Patents Assigned to PCD Polymere Gesellschaft m.b.H.
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Patent number: 6028149Abstract: Procedure for the preparation of a solid catalyst component which is active in the polymerization of olefins, comprising the steps:a) contacting a silylated silica support with a solution of Mg-halide or Mg-alkyl-halide or a mixture of both and Ti-alkoxide or Ti-halogen-alkoxide or a mixture of both, optionally in the presence of Ti-tetrahalide,b) contacting the catalyst-precursor obtained in (a) with Mg-alkyl or Mg-alkyl-halide or a mixture of both, optionally in presence of Lewis base,c) halogenating the catalyst-precursor obtained in (b) by contact of said activated support with halogenating agents,d) titanating the catalyst-precursor obtained in (c) with Ti-tetrahalide in the presence of electron-donors,e) recovering the solid catalyst-component from the reaction products of step (d).The catalyst component, which is obtained according to the above procedure, may also be used together with Al-trialkyl or Al-alkyl-halides and a Lewis base, as a catalyst for the polymerization of olefins.Type: GrantFiled: September 30, 1996Date of Patent: February 22, 2000Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
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Patent number: 5837369Abstract: A packaging film which comprisesa) a sealing ply comprising a mixture ofa.sub.1) 40 to 80% by weight of a C.sub.2 -C.sub.3 random copolymer having a C.sub.2 content of 1-15% by weight ora.sub.2) 40 to 80% by weight of a polymer blend consisting ofa.sub.2.1) 60 to 98% by weight of a crystalline copolymer of propylene with ethylene and/or an .alpha.-olefin of the general formula CH.sub.2 =CHR, where R is a linear or branched alkyl radical having 2-8 carbon atoms, containing 85-99.5% by weight of propylene, anda.sub.2.2) 2 to 40% by weight of a resilient copolymer of ethylene with propylene and/or an .alpha.-olefin of the general formula CH.sub.2 =CHR, containing 20-70% by weight of ethylene, ora.sub.3) 40 to 80% by weight of a highly amorphous polypropylene having a crystalline polypropylene fraction of up to 10% by weight with an enthalpy of fusion of not more than 40 J/g and a melt flow index between 0.Type: GrantFiled: September 27, 1996Date of Patent: November 17, 1998Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Manfred Grunberger, Paul De Mink, Anton Wolfsberger
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Patent number: 5739224Abstract: Procedure for the preparation of a solid catalyst component which is active in the polymerization of olefins, comprising the steps:a) contacting a silylated silica support with a solution of Mg-halide or Mg-alkyl-halide or a mixture of both,b) contacting the catalyst-precursor obtained in (a) with Mg-alkyl or Mg-alkyl-halide or a mixture of both, optionally in presence of electron-donors (Lewis bases),c) halogenating the catalyst-precursor obtained in (b) by contact of said activated support with halogenating agents,d) titanating the catalyst-precursor obtained in (c) with Ti-tetrahalide in the presence of electron-donors,e) recovering the solid catalyst-component from the reaction products of step (d).The catalyst component, which is obtained according to the above procedure, may also be used together with Al-trialkyl or Al-alkyl-halides and a Lewis base, as a catalyst for the polymerization of olefins.Type: GrantFiled: November 8, 1996Date of Patent: April 14, 1998Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Luciano Luciani, Wolfgang Neissl, Birgit Wenidoppler
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Patent number: 5705568Abstract: New polypropylenes which are obtained by chemical degradation of elastic polypropylenes using organic peroxides.Type: GrantFiled: July 24, 1996Date of Patent: January 6, 1998Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Markus Gahleitner, Klaus Bernreitner, Norbert Hafner, Rudolf Wolfer, Wolfgang Neissl
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Patent number: 5686533Abstract: Polypropylenes having a reduced tendency to white fracture, which containA) from 70 to 95% by weight of a highly isotactic polypropylene having anisotactic index of more than 90 and a melt flow index between 0.1 and 100 g/10 min, it being possible for the polypropylene to be a homopolymer of propylene or a copolymer of propylene with one or more .alpha.-olefins, having a propylene content of at least 50 mol %, andB) from 5 to 30% by weight of a highly amorphous polypropylene having a crystalline polypropylene fraction of up to 10% by weight with an enthalpy of fusion of not more than 40 J/g and a melt flow index between 0.1 and 100 g/10 min, it being possible for the polypropylene to be a homopolymer of propylene or a copolymer of propylene with one or more .alpha.-olefins, having a propylene content of at least 80 mol %.Type: GrantFiled: October 16, 1996Date of Patent: November 11, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Markus Gahleitner, Klaus Bernreitner, Norbert Hafner, Kurt Hammerschmid, Hermann Heinemann
