Patents by Inventor Achim Stammer

Achim Stammer 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).

  • Patent number: 11186684
    Abstract: The present invention relates to a process for continuously producing a polyamide powder (PP) comprising at least one semicrystalline polyamide (P). The present invention further relates to the polyamide powder (PP) thus obtainable and to the use of the polyamide powder (PP) as sinter powder (SP), and also to a process for producing a shaped body by exposing a layer of a polyamide powder (PP).
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: November 30, 2021
    Assignee: BASF SE
    Inventors: Achim Stammer, Simon Gramlich, Andreas Bauder
  • Publication number: 20210269596
    Abstract: The present invention relates to a process for continuously producing a polyamide powder (PP) comprising at least one semicrystalline polyamide (P). The present invention further relates to the polyamide powder (PP) thus obtainable and to the use of the polyamide powder (PP) as sinter powder (SP), and also to a process for producing a shaped body by exposing a layer of a polyamide powder (PP).
    Type: Application
    Filed: July 10, 2019
    Publication date: September 2, 2021
    Inventors: Achim STAMMER, Simon GRAMLICH, Andreas BAUDER
  • Patent number: 11097202
    Abstract: The present invention relates to a process for energy recovery in a process for the preparation of 1,3,5-trioxane.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: August 24, 2021
    Assignees: BASF SE, Kolon Plastics Inc.
    Inventors: Achim Stammer, Thomas Heitz, Marvin Kramp, JongMoon Kim, In-Gi Cho, Jin-Sang Choi, Sang-Yup Lee
  • Publication number: 20210206919
    Abstract: Process for producing polyamide powders by precipitation The present invention relates to a process for producing polyamide powders and to the polyamide powders obtainable by this process. The present invention additionally relates to the use of the polyamide powder as sintering powder in selective laser sintering.
    Type: Application
    Filed: February 16, 2017
    Publication date: July 8, 2021
    Inventors: Angela ULZHÖFER, Simon GRAMLICH, Rainer OSTERMANN, Achim STAMMER, Dirk SIMON, Ning ZHU
  • Patent number: 10889689
    Abstract: The present invention relates to a process for preparing a polyaryl ether by reacting components (a1) and (a2) in the presence of a carbonate compound (C) to obtain a salt-containing polymer (SP) comprising the polyaryl ether and a salt (S). After the reaction, the salt (S) is extracted from the salt-containing polymer (SP) to obtain a desalinated polymer (DP) comprising the polyaryl ether.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: January 12, 2021
    Assignee: BASF SE
    Inventors: Simon Gramlich, Achim Stammer, Angela Ulzhoefer, Frank Niedermaier, Michel Gassmann
  • Publication number: 20200407508
    Abstract: A method for producing films, fibers, and moldings of a polybenzazole polymer (P) by reacting at temperatures of 0 to 120° C. a mixture including (a) aromatic dicarboxylic compound(s) (I): wherein Ar1 is optionally substituted phenylene, naphthalenediyl, anthracenediyl, biphenyldiyl, diphenylmethanediyl, diphenyl ether diyl, diphenyl thio ether diyl, diphenyl sulfone diyl, benzophenonediyl, pyridinediyl, pyrimidinediyl, furandiyl, or thiophenediyl, substituents being —F, —Cl, —Br, —OR1, and —C1-C10-alkyl, R1 being —H or —C1-C10-alkyl; X1 and X2 are independently-OR2, —F, —Cl, or —Br, R2 being —H, —C1-C10-alkyl, —C1-C10-alkenyl or a repeating unit (a): wherein m is a natural number from 1 to 50, and R3 is —H, C1-C10-alkyl, or C1-C10-alkenyl; (b) aromatic diamino compound(s) of formula (IIa), (IIb), (IIc) and/or (IId); (c) at least one ionic liquid (IL), to obtain a product, processing the product at temperatures 0 to 100° C. and heating of the articles obtained at temperatures of 250 to 500° C.
    Type: Application
    Filed: March 1, 2019
    Publication date: December 31, 2020
    Applicant: BASF SE
    Inventors: Marcel BRILL, Ines DEBEAUVAIS DE VASCONCELOS, Maik NOWAK, Olivier FLEISCHEL, Martin MERGER, Achim STAMMER, Joachim RUCH, Frank HERMANUTZ, Ronald BEYER, Michael R. BUCHMEISER
  • Patent number: 10843384
    Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a loop conduit (29) which comprises a static mixer (36), wherein the reagents (11, 12) are pressed in loops through the loop conduit (29) and passing the static mixer (36), whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the static mixer (36). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: November 24, 2020
    Assignee: INEOS STYROLUTION GROUP GMBH
    Inventors: SangJun Ahn, Wolfgang Fischer, Norbert Niessner, Brian J. Banaszak, Roland Walker, Ula El-Jaby, Achim Stammer, Klaus-Dieter Hungenberg, Bernd Hisgen
  • Publication number: 20200261823
    Abstract: The present invention relates to a process for energy recovery in a process for the preparation of 1,3,5-trioxane.
