The invention concerns a method for preparing water-soluble acrylic copolymers
comprising the following steps: (i) preparing at least a monomer (1) of formula
(I) wherein Ao is a -(RtO)mRz or -NRp (RtO)mRz group, by
reacting a (meth)acrylic anhydride derivative (1) of formula (II) with
a compound of formula AoH, Ao being as defined above; (ii) copolymerizing said
monomer (1) with at least a monomer (2) of (meth)acrylic acid or of a derivative
of said acid. The invention also concerns novel water-soluble acrylic copolymers
and their use as superplasticizers or dispersants for hydraulic binders such as
cements.
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