acrylic acid polymers obtainable by polymerizing acrylic acid in feed mode with peroxodisulphate as initiator in the presence of hypophosphite in water as solvent, where (i) water and optionally one or more ethylenically unsaturated comonomers are introduced initially, and (ii) acrylic acid in acidic, non-neutralized form, optionally one or more ethylenically unsaturated comonomers, aqueous peroxodisulphate solution and aqueous hypophosphite solution are added continuously, and (iii) after the end of the acrylic acid feed, a base is added to the aqueous solution, the comonomer content not exceeding 30% by weight, based on the total monomer content.

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