Patents by Inventor Uwe Westeppe
Uwe Westeppe 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: 5145911Abstract: A thermoplastic molding composition comprising (i) an aromatic polycarbonate having high thermal dimensional stability and based on a substituted dihydroxydiphenylcycloalkane, (ii) other aromatic polycarbonate resin and (iii) graft, particle-type diene rubbers is disclosed. The composition is characterized by its good Izod impact strength. A process for preparing the molding composition and their use for manufacturing molded bodies are also disclosed.Type: GrantFiled: June 6, 1990Date of Patent: September 8, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Dieter Freitag, Uwe Westeppe, Dieter Wittmann
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Patent number: 5137970Abstract: A molding composition comprising a mixture of an aromatic polycarbonate based on a substituted dihydroxy diphenylcyclohexane, a copolymer of a resin forming vinyl monomer and a graft polymer of a resin forming monomer onto a diene rubber, and a process for its manufacture and use for making heat resistant shaped articles are disclosed.Type: GrantFiled: June 4, 1990Date of Patent: August 11, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Dieter Wittmann, Dieter Freitag, Uwe Westeppe, Karl-Heinz Ott
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Patent number: 5134195Abstract: The invention relates to ternary thermoplastic mixtures of polycarbonates, polyurethanes and graft polymers and, optionally, standard additives and to processes for the production of these mixtures.Type: GrantFiled: July 30, 1990Date of Patent: July 28, 1992Assignee: Bayer AktiengesellschaftInventors: Peter Tacke, Werner Nouvertne, Franz-Josef Gielen, Dieter Freitag, Ulrich Grigo, Uwe Westeppe
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Patent number: 5132154Abstract: An article for an optical application is disclosed comprisinga) about 0.1 to 99.9 wt. % of a thermoplastic, aromatic polycarbonate resin containing carbonate structural units corresponding to (Ia): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl; m represents an integer of from 4 to 7;R.sup.3 and R.sup.4, which are selected individually for each X, independently represent hydrogen or C.sub.1 -C.sub.6 alkyl; andX represents a carbon atom;provided that R.sup.3 and R.sup.4 both represent alkyl on at least one X atom; andb) from 99.9 to 0.1 wt. % of at least one thermoplastic polycarbonate other than component (a).Type: GrantFiled: May 31, 1990Date of Patent: July 21, 1992Assignee: Bayer AktiengesellschaftInventors: Uwe Westeppe, Gunther Weymans, Dieter Freitag, Karsten-Josef Idel
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Patent number: 5128437Abstract: The invention relates to the use of the diphenol corresponding to formula (I) ##STR1## for the production of high molecular weight, thermoplastic, aromataic polycarbonates, to a process for the production of these polycarbonates and to the new thermoplastic having improved heat resistance obtainable by the process.Type: GrantFiled: October 12, 1990Date of Patent: July 7, 1992Assignee: Bayer AktiengesellschaftInventors: Uwe Westeppe, Hans-Josef Buysch, Ulrich Grigo, Klaus Berg
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Patent number: 5126404Abstract: Thermoplastic molding composition comprisingA. 5 to 99% by weight (based on A+B) of a polycarbonate based on substituted dihydroxydiphenyl cycloalkanesB. 1 to 95% by weight (based on A+B) of a graft polymer prepared by a special process of5 to 90 parts by weight of a mixture ofB.1.1. 50 to 95 parts by weight styrene, .alpha.-methyl styrene, C.sub.1-4 alkyl- or halogen-nucleus-substituted styrenes, C.sub.1-8 alkyl methacrylates, C.sub.1-8 alkyl acrylates or mixtures thereof andB.1.2. 5 to 50 parts by weight acrylonitrile, methacrylonitrile, C.sub.1-8 alkyl methacrylates, C.sub.1-8 alkyl acrylates, maleic anhydride, C.sub.1-4 alkyl-N-maleic imides, phenyl-N-maleic imides or mixtures thereof onB.2. 10 to 95 parts by weight of a diene rubber having an average particle diameter d50 of from 0.09 to 1 .mu.m and a gel content of more than 50% by weight and optionally at least one other thermoplastic resin which replaces up to 75% by weight of the polycarbonate A.Type: GrantFiled: May 1, 1990Date of Patent: June 30, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Dieter Wittmann, Christian Lindner, Uwe Westeppe
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Patent number: 5126428Abstract: Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkyl andX represents carbon with the proviso that, at least one atom X, bothR.sup.3 and R.sup.4 are alkyl,a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.Type: GrantFiled: October 15, 1990Date of Patent: June 30, 1992Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Claus H. Wulff, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans, Lutz Schrader, Werner Waldenrath
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Patent number: 5122571Abstract: This invention relates to new thermoplastic moulding compounds of polyamides, graft polymers containing tert.-butylacrylate in the shell and optionally also rubber polymers as impact strength modifiers.Type: GrantFiled: September 11, 1989Date of Patent: June 16, 1992Assignee: Bayer AktiengesellschaftInventors: Uwe Westeppe, Karl-Erwin Piejko, Rolf-Peter Muller, Gerd Fengler, Christian Lindner
