The invention relates to a composition in the form of a solid and suitable as a dispersant for inorganic solids suspensions, comprising A) at least one water-soluble polymer comprising polyether groups, and B) at least one water-soluble condensation product comprising acid groups and/or salts thereof and based on monomers, the monomers comprising at least ) a monomer having a ketone radical and ) formaldehyde. Further disclosed are a method for producing the composition of the invention, and the use thereof in an inorganic binder composition.

The invention relates to a composition in the form of a solid and suitable as a dispersant for inorganic solids suspensions, comprising A) at least one water-soluble polymer comprising polyether groups, and B) at least one water-soluble condensation product comprising acid groups and/or salts thereof and based on monomers, the monomers comprising at least ) a monomer having a ketone radical and ) formaldehyde. Further disclosed are a method for producing the composition of the invention, and the use thereof in an inorganic binder composition.

This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R.sup.1 and R.sup.2 represent hydrogen, methyl or ethyl, A represents a linear or branched C.sub.1-C.sub.12-alkylene, and Q.sup.+stands for NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R.sup.1 represents hydrogen, methyl, or ethyl, X.sup.+stands for H.sup.+, NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.

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This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R.sup.1 and R.sup.2 represent hydrogen, methyl or ethyl, A represents a linear or branched C.sub.1-C.sub.12-alkylene, and Q.sup.+stands for NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R.sup.1 represents hydrogen, methyl, or ethyl, X.sup.+stands for H.sup.+, NH.sub.4.sup.+, Li.sup.+, Na.sup.+, K.sup.+, Ca.sup.++, Mg.sup.++, Zn.sup.++, Al.sup.+++, or organic ammonium ions of the formula [HNR.sup.5R.sup.6R.sup.7].sup.+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.

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##STR00002##

A copolymer, in particular a dispersant for hydraulically setting binder compositions, including a specific dicarboxylic acid based subunit and a specific polyalkylene glycol based subunit wherein the molar ratio of the dicarboxylic acid based subunit to the polyalkylene glycol based subunit is from 1.5-4.

A method for processing a mix of lignocellulose fibers, such as miscanthus or sorghum fibers, for the production of a bio-based composite, having the steps of: harvesting lignocellulosic crops and processing the harvested lignocellulosic crops to obtain a raw mix of lignocellulose fibers, separating the raw mix of lignocellulose fibers, such as by sieving or grinding, into a first fraction (f1) having a mix of fibers having a fiber size of approximately <s1 and having first physical/chemical properties and a second fraction (f2) having a mix of fibers having a fiber size of approximately >s1 and having second physical/chemical properties being different from the first physical/chemical properties, mixing the fibers of the first fraction (f1) or the fibers of the second fraction (f2) with a binding agent, letting the binding agent harden, to obtain the bio-based composite.

The invention relates to an aqueous composition comprising a copolymer obtained by a particular polymerization reaction using an anionic monomer comprising a polymerizable olefinic unsaturation and a carboxylic acid function and a monomer of formula (I):

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the invention also relates to this copolymer per se, and to a method for the preparation thereof and to the use thereof as a superplasticizer.

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.

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.

Functionalized polyacrylate polymer compositions for treating clay or clay bearing aggregates compositions are disclosed. Also disclosed are methods for preparing the functionalized polyacrylate polymer compositions, admixtures containing such polymers and methods for the mitigation of clays in cementitious and aggregate compositions using these polymers.