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Alfred Dr. Pischtschan

Bio: Alfred Dr. Pischtschan is an academic researcher from Bayer. The author has contributed to research in topics: Thermoplastic & Acrylonitrile. The author has an hindex of 11, co-authored 77 publications receiving 696 citations.


Papers
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Patent
22 Apr 1975
TL;DR: In this paper, a thermoplastic molding compositions of the ABS-type produced in emulsion and having improved properties in relation to known ABS-moulding compositions, particularly extreme toughness coupled with ready processibility and high surface gloss.
Abstract: This invention relates to thermoplastic moulding compositions of the ABS-type produced in emulsion and having improved properties in relation to known ABS-moulding compositions, particularly extreme toughness coupled with ready processibility and high surface gloss.

238 citations

Patent
06 Feb 1989
TL;DR: In this paper, the authors use a small amount of titanium dioxide and carbon black and an additive which reduces the tracking resistance, for the production of laser-writable moldings.
Abstract: Plastic containing small amounts of titanium dioxide and, if appropriate, carbon black and an additive which reduces the tracking resistance, for the production of laser-writable mouldings.

54 citations

Patent
08 Oct 1981
TL;DR: A particulate graft polymer is a core formed by a crosslinked homopolymer of a conjugated diene or a copolymer thereof with up to 10% by weight of styrene or acrylonitrile.
Abstract: A particulate graft polymer comprising (a) a core formed by a crosslinked homopolymer of a conjugated diene or a copolymer thereof with up to 10% by weight of styrene or acrylonitrile; (b) a first shell formed by a crosslinked homopolymer of an acrylic acid alkyl ester or a copolymer thereof with up to 30% by weight of vinyl monomers; (c) a second shell formed by a polymer of resin-forming monomers, a process for manufacturing these graft polymers by means of a multi-stage emulsion polymerization, and their application as molding compositions, optionally together with rigid thermoplastic resins.

26 citations

Patent
26 Aug 1992
TL;DR: In this article, a thermoplastic molding composition, containing 5-95 weight percent of a thermoplastics homo-, co-, or terpolymer of styrene, alpha-methylstyrene, ring-substituted styrene and methyl methacrylate was presented.
Abstract: Thermoplastic molding composition, containing: A) 5-95 weight percent of a thermoplastic homo-, co-, or terpolymer of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof; B) 5-95 weight % of a graft polymer of B.1) 5-90 parts by weight of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof on B.2) 95-10 parts by weight of a rubber with a glass transition temperature ≦ 10° C; and C) 0.1-10 parts bye weight per 100 parts by weight of A+B of one or more EPM and/or EPDM rubbers.

25 citations

Patent
07 Oct 1994
TL;DR: In this article, an ABS resin with at least one basically acting additive is used as component A, and component C is selected from compounds having a molecular weight of from 150 to 260 having at least two carboxyl groups (COOH) in the molecule.
Abstract: Thermoplastic molding compositions containing A) ABS-type resin, B) aromatic polycarbonate resins, C) a compound bearing several carboxyl groups or mixtures thereof and optionally D) further polymer resins, characterized in that an ABS resin with at least one basically acting additive is used as component A, component C is selected from compounds having a molecular weight of from 150 to 260 having at least two carboxyl groups (--COOH) in the molecule, and the weight ratio of basically acting additive in A: carboxyl groups in C is from 5:1 to 1:1.

17 citations


Cited by
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Patent
26 Nov 2003
TL;DR: In this paper, a system for issuing identification documents to a plurality of individuals, comprising a first database, a first server, and a workstation, was proposed, where each digitized image contained a biometric image of an individual seeking an identification document.
Abstract: We provide a system for issuing identification documents to a plurality of individuals, comprising a first database, a first server, and a workstation. The first database stores a plurality of digitized images, each digitized image comprising a biometric image of an individual seeking an identification document. The first server is in operable communication with the first database and is programmed to send, at a predetermined time, one or more digitized images from the first database to a biometric recognition system, the biometric recognition system in operable communication with a second database, the second database containing biometric templates associated with individuals whose images have been previously captured, and to receive from the biometric recognition system, for each digitized image sent, an indicator, based on the biometric searching of the second database, as to whether the second database contains any images of individuals who may at least partially resemble the digitized image that was sent. The a workstation is in operable communication with the first server and is configured to permit a user to review the indicator and to make a determination as to whether the individual is authorized to be issued an identification document or to keep an identification document in the individual's possession.