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Patent number: 5115050Abstract: The invention relates to a process for the preparation of polyamide moulding compositions containing 0.1 to 40 wt. % of a polyarylene sulphide by reaction of polyamide-forming components in the presence of polyarylene sulphides.Type: GrantFiled: April 23, 1990Date of Patent: May 19, 1992Assignee: Bayer AktiengesellschaftInventors: Werner Nielinger, Karsten-Josef Idel, Uwe Westeppe, Dieter Freitag, Claus Wulff, Hans-Detlef Heinz
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Patent number: 5109076Abstract: Thermoplastic polydiorganosiloxane/polycarbonate block copolymers based on dihydroxydiphenylcycloalkanes corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 or C.sub.6 cycloalkyl, C.sub.5 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, in particular benzyl: m represents an integer of from 4 to 7, preferably 4 or 5;R.sup.3 and R.sup.4 may be chosen individually for each X and independently represent hydrogen or C.sub.1 -C.sub.12 alkyl; andX represents carbon; with the proviso that R.sup.3 and R.sup.4 both represent alkyl on at least one atom X,having an average molecular weight M.sub.w (weight average) of 10 000 to 300 000, a content of aromatic polycarbonate of 21 to 99.5% by weight and a content of polyorganosiloxane of 79 to 0.5% by weight.Type: GrantFiled: December 13, 1989Date of Patent: April 28, 1992Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Alfred Jung, Peter Horlacher, Gunther Weymans, Ulrich Grigo, Leo Morbitzer, Karsten-Josef Idel
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Patent number: 5105004Abstract: The new aromatic ethers of the formulae ##STR1## can be used for the preparation of plastics which, in turn, can be processed further to give moulded articles, films, foils and filaments. The plastics prepared from the new aromatic ethers are distinguished by exceptional dimensional stability under heat.Type: GrantFiled: November 13, 1990Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Knud Reuter, Dieter Freitag, Gunther Weymans, Rolf Dhein, Paul J. Mayska, Karsten-Josef Idel, Volker Eckhardt, Uwe Westeppe
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Patent number: 5104963Abstract: A process for the preparation of a phenol and solvent free polycarbonate resin is disclosed comprising(i) forming an oligomeric polycarbonate comprising structural units based on a diphenol corresponding to ##STR1## wherein R.sup.1 and R.sup.2 independently of one another denote a member selected from the group consisting of a hydrogen atom, a halogen atom, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl, C.sub.6-10 aryl and C.sub.7-12 aralkyl radicals,m is an integer of from 4 to 7,X represents carbon andR.sup.3 and R.sup.4 are individually selected for each X and independently of one another represent a hydrogen atom or a C.sub.1-6 alkyl radical, with the proviso that for at least one X atom, both R.sup.3 and R.sup.4 are alkyl radicals, and(ii) condensing said oligomeric polycarbonate at a temperature in the range of of 140 to 350.degree. C.Type: GrantFiled: December 4, 1990Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Uwe Westeppe, Dieter Freitag, Gerd Fengler, Ulrich Grigo
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Patent number: 5104723Abstract: Mixtures containinga) thermoplastic polycarbonates based on diphenols corresponding to formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and c.sub.7 -C.sub.12 aralkyl,m is an integer of from 4 to 7,R.sup.3 and R.sup.4 may be individually selected for each X and independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkyl andX represents carbon, with the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl, andb) elastomers or other thermoplastics than those of component a) and, optionally,c) standard additives,processes for their preparation, and the use thereof for the production of films.Type: GrantFiled: October 3, 1989Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Uwe Westeppe, Kurt Weirauch, Gunther Weymans
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Patent number: 5104945Abstract: Thermoplastic molding compositions comprising mixtures ofa) 1-99 wt. % of a specific polycarbonate based on dihydroxydiphenylcycloalkanes,b) 1-99 wt. % of other polycarbonate, in particular those based on bisphenol A, andc) 1-95 wt. % of a silicone rubber, in particular silicone graft rubbers,having improved thermal resistance and being suitable for the preparation of shaped articles, and a process for their preparation are being disclosed.Type: GrantFiled: April 17, 1990Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Dieter Wittmann, Dieter Freitag, Uwe Westeppe, Karl-Heinz Ott
