RU99109025A - Deposition of a cationic water-soluble polymer in saline solutions - Google Patents

Claims (11)

1. A method comprising mixing, in any order of water, at least one cationic water-soluble polymer, an effective amount of at least one kosmotropic salt and an effective amount of at least one chaotropic salt in order to obtain an aqueous composition containing at least one precipitated water-soluble polymer, where said chaotropic salt is present in an amount greater than 1% by weight, based on the weight of said cationic water-soluble polymer.  2. A process involving the polymerization of at least one cationic monomer in an aqueous solution consisting of an effective amount of at least one chaotropic salt and an effective amount of at least one kosmotropic salt in order to obtain an aqueous composition containing at least one precipitated water soluble polymer.  3. A method comprising mixing, in any order of water, at least one cationic water-soluble polymer, an effective amount of at least one kosmotropic salt and an effective amount of at least one anionic organic salt in order to obtain an aqueous composition containing at least , one precipitated water soluble polymer.  4. A method comprising polymerizing at least one cationic monomer in an aqueous solution consisting of an effective amount of at least one anionic organic salt and an effective amount of at least one kosmotropic salt in order to obtain an aqueous composition containing at least one precipitated water soluble polymer.  5. The method according to paragraphs. 1 to 3 or 4, where some or all of the mentioned precipitated cationic water-soluble polymers are precipitated as a polymer dispersion. 6. The method according to paragraphs. 1 to 4 or 5, where the above-mentioned precipitated cationic water-soluble polymer contains periodically repeating units having the formula

where R ₁ represents hydrogen, or CH ₃ , A represents an oxygen atom, or NH, B represents an alkylene or oxyalkylene group having from 1 to 5 carbon atoms, R ₂ and R ₃ each represents an alkyl group having from 1 up to 3 carbon atoms, R ₄ is an alkyl or substituted alkyl group having from 1 to 10 carbon atoms, or an aryl or substituted aryl group having from 6 to 10 carbon atoms, and X is an anionic counterion.  7. A composition containing water, at least one precipitated cationic water-soluble polymer, an effective amount of at least one kosmotropic salt and an effective amount of at least one chaotropic salt, where the said chaotropic salt is present in an amount greater than 1 weight. % based on the weight of the cationic water soluble polymer mentioned.  8. A composition containing water, at least one precipitated cationic water-soluble polymer, an effective amount of at least one kosmotropic salt and an effective amount of at least one anionic organic salt. 9. The composition according to claim 7 or 8, wherein said cationic water-soluble polymer contains periodically repeating units having the formula

where R ₁ represents hydrogen, or CH ₃ , A represents an oxygen atom, or NH, B represents an alkylene or oxyalkylene group having from 1 to 5 carbon atoms, R ₂ and R ₃ each represents an alkyl group having from 1 up to 3 carbon atoms, R ₄ is an alkyl or substituted alkyl group having from 1 to 10 carbon atoms, or an aryl or substituted aryl group having from 6 to 10 carbon atoms, and X is an anionic counterion.  10. A method for concentrating a dispersion of suspended solids, which comprises dewatering a dispersion of suspended solids by adding to the above dispersion an effective amount of a composition according to claims 7, 8 or 9.  11. The method of tillage, which includes adding to the soil soil conditioning amount of the composition according to claims. 7, 8 or 9.