Patents by Inventor Karl Zabrocki
Karl Zabrocki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6828380Abstract: A molding composition having good surface gloss, high elongation at break and good thermoplastic processability is disclosed. The composition contains (A) a graft polymer that is obtained by free-radical polymerization of resin-forming vinyl monomers in the presence of rubber in latex form, (B) a copolymer of styrene and acrylonitrile and an optional (C) a resin selected from the group consisting of polycarbonates, polyester-carbonates, polyesters and polyamides. The preparation of the graft polymer is characterized in that (i) before the start of the grafting polymerization reaction the rubber latex is brought to a pH of 9 to 11, (ii) the redox initiator components are employed in amounts of 0.1 to 2.5 wt. % (based on the monomers metered in) and (iii) during the entire grafting polymerization reaction the pH remains constant±0.5 and in the range of 11.0 to 8.8, and (iv) the temperature difference between the start and end of the reaction is at least 10° C.Type: GrantFiled: November 21, 2002Date of Patent: December 7, 2004Assignee: Bayer AktiengesellschaftInventors: Liqing-Lee Sun, Eckhard Wenz, Herbert Eichenauer, Stefan Moss, Heinrich Alberts, Hans-Bernhard Hauertmann, Karl Zabrocki, Hans-Erich Gasche, Ulrich Jansen
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Publication number: 20030153678Abstract: The invention provides compositions comprising a graft polymer obtainable by free-radical polymerization, a vinyl (co)polymer and optionally resins chosen from the group consisting of polycarbonates, polyester-carbonates, polyesters and polyamides, characterized in that the preparation of the graft polymer A) is carried out by a procedure in which before the start of the grafting polymerization reaction the rubber latex is brought to a pH of 9 to 11, the redox initiator components are employed in amounts of 0.1 to 2.5 wt. % (based on the monomers metered in) and during the entire grafting polymerization reaction the pH should not exceed a value of 11.0 and should not fall below a value of 8.8 and the pH remains constant during the reaction within a range of variation of ±0.5 units, and the temperature difference between the start and end of the reaction is at least 10° C.Type: ApplicationFiled: November 21, 2002Publication date: August 14, 2003Inventors: Liqing-Lee Sun, Eckhard Wenz, Herbert Eichenauer, Stefan Moss, Heinrich Alberts, Hans-Bernhard Hauertmann, Karl Zabrocki, Hans-Erich Gasche, Ulrich Jansen
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Patent number: 4920178Abstract: An .alpha.-methylstyrene/acrylonitrile copolymer obtainable by emulsion polymerization which, in combination with other polymers, particularly PVC, enables alloys of outstanding thermal stability and color stability to be produced and, in addition, has a high heat distortion temperature and shows good fogging behavior and which is obtained by radically initiated inflow copolymerization of a mixture of 30 to 32 parts by weight acrylonitrile and 68 to 70 parts by weight .alpha.-methylstyrene in the presence of an emulsifier containing carboxyl groups. The polymerization is conducted in such a way that a seed latex of the same copolymer or of an analogous copolymer is introduced before addition of the monomers is commenced, the reaction temperature is kept between 75.degree. and 82.degree. C. and the molar ratio of emulsifier to initiator is between 4 and 6.Type: GrantFiled: February 21, 1989Date of Patent: April 24, 1990Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Christian Lindner, Otto Koch, Hans-Eberhard Braese
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Patent number: 4755576Abstract: Copolymers of from 65 to 75%, by weight, of .alpha.-methyl styrene and from 35 to 25%, by weight, of .alpha.-methyl styrene and from 35 to 25%, by weight, of acrylonitrile, obtainable by radical emulsion polymerization, the monomers being metered in during the course of the polymerization, wherein the molar ratio: ##EQU1## of the unreacted monomers in the reaction mixture is maintained during the metering phase between 0.7 and 1.25.Type: GrantFiled: August 14, 1985Date of Patent: July 5, 1988Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Rainer Fritz, Alfred Pischtschan
