公开(公告)号：CA2206241A1

公开(公告)日：1996-06-06

申请号：CA2206241

申请日：1995-11-24

Applicant: HOECHST AG

Inventor： SCHARDT RICHARD ,  ZIMMERSCHIED KLAUS ,  HESSEL FRIEDRICH ,  RINNO HELMUT

IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18

Abstract: Described is a method of producing emulsion polymers on an industrial scale from at least partially hydrophobic monomers in an agitator reactor vessel with a useful volume of 2 to 80 m3, using a metering technique with a monomeraddition rate of 15 to 60 % by wt. per hour of the total amount of monomer to be added, by polymerizing and distilling a water/monomer mixture under reduced pressure and feeding the condensed water/monomer mixture back to the reactor vessel.

公开(公告)号：BR9404950A

公开(公告)日：1995-08-08

申请号：BR9404950

申请日：1994-12-12

Applicant: HOECHST AG

Inventor： RINNO HELMUT ,  HESSEL FRIEDRICH ,  ALBERTI KLAUS

IPC: A61L2/12 ,  B29B13/08 ,  C08J3/28

Abstract: A method of reducing the microorganism count in microbially contaminated aqueous multiphase systems containing synthetic resins, such as polymer dispersions and preparations containing polymer binders, by dielectric warming, preferably directly before packaging of the multiphase systems.

公开(公告)号：ZA9409896B

公开(公告)日：1996-06-12

申请号：ZA9409896

申请日：1994-12-12

Applicant: HOECHST AG

Inventor： RINNO HELMUT ,  HESSEL FRIEDRICH ,  ALBERTI KLAUS

IPC: A61L2/12 ,  B29B13/08 ,  C08J3/28 ,  B29B ,  C08J ,  C08L ,  C09D

CPC classification number: B29B13/08 ,  A61L2/12

公开(公告)号：CA2115408A1

公开(公告)日：1994-08-12

申请号：CA2115408

申请日：1994-02-10

Applicant: HOECHST AG

Inventor： RIEDEL GUENTER ,  KRUENER HARTMUT ,  BOBERSKI CORNELIA ,  HESSEL FRIEDRICH ,  BOECKER WOLFGANG ,  HEINRICH JUERGEN ,  STEINER MATTHIAS ,  DOETSCH PETRA ,  ROSENFELDER OTTMAR

IPC: C04B35/584 ,  C04B35/58 ,  C04B35/593 ,  C04B35/64 ,  C04B35/645 ,  F01L3/02 ,  C04B35/56

Abstract: Process for producing densely sintered ceramic components made of silicon nitride and having high mechanical strength In the process for producing a homogeneous and finely crystalline silicon nitride ceramic, ceramic powder is milled, mixed with shaping aids, the mixture is shaped into parts and the shaped parts are subsequently sintered in a nitrogen atmosphere. According to the invention, sintering is carried out in a multistage process at temperatures Tmax in the range from 1700 to 1900.degree.C using gas pressures in the range from 0.3 to 50 MPa. In a first temperature stage, a temperature from 0.9 to 0.96 Tmax is maintained over a time period from 10 to 50 minutes at an N2 pressure from 0.2 to 1.2 MPa, while in a second temperature stage a temperature from 0.97 to 0.985 Tmax is maintained over a time period from 20 to 80 minutes at an N2 pressure from 3 to 6 MPa. Then the temperature is increased to Tmax and the pressure is increased to from 7 to 50 MPa.

公开(公告)号：AU4255796A

公开(公告)日：1996-06-19

申请号：AU4255796

申请日：1995-11-24

Applicant: HOECHST AG

Inventor： HESSEL FRIEDRICH ,  RINNO HELMUT ,  SCHARDT RICHARD ,  ZIMMERSCHIED KLAUS

IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18

Abstract: Described is a method of producing emulsion polymers on an industrial scale from at least partially hydrophobic monomers in an agitator reactor vessel with a useful volume of 2 to 80 m , using a metering technique with a monomer-addition rate of 15 to 60 % by wt. per hour of the total amount of monomer to be added, by polymerizing and distilling a water/monomer mixture under reduced pressure and feeding the condensed water/monomer mixture back to the reactor vessel.

