Patents by Inventor Konrad Mitulla
Konrad Mitulla 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: 8470911Abstract: A process is proposed for coagulation of an aqueous polymer dispersion, which comprises, during or after the coagulation, converting the dissolved coagulation salt into an insoluble form.Type: GrantFiled: April 3, 2007Date of Patent: June 25, 2013Assignee: Styrolution GmbHInventors: Chris Dearmitt, Graham Edmund McKee, Konrad Mitulla
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Publication number: 20090062448Abstract: A process is proposed for coagulation of an aqueous polymer dispersion, which comprises, during or after the coagulation, converting the dissolved coagulation salt into an insoluble form.Type: ApplicationFiled: April 3, 2007Publication date: March 5, 2009Applicant: BASF SEInventors: Chris DeArmitt, Graham Edmund Mc Kee, Konrad Mitulla
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Publication number: 20060020061Abstract: The invention relates to thermoplastic moulded masses containing, a) at least one block copolymer (A), comprising, with relation to (A), a1) 50 to 90 wt. % of at least one styrol monomer, a2) 10 to 50 wt. % of at least one diene monomer, with the following as stabilisers, relative to the moulded mass, b) 0.001 to 0.18 wt. % of at least one benzofuranone derivative (B), c) 0.05 to 1 wt. % of at least one organic phosphite (C), and d) 0.1 to 0.3 wt. % of at least one stabiliser compound (D), selected from sterically hindered phenols and aromatic amines.Type: ApplicationFiled: July 25, 2003Publication date: January 26, 2006Applicant: BASF AKTIENGESELLSCHAFT Patents, Trademarks and LicensesInventors: Konrad Knoll, Ulrike Dardin, Philippe Desbois, Konrad Mitulla, Paul Naegele
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Publication number: 20050090703Abstract: Styrene is recovered continuously from a styrene-containing mixture by distillation of the mixture in a cascade of n distillation columns, where (i) a feed stream comprising a stabilizer system is fed into the first column and/or a stabilizer system is introduced into at least one distillation column upstream of the nth distillation column, where the stabiliser system comprises N-oxyl radicals; (ii) a high boiler fraction having a boiling point higher than that of styrene and comprising the stabilizer system accumulates in the bottom of the nth distillation column; (iii) a substream of the high boiler fraction is recirculated and introduced into at least one distillation column upstream of the nth distillation column; (iv) the remainder of the high boiler fraction is discharged from the process.Type: ApplicationFiled: November 18, 2004Publication date: April 28, 2005Applicant: BASF AktiengesellschaftInventors: Konrad Mitulla, Heinz Sutoris
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Patent number: 6835288Abstract: A process for preventing undesired polymerization is conducted by maintaining an effective concentration of a stabilizer which comprises N-oxyl radicals in a mixture containing ethylenically unsaturated compounds, wherein (i) an electronic signal which correlates with the concentration of the N-oxyl radicals in the mixture is obtained periodically or continuously, (ii) the electronic signal is compared with a reference value, and (iii) addition of a stabilizer to the mixture is controlled according to the comparison (ii). The signal is preferably obtained by ESR measurement. The process permits efficient use of the stabilizer.Type: GrantFiled: December 11, 2001Date of Patent: December 28, 2004Assignee: BASF AktiengesellschaftInventors: Heinz Friedrich Sutoris, Konrad Mitulla
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Publication number: 20040019247Abstract: Styrene is recovered continuously from a styrene-containing mixture by distillation of the mixture in a cascade of n distillation columns, whereType: ApplicationFiled: September 5, 2003Publication date: January 29, 2004Applicant: BASF AktiengesellschaftInventors: Konrad Mitulla, Heinz Friedrich Sutoris
