文献类型：专利

英文题名：Side chain grafted polyfunctional comb type copolymer useful in high-concentration coal-water-slurry additive, and water coal-slurry pumping and the storage of additive

作者：FANG D;XU J;GUO X;LI L;HUANG J;WANG M

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN102936314-A

申请日：2012-12-04

公开日：2013-02-20

语种：英文

收录：DERWENT

摘要：NOVELTY - Side chain grafted polyfunctional comb type copolymer, is claimed, where the polyfunction is polyethoxy and naphthalene sulfonic acid group. USE - (I) is useful in high-concentration coal-water-slurry additive, and watercoal-slurry pumping and the storage of additive (claimed). ADVANTAGE - (I) greatly improves the fluidity and stability of the water coal slurry. DETAILED DESCRIPTION - Side chain grafted polyfunctional comb type copolymer of formula (I), is claimed, where the polyfunction is polyethoxy and naphthalene sulfonic acid group. m, n = 7-24; k = 4-20; and R = H, alkyl, aryl, a hetero atom-substituted alkyl groups or substituted aryl. An INDEPENDENT CLAIM is included for preparing (I) comprising adding 10000 g/mole of styrene-maleic anhydride copolymer and solvent into a reaction container at 2000 degrees C, stirring the mixture to fully dissolve, slowly adding the solution into a reaction vessel using a constant voltage dropping liquid funnel, adding esterification reagent into the mixture, performing an esterification reaction to the mixture at 60-120 degrees C for 2-16 hours, and adding amidation agent and 1-1.5% of sodium hydroxide solution into the reacted solution using the constant voltage dropping liquid funnel to react at 40-120 degrees C for 2-8 hours, where: the mole ratio of the styrene-maleic anhydride copolymer to solvent is 0.02-0.05:1; the mole ratio of the esterification reagent to the styrene-maleic anhydride copolymer of maleic anhydride monomer is 0.2-2.5:1 and the mole ratio of the amide reagent to the styrene-maleic anhydride copolymer maleic anhydride monomer is 0.2-2:1; the solvent is acetone, tetrahydrofuran, dimethyl sulfoxide or dimethyl formamide; the esterification reagent is polyethylene glycol, fatty alcohol-polyoxyethylene ether or alkyl phenol polyoxyethylene ether; the catalyst is p-toluene sulfonic acid, methyl sulfonic acid or 4-dimethylamino pyridine; and the amidation agent is naphthylamine sulfonic acid.