| http://www.w3.org/ns/prov#value | - However, mechanisms other than grafting are also conceivable. [0034] Depending on the degree of grafting, the polymers used according to the invention comprise both pure graft copolymers and mixtures of the abovementioned graft copolymers with ungrafted polyether-containing compounds and homo- or copolymers of monomers a) and c). [0035] Polyether-containing compounds (b) which can be used are both
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