| 摘要 |
Aqueous saline dispersions contain a salt, a dispersing polymer and a dispersed polymer. The dispersing polymer is prepared by copolymerization of a water soluble monomer (A), a hydrophobic monomer (B), and optionally an amphiphilic monomer (C). The saline dispersions contain 21 - 24% by weight of salt, 0.5 - 25% of polymeric dispersant, and 10 - 40% of dispersed polymer. The polymeric dispersant contains: (a) 15 - 99% of groups derived by polymerization of water soluble monomer (A) which is selected monomers of formula CH2=C(R1)C(O)Z1L (A1), monomers of formula CH2=C(R4)C(O)N(R5)(R6) (A2), monomers (A3) having a carboxylic function groups such as (meth)acrylic, or itaconic acid and their salts, and monomers (A4) having a quaternary ammonium function such as imidized or salified maleic anhydride or acryloxy ethyl trimethyl ammonium chloride, (b) 1 - 85% of groups derived from a hydrophobic monomer (B) and (c) 0 - 30% of an amphiphilic monomer (C). R1 = H or methyl; Z1 = O, NH, NR2; R2 = 1-6C alkyl or hydroxy alkyl; L = -R3-N-N(L1)(L2) or -R3-N<+)<L1)(L2)(L3).X<->; R3 = 1-6C alkyl or hydroxy alkyl; L1, L2, and L3 = H, 1-6C alkyl, 5-12C cycloalkyl, or 6-18C aryl or aralkyl; X = monovalent anion such as Cl or SNC; R4 = H or methyl; R5 and R6 = H, 1-6C alkyl or hydroxy alkyl, or 5 - 16C cycloalkyl.
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