Copolymers having a gradient structure
AssigneeSika Technology AG
InventorsJürg Weidmann, Jörg Zimmermann
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Abstract
The present invention relates to a copolymer, especially for use as a dispersant for solid particles, in particular for use as dispersant for mineral binder compositions, having a polymer backbone and side chains bonded thereto, comprising at least one ionizable monomer unit M1 and at least one side chain-bearing monomer unit M2, wherein the copolymer has a gradient structure in at least one section A in a direction along the polymer backbone with regard to the ionizable monomer unit M1 and/or with regard to the side chain-bearing monomer unit M2.
Claims22
A copolymer having a polymer backbone and side chains bonded thereto, and comprising at least one ionizable monomer unit M1 and at least one side chain-bearing monomer unit M2, the copolymer having:
- at least one section A having a gradient structure in a direction along the polymer backbone with regard to the ionizable monomer unit M1 and/or with regard to the side chain-bearing monomer unit M2, and
- at least one section B having an essentially constant local concentration of monomers and/or a random distribution of monomers, wherein the at least one section B comprises ionizable monomer units M1 and/or side chain-bearing monomer units M2,
- wherein a ratio of the number of monomer units in the at least one section A to the number of monomer units in the at least one section B is in the range of 80:20 to 20:80.
Dependencies are inferred from the claim text.