POLYMER HAVING DISPERSING FUNCTION, OIL WELL CEMENT DISPERSANT, AND PREPARATION METHOD THEREFOR AND USE THEREOF

The present invention provides a polymer having a dispersing function, a preparation method therefor, and a use thereof as a cement dispersant. The polymer comprises a structural unit a, a structural unit b, a structural unit c and a structural unit d, wherein the structural unit a is provided by an...

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Bibliographische Detailangaben
Hauptverfasser:	WANG, Lishuang, LIU, Rengguang, XIAO, Jingnan, MIAO, Xia, ZHOU, Shiming, SANG, Laiyu, WEI, Haoguang, CHEN, Lei, LU, Peiqing, YANG, Guangguo, YANG, Hongqi, ZHANG, Jinkai, CHU, Yongtao
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES LIME, MAGNESIA MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	The present invention provides a polymer having a dispersing function, a preparation method therefor, and a use thereof as a cement dispersant. The polymer comprises a structural unit a, a structural unit b, a structural unit c and a structural unit d, wherein the structural unit a is provided by an unsaturated polyether and/or polyester, the structural unit b is provided by an unsaturated carboxylic acid or an anhydride or salt thereof, the structural unit c is provided by a silane and/or siloxane containing a polymerizable group, and the structural unit d is provided by an unsaturated sulfonic acid or a salt thereof; the molar ratio of the structural unit a to the structural unit d is 1:(5-15), preferably 1:(6-10), and the polymer has a weight average molecular weight of 20,000 to 120,000. The polymer of the present invention is used as an oil well cement dispersant; in use, the dispersant can not only solve the fluidity of cement slurry, but also improve the sedimentation stability of the slurry; in addition to good compatibility with additives, the dispersant also exhibit desirable compatibility and dispersibility for additive materials such as micro-silicon and latex; the dispersant is suitable for use in medium- and low-temperature well cementing projects, and greatly meets the actual requirements for oil well cement dispersants.