摘要:
In order to create novel security features in secure and/or valuable documents, a polymer layer composite, which has at least two polymer layers that are bonded to each other in a material fit is provided. At least one surface is printed with an absorbing printed layer within a visible region in and/or on the composite located on a polymer layer of the composite. The absorbing printed layer forms at least one printed region, and all printed regions of the printed surface of the polymer layer have a total surface area of at least 50% and not more than 95%.
摘要:
The present invention relates to a method of producing aromatic amines by hydrogenation of aromatic nitro compounds. This method provides a reactor containing a hydrogenation catalyst; supplies aromatic nitro compounds and hydrogen to the reactor and contacts them with a hydrogenation catalyst, in which the hydrogen which is supplied to the reactor is by a compressor and the compressor contains an operating fluid which at least partially contacts the hydrogen; and regenerates the hydrogenation catalyst by heating and contacting it with oxygen. Particular operating liquids are subsequently exchanged.
摘要:
The present invention provides a process for the preparation of polyols based on fatty acid esters and starter compounds having Zerewitinoff-active hydrogen atoms and the use thereof for the preparation of polyurethane materials.
摘要:
Chlorine is prepared by catalytic oxidation of a hydrogen chloride stream having a content of sulfur in elemental or bonded form of less than 100 ppm, preferably less than 50 ppm, more preferably less than 5 ppm, most preferably less than 1 ppm, based on the weight of the hydrogen chloride stream.
摘要:
The invention relates to polyisocyanates comprising urethane groups, based on toluylene diisocyanate, to a method for their production, and to their use as the polyisocyanate component in one- and two-component polyurethane coatings.
摘要:
The present invention relates to a polyester polyurethane material with long term hydrolysis resistance which is prepared from perchlorates and a polyester polyol comprising structure unit I, II, and III. The polyester polyurethane material having a mole ratio of structure unit II to III of 1:1.5 to 1.5:1 has better long term hydrolysis resistance. In another aspect of the present invention, there is provided soles, carpets, rollers, sealing strips, coating, tires, wipers, steering wheels or gaskets prepared from the polyester polyurethane material, and a use of the polyester polyurethane material.
摘要:
The present invention relates to a process for the continuous preparation of diaryl carbonates from phosgene and at least one monohydroxy compound (monophenol) in the presence of catalysts, and also the use thereof for preparing polycarbonates. The hydrogen chloride formed in the reaction is converted by thermal oxidation into chlorine, with the chlorine being recirculated to the preparation of phosgene. In particular, the process comprises utilization of the hydrogen chloride formed for the process for preparing diphenyl carbonate (DPC process).
摘要:
The present invention relates to flameproofed polycarbonate (PC) compositions and moulding compounds which have modified impact strength, good mechanical properties, good chemical resistance and high hydrolysis stability. The present patent application further relates to the use of the compositions for the production of moulded articles and to the moulded articles produced from the compositions.
摘要:
The present invention relates to a method for the production of oxazolidinone compounds, comprising the step of slowly reacting an isocyanate compound with an epoxide compound in the presence of a Lewis acid catalyst. The invention further relates to an oxazolidinone compound, obtainable by a method according to the invention, with a colour as determined according to ASTM D1209-05 (2011) of ≦200 and a molar ratio of the oxazolidinone compound to isocyanurate by-product o/i of ≧85/15. Lastly, the invention relates to an oligomeric or polymeric oxazolidinone compound, obtainable by a method according to the invention using an isocyanate compound with two or more NCO groups per molecule and an epoxide compound with two or more epoxy groups per molecule, comprising at least two units derived from the isocyanate compound and at least two units derived from the epoxide compound, with a colour as determined according to ASTM D1209-05 (2011) of ≦200.