Abstract: The present invention relates to polymer dispersions which comprise highly branched polycarbonates, to a process for preparing them, and to their use.

Abstract: The use of polyelectrolyte complexes is described, for providing an oxygen barrier to packaging materials made of polymer foils. Polymeric components of the polyelectrolyte complex are applied in polymerized form to the polymer foil. The polymer foil is either coated with an aqueous dispersion comprising a dispersed polyelectrolyte complex previously produced by water-in-water emulsion polymerization, or is coated with a composition comprising a polyelectrolyte complex produced from anionic polymer and from cationic surfactant, or the polymer foil is coated with at least three alternating layers, where respectively one of two adjacent layers comprises an anionic polyelectrolyte component and the other of two adjacent layers comprises a cationic polyelectrolyte component, and polyelectrolyte complexes form at the opposite, adjacent interfaces of the alternating layers.

Abstract: A barrier coating is described, where a polymer layer of thickness at least 1 ?m is applied on a supportive substrate, selected from polymer foils, paper, and paperboard, and the polymer layer has been formed from a copolymer which can be produced via ring-opening metathesis polymerization of (a) olefin monomers, selected from monocyclic olefin monomers having 1 or 2 endocyclic C—C double bonds and bicyclic olefin monomers having an endocyclic C—C double bond, and (b) polycyclic olefin monomers having at least two C—C double bonds, e.g. a copolymer of cyclooctene and dicyclopentadiene.

Abstract: Described are aqueous polymer dispersions and methods of making them. The polymer dispersions are obtainable by free-radically initiated emulsion polymerization of 19.9 to 80 parts by weight of vinylaromatic compounds, 19.9 to 80 parts by weight of acrylate monomers selected from C1-C10 alkyl acrylates and C1-C10 alkyl methacrylates, 0.1 to 10 parts by weight of ethylenically unsaturated acids, and 0 to 20 parts by weight of other ethylenically unsaturated monomers, wherein the emulsion polymerization is effected in an aqueous medium in the presence of free-radical initiators, seed latex and also at least one carbohydrate compound in the form of a degraded starch. The polymer dispersions are particularly useful in the manufacture of paper coating slips.

Abstract: The present invention relates to a process for producing aqueous dispersions of thermoplastic polymers which have a plurality of ester groups and/or carbonate groups in the main polymer chain and which have an acid number of less than 5 mg KOH/g, in particular at most 3 mg KOH/g, and which have a zero-shear viscosity ?0 (180° C.) of at least 60 Pa·s at 180° C. The invention also relates to the polymer dispersions obtainable by said process, and to the use thereof.

Abstract: As associative thickener obtainable by free radical polymerization, the preparation thereof and the use thereof in paper coating slips are described. The associative thickener is formed from (a) acid monomers selected from ethylenically unsaturated C3- to C8-carboxylic acids, (b) associative monomers of the general formula H2C?CR1—COO(EO)n—(PO)m—R2, in which R1 is hydrogen or methyl, n is a number of at least two, m is a number from zero to 50, EO is an ethylene oxide group, PO is a propylene oxide group and R2 is a C8-C30-alkyl group or a C8-C30-alkaryl group, and (c) nonionic, copolymerizable monomers differing from a) and b), the reaction product having been reacted, after the polymerization, with initiators forming nonionic radicals.

Abstract: A description is given of a method of producing packaging, the packaging surface being coated with a polyelectrolyte complex, and the polyelectrolyte complex being composed of at least one first polymer and at least one second polymer, the first polymer being an anionic polymer and the second polymer being a cationic polymer. The packaging is distinguished by good fat barrier properties.

Abstract: A paper coating slip which comprises metal salt pigments in an amount of at least 40 parts by weight, based on the total amount of pigments, and an aqueous dispersion of water-soluble copolymers is described. The copolymers are obtainable by free radical polymerization of ethylenically unsaturated, anionic monomers with ethylenically unsaturated, nonionic monomers in the presence of polymeric stabilizers for water-in-water polymer dispersions. The paper coating slips have good rheological properties and good water retention behavior in the coating of paper or cardboard.

