Abstract: This invention relates to a multilayer film comprising a layer which contains a vinylcyclohexane-based polymer or mixtures thereof and at least one further layer. The multilayer film is distinguished by elevated water vapour barrier action and low oxygen permeability.

Abstract: An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change or chemical change to vary the refractive index, the light transmitting layer 13 is 10 &mgr;m to 177 &mgr;m in thickness, the relation between absorption coefficient “k” and pyrolysis temperature Tdec of organic material is

Abstract: The use of phenols having a branched structure as terminal groups in polycarbonates, polyester carbonates and polyesters is disclosed. Also disclosed are polycarbonates, polyester carbonates and polyesters having such branched terminal groups, the process for their production and molded parts made therefrom.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and, if desired, a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue or red light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one xanthene dye which contains at least two anionic groups and has at least one cation containing at least one conjugated &pgr; system having at least 6 &pgr; electrons as counterion, where the cation must not be benzyltrimethylammonium, benzyltriethylammonium, tetraphenylphosphonium, butyltriphenylphosphonium or ethyltriphenylphosphonium, is used as light-absorbent compound.

Abstract: A process for the production of polyamides is disclosed. In a first reaction step, suitable monomers such as caprolactam or an aliphatic aminocarboxylic acid are reacted with polyfunctional amines, which contain at least one secondary amino group, and/or with salts containing such amines and dicarboxylic acids. The reaction product is in a further process step undergoes solid phase post-condensation.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one diaza hemicyanine dye is used as the light-absorbing compound.

Abstract: The invention relates to an optical data carrier having a preferably transparent substrate that has optionally previously been coated with one or more reflection layers and to the surface of which has been applied a light-writeable information layer, optionally one or more reflection layers, and optionally a protective layer or a further substrate or a covering layer, such that the optical data carrier can be written on or read by means of blue light (preferably laser light having a specified wavelength) or by means of infrared light (preferably laser light having a specified wavelength), wherein the information layer contains

Abstract: Monofilms containing a vinylcyclohexane-based polymer or a mixture of vinylcyclohexane-based polymers with at least one polar polymer.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cationic aminoheterocyclic dye is used as light-absorbent compound.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one heterocyclic azo dye is used as the light-absorbing compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cyanine dye is used as light-absorbent compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one merocyanine dye is used as light-absorbent compound.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one triazacyanine dye is used as the light-absorbing compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with a protective layer and to whose surface a light-writable information layer, if desired a protective layer, if desired an adhesive layer and finally a covering layer have been applied, which can be written on and read by means of blue light, preferably laser light, where the information layer comprises a light-absorbent compound, characterized in that at least one dye which cyclizes thermally is used as light-absorbent compound.

Abstract: A branched polyamide and a process for its preparation are disclosed. Aliphatic or aromatic esters of carbonic acid are used as branching agents in an optionally catalyzed reaction with crystalline polyamide to produce resins having good flow properties, high degree of crystallinity and excellent mechanical properties. Amorphous polyamides that are branched in accordance with the inventive process have improved flow properties.

Abstract: The present invention relates to block copolymers which are predominantly based on vinylcyclohexane and to a process for producing them. The block copolymers can be processed to form mouldings by extrusion or injection moulding. The mouldings which result therefrom are distinguished by their high resistance to thermal deformation, good mechanical properties, high transparency in the visible and near UV range, and by their particularly low birefringence and water absorption.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on and read by means of infrared light, preferably laser light, particularly preferably light having a wavelength in the range 750-800 nm, in particular 770-790 nm, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cobalt(III) phthalocyanine in which the Co metal centre bears two axial substituents R1 and R2 which represent, independently of one another, CN, SCN, alkoxy or alkylthio is used as light-absorbent compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with a reflection layer and to whose surface a light-writeable information layer, if desired a reflection layer and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that the light-absorbent compound has at least two identical or different chromophoric centers and has at least one absorption maximum in the range from 340 to 820 nm.

Abstract: The present invention relates to a singly recordable optical data medium using Co-phthalocyanine complexes of the formula (I) 1

Abstract: An apparatus for the spectroscopic analysis of the composition of the contents of vessels, especially of conduits, by recording transmission spectra is described. The apparatus comprises at least a radiation source for generating the measuring radiation, and a spectral analyzer for measuring the transmitted radiation, two windows which are disposed opposite one another on the vessel and are transparent to the measuring radiation, and two collimators which are designed to spread the measuring radiation within the range of the measuring section and are disposed opposite one another in front of the windows, characterized in that the collimators are positioned relative to one another in a mounting joined to the vessel and the collimators can, while their relative alignment is maintained, be swung out in parallel from the range of the measuring section in the vessel or be displaced and/or be fixed to the mounting, so that the measuring section bypasses the vessel.