Patents by Inventor Hans-Eberhard Braese
Hans-Eberhard Braese 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: 5382625Abstract: Particulate graft polymers composed of a core (a) of cross-linked diene rubber, a first envelope (b) of a cross-linked acrylate rubber, a second envelope (c) of a copolymer of resin-forming monomers and polyallyl monomers having at least three allyl groups in the molecule, and a third envelope (d) of a copolymer or homopolymer of resin forming monomers.Type: GrantFiled: December 12, 1985Date of Patent: January 17, 1995Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Walter Uerdingen, Karl-Heinz Ott, hans-Eberhard Braese
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Patent number: 5344876Abstract: Molding compounds of acrylate polymers, optionally graft rubbers and/or optionally resin-like vinyl polymers containing 0.05 to 5% by weight tetrafluoroethylene polymers.Type: GrantFiled: December 29, 1992Date of Patent: September 6, 1994Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Hans-Eberhard Braese, Christian Lindner
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Patent number: 5252674Abstract: Graft polymers having graft shells of copolymers of styrenes, .alpha.-methyl styrenes, acrylonitrile, C.sub.1 -C.sub.4 vinyl carboxylic acids, C.sub.1 -C.sub.8 alkyl acrylates and/or alkyl methacrylates, maleic acid derivatives, vinyl(idene) chloride and mixtures thereof on the one hand and monomers corresponding to formula I ##STR1## in which R.sup.1 =H, CH.sub.3,R.sup.2 =C.sub.1 -C.sub.8 alkylene,R.sup.3 =C.sub.1 -C.sub.4 alkylon the other hand andgraft bases of particulate diene and/or acrylate rubbers having particle diameters (d.sub.50) of from 80 to 800 nm, and thermoplastic molding compounds containing these graft polymers.Type: GrantFiled: January 2, 1990Date of Patent: October 12, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Christian Lindner, Gerd Fengler, Hans-Eberhard Braese, Jurgen Kirsch
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Patent number: 5250617Abstract: Polymer blends of(a) graft polymers of vinyl monomers on an alkyl acrylate rubber(b) a partly crosslinked acrylate-based copolymer rubber(c) a resin-like copolymer(d) an ethylene/vinyl acetate copolymer,a process for their production and their use as thermoplastic molding compounds.Type: GrantFiled: July 27, 1992Date of Patent: October 5, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Hans Wunderlich, Hans-Eberhard Braese, Christian Lindner
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Patent number: 5237001Abstract: The present invention is directed to a thermoplastic composition which is a blend of A) a thermoplastic polyurethane and B) an at least partly crosslinked alkyl acrylate copolymer of a C.sub.1-6 alkyl acrylate and a monomer selected from the group consisting of acrylonitrile, styrene, vinyl acetate, C.sub.1-6 alkyl methacrylates and mixtures thereof. The preferred compositions also contain copolymer selected from the group consisting ofC1) a thermoplastic graft product of a rubber component having a glass transition temperature below 0.degree. C., which serves as the graft base, and at least one graft monomer selected from the group consisting of styrene, .alpha.-methyl styrene, acrylonitrile an C.sub.1-6 alkyl methacrylate,C2) a rubber-free resin copolymer of styrene or .alpha.-methyl styrene with acrylonitrile,C3) mixtures thereof.Type: GrantFiled: June 11, 1991Date of Patent: August 17, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Ernst Orthmann, Christian Lindner, Hans-Eberhard Braese
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Patent number: 5229455Abstract: A film-forming composition comprises from 0.1-8% by weight of an oligomeric polyglycidyl ether or ester and a polymer mixture ofa) a graft polymer prepared by polymerizing a monomer mixture of acrylonitrile, and alpha-methylstyrene and/or an alkylmethacrylate; or methylmethacrylate optionally with other monomers, onto cross-linked alkylacrylate rubber particles;b) a partially cross-linked rubber-like copolymer derived from an alkylacrylate and other monomers;c) an uncross-linked polymer of styrenes, (meth)acrylonitrile, (meth)acrylic acid esters and/or vinyl carboxylic acids; and optionallyd) a graft polymer obtained from the polymerization of a mixture of acrylonitrile, and styrenes and/or an alkylmethacrylate; or methylmethacrylate optionally with other monomers, onto cross-linked alkylacrylate rubber particles.Type: GrantFiled: September 6, 1991Date of Patent: July 20, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Hans-Eberhard Braese, Otto Billinger, Rolf Kubens