Abstract: Aqueous dispersions of crosslinked emulsion polymers comprising tertiary ester groups, comprising (a) at least 50% by weight of an ester derived from a tertiary alcohol and an ethylenically unsaturated C3 to C5 carboxylic acid, (b) 0.001% to 5.0% by weight of at least one compound having at least two ethylenically unsaturated double bonds, and (c) 0% to 49.999% by weight of at least one other monoethylenically unsaturated compound in interpolymerized form and having an average particle size of not more than 1000 nm, and water-absorbing materials obtainable by coating a backing material with the aqueous dispersion described of crosslinked emulsion polymers comprising tertiary ester groups, drying and heating the thus treated backing material to a temperature of at least 140° C. to form carboxyl groups from the tertiary ester groups of the emulsion polymer and at least partly neutralizing the carboxyl groups, and also the use of the water-absorbing materials as an absorbent for water and aqueous fluids.

Abstract: Paper coating slips comprising at least one pigment and A) an aqueous polymer dispersion obtainable by emulsion polymerization (emulsion polymer for short) and B) a polysilicic acid dissolved or dispersed in water or dispersed silica (summarized as silica sol).

Abstract: Aqueous polymer dispersion having a solids content greater than 50% by weight, obtainable by emulsion polymerization of monomers in the presence of organic polymers (organic particles for short) which are dispersible in the aqueous phase without surface-active assistants.

Abstract: The present invention relates to polymer dispersions which comprise highly branched polycarbonates, to a process for preparing them, and to their use.

Abstract: Aqueous polymer dispersion obtainable by emulsion polymerization of monomers in the presence of inorganic polymer particles (inorganic particles for short) which are dispersible in the aqueous phase without surface-active assistants.

Abstract: A multilayered composite or coated substrate, comprising compounds of which at least 40% by weight are composed of alpha-amino acids linked via peptide bonds as adhesion promoters between at least two adjacent layers of the composite or between the coating and the substrate.

Abstract: The use of a cationic polymer as a biocidal active substance, wherein no other biocidal active substances, in particular no quaternary ammonium salts, are concomitantly used, the polymer is a polyethylenimine which comprises at least 95% by weight of units of the formula —CH2-CH2-N??I in which N is a primary, secondary, tertiary or quaternary nitrogen atom, or a polyvinylamine which comprises at least 95% by weight of ethylenically unsaturated compounds capable of free radical polymerization and having a primary, secondary, tertiary or quaternary amino group in polymerized form, and the polymer comprises from 0.1 to 22 milliequivalents of cationic groups per gram of polymer.

Abstract: The invention relates to a process for the preparation of greaseproof packaging material with a kit number of greater than 21 by using hydroxypropylated high-amylose potato starch.

Abstract: Aqueous dispersions comprising a polyurethane composed of a) diisocyanates, b) diols of which b1) from 10 to 100 mol %, based on the total amount of diols (b), have a molecular weight of from 500 to 5000, and b2) from 0 to 90 mol %, based on the total amount of diols (b), have a molecular weight of from 60 to 500 g/mol, c) monomers other than the monomers (a) and (b), containing at least one isocyanate group or at least one isocyanate-reactive group and further carrying at least one hydrophilic group or potentially hydrophilic group by means of which the polyurethane is made dispersible in water, d) if desired, further, polyfunctional compounds other than the monomers (a) to (c), containing reactive groups which are alcoholic hydroxyl groups, primary or secondary amino groups or isocyanate groups, and e) if desired, monofunctional compounds which are other than the monomers (a) to (d) and contain a reactive group which is an alcoholic hydroxyl group, a primary or secondary amino group or an isocyanate group

Abstract: Aqueous dispersions comprising a polyurethane composed of (a) diisocyanates, (b) diols, (c) monomers, excluding monomers (a) and (b), containing at least one isocyanate or isocyanate-reactive group and further carrying at least one hydrophilic group to render the polyurethane dispersible in water, d) optionally, polyfunctional compounds, excluding monomers (a) to (c), containing alcoholic hydroxyl, primary or secondary amino, or isocyanate reactive groups, and (e) optionally, monofunctional compounds, excluding monomers (a) to (d), containing an alcoholic hydroxyl, primary or secondary amino, or isocyanate reactive group, obtained by reacting the monomers (a), (b), (c), and, optionally (d) and (e), in the presence of a cesium salt.

Abstract: A process for impregnating base paper or fiber webs with an aqueous dispersion of a polymer of free-radically polymerizable compounds (monomers), which comprises from 0.1 to 5% by weight of the monomers being methacrylic acid.

Abstract: A process for impregnating base paper or fiber webs with an aqueous dispersion of a polymer of free-radically polymerizable compounds (monomers), which comprises from 0.1 to 5% by weight of the monomers being methacrylic acid.