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Patent number: 5100960Abstract: The invention relates to a thermoplastic molding composition comprising(A) from 10 to 98 parts by weight of a polydiorganosiloxane-polycarbonate block copolymer having a weight average molecular weight of from 10,000 to 200,000 and containing from 75 to 97.5 wt. % of aromatic carbonate structural units and from 25 to 2.5 wt. % of polydiorganosiloxane structural units;(B) from 2 to 90 parts by weight of a thermoplastic, aromatic polycarbonate having a weight average molecular weight of at least 10,000, andcontaining bifunctional carbonate structural units corresponding to ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl;m represents an integer of from 4 to 7,R.sup.3 and R.sup.4, which may be selected individually for each X, independently represent hydrogen or C.sub.1 -C.sub.6 alkyl; andx represents carbon,with the proviso that, on at least one atom X, R.sup.3 and R.sup.Type: GrantFiled: March 12, 1990Date of Patent: March 31, 1992Assignee: Bayer AktiengesellschaftInventors: Ulrich Grigo, Peter Horlacher, Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe, Wolfgang Beer, Werner Nouvertne
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Patent number: 5086159Abstract: Copolycarbonates derived from known bisphenols and small quantities of dihydroxydiphenyl cycloalkanes corresponding to formula (I) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, preferably phenyl, and C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, in particular benzyl,m denotes an integer with a value from 4 to 7, preferably 4 or 5,R.sup.3 and R.sup.4, which are selected independently for each X, denote, independently of one another, hydrogen or C.sub.1 to C.sub.6 alkyl, andX denotes carbon under the condition that R.sup.3 and R.sup.4 are both alkyl on at least one X atoms are disclosed. These copolycarbonates are characterized by their improved processing stability.Type: GrantFiled: August 15, 1990Date of Patent: February 4, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Herbert Fritsch, Uwe Westeppe, Werner Nouvertne, Dieter Freitag
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Patent number: 5068302Abstract: Polydiorganosiloxane-polycarbonate block copolymers based on dihydrodiphenylcycloalkanes corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2 independently of one another represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl, C.sub.6-10 aryl and C.sub.7-12 aralkyl, preferably phenyl-C.sub.1-4 -alkyl, more especially benzyl,n=2 or 3 andthe substituents R.sup.5 independently of one another are hydrogen or C.sub.1-12 alkyl, with the proviso that at least one of the substituents R.sup.5 is not hydrogen,having an average molecular weight M.sub.w (weight average) in the range from 10,000 to 300,000 (as measured by ultracentrifugation or scattered light measurement) and a content of carbonate containing dihydroxydiphenylcycloalkanes of formula I and, optionally, other diphenols in co-condensed form of from 75% by weight of 99.Type: GrantFiled: August 8, 1990Date of Patent: November 26, 1991Assignee: Bayer AktiengesellschaftInventors: Peter Horlacher, Volker Serini, Dieter Freitag, Ulrich Grigo, Karsten-Josef Idel, Uwe Westeppe
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Patent number: 5041521Abstract: Polyesters and polyester-carbonates based on dihydroxydiphenylcycloalkanes corresponding to the following general formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, a C.sub.1 -C.sub.12 hydrocarbon radical or halogen; m represents an integer of from 4 to 7,R.sup.5, and R.sup.6, may be selected individually for each X and independently represent hydrogen or C.sub.1 -C.sub.6 alkyl; andX represents carbon;with the proviso that, on at least one atom X, R.sup.5 and R.sup.6 simultaneously represent alkyl.Type: GrantFiled: January 30, 1990Date of Patent: August 20, 1991Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Dieter Freitag, Ulrich Grigo, Uwe Westeppe
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Patent number: 5025065Abstract: Fire-retardant polycarbonates, polyester carbonates and polyesters based on dihydroxydiphenyl cycloalkanes ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, preferably phenyl and C.sub.7 -C.sub.12 aralkyl, preferably phenyl-C.sub.1 -C.sub.4 -alkyl, more especially benzyl,m is an integer of 4 to 7, preferably 4 or 5, R.sup.3 and R.sup.4 may be individually selected for each X and, independently of one another, represent hydrogen or C.sub.1 -C.sub.6 alkyl andX is carbon,with the proviso that, at at least one atom X, R.sup.3 and R.sup.4 are both alkyl,the fire-retardant finish being provided by additives and/or comonomers.Type: GrantFiled: April 4, 1990Date of Patent: June 18, 1991Assignee: Bayer AktiengesellschaftInventors: Peter Tacke, Ulrich Grigo, Werner Nouvertne, Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe
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Patent number: 5021542Abstract: Thermoplastic aromatic polycarbonates having average molecular weights Mw of at least 10,000 which contain bifunctional carbonate structural units corresponding formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 independently of one another represent hydrogen, a C.sub.1-12 hydrocarbon, halogen,Y.sup.1, Y.sup.2, Y.sup.3 independently of one another represent hydrogen,C.sub.1-5 alkyl, a C.sub.6-12 hydrocarbon radical,at least two of the substituents Y.sup.1, Y.sup.2 and Y.sup.3 not being hydrogen and at least one of the substituents Y.sup.1, Y.sup.2 and Y.sup.3 being C.sub.1-5 alkyl,in quantities of from 100 to 1 mol-%, based on the total quantity of difunctional carbonate structural units in the polycarbonate.Type: GrantFiled: December 13, 1989Date of Patent: June 4, 1991Assignee: Bayer AktiengesellschaftInventors: Volker Serini, Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe, Ulrich Grigo, Klaus-Christian Paetz