Acrylic acid polymers
Abstract
Abstract WATER-SOLUBLE COPOLYMERS OF 30 TO 95 PERCENT BY WEIGHT OF ACRYLIC ACID WITH FROM 70 TO 5 PERCENT WEIGHT OF ACRYLAMIDE WITH OR WITHOUT ADDITIONAL DILUENT COMONOMERS ARE PREPARED IN THE FORM OF FLUID, POURABLE, AQUEOUS, SUSPENSIONS OF POLYMER SOLIDS BY CARRYING OUT THE POLYMERIZATION AT A TEMPERATURE OF FROM JUST ABOVE THE FREEZING POINT OF THE REACTION MIXTURE OF ABOUT 60*C. IN A SOLUTION OF THE MONOMERS IN AN AQUEOUS INORGANIC SALT SOLUTION AT A PH OF FROM ABOUT 1 TO ABOUT 3.2 WITH AGITATION SUFFICIENT TO MAINTAIN PRECIPITATED COPOLYMER IN SUSPENSION. SAID SALT SOLUTION CONTAINS A PREDETERMINED CONCENTRATION OF ALKALI METAL OR AMMONIUM SALT OF STRONG INORGANIC ACID IN THE RANGE OF FROM ABOUT 0.1 PERCENT TO 10 PERCENT BY WEIGHT OF THE REACTION MIXTURE, THE CONCENTRATION OF SALT BEING ADJUSTED TO PRECIPITATE HIGH MOLECULAR WEIGHT COPOLYMER OF THE COMPOSITION EMPLOYED UNDER THE PARTICULAR REACTION CONDITIONS OF A SPECIFIC POLYMERIZATION. THE COPOLYMERS SO PREPARED CAN BE READILY DISSOLVED IN WATER, ARE OF HIGH MOLECULAR WEIGHT AND ARE PARTICULARLY USEFUL AS FLOCCULANTS TO IMPROVE THE RATE OF RAW SEWAGE SOLIDS AND OF A VARIETY OF MINERAL SOLIDS.
Inventors
- 👤 Henry Volk
- 👤 Percy J Hamlin
Bibliographic Details
Claims Analysis
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