High molecular weight cationic polymers, preparation method and uses thereof
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United States of America Patent
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Issued Date -
Feb 12, 2004
app pub date -
Aug 5, 2003
filing date -
Jul 27, 2000
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Abandoned
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Abstract
This invention relates to a process for preparation of cationic polymers of high molecular weight based on salts of diallyl dialkyl ammonium, in the form of beads, by the method of reverse suspension polymerization. This process makes use of a monomer or mixture of monomers of diallyl dialkyl ammonium in a concentration ranging from 67 to 77 percent, preferably from 68 to 72 percent, by weight of active matter. The process makes it possible to polymerize monomers of this type without development of a specific stabilizing system, without seeded polymerization, even without addition of surfactants to the formulation, without distillation in certain important cases, and avoiding any risk of caking. The invention also relates to the polymers obtained and their applications in industry, particularly in the papermaking industry, water treatment processes, the mining industry, the cosmetics industry, the textile industry, and generally speaking in all industrial coagulation/flocculation methods.
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