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Patent number: 6475348Abstract: A mixture contains one or more vinyl-containing compounds as component (A) and, as a further component, a stabilizer (B) which contains one or more readily volatile nitroxyl compounds as component (b1), one or more sparingly volatile nitroxyl compounds as component (b2), if required one or more aromatic nitro compounds as component (b3) and, if required, one or more iron compounds as component (b4). Stabilizers (B) contain the components (b1) and (b2), (b1) and (b2) and (b3), (b1) and (b2) and (b4), and (b1), (b2), (b3) and (b4), and the premature polymerization of vinyl-containing compounds during their purification or distillation is inhibited by a process in which a stabilizer (B) is added or the components of stabilizer (B) are added as individual substances or in at least two groups of the components.Type: GrantFiled: December 17, 1999Date of Patent: November 5, 2002Assignee: BASF AktiengesellschaftInventors: Heinz Friedrich Sutoris, Konrad Mitulla, Jacques Dupuis, Claus Kaliba
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Patent number: 6200460Abstract: Substance mixtures comprising (A) vinyl-containing compounds, (B) an active amount of a mixture inhibiting the premature polymerization of the vinyl-containing compounds, comprising (i) at least one N-oxyl compound of a secondary amine which carries no hydrogen atoms on the &agr;-C atoms, and (ii) at least one iron compound, (C) if appropriate nitro compounds, and (D) if appropriate costabilizers, a process for inhibiting the premature polymerization of vinyl-containing compounds (A) and the use of mixture (B), if appropriate as a mixture with nitro compounds (C) and/or costabilizers (D), for inhibiting the premature polymerization of free radical polymerizable compounds and for stabilizing organic materials against the damaging action of free radicals.Type: GrantFiled: December 16, 1998Date of Patent: March 13, 2001Assignee: BASF AktiengesellschaftInventors: Heinz Friedrich Sutoris, Hermann Uhr, Konrad Mitulla, Jürgen Schröder, Roland Merger, Knut Kessel
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Patent number: 5922244Abstract: 4-Acylaminopiperidine N-oxides IaA.sup.1 B.sup.1 (Ia)where A.sup.1 is hydrogen or an organic radical and B.sup.1 is a radical IIa ##STR1## where R.sup.1 -R.sup.4 are each C.sub.1 -C.sub.4 -alkyl and R.sup.1 and R.sup.2, on the one hand, and R.sup.3 and R.sup.4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring,R.sup.5 is H or C.sub.1 14 C.sub.4 -alkyl andR.sup.6 is H or C.sub.1 -C.sub.18 -alkyl,are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.Type: GrantFiled: September 22, 1997Date of Patent: July 13, 1999Assignee: BASF AktiengesellschaftInventors: Andreas Koch, Alexander Aumuller, Konrad Mitulla, Gregor Tremmel, Holger Herbst
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Patent number: 4965318Abstract: Thermoplastic molding materials contain(A) from 5 to 95% by weight of a nylon and(B) from 5 to 95% by weight of a copolymer composed of(B.sub.1) from 50 to 99.9% by weight of a styrene of the general formula I ##STR1## where R.sup.1 is alkyl or 1 to 4 carbon atoms or hydrogen, R.sup.2 is alkyl of 1 to 6 carbon atoms or halogen and m is 0, 1, 2 or 3,(B.sub.2) from 0.1 to 30% by weight of a monomer containing epoxide groups (II) ##STR2## or of a monomer containing lactam groups (III) ##STR3## or of a monomer containing halobenzyl groups (IV) ##STR4## where R.sup.3 is a divalent, branched or straight-chain alkyl group of 2 to 15 carbon atoms, R.sup.4 is alkyl of not more than 6 carbon atoms, X is halogen, n is 1, 2 or 3 and r is 0, 1, 2 or 3, and(B.sub.3) from 0 to 48% by weight of further comonomers.Type: GrantFiled: July 14, 1988Date of Patent: October 23, 1990Assignee: BASF AktiengesellschaftInventors: Christof Taubitz, Erhard Seiler, Juergen Hambrecht, Konrad Mitulla, Horst Reimann
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Patent number: 4959415Abstract: Thermoplastic molding materials containing(A) not less than 5% by weight of a polyphenylene ether and(B) not less than 5% by weight of a nylon furthermore contain(C) not less than 0.1% by weight of a copolymer composed of(C.sub.1) not less than 30% by weight of a styrene of the general formula I ##STR1## where R and R.sup.1 are alkyl of 1 to 8 carbon atoms, hydrogen and/or halogen and n is 0, 1, 2 or 3,(C.sub.2) not less than 0.5% by weight of an epoxide-containing polymerizable monomer and/or(C.sub.3) not less than 0.05% by weight of a halobenzyl-containing polymerizable monomer possessing a structural unit (II) ##STR2## where X is halogen, R.sup.2 and R.sup.3 are each alkyl of 1 to 8 carbon atoms or hydrogen and n is 1, 2 or 3, and/or(C.sub.4) not less than 0.05% by weight of a polymerizable monomer containing oxazoline groups and(C.sub.Type: GrantFiled: April 11, 1988Date of Patent: September 25, 1990Assignee: BASF AktiengesellschaftInventors: Christof Taubitz, Erhard Seiler, Juergen Hambrecht, Konrad Mitulla, Klaus Boehlke
