Abstract:
The invention relates to a method for producing deodorizing water-absorbing polymer particles based on ethylenically unsaturated, acid group-carrying monomers, the polymer particles being coated with a chelating agent and a tannin.
Abstract:
The invention relates to fine-particle, cationic polymer dispersions that can be obtained by emulsion polymerisation of ethylenically unsaturated monomers in an aqueous solution of a cationic pre-polymer as a dispersant. First, a cationic pre-polymer is produced by the polymerisation of: a) between 10 and 45 wt. % of at least one (meth)acrylic acid ester comprising an amino group and/or a quarternary ammonium group, and/or a (meth)acrylic amide, carrying an amino group and/or a quaternary ammonium group, b) between 40 and 85 wt. % of at least one optionally substituted styrol, c) between 0 and 20 wt. % of acrylic nitrile or methacrylic nitrile, d) between 1 and 15 wt. % of at least one ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic acid anhydride, and e) between 0 and 20 wt. % of at least one non-ionic, ethylenically unsaturated monomer different from the monomers (b) and (c), the sum of (a) + (b) + (c) + (d) + (e) amounting to 100 wt. %, in a solution polymerisation in an organic solvent that can be mixed with water. The solution of the pre-polymer produced in this way is diluted with water, and then an emulsion polymerisation of a monomer mixture of: i) between 30 and 80 wt. % of acrylic nitrile and/or methacrylic nitrile, ii) between 5 and 50 wt. % of at least one C 1 to C 4 alkyl acrylate or at least one C 1 to C 4 alkyl methacrylate, iii) between 5 and 50 wt. % of at least one C 6 to C 14 alkyl acrylate or at least one C 6 to C 14 alkyl methacrylate, and iv) between 0 and 20 wt. % of a non-ionic monomer diferent from the monomers (i), (ii) und (iii), the sum of (i) + (ii) + (iii) + (iv) amounting to 100 wt. %, is carried out in the aqueous solution of the pre-polymer, in the presence of water-soluble polymerisation inhibitors. The invention also relates to the use of the fine-particle cationic polymer dispersions obtained in this way as materials and surface sizing agents for paper, paperboard and cardboard.
Abstract:
Process for producing finely divided liquid-liquid formulations and apparatus for producing the same, comprising a) a baffle having at least one inlet nozzle and a baffle having at least one outlet nozzle, the nozzles being arranged axially with respect to one another, a static mixer being located in the space between the baffles, and there being, additionally, if appropriate, mechanical introduction of energy, or b) a baffle having at least one inlet nozzle and an impingement plate, there being, if appropriate, in the space between the baffle and the impingement plate a static mixer and/or mechanical introduction of energy.
Abstract:
The invention relates to a method for producing aqueous dispersions conta ining at least one lipophilic active substance by emulsion polymerization of ethylenically unsaturated monomers in an aqueous medium in the presence of at least one lipophilic active substance. The method according to the invent ion comprises the following steps: (i) emulsifying at least one lipophilic a ctive substance having a water solubility of not more than 5 g/l (establishe d at 25°C and 1013 mbar) and a melting point below 130°C, in an aqueous solu tion which contains at least one dispersion stabilizer, while producing an a queous solution of the active substance with an average particle size of not more than 1000 nm, and (ii) subjecting a monomer composition which contains at least 80% of a neutral, monoethylenically unsaturated monomer that can b e emulsified in water, in the aqueous dispersion of the active substance obt ained in step (1), to an emulsion polymerization. The invention also relates to the use of the dispersions obtained according to the invention as sizing agents for paper, paperboard and cardboard, for finishing and stabilizing t hermoplastic polymers, for material protection and crop protection.
Abstract:
Procedimiento para la obtención de formulaciones líquido-líquido finamente divididas con un dispositivo de mezclado que está constituido por una placa perforada con al menos una tobera de entrada y una placa perforada con al menos una tobera de salida, encontrándose un mezclador estático en el espacio intermedio entre las placas perforadas, y efectuándose adicionalmente, en caso dado, una introducción de energía mecánica.
Abstract:
Dispersiones acuosas de dímeros de alquilceteno, que contienen, al menos, un 15% en peso de un dímero de alquilceteno así como, al menos, un almidón catiónico soluble en agua, sulfato de aluminio y, al menos, un producto de condensación formado por el ácido naftalinsulfónico y el formaldehído o por el ácido lignosulfónico o respectivamente sus sales, caracterizadas porque las dispersiones contienen, referido respectivamente al dímero de alquilceteno, desde un 2 hasta un 50% en peso de sulfato de aluminio, conteniendo las dispersiones, además, entre un 0,1 y un 5% en peso de un ácido carboxílico saturado con 1 hasta 10 átomos de carbono, de ácido bencenosulfónico, de ácido ptoluenosulfónico y/o de un ácido mineral, con un contenido en sulfato de aluminio comprendido entre un 2 y un 15% en peso.
Abstract:
Utilización del agente de encolado de papel acorde a una de las reivindicaciones 1 a 8 como agente de encolado masivo para la obtención de papel, cartulina, cartón y cartón líquido.
Abstract:
A paper size which comprises a stable aqueous dispersion of a reactive size, from 5 to 100% by weight, based on the reactive size, of a substantially linear nitrogen-comprising polymer having at least 3 mmol/g of basic nitrogen atoms, and from 1 to 50% by weight of cationic starch having a degree of substitution of at least 0.05 is described. The paper size has a good sizing effect and a stable viscosity.
Abstract:
Disclosed are aqueous dispersions of (meth)acrylic esters of polymers con taining N-hydroxyalkylated lactam units. Said aqueous dispersions can be obt ained using radically initiated emulsion polymerization, a process in which (a) styrene, acrylonitrile, methacrylonitrile, and/or methyl methacrylate, ( b) at least one C1 to C18 alkyl acrylate and/or at least one C2 to C18 alkyl methacrylate, (c) at least one acrylic ester of an N-hydroxyalkylated lacta m and/or at least one methacrylic ester of an N-hydroxyalkylated lactam, and (d) other optional ethylenically unsaturated monomers are copolymerized as monomers. Also disclosed are the use of said aqueous dispersions and/or poly mers containing at least one acrylic ester of an N-hydroxyalkylated lactam a nd/or at least one methacrylic ester of an N-hydroxyalkylated lactam in a co polymerized form for treating the surface of paper and paper products as wel l as the ink jet papers obtained in said manner.