The invention discloses cis-
butenedioic acid di-2-ethylhexyl ester, a method for synthesizing the same and application of the cis-
butenedioic acid di-2-ethylhexyl ester to preparing polycarboxylic
acid water reducing agents. The cis-
butenedioic acid di-2-ethylhexyl ester, the method and the application have the advantages that
maleic acid monoester is generated from
maleic anhydride by means of alcoholysis, then the
maleic acid monoester is polymerized with
ethylene oxide or propylene
epoxide and is polymerized with
ethylene oxide to generate novel diester which is the cis-butenedioic acid di-2-ethylhexyl ester,
acrylate can be substituted with the cis-butenedioic acid di-2-ethylhexyl ester for preparing the polycarboxylic
acid water reducing agents, accordingly, the
slump retention performance of the polycarboxylic
acid water reducing agents can be improved, and low
slump loss of premixed concrete in two hours can be guaranteed; integral reaction, structures and molecular weights canbe controlled, the reaction can be smoothly and steadily carried out,
water production can be prevented, the cis-butenedioic acid di-2-ethylhexyl ester is green and
environmentally friendly and is high in yield,
preparation procedures are simple, and industrial production can be facilitated. A
structural formula of the cis-butenedioic acid di-2-ethylhexyl ester is shown. An R in the
structural formula represents methyl or ethyl or propyl or
isopropyl or normal-butyl or
diethylene glycol mono-methyl
ether, an m and an n in the
structural formula are integers, the m ranges from 0 to 8, and the nranges from 1 to 15.