    Type: Application
    Filed: December 7, 2016
    Publication date: August 20, 2020
    Inventors: Achim STAMMER, Thomas HEITZ, Marvin KRAMP, Jong-Moon KIM, In-Gi CHO, Jin-Sang CHOI, Sang-Yup LEE
  • Patent number: 10676569
    Abstract: The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 9, 2020
    Assignee: BASF SE
    Inventors: Joachim Clauss, Stefan Schwiegk, Gad Kory, Christian Schmidt, Axel Wilms, Florian Richter, Ning Zhu, Silke Biedasek, Isa Alexandra Queiroz Da Fonseca, Heinrich Sack, Arnold Schneller, Achim Stammer, Volker Rauschenberger
  • Publication number: 20200048395
    Abstract: A process for making an oxymethylene polymer comprising polymerizing at least one compound capable of forming —CH2O— repeat units (monomer) in the presence of at least one ester of the general formula I (ester): R1—CO—O—R2 (I) wherein R1 can be hydrogen, wherein R1 and R2 are independently of each other linear or branched C1 to C10 alkyl C5 to C7 cycloalkyl —[R3-0-]nR4 wherein R3 is a linear or branched C2 to C5 alkylen and R4 is a linear of branched C1 to C5 alkyl and n is an integer of from 1 to 5. and in the presence of at least one Lewis acid.
    Type: Application
    Filed: January 9, 2018
    Publication date: February 13, 2020
    Inventors: Thomas Heitz, Minlu ZHANG, Achim STAMMER, JongMoon KIM, In-Gi CHO, Jin-Sang CHOI
  • Patent number: 10525439
    Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a gear pump (10) which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit (29) is provided, and wherein the reagents (11, 12) are pressed in a loop through the loop conduit (29) and passing the gear wheels, whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the gear pump (10). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: January 7, 2020
    Assignee: INEOS STYROLUTION GROUP GMBH
    Inventors: SangJun Ahn, Wolfgang Fischer, Norbert Niessner, Brian J. Banaszak, Roland Walker, Ula El-Jaby, Achim Stammer, Klaus-Dieter Hungenberg, Bernd Hisgen
  • Publication number: 20190085134
    Abstract: The present invention relates to a process for preparing a polyaryl ether by reacting components (a1) and (a2) in the presence of a carbonate compound (C) to obtain a salt-containing polymer (SP) comprising the polyaryl ether and a salt (S). After the reaction, the salt (S) is extracted from the salt-containing polymer (SP) to obtain a desalinated polymer (DP) comprising the polyaryl ether.
    Type: Application
    Filed: March 14, 2017
    Publication date: March 21, 2019
    Inventors: Simon GRAMLICH, Achim STAMMER, Angela ULZHOEFER, Frank NIEDERMAIER, Michel GASSMANN
  • Publication number: 20180178411
    Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a loop conduit (29) which comprises a static mixer (36), wherein the reagents (11, 12) are pressed in loops through the loop conduit (29) and passing the static mixer (36), whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the static mixer (36). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.
    Type: Application
    Filed: June 9, 2016
    Publication date: June 28, 2018
    Inventors: SangJun AHN, Wolfgang FISCHER, Norbert NIESSNER, Brian J. BANASZAK, Roland WALKER, Ula EL-JABY, Achim STAMMER, Klaus-Dieter HUNGENBERG, Bernd HISGEN
  • Patent number: 9994678
    Abstract: The present invention relates to a process for the preparation of an aliphatic or partially aromatic polyamide, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and increased pressure, the reaction mixture is optionally subjected to a first decompression to reduce the water content, the (optionally decompressed) reaction mixture is heated within a short time to a temperature above the melting temperature of the polyamides and the heated reaction mixture is subjected to a (further) decompression to reduce the water content and to an after-polymerization.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: June 12, 2018
    Assignee: BASF SE
    Inventors: Christian Schmidt, Joachim Clauss, Axel Wilms, Volker Rauschenberger, Gad Kory, Stefan Schwiegk, Arnold Schneller, Achim Stammer, Frank Niedermaier, Bernd Hackel
  • Patent number: 9975994
    Abstract: A method for desalinating a salt-containing polymer (SP) comprising a polyaryl ether having a softening temperature TS and a salt (S), comprising the steps of a) providing the salt-containing polymer (SP) at a first temperature T1 above the softening temperature TS of the polyaryl ether, b) contacting the salt-containing polymer (SP) provided in step a) with an extractant (E) to obtain a desalinated polymer (DP) comprising the polyaryl ether, and a salt-containing extractant (SE) comprising the extractant (E) and the salt (S).