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Patent number: 5219643Abstract: The present invention relates to multilayered films consisting of a thermoplastic film having a long term temperature resistance above 130.degree. C. and a tough elastic film of a mixture of a polyurethane, an acrylate rubber polymer and optionally a thermoplast resin selected from vinyl polymers.The invention also relates to the use of the multilayered films for the production of crash pad films.Type: GrantFiled: September 3, 1991Date of Patent: June 15, 1993Assignee: Bayer AktiengesellschaftInventors: Fritz Schmidt, Hans-Eberhard Braese, Karl-Erwin Piejko, Christian Lindner
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Patent number: 5196466Abstract: Polymer mixtures of acrylate graft rubbers, certain special acrylate copolymers and optionally resinous vinyl polymers, containing special oxetanyl group-containing phosphites, have improved thermostability and are suitable inter alia for the fabrication of films.Type: GrantFiled: September 6, 1991Date of Patent: March 23, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Hans-Eberhard Braese, Holger Lutjens
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Patent number: 5194497Abstract: Polymer alloys containing resin-like polymers of monomers corresponding to formula (I) ##STR1## in which R.sup.1 =H, CH.sub.3,R.sup.2 =C.sub.1-8 alkylene,R.sup.3 =C.sub.1-4 alkyl,and, optionally, other typical vinyl monomers and thermoplastic polymers or graft polymers.Type: GrantFiled: March 15, 1991Date of Patent: March 16, 1993Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Gerd Fengler, Holger Lutjens, Hans-Eberhard Braese, Christian Lindner, Jurgen Kirsch
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Patent number: 5187231Abstract: Plastics suitable for use as thermoplastic moulding compositions obtained fromA) a thermoplastic vinyl polymer andB) a mixture ofB1) a copolymer of 35 to 49% by weight of maleic acid anhydride and 65 to 51% by weight of styrene andB2) a copolymer of styrene, .alpha.-methylstyrene or mixtures thereof on the one hand and acrylonitrile on the other having an acrylonitrile content of 35 to 60% by weight [based on B2)]and a process for their preparation.Type: GrantFiled: August 30, 1991Date of Patent: February 16, 1993Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Herbert Eichenauer, Holger Lutjens, Hans-Eberhard Braese
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Patent number: 5147700Abstract: The invention relates to thermoplastic molding compositions of PVC and (ter)polymers which can optionally be grafted on to a resin and are suitable for the production of optical discs by virtue of their extremely low double refraction.Type: GrantFiled: May 17, 1990Date of Patent: September 15, 1992Assignee: Bayer AktiengesellschaftInventors: Horst Bruggemann, Dieter Freitag, Lothar Meier, Christian Lindner, Hans-Eberhard Braese
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Patent number: 5143973Abstract: The invention relates to thermoplastic molding compositions of PVC and (ter)polymers which can optionally be grafted on to a resin and are suitable for the production of optical discs by virtue of their extremely low double refraction.Type: GrantFiled: April 23, 1990Date of Patent: September 1, 1992Assignee: Bayer AktiengesellschaftInventors: Horst Bruggemann, Dieter Freitag, Lothar Meier, Christian Lindner, Hans-Eberhard Braese
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Patent number: 5112910Abstract: Process for the preparation of mixtures of thermoplastic polymers in powder form from aqueous emulsions ofa) particulate, partly crosslinked rubber-like copolymers of a C.sub.2 -C.sub.8 -alkyl acrylate and/or butadiene with (based on the copolymer) up to 40 wt. % acrylonitrile, styrene or C.sub.1 -C.sub.4 -alkyl methacrylate,b) a thermoplastic resin, and if appropriatec) a rubber-rich graft polymer of styrene, .alpha.-methylstyrene, acrylonitrile, methyl methacrylate and/or alkyl acrylate on a diene or alkyl acrylate rubber having a rubber content of 50 to 95 wt. %,wherein aqueous emulsions of a) and b) and if appropriate c) having polymer contents of 15 to 50 wt. % are mixed with a coagulate solution simultaneously, but in separate streams, continuously or semi-continuously at 20.degree. to 100.degree. C., the polymers a) and b) and if appropriate c) being coagulated, the streams are combined and the polymer mixture is then separated off.Type: GrantFiled: August 12, 1991Date of Patent: May 12, 1992Assignee: Bayer AGInventors: Karl-Erwin Piejko, Christian Lindner, Ralph Ostarek, Hans-Eberhard Braese, Karl-Heinz Ott
