摘要:
A process for the manufacture of high impact and translucent polystyrene, in which, in a first stage, styrene is prepolymerized in mass or in solution in the presence of a rubber, and the polymerization is then completed in mass, in solution or in aqueous suspension. The prepolymerization is taken to a stage where the amount of styrene converted is from 3 to 10 times the amount of the elastomer constituent of the rubber, and at this conversion the disperse soft-component phase formed should have a mean particle size of less than 1 .mu.m and should contain from 35 to 65% by weight of free or chemically bonded polystyrene segments. The translucent styrene polymers of high impact strength may be used for packaging purposes.
摘要:
This invention relates to a process for the manufacture of graft copolymers based on methyl methacrylate polymers. The methyl methacrylate polymer is reacted with a high molecular weight organic compound containing at least one alkylene oxide unit having an alkali metal alcoholate end group, during which reaction transesterification occurs to eliminate alkali metal methoxide and cause chain joining. The graft copolymers may be used for the production of shaped articles or coating compositions and as additives, antistatic agents or adhesion promoters for plastics materials.
摘要:
A method for the processing of bank notes wherein serial numbers of the bank notes to be processed are ascertained and compared with stored serial numbers in order to control the processing of the bank notes, having a specification of several classes which respectively characterize at least one property of bank notes, an association of at least one of the classes with one or several serial numbers in order to associate at least one property with the bank note provided with the respective serial number, a storage of the respective serial number as well as of the associated class or classes, and a control of the processing of the bank notes by means of the stored classes associated with the respective serial numbers.
摘要:
The invention relates to an apparatus and a method for checking bank notes wherein measuring values of the bank note to be checked are obtained and a classification of the bank note is carried out by evaluation of the measuring values in a plurality of checking steps, whereby the classification distinguishes in particular at least the classification categories, counterfeit, suspect and genuine bank notes, or acceptable or redispensable, and a linkage of a plurality of measuring values is formed at least in one checking step for deciding whether the checked bank note corresponds to a given classification category and this linkage term is compared with a corresponding tolerance range during evaluation.
摘要:
The invention relates to an apparatus and a method for automatically checking sheet-shaped documents of value.According to the present invention a simply constructed measuring apparatus can be obtained, by the measuring apparatus evaluating measuring values e.g. at least two measuring frequencies and the position of one or a plurality of discrete measuring tracks being determined in such a way that at least the presence of two different not visible spectral properties of a predetermined type of authentic documents of value can be checked.
摘要:
An apparatus for checking the authenticity of bank notes in unprotected areas, has a sensor assembly containing a light source which produces light of a first wavelength with which the bank notes to be checked are illuminated; whereupon one or more feature substances present in and/or on the bank notes produces light of a second wavelength which is detected by the sensor assembly. A control device evaluates data from the sensor assembly about the light of the second wavelength and compares them with reference data to determine the authenticity of the bank notes. The structure and operation of the sensor assembly and/or the control device permit conclusions to be drawn only with difficulty on the feature substance or substances contained in the bank notes.
摘要:
The present invention concerns a method and an apparatus for processing bank notes.Therein, for the processing of bank notes, the invention starts out from singling the bank notes, transporting the singled bank notes through a sensor device to several output units, checking the bank notes by the evaluation of data as well as determining and storing serial numbers of the bank notes, subsequent to which the bank notes are transported to the output units depending on the result of the checking, wherein in the determination of the serial numbers of the bank notes a unique serial number is established for each bank note.
摘要:
The present invention relates to an apparatus (1) for examining documents (2), in particular banknotes. Therein the apparatus (1) comprises at least one light source (3), at least one spectral device (8) and at least two detection devices (9, 10, 11, 24). By means of the light source (3) the document (2) is irradiated and the light emitted and/or reflected and/or transmitted by the document (2) is subsequently divided into spectral components by means of the spectral device (8). The spectral components are separately detected by the detection devices. The spectral division of the light (4) emanating from the light source (3) can also be carried out before the light impinges on the document (2). The apparatus (1) is designed so as to individually weight the spectral components to be detected respectively by the detection devices (9, 10, 11, 24).
摘要:
The invention relates to a sheet-shaped value document, such as a bank note. An authenticity feature which can be reliably verified by machine or by humans and which can moreover not be deceptively imitated by copying technology is realized by an electro-optical and/or acoustic display device integrated in the value document.
摘要:
Process for producing tartaric acid from a raw material whose dry matter comprises at least 5 wt% potassium hydrogentartrate wherein the raw material containing potassium hydrogen tartrate (KHT) is mixed with aqueous potassium hydroxide solution in a first reaction stage, where KHT is virtually completely reacted to form dipotassium tartrate (DKT), the aqueous solution containing DKT is then mixed with added acid in a precipitation stage at a pH value of 2.0 to 5.0, to produce a suspension containing crystallized KHT; crystallized KHT is then separated from the suspension, washed with water, and there is produced a solution at least 80 wt-% saturated with KHT and then the potassium is removed, to obtain an aqueous tartaric acid product solution, from which water is then at least partly removed.