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Patent number: 4668737Abstract: A graft product of from 40 to 99.8 parts by weight of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, methyl methacrylate or mixtures thereof, from 20 to 0.1 part by weight of a vinyl-group-containing, preferably heterocyclic nitrogen base, from 20 to 0.1 part by weight of a mono- or di-acid containing a polymerizable double bond and from 0 to 49 parts by weight of acrylonitrile on a particulate rubber having an average particle diameter (d.sub.50) of from 0.05 to 20.0 .mu.m and a glass temperature of .ltoreq.10.degree. C., the total rubber content amounting to between 5 and 80% by weight.Type: GrantFiled: May 30, 1985Date of Patent: May 26, 1987Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Karl Zabrocki, Joachim D/o/ ring, Karl-Heinz Ott, Ludwig Bottenbruch
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Patent number: 4600747Abstract: ABS-moulding compositions consisting of a thermoplastic copolymer and a graft polymer with rubber-like graft base exhibit an improved flame resistance if the total mixture contains a compound corresponding to the formulae ##STR1## polymerized into one or both components, wherein R.sub.1 represents C.sub.2 -C.sub.6 -alkylene,R.sub.2 represents hydrogen or methyl,R.sub.3 represents a direct bond or C.sub.1 -C.sub.4 -alkylene, andR.sub.4 represents hydrogen, methyl or CH.sub.2 --OOC--CH.sub.2 --CO--CH.sub.3.Type: GrantFiled: April 18, 1985Date of Patent: July 15, 1986Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Christian Lindner, Friedmann Muller, Joachim Doring
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Patent number: 4581409Abstract: The invention relates to ABS moulding compositions based on selected copolymers and, optionally graft polymers of olefinically unsaturated monomers which are suitable for the preparation of ABS and silicon derivatives which are capable of copolymerization, the flame resistant properties of these moulding compositions being improved in comparison with conventional ABS material.Type: GrantFiled: October 17, 1984Date of Patent: April 8, 1986Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Friedemann Muller, Joachim Doring
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Patent number: 4579906Abstract: The invention relates to flame-resistant ABS moulding materials containing a fluoro-organic polymer besides customary flameproofing additives and to a process for their manufactures.Type: GrantFiled: January 23, 1985Date of Patent: April 1, 1986Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Christian Lindner, Hubert Bosshammer, Bernd Urbannek
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Patent number: 4548987Abstract: ABS-polycarbonate mixtures consisting of an aromatic polycarbonate A, a graft polymer B having a rubber-like graft base and optionally a thermoplastic copolymer C have improved flame resistance if the total mixture contains a compound corresponding to the formulae ##STR1## wherein R.sub.1 represents C.sub.2 -C.sub.6 alkylene,R.sub.2 represents hydrogen or methyl,R.sub.3 represents a direct bond or C.sub.1 -C.sub.4 alkylene, andR.sub.4 represents hydrogen, methyl orCH.sub.2 --OOC--CH.sub.2 --CO--CH.sub.3Polymerized in B or C or in B and C.Type: GrantFiled: September 5, 1984Date of Patent: October 22, 1985Assignee: Bayer AktiengesellschaftInventors: Wolfgang Bauer, Christian Lindner, Friedemann Muller, Hans-Jurgen Kress, Karl Zabrocki, Josef Buekers
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Patent number: 4547533Abstract: Glass-fiber-reinforced ABS-molding compositions comprising(a) from 60 to 98% by weight of an ABS-plastic;(b) from 2 to 40% by weight of sized glass fiber; and(c) from 0 to 5% by weight of one or more additives,the glass fiber being treated with a size which contains a polymer containing epoxide groups and a copolymer of, on the one hand, styrene, nuclear-methylated styrene, .alpha.-methyl styrene, methylmethacrylate or a mixture thereof and, on the other hand, acrylonitrile.Type: GrantFiled: June 27, 1984Date of Patent: October 15, 1985Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Christoph Tiburtius, Joachim Doring, Klaus Richter
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Patent number: 4520165Abstract: 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.Type: GrantFiled: January 30, 1984Date of Patent: May 28, 1985Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Karl-Heinz Ott, Adolf Schmidt, Alfred Pischtschan
