文献类型：专利

英文题名：Comb type copolymer used for producing, pumping or storing coal aqueous slurry, comprises side chain grafted with naphthalene sulfonate

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

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN102492074-A

申请日：2011-11-24

公开日：2012-06-13

语种：英文

收录：DERWENT

摘要：NOVELTY - A comb type copolymer (I) comprises side chain grafted with naphthalene sulfonate. USE - A comb type copolymer for producing, pumping or storing coal aqueous slurry (claimed). ADVANTAGE - The copolymer has amidation degree of 0.4-1.3, reduces slurry viscosity, and improves fluidity and stability of the coal aqueous slurry. DETAILED DESCRIPTION - A comb type copolymer of formula (I) comprises side chain grafted with naphthalene sulfonate. m, n=7-24. An INDEPENDENT CLAIM is included for preparation of the copolymer comprising: (A) mixing maleic anhydride (42-50 mole%) and a first solvent to obtain solution A, dissolving styrene and a first initiator in a first solvent to obtain solution B, adding dropwise the solution B to the solution A, and heating the mixture at 60-110 degrees C for 1-5 hours in the presence of nitrogen to obtain binary copolymer having relative molecular weight of 2000-10000 g/ml; and (B) mixing obtained copolymer and a second solvent to obtain solution C, dissolving amidation reagent in a third solvent to obtain solution D, adding dropwise the solution D to solution C, and heating the mixture at 40-60 degrees C for 6-24 hours to obtain amidation grafted copolymer.