DISPERSANT FOR AQUEOUS SLURRY OF CARBONACEOUS SOLID AND AQUEOUS CARBONACEOUS SOLID SLURRY COMPOSITION INCORPORATING SAID DISPERSANT THEREIN

摘要

Dispersant (for carbonaceous solid-water slurries) is obtd. by polymerising the following monomers: (A) polyalkylene glycol mono(meth)acrylate monomer (0.1-7 mol.%) of formula (I) (B) sulphoalkyl(meth)acrylate monomer (5-94.9 mol.%) of formual (II), (C) unsatd. carboxylic acid monomer (5-94.9 mol.%) of formual (III) and (D) other monomers (0-20% mol.%). The sum of monomers (A), (B), (C), and (D) is 100 mol.%. The dispersant is a water-soluble copolymer and/or salt with an ave. mol. wt. of 1000-500,000 (prefd. 5000-300,000). where R1, R4, R6, R7 are each H or CH3, (R6, R7 can be -COOY but not at the same time); R2 is a 2-4C alkylene gp.; R3 is a 1-30C alkyl, alkenyl, aryl, etc. gp.; R5 is a 1-4C alkylene gp.; R8 is H, CH3, -COOY or -CH2COOY; X, Y are each H, alkali metal, alkaline earth metal, ammonium, amine.