公开(公告)号：CA2123966A1

公开(公告)日：1994-11-21

申请号：CA2123966

申请日：1994-05-19

Applicant: HOECHST AG

Inventor： HESSEL FRIEDRICH ,  SEITZ KATHARINA ,  ROOSEN ANDREAS ,  WEGNER GERHARD ,  MEYER WOLFGANG ,  SIGMUND WOLFGANG

IPC: C04B35/00 ,  C04B35/10 ,  C04B35/634 ,  C08K5/10

Abstract: Casting composition for producing green ceramic sheets containing polyvinyl alcohol/fatty acid ester as dispersant The invention relates to a casting composition comprising a ceramic powder, an organic solvent, binder, plasticizer and a dispersant, which composition is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol/fatty acid ester having a degree of conversion in the range from 50 to 100 %. The invention also relates to the use of such a casting composition for producing ceramic green sheets and a process for producing ceramic substrates using a green sheet thus produced.

公开(公告)号：AU679584B2

公开(公告)日：1997-07-03

申请号：AU8035694

申请日：1994-12-09

Applicant: HOECHST AG

Inventor： RINNO HELMUT ,  HESSEL FRIEDRICH ,  ALBERTI KLAUS

IPC: A61L2/12 ,  B29B13/08 ,  C08J3/28 ,  A61L2/08

Abstract: A method of reducing the microorganism count in microbially contaminated aqueous multiphase systems containing synthetic resins, such as polymer dispersions and preparations containing polymer binders, by dielectric warming, preferably directly before packaging of the multiphase systems.

公开(公告)号：ZA9510119B

公开(公告)日：1997-05-29

申请号：ZA9510119

申请日：1995-11-29

Applicant: HOECHST AG

Inventor： HESSEL FRIEDRICH ,  RINNO HELMUT ,  SCHARDT RICHARD ,  ZIMMERSCHIED KLAUS

IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18 ,  C08F

Abstract: Described is a method of producing emulsion polymers on an industrial scale from at least partially hydrophobic monomers in an agitator reactor vessel with a useful volume of 2 to 80 m , using a metering technique with a monomer-addition rate of 15 to 60 % by wt. per hour of the total amount of monomer to be added, by polymerizing and distilling a water/monomer mixture under reduced pressure and feeding the condensed water/monomer mixture back to the reactor vessel.

公开(公告)号：AU692980B2

公开(公告)日：1998-06-18

申请号：AU4255796

申请日：1995-11-24

Applicant: HOECHST AG

Inventor： HESSEL FRIEDRICH ,  RINNO HELMUT ,  SCHARDT RICHARD ,  ZIMMERSCHIED KLAUS

IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18

Abstract: Described is a method of producing emulsion polymers on an industrial scale from at least partially hydrophobic monomers in an agitator reactor vessel with a useful volume of 2 to 80 m , using a metering technique with a monomer-addition rate of 15 to 60 % by wt. per hour of the total amount of monomer to be added, by polymerizing and distilling a water/monomer mixture under reduced pressure and feeding the condensed water/monomer mixture back to the reactor vessel.

公开(公告)号：MX9703992A

公开(公告)日：1997-09-30

申请号：MX9703992

申请日：1995-11-24

Applicant: HOECHST AG

Inventor： HESSEL FRIEDRICH ,  RINNO HELMUT ,  SCHARDT RICHARD ,  ZIMMERSCHIED KLAUS

IPC: C08F2/00 ,  C08F2/22 ,  C08F2/24 ,  C08F212/08 ,  C08F220/10 ,  C08F220/18 ,  C08F02/24

Abstract: En la escala industrial se pueden preparar polímeros para emulsiones compuestos de monomeros al menos parcialmente hidrofobicos en reactores de agitacion con 2 a 80 m3 de volumen util de acuerdo con el procedimiento de dosificacion con una velocidad de agregado de los monomeros de 15 a 60% en peso de la cantidad total de los monomeros a agregar por hora por medio de la polimerizacion y destilacion de una mezcla de agua/monomeros bajo presion reducida y retorno de la mezcla de agua/monomeros condensada por la refrigeracion.