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Patent number: 4442264Abstract: This invention relates to graft rubbers obtained by the radical polymerization of one or more vinyl-group-containing monomers in the presence of at least one rubber, the polymerization reaction being carried out in the presence of from 0.001 to 1.0% by weight (based on solid graft product) of at least one compound corresponding to the following formula (I): ##STR1## in which X=CL or NO.sub.2Y.sup.1, Y.sup.2 =H, C.sub.1 -C.sub.10 -alkyl, NO.sub.2, F, Cl, Br, and to the use of the graft rubbers according to the invention for the production of rubber-modified thermoplastic moulding compositions.Type: GrantFiled: May 2, 1983Date of Patent: April 10, 1984Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Alfred Pischtschan
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Patent number: 4360452Abstract: An emulsifier composition comprising (a) a non-ionic emulsifier having an HLB-value of about 10 to 20 and (b) a polyoxyalkylene-polyester of which about 5 to 50% by weight comprises polyoxyalkylene radicals. It may be used in admixture with phosphoric acid esters, serving to reduce foaming and prevent settling of aqueous suspensions such as cement and calcium sulfate slurries.Type: GrantFiled: July 18, 1980Date of Patent: November 23, 1982Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Kurt Schaupp
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Patent number: 4331573Abstract: Melts of Urethane-modified oligoesters and 1 or polyesters can easily be dispersed in an aqueous phase in the presence of a dispersing agent combination comprising a polyether-modified polyester and a non-ionic dispersing agent having a particular HLB value.Type: GrantFiled: July 9, 1980Date of Patent: May 25, 1982Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Ludwig Bottenbruch, Franz Weider
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Patent number: 4321170Abstract: Aqueous dispersions of polyesters or alkyd resins for coatings are prepared by co-condensation of 10 to 100 mol-%, calculated on the sum of polybasic carboxylic acids, of polybasic acids whose carboxyl groups are attached to secondary and/or tertiary carbon atoms. Said dispersions are excellently stable and yield coatings with outstanding properties.Type: GrantFiled: November 14, 1980Date of Patent: March 23, 1982Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Rolf Dhein, Franz Weider, Klaus Hohne, Kurt Schorn
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Patent number: 4318832Abstract: An aqueous dispersion of an epoxide compound comprising water, one or more water-insoluble 1,2-epoxide compounds having mol weights Mn of from between 150 and 3000 and an emulsifying system comprising:(A) from 9.5 to 35% by weight of at least one polyester resin containing carboxyl groups having an acid number of from 10 to 50 mg KOH/g substance and a molecular weight Mn of from 400 to 4000, at least 30% of the carboxyl groups being neutralized;(B) from 0.5 to 25% by weight of at least one emulsifier having an HLB-value.gtoreq.15 and represented by the formula: ##STR1## wherein R.sup.1 represents a C.sub.1 -C.sub.16 -alkyl group,R.sup.2 represents H or a C.sub.1 -C.sub.16 -alkyl group,R.sup.3 represents H or methyl,n represents a number from 10 to 50;(C) from 40 to 90% by weight of at least one emulsifier having an HLB-value of 15 and the general formula: ##STR2## wherein R.sup.2 is previously defined, R.sup.4 represents C.sub.1 -C.sub.Type: GrantFiled: August 25, 1980Date of Patent: March 9, 1982Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Hans Schulze, Franz Weider, Wolfgang Wellner, Wolfgang Schartau
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Patent number: 4031047Abstract: Non-aqueous polyester and alkyd resin stoving lacquers containing .epsilon.-caprolactam as a so-called reactive diluent with a high solids content and containing correspondingly small quantities of volatile solvents and yield excellently hard coatings which are not brittle.Type: GrantFiled: August 12, 1975Date of Patent: June 21, 1977Assignee: Bayer AktiengesellschaftInventors: Rolf Dhein, Karl Zabrocki, Wolfgang Beer, Rolf Kuchenmeister
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Patent number: 4022726Abstract: Stoving lacquer systems having a high solids content contain a binder consisting of carboxyl and hydroxyl group-containing polyester or alkyd resin including an .epsilon.-caprolactone as a "reactive diluent", and an aminoplast resin as a cross-linking agent.Type: GrantFiled: July 8, 1975Date of Patent: May 10, 1977Assignee: Bayer AktiengesellschaftInventors: Karl Zabrocki, Rolf Dhein, Rolf Kiichenmeister, Wolfgang Beer