摘要:
Method for stabilizing polyvinylpyrrolidones, which comprises treating the polyvinylpyrrolidones with sulfur dioxide, sulfurous acid or alkali metal sulfites and then with free-radical scavenger, and converting the solutions treated in this way into the powdered polyvinylpyrrolidones by drying.
摘要:
Method for stabilizing polyvinylpyrrolidones, which comprises treating the polyvinylpyrrolidones with sulfur dioxide, sulfurous acid or alkali metal sulfites and then with free-radical scavenger, and converting the solutions treated in this way into the powdered polyvinylpyrrolidones by drying.
摘要:
Use of crosslinked polyvinylpyrrolidone with an average particle size of 5-60 μm and a hydration capacity of greater than 7 g/g as tablet disintegrant.
摘要:
Finely divided binders in powder form composed of vinyllactam polymers, where the binders have an average particle size of up to 35 μm and an apparent density of less than 0.2 g/ml.
摘要:
Use of crosslinked polyvinylpyrrolidone with an average particle size of 5-60 μm and a hydration capacity of greater than 7 g/g as tablet disintegrant
摘要:
Finely divided binders in powder form composed of vinyllactam polymers, where the binders have an average particle size of up to 35 μm and an apparent density of less than 0.2 g/ml.
摘要:
Disclosed is a method of making packaging material for polymers susceptible to oxidation. The packaging material utilizes a composite foil. The composite foil has at least three layers and have barrier layers based on polyvinyl alcohols. The composite foil may be used to package polymers susceptible to oxidation. Also disclosed is a process for packaging the polymers and the packaging composed of the composite foil.
摘要:
The use of composite foils, comprising barrier layers based on polyvinyl alcohols, as packaging material for polymers susceptible to oxidation, processes for packaging said polymers, and packaging composed of said composite foils for packaging the polymers susceptible to oxidation.
摘要:
Oxidation-sensitive, low-peroxide polymer contained in a sealed, protective-gas-filled packaging form, comprising, per kilogram of polymer solid, at least one inorganic phosphorus compound in amounts such that the total phosphorus content is 2*10−5 to 0.02 mol, and methods for stabilizing oxidation-sensitive polymer against peroxide formation, wherein, during or after the polymerization, at least one inorganic phosphorus compound is added in one or more portions in amounts such that the total phosphorus content per kilogram of polymer solid content of the finished polymer is 2*10−5 to 0.02 mol, and the polymer treated in such a way is placed into a protective-gas filled, sealed packaging form, and also use of these polymers.
摘要:
The preparation and the use of pulverulent compositions consisting of (a) from 10 to 90% by weight of cellulose, (b) from 5 to 60% by weight of an alkali metal caseinate, and (c) from 5 to 85% by weight of a polymer c1) an N-vinyllactam polymer obtained by copolymerization of from 90 to 99.5% by weight of one or more N-vinyllactam monomers and from 0.5 to 10% by weight of a crosslinking monomer, or c2) a polymer obtained by copolymerization of from 50 to 99.5% by weight of at least one vinyl heterocyclyl monomer having a PKa of at least 3.8, from 0 to 49.5% by weight of another copolymerizable monomer and from 0.5 to 10% by weight of a crosslinking monomer, or c3) a mixture of the polymers c1) and c2). The compositions are used in the treatment of biological liquids of plant origin in an unfermented or partially or completely fermented state for sensory stabilization of the liquids with a view to preserving taste and color.