| 摘要 |
A method for controlling scale deposition from water containing scale forming impurities, which comprises: treating the water with at least about 0.5 part per million of a polymer of fumaric acid with from 0 to about 50 mole percent of at least one hydrophilic monomer selected from acrylamide, methacrylamide, acrylic acid, methacrylic acid or maleic anhydride and from 0 to about 15 mole percent of at least one ethylenically unsaturated, hydrophobic monomer, the average molecular weight of the polymer being from about 300 to about 10,000; processes for the production of said polymers; polymeric intermediates of mono or dialkyl fumarate, and processes for their production. |
