SYNTHESIS RESEARCH OF NEW POLYETHER POLYCARBOXYLATE SUPERPLASTICIZER

摘要

@@At present, the ecumenic polycarboxylate superplasticizer was produced by acopolymerization reaction under a certain temperature from some olefin unsaturatedmonomers and the polyethylene glycol unsaturated carboxylic acid esters, which wereprepared by the esterification reaction of polyethylene glycol with the over-dosagedunsaturated carboxylic acid. But, because the present domestic product craft for unsaturatedcarboxylic acid esters is not mature, to engender certain influence to the industrializationmanufacture. Further more, the mass fluctuation from the unsaturated carboxylic acid estersextremely influenced the next step copolymerization reaction, so its industrializationproduction need further strengthens. In recent years, the polyether polycarboxylate superplasticizer became one of luminescentspots in polycarboxylate superplasticizer synthesis research area. Because the big monomer ofallyl alcohol polyethylene glycol covers the active unsaturated duplet chemical bond, thesynthesis of polycarboxylate superplasticizer may realize with a comparatively simpler craft.This article digests the domestic and foreign correlation research results, combines responseactiveness and the characteristic from the big monomer of allyl alcohol polyethylene glycol,carries through the massive synthesis research, so obtained unprecedented progress on thesynthesis technical of the polycarboxylate superplasticizer with the basis radicalpolymerization response principle.