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Patent number: 4774286Abstract: Thermoplastic molding materials based on(A) polycarbonates and(B) polyesters containing from 1 to 30% by weight, based on (A)+(B)+(C),(C) of a graft copolymer based on(C.sub.1) from 60 to 99% by weight of an elastomeric component based on acrylic acid esters, methacrylic acid esters and/or conjugated dienes as well as, if desired, further comonomers, as graft base and(C.sub.2) from 1 to 40% by weight of an expoxy-containing monomer as applied graft.Type: GrantFiled: January 12, 1987Date of Patent: September 27, 1988Assignee: BASF AktiengesellschaftInventors: Christof Taubitz, Hans-Henning Hub, Konrad Mitulla, Manfred Knoll
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Patent number: 4743661Abstract: High molecular weight polyphenylene ethers are prepared from monohydric phenols by a conventional polycondensation, by a method in which the resulting polymers are reacted with an epoxide of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 can be identical or different and are each alkyl, cycloalkyl, aryl, aryloxy, alkoxy or carboxyalkyl, each of which may contain a further epoxide group, or C.sub.3 -C.sub.20 -alkyl-substituted amino, or R.sup.1 is hydrogen and R.sup.2 is one of the above groups, or R.sup.1 and R.sup.2 form part of a cycloalkyl ring.Type: GrantFiled: August 5, 1986Date of Patent: May 10, 1988Assignee: BASF AktiengesellschaftInventors: Konrad Mitulla, Juergen Hambrecht, Helmut Tesch, Burghard Schmitt, Hansjoachim Maeder
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Patent number: 4605699Abstract: A thermoplastic molding material consists of from 10 to 90 parts by weight of a polycarbonate A and from 90 to 10 parts by weight of a graft copolymer B having a mean particle size of from 200 to 700 nm (d.sub.50 value of the integral mass distribution). The graft polymer B is formed from an elastomer (rubber) (b.sub.1), which accounts for from 10 to 80% by weight, and a grafted shell (b.sub.2), which accounts for from 90 to 20% by weight, the percentages in each case being based on (B).The elastomer (b.sub.1) is composed of from 50 to 99.9% by weight of an alkyl acrylate, where alkyl is of 1 to 8 carbon atoms, and from 0.1 to 5% by weight of a copolymerizable polyfunctional crosslinking monomer.The grafted shell (b.sub.2) is produced in three stages and contains, as graft monomers,(b.sub.2 a.sub.1) from 5 to 40% by weight of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms,in the first stage,(b.sub.2 a.sub.Type: GrantFiled: April 11, 1985Date of Patent: August 12, 1986Assignee: BASF AktiengesellschaftInventors: Konrad Mitulla, Juergen Hambrecht, Adolf Echte, Johann Swoboda, Peter Siebel, Josef Schwaab, Herbert Frank
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Patent number: 4603169Abstract: A thermoplastic molding material consists of a polycarbonate A and a graft copolymer B, the latter consisting of an elastomer (rubber) (b.sub.1) and a shell (b.sub.2) grafted onto the elastomer.The elastomer (b.sub.1) contains, as copolymerized units, from 35 to 100% by weight of a diene from the group consisting of the conjugated dienes of 4 to 5 carbon atoms, and can contain, as copolymerized units, from 0 to 65% by weight of a monomer from the group consisting of the alkyl acrylates or alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms.The shell (b.sub.2) is obtained in a conventional manner by successive polymerization of the monomers constituting the shell, in two process steps, in the presence of the elastomer (b.sub.Type: GrantFiled: April 12, 1985Date of Patent: July 29, 1986Assignee: BASF AktiengesellschaftInventors: Konrad Mitulla, Juergen Hambrecht, Adolf Echte, Johann Swoboda, Peter Siebel