261 citations

Patent
02 Dec 1987
TL;DR: In this paper, the present invention relates to thermoplastic molding compositions of (A) thermoplastics of polycarbonates, if appropriate mixed with (B) polyalkylene terephthalates and (C) elastomeric graft polymers, characterized in that they contain acrylates, vinyl esters and unsaturated nitriles.
Abstract: The present invention relates to thermoplastic moulding compositions of (A) thermoplastic polycarbonates, if appropriate mixed with (B) thermoplastic polyalkylene terephthalates and, if appropriate, additionally with (C) elastomeric graft polymers, characterized in that they contain (D) a terpolymer of acrylates, vinyl esters and unsaturated nitriles.

252 citations

Patent
10 Mar 1993
TL;DR: In this paper, a unitary plural-material, interocclusal dental appliance is described for use in connection with orthodontic/orthopedic treatment of the teeth and jaws of a patient's mouth.
Abstract: A unitary plural-material, interocclusal dental appliance is disclosed for use in connection with orthodontic/orthopedic treatment of the teeth and jaws of a patient's mouth. The appliance includes a first region made from a first material that provides a relatively hard expanse with first and second surfaces, and with the second surface being contactable by one such set of teeth. The second surface may be constructed with a substantially planar shape, or with a shape conforming generally to the cusps of such one set of teeth. A second region is joined to the first region, and is made from a second material that provides a relatively soft, persistently resilient enclosure for the other such set of teeth. The second region includes plural zones, each of which is structured to allow an adjacent enclosed tooth to move toward the first surface of the first region, with such movement resulting in penetration of corresponding teeth into the relatively hard first material for a relatively precise distance. Such penetration defines lateral borders in the first material around such teeth so that the appliance accommodates relatively fixed vertical and lateral positioning of the mandible by enclosing such teeth upon desired biting action by the patient. A method for forming such appliance is also disclosed. Additionally, a curable composition for making a soft, persistently resilient dental appliance is disclosed and it includes a polymer component including butyl methacrylate polymer, and a monomer component including butyl methacrylate monomer.

179 citations

Patent
14 Jan 1983
TL;DR: In this paper, the authors proposed a filler for thermoplastic compositions having enhanced elongation and useful, e.g., as sound-deadening sheeting for automotive carpet, are obtained by blending about 0-50% by weight of an ethylene interpolymer, such as ethylene/vinyl ester, ethylene or dicarboxylic acids or esters of said unsaturated acids, etc.
Abstract: Filled thermoplastic compositions having enhanced elongation and useful, e.g., as sound-deadening sheeting for automotive carpet, are obtained by blending about 0-50% by weight of an ethylene interpolymer, such as ethylene/vinyl ester, ethylene/unsaturated mono- or dicarboxylic acids or esters of said unsaturated acids, etc.; 0-20% by weight of a plasticizer selected from the group consisting of processing oils, epoxidized oils, polyesters, polyethers, polyether esters and combinations thereof; about 40-90% by weight of filler; from about 0.05 to about 5.0% by weight of at least one organic acid or acid derivative selected from the group consisting of saturated polycarboxylic acids having from 6 to 54 carbon atoms, unsaturated mono- and dicarboxylic acids having from 12 to 20 carbon atoms, alicyclic and aromatic carboxylic acids, and mono-, di- and trivalent metal salts, esters and amides of said acids; and optionally modifying resins, such as tackifiers and certain ethylene and propylene homo- and copolymers.

154 citations

Patent
05 Apr 1982
TL;DR: In this article, the authors describe thermoplastic molding materials containing 10 to 99 wt % of a vinyl aromatic polymer with a syndiotactic pentadene content of 30 mol %, and 1 to 20 % of delaminated stratified silicate (phyllosilicate), with other additives and processing agents.
Abstract: The invention relates to thermoplastic molding materials containing A) 10 to 99 wt % of a vinyl aromatic polymer with a syndiotactic pentadene content of 30 mol %, B) 01 to 20 % of delaminated stratified silicate (phyllosilicate), C) 0 to 50 wt % other additives and processing agents, wherein the weight percentages of constituents A) to C) amount to 100 %

142 citations