Water soluble copolymers prepared using phosphorus containing chain transfer agents
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United States of America Patent
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Aug 22, 2006
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N/A
app pub date -
Aug 22, 2003
filing date -
Mar 15, 2001
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Abstract
Processes for making acrylic acid/allyl ether copolymers are provided wherein hypo phosphorous acid and its salts are used as chain transfer agents during the polymerization process. The hypo phosphorous acid feed time is regulated in comparison to the feed time of the acrylic acid feed at a duration of about 0 75% hypo phosphorous acid feed:total acrylic acid feed time. Phosphorus containing copolymers made by the processes are also disclosed.
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