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: May 22, 2018
    Assignee: BASF SE
    Inventors: Simon Gramlich, Achim Stammer, Angela Ulzhöfer, Frank Niedermaier
  • Patent number: 9957355
    Abstract: The invention relates to a device for synthesis of a polymer under separation of a gaseous substance. Said device comprises a reaction chamber (1), which has a top section (11), a middle section (12) and a bottom section (13), an inlet opening (2) which is arranged in the middle section (12), a first outlet opening (3) which is arranged in the bottom section (13), a second outlet opening (4) which is arranged in the top section (11), a first return opening (51), which is arranged in the bottom section (13), a second outlet opening (52), which is arranged under the top section (11), a distribution device (6), which is arranged between the top section (11) and the middle section (12), and a removal device (7) which is arranged to be movable along the top section (11). The invention further relates to a method for synthesis of a polymer which can be carried out in said device.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: May 1, 2018
    Assignee: BASF SE
    Inventors: Ning Zhu, Achim Stammer, Joachim Clauss, Gad Kory
  • Publication number: 20180085732
    Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a gear pump (10) which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit (29) is provided, and wherein the reagents (11, 12) are pressed in a loop through the loop conduit (29) and passing the gear wheels, whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the gear pump (10). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.
    Type: Application
    Filed: April 11, 2016
    Publication date: March 29, 2018
    Inventors: SangJun AHN, Wolfgang FISCHER, Norbert NIESSNER, Brian J. BANASZAK, Roland WALKER, Ula EL-JABY, Achim STAMMER, Klaus-Dieter HUNGENBERG, Bernd HISGEN
  • Patent number: 9914805
    Abstract: The invention relates to a device for synthesizing a polymer accompanied by separating a gaseous substance. Said device comprises: a reactor chamber (1) having a substantially circular cylinder-shaped upper section (11), which is delimited by two circular surfaces (111, 112) and a circumferential surface (113) and has a longitudinal cylinder axis, and a lower section (12), the upper section (11) and the lower section (12) being connected to one another via the first circular surface (111); an inlet opening (2); a first outlet opening (3), which is arranged in a wall of the lower section (12); a second outlet opening (4), which is arranged in the second circular surface (112) or in the circumferential surface (113) between the inlet opening (2) and the second circular surface (112); and a removal device (51), which is arranged so as to be movable along the longitudinal cylinder axis at least between the second circular surface (112) and the inlet opening (2), and contacts the circumferential surface (113).
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 13, 2018
    Assignee: BASF SE
    Inventors: Ning Zhu, Achim Stammer, Joachim Clauss, Uwe Witt, Gad Kory, Silke Biedasek
  • Publication number: 20180009950
    Abstract: A method for desalinating a salt-containing polymer is provided. The salt-containing polymer contains a polyaryl ether and a salt. The method includes the steps of mechanically increasing the surface area of the salt-containing polymer to obtain a salt-containing polymer of increased surface area, and contacting the salt-containing polymer of increased surface area with an extractant to obtain a desalinated polymer containing the polyaryl ether, and a salt-containing extractant containing the extractant and the salt.
    Type: Application
    Filed: January 22, 2016
    Publication date: January 11, 2018
    Applicant: BASF SE
    Inventors: Simon GRAMLICH, Achim STAMMER
  • Publication number: 20180009944
    Abstract: A method for desalinating a salt-containing polymer (SP) comprising a polyaryl ether having a softening temperature TS and a salt (S), comprising the steps of a) providing the salt-containing polymer (SP) at a first temperature T1 above the softening temperature TS of the polyaryl ether, b) contacting the salt-containing polymer (SP) provided in step a) with an extractant (E) to obtain a desalinated polymer (DP) comprising the polyaryl ether, and a salt-containing extractant (SE) comprising the extractant (E) and the salt (S).
    Type: Application
    Filed: January 22, 2016
    Publication date: January 11, 2018
    Inventors: SIMON GRAMLICH, Achim STAMMER, Angela ULZHÕFER