摘要:
Finely divided acicular and pore-free .alpha.-Fe.sub.2 O.sub.3 is prepared from an iron(III) salt in the presence of one or more organic substances which form complexes with iron(III) ions, in alkaline supension at from 80.degree. to 250.degree. C., and is used for the preparation of magnetic materials suitable for magnetic recording media.
摘要翻译:在一种或多种与铁(III)离子形成络合物的有机物质的存在下,在80至250℃的碱性载体中,由铁(III)盐制备精细分散的针状和无孔α-Fe 2 O 3。 ,并用于制备适用于磁记录介质的磁性材料。
摘要:
The present invention relates to unctuous composition containing at least one solid active ingredient, at least one hydrophobic protective colloid and at least one edible oil. The active ingredient is preferably a carotenoid. The preferred protective colloids are prolamines. The invention compositions are simple to produce, have good bioavailability and dyestuff yield, and are used an addition to animal feed agents, foods, and dietary supplements and pharmaceutical and cosmetic agents.
摘要:
The present invention comprises aqueous dispersions comprising a nanoparticulate formulation of crop protection agents in which the nanoparticles have core-shell structures having a mean particle diameter of 0.05 to 2.0 μm and the crop protection agent is present in the core X-ray amorphous together with one or more polymers, where the polymer is not or only partially soluble in water or aqueous solutions or water/solvent mixtures and the shell consists of a stabilizing coating matrix, preparable by a process which comprises (a) preparing a solution of the crop protection agent in a water-immiscible organic solvent, (b) dissolving the core polymer in a water-immiscible organic solvent; and (c) emulsifying the mixture resulting from (a) and (b) with an aqueous solution comprising components of the coating matrix by injecting the corresponding solutions into a mixing chamber and removing the organic solvent after emulsification.
摘要:
The invention relates to a method of producing powdered preparations comprising 2,4,6 trianilino p (carbo 2′-ethylexyl-1′-oxy)-1,3,5 triazine of the formula I and diethylamino hydroxybenzoyl hexyl benzoate of the formula II the method comprising: a) jointly dispersing the compounds I and II in an aqueous molecularly disperse or colloidally disperse solution of a protective colloid; and b) converting the dispersion obtained into a dry powder by removing the water and drying, wherein the protective colloid used in process step a) is modified starch.
摘要:
The invention relates to a method of producing powdered preparations comprising 2,4,6-trianilino-p-carbo-2′-ethylhexyl-1′-oxy)-1,3,5-triazine of formula I by the method comprising: a) dispersing the triazine of formula I in an aqueous molecularly disperse or colloidally disperse solution of a protective colloid and b) converting the dispersion obtained into a dry powder by removing the water and and drying, wherein the protective colloid used in process step a) is modified starch.
摘要:
The present invention relates to a set of (co)polymers, dispersion formulations, solid solutions and formulation conditions able to disperse a dye selected from the group of a monoazo dye, quinophthalone dye and an anthraquinone dye in a stable nanoparticular form in an aqueous medium.
摘要:
Organosulfur compounds can be used in complexes with carotenoids for effecting a bathochromic shift in the absorption bands of carotenoids in the UV/vis spectrum. Carotenoid formulations comprising these complexes, a process for preparing these formulations and their use in the food, cosmetics and pharmaceutical sectors are described.
摘要:
An acicular, ferromagnetic material which has a high coercive force and essentially consists of iron-containing chromium dioxide is prepared by thermal decomposition of hydrated chromium(III) chromate under superatmospheric pressure.
摘要:
Acicular, ferromagnetic metal particles which essentially consist of iron and have a nickel content of not more than 0.4% by weight and high values for coercive force and magnetization, and a process for the preparation of these particles. The particles further include zinc, phosphorus in the form of phosphate ions, and silicon in the form of SiO.sub.2.