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Patent number: 5104935Abstract: Polymer mixtures ofa. 10 to 60 parts by weight of a graft polymer,b. 10 to 50 parts by weight of a partially cross-linked, rubber like copolymer of from 5 to 40% by weight of acrylonitrile, styrene, alkyl methacrylate or mixtures thereof and from 95 to 60% by weight of alkyl acrylate having a gel content of from 20 to 99% by weight,c. 5 to 40 parts by weight of an uncross-linked polymer of styrenes, .alpha.-methyl styrenes, acrylonitrile, methacrylonitrile, esters of acrylic acid or methacrylic acid, vinyl C.sub.1 to C.sub.4 carboxylic acids or mixtures of these monomers having Staudinger Indices (.eta.) (determined in dimethyl formamide at 23.degree. C.) of from 0.3 to 1.5 dl/g andd. 1 to 45 parts by weight of a polymer of a cyclic aliphatic ester or of an aliphatic cyclic ester and an aliphatic cyclic carbonate.Type: GrantFiled: December 6, 1989Date of Patent: April 14, 1992Assignee: Bayer AktiengesellschaftInventors: Edgar Leitz, Karl-Erwin Piejko, Christian Lindner, Karl-Heinz Ott, Hans-Eberhard Braese
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Patent number: 5096966Abstract: Polymer mixtures of a special graft polymer based on acrylate rubber, a special rubbery acrylate copolymer, resin-type vinyl polymers and polyesters containing carbonate groups and their use in manufacturing flexible (leather-type) sheets.Type: GrantFiled: May 25, 1990Date of Patent: March 17, 1992Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Kurt P. Meurer, Hans-Eberhard Braese
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Patent number: 5047473Abstract: This invention relates to flexible, soft polymer mixtures which are suitable for the production of sheets with a leather-like appearance and can be worked up by calendering and deep drawing and to a process for their preparation.Type: GrantFiled: December 12, 1988Date of Patent: September 10, 1991Assignee: Bayer AktiengesellschaftInventors: Karl-Erwin Piejko, Christian Lindner, Hans-Eberhard Braese, Rolf Kubens, Karl-Heinz Ott
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Patent number: 4959418Abstract: Polymer powders and thermoplastic moulding materials with improved properties are obtained if graft polymers and/or resins in particle form are used and small amounts of rubber-like polymers are polymerized or graft-polymerized onto their particle surfaces.Type: GrantFiled: August 18, 1986Date of Patent: September 25, 1990Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Karl-Heinz Ott, Dieter Wittmann, Hans-Eberhard Braese
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Patent number: 4940747Abstract: Thermoplastic moulding materials, of vinyl chloride polymers, which contain a polymer, prepared in the presence of mercaptans, from styrene, .alpha.-methylstyrene, vinyltoluene, acrylonitrile, methyl methacrylate or mixtures thereof and which possess improved processing properties.Type: GrantFiled: November 17, 1986Date of Patent: July 10, 1990Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Christian Lindner, Karl-Heinz Ott, Hans-Eberhard Braese
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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: 4902744Abstract: A polymer mixture of(a) 45 to 50 parts by weight of a graft product of a mixture of 25 to 40 parts by weight acrylonitrile and 75 to 60 parts by weight styrene, .alpha.-methylstyrene, alkylmethacrylate or mixtures thereof on a particulate, highly crosslinked diene rubber having a rubber content of 20 to 40% by weight,(b) 45 to 10 parts by weight of a graft product of a mixture of 20 to 35 parts by weight acrylonitrile and 80 to 65 parts by weight styrene or .alpha.-methylstyrene on a particulate, highly crosslinked diene rubber having a rubber content of 50 to 75% by weight, the graft yield being greater than 60% by weight,(c) 10 to 50 parts by weight of a particulate, partially crosslinked, rubber-like copolymer of a C.sub.2 -C.sub.8 alkylacrylate and/or butadiene containing up to 40% by weight (based on copolymer) acrylonitrile which has an average particle diameter (d.sub.50) of from 0.1 to 0.3 .mu.Type: GrantFiled: November 25, 1988Date of Patent: February 20, 1990Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Hans-Eberhard Braese, Karl-Erwin Piejko