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Patent number: 5681922Abstract: Process for increasing the proportion of the .beta.-modification in polypropylenes, in which the polypropylenes are melted together with dicarboxylic acid salts of metals of the 2nd main group of the Periodic Table as .beta. nucleating agents and optionally with further conventional additives and are cooled, and polyropylenes which contain dicarboxylic acid salts of metals of the 2nd main group of the Periodic Table as .beta. nucleating agents.Type: GrantFiled: November 12, 1996Date of Patent: October 28, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Johannes Wolfschwenger, Klaus Bernreitner
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Patent number: 5665820Abstract: Elastomeric polypropylenes modified by grafting and blends thereof with isotactic polypropylenes modified by grafting, and the use thereof as compatibilizers or adhesion promoters for blends and metal composites.Type: GrantFiled: October 11, 1995Date of Patent: September 9, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Dirk Leistner, Manfred Ratzsch, Achim Hesse, Norbert Hafner, Markus Gahleitner, Klaus Bernreitner
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Patent number: 5650179Abstract: An apparatus for pelletizing a polymer melt, in which the polymer melt to be pelletized is divided in a housing of a pelletizing device into at least two part-streams, which are deflected and fed to at least two die plates which are spatially separate from one another and are heatable, whereupon the polymer melt streams are transformed into pellets by the cutting devices downstream of the die plates and are post-treated by means of a cooling medium.Type: GrantFiled: August 22, 1995Date of Patent: July 22, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventor: Helge Schier
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Highly active catalysts for olefin polymerization and a polymerization process using these catalysts
Patent number: 5629255Abstract: Highly active catalysts, for olefin polymerization, from tetraneophylzirconium and partly hydroxylated metal oxides from group IIa, IIIa, IVa or IVb of the Periodic Table, which are essentially free from by-products.Type: GrantFiled: September 21, 1995Date of Patent: May 13, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Norbert Hafner, Wilfried T oltsch, Hans Ledwinka, Wolfgang Neissl -
Patent number: 5596076Abstract: Process for the preparation of elastomeric, non-agglomerated, powdery/crumbly polypropylene by polymerization of propylene, if appropriate together with other olefins as comonomers, in liquid propylene and subsequent precipitation of the polypropylenes formed with CO.sub.2 or a polar solvent of which the polar term "delta p" of the solubility parameter according to Hansen is greater than 5 and the total solubility parameter "delta" is less than 30.Type: GrantFiled: May 19, 1994Date of Patent: January 21, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Norbert Hafner, Friedrich Mitter, Hans Ledwinka, Elisabeth Bruckm uller, Josef Kurz
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Patent number: 5592874Abstract: A double belt press for the continuous manufacture of material webs. The press includes pressing belts which are supported by support strips mounted on pressing plates. The support strips form pressure chambers which receive fluid pressure media for acting on a surface of the pressing belt.Type: GrantFiled: September 14, 1994Date of Patent: January 14, 1997Assignee: PCD Polymere Gesellschaft m.b.H.Inventor: Wilfried Blauhut
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Patent number: 5585435Abstract: Process for the preparation of grafted polyolefins in a fluidized bed fluidized by means of steam and, if appropriate, alcohols.Type: GrantFiled: September 25, 1995Date of Patent: December 17, 1996Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Manfred R atzsch, Achim Hesse, Hartmut Bucka
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Patent number: 5521265Abstract: Metallocenes of the formula ##STR1## where M is a metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta or an element selected from the group of the lanthanides, X.sub.1 and X.sub.2 are each an alkyl, alkoxy, aryl, aryloxy, alkenyl, arylalkyl, alkylaryl or arylalkenyl group, hydrogen or halogen and L.sub.1 and L.sub.2 are each a hydrocarbon which can form a sandwich structure with M, where at least L.sub.1 or L.sub.2 is substituted by or condensed with a ferrocene or ruthenocene radical. R.sub.1 is C, Si, Ge or Sn or the whole bridge A(R.sub.1).sub.n B is a biphenylene radical which is unsubstituted or substituted by A and/or B, A and B have the meanings of X.sub.1 and X.sub.2, n is an integer from 0 to 4.Type: GrantFiled: March 22, 1995Date of Patent: May 28, 1996Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Herwig Schottenberger, Michael Buchmeiser, Olaf Elsner, Eberhard Ernst, Jens Reussner, Wolfgang Neissl, Herbert Angleitner
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Patent number: 5231148Abstract: Mixture containing at least 70% by weight of polyhydroxyalkanoate and one or more compounds which contain reactive alcohol and/or acid groups, mixtures of poly-D (-)-3-hydroxybutyric acid with a polyether being excluded, process for the preparation of a polymer by melting the above mixture and a polymer in which at least some of the acid and/or alcohol groups of the polyhydroxyalkanoate are bonded via ester bonds to alcohol and/or acid groups of the admixed compound.Type: GrantFiled: November 19, 1991Date of Patent: July 27, 1993Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Andreas Kleinke, Karl-Heinz Reichert, Roman Bradel
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Patent number: 5213976Abstract: Process for extracting polyhydroxyalkanoates from the cell material of microorganisms by adding an organic solvent for the polyhydroxyalkanoate which is immiscible with water and which has a boiling point of below 100.degree. C., and, if appropriate, by adding water; stirring the resulting extraction mixture, if appropriate with refluxing; separating off the aqueous phase which contains the cell material in undissolved form from the organic phase; and injecting the organic phase into hot water, causing the dissolved polyhydroxyalkanoate to precipitate and the organic solvent to evaporate, and also isolating the precipitated polyhydroxyalkanoate flocs.Type: GrantFiled: September 17, 1991Date of Patent: May 25, 1993Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Wilfried Blauhut, Wolfgang Gierlinger, Friedrich Strempfl
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Patent number: 5183666Abstract: Pressing containing homo- and/or copolymers of D(-)-3-hydroxybutyric acid, at least one solid disintegrant and at least one solid pharmaceutical active compound, process for its production and the use of homo- and/or copolymers of D(-)-3-hydroxybutyric acid for the production of such a pressing.Type: GrantFiled: October 31, 1990Date of Patent: February 2, 1993Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Brigitta Korsatko-Wabnegg, Werner Korsatko
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Patent number: 5149644Abstract: Process for releasing poly(3-hydroxy carboxylic acid) granules from cells of Gram-negative bacteria containing the latter, by expression of a cloned natural or chimeric lysis gene, in which, before induction of lysis gene expression, the ionic strength of doubly charged cations is increased to between 0.05 and 0.5 mol/1, the expression of the lysis gene is induced by raising the temperature, the cells are harvested, and the still wet cells are resuspended in water or buffer solutions, which results in the release of the polymer granules by spontaneous lysis.Type: GrantFiled: December 26, 1990Date of Patent: September 22, 1992Assignee: PCD Polymere Gesellschaft m.b.H.Inventor: Werner Lubitz
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Patent number: 5130444Abstract: Bismaleimides of the formula I ##STR1## wherein R denotes a radical of the formula II ##STR2## and polyimides which can be prepared from these bismaleimides, if appropriate with the addition of an aromatic diamine. The polyimides are optionally reinforced with fibers.Type: GrantFiled: April 24, 1990Date of Patent: July 14, 1992Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Heinz Horacek, Gerd Greber
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Patent number: 5128144Abstract: Pressing having sustained release of active compound for the oral or parenteral administration of medicaments, which contains at least one solid pharmaceutical active compound, polylactic acid and a homo- or copolymer of D(-)-3-hydroxybutyric acid and processes for its production.Type: GrantFiled: September 25, 1990Date of Patent: July 7, 1992Assignee: PCD Polymere Gesellschaft m.b.H.Inventors: Brigitta Korsatko-Wabnegg, Werner Korsatko