-
公开(公告)号：PT98610A
公开(公告)日：1992-06-30
申请号：PT9861091
申请日：1991-08-08
Applicant: HOECHST AG
Inventor： FLEISCHER DIETRICH , SCHLAF HELMUT
Abstract: A thermoplastic moulding composition comprising A) from 50 to 95% by weight of polyoxymethylene, B) from 5 to 50% by weight of a rubber-elastic graft copolymer, and optionally conventional additives, where component B) comprises a rubber-elastic core based on at least one polydiene which is at least partially crosslinked, and at least one rigid graft shell, and has a bimodal particle size distribution. Monomers for the formation of the graft shell are styrene, (meth)acrylonitrile and/or methyl methacrylate. The mouldings produced from the moulding compositions have good ductile fracture behaviour, even at low temperatures.
-
公开(公告)号：DK607983A
公开(公告)日：1984-07-01
申请号：DK607983
申请日：1983-12-30
Applicant: HOECHST AG
Inventor： FLEISCHER DIETRICH , WEBER ECKHARD , BRANDRUP JOHANNES
-
公开(公告)号：PT98610B
公开(公告)日：1999-01-29
申请号：PT9861091
申请日：1991-08-08
Applicant: HOECHST AG
Inventor： FLEISCHER DIETRICH , SCHLAF HELMUT
Abstract: A thermoplastic moulding composition comprising A) from 50 to 95% by weight of polyoxymethylene, B) from 5 to 50% by weight of a rubber-elastic graft copolymer, and optionally conventional additives, where component B) comprises a rubber-elastic core based on at least one polydiene which is at least partially crosslinked, and at least one rigid graft shell, and has a bimodal particle size distribution. Monomers for the formation of the graft shell are styrene, (meth)acrylonitrile and/or methyl methacrylate. The mouldings produced from the moulding compositions have good ductile fracture behaviour, even at low temperatures.
-
公开(公告)号：DE69313324T2
公开(公告)日：1998-02-12
申请号：DE69313324
申请日：1993-03-05
Applicant: POLYPLASTICS CO , HOECHST AG
Inventor： YAMAMOTO KAORU , MAEDA NAGAYOSHI , KAMIYA MAKOTO , MURAO TOSHIRO , REUSCHEL GERHARD , FLEISCHER DIETRICH
Abstract: A process for producing a polyoxymethylene copolymer having improved thermal stability and/or a high degree of polymerisation comprises copolymerising trioxane as a main monomer with a cyclic ether or a cyclic formal as a comonomer in the presence of 1 x 10 % to 1 x 10 % by mole (based on the total amount of the monomers) of a catalyst comprising boron trifluoride or a coordination compound thereof, wherein unwanted decomposition and side reactions are controlled by keeping to below 1 x 10 % by mole (based on the total amount of the monomers) the total content of impurities such as would give short product chains and/or unstable terminal groups in the copolymer, and cooling the obtained product to a temperature of 45 DEG C or below within 30 seconds after the completion of the copolymerisation to deactivate the catalyst.
-
公开(公告)号：ES2098136T3
公开(公告)日：1997-04-16
申请号：ES94913593
申请日：1994-04-13
Applicant: HOECHST AG
Inventor： STRUTZ HEINZ , FLEISCHER DIETRICH , KULPE JURGEN , SCHLEICHER ANDREAS DR
Abstract: A filter material based on a polyarylene thioether having repeating units of the formula -[(Ar1)n-X)]m-[(Ar2)i-Y)]j-[(Ar3)k-Z)]l-[(Ar4)o-W)]p-(I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.
-
Patent Agency Ranking
公开(公告)号：IE70595B1
公开(公告)日：1996-12-11
申请号：IE281191
申请日：1991-08-08
Applicant: HOECHST AG
Inventor： FLEISCHER DIETRICH , SCHLAF HELMUT
Abstract: A thermoplastic moulding composition comprising A) from 50 to 95% by weight of polyoxymethylene, B) from 5 to 50% by weight of a rubber-elastic graft copolymer, and optionally conventional additives, where component B) comprises a rubber-elastic core based on at least one polydiene which is at least partially crosslinked, and at least one rigid graft shell, and has a bimodal particle size distribution. Monomers for the formation of the graft shell are styrene, (meth)acrylonitrile and/or methyl methacrylate. The mouldings produced from the moulding compositions have good ductile fracture behaviour, even at low temperatures.
-
公开(公告)号：CA2157456A1
公开(公告)日：1996-03-06
申请号：CA2157456
申请日：1995-09-01
Applicant: HOECHST AG
Inventor： HOFFMOCKEL MICHAEL , MUECK KARL-FRIEDRICH , FLEISCHER DIETRICH , SEXTRO GUENTER
Abstract: In the process for the preparation, with simultaneous end group stabilization, of polyacetal copolymers in a homogeneous phase and working up thereof, cyclic formaldehyde oligomers are copolymerized with cyclic acetals in the presence of an initiator in a polymerization reactor and immediately thereafter the initiator is deactivated by addition of basic substances, the unstable chain ends being degraded down to 0.01% to 1% in the presence of residual monomer, the product losing the majority of the residual monomer at the reactor outlet by letting down into a pelletizing device and the residual monomer which remains and the impurities dissolved in the product being removed by extraction with solvents and the product being pelletized, after drying and stabilization.
-
公开(公告)号：NO960606L
公开(公告)日：1996-02-15
申请号：NO960606
申请日：1996-02-15
Applicant: HOECHST AG
Inventor： SCHLEICHER ANDREAS , FLEISCHER DIETRICH , KULPE JURGEN , FRANK GEORG
Abstract: PCT No. PCT/EP94/02688 Sec. 371 Date Jul. 15, 1996 Sec. 102(e) Date Jul. 15, 1996 PCT Filed Aug. 11, 1994 PCT Pub. No. WO95/05894 PCT Pub. Date Mar. 2, 1995A method for removing oxides of nitrogen from gases and liquids by contacting a NOx containing gas or liquid with a polyarylene thioether filter material and a solid oxidizing agent having an electron potential greater than 0.96 V, wherein the solid oxidizing agent oxidizes NO into NO2 which is removed by the polyarylene thioether filter material.
-
公开(公告)号：NO954306A
公开(公告)日：1995-10-27
申请号：NO954306
申请日：1995-10-27
Applicant: HOECHST AG
Inventor： STRUTZ HEINZ , FLEISCHER DIETRICH , KUPLE JURGEN , SCHLEICHER ANDREAS
CPC classification number: B01J20/26 , B01D19/0031 , B01D53/66 , C08G75/0204 , Y02A50/2347
Abstract: A filter material based on a polyarylene thioether having repeating units of the formula -[(Ar1)n-X)]m-[(Ar2)i-Y)]j-[(Ar3)k-Z)]l-[(Ar4)o-W)]p-(I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.
-
公开(公告)号：CA2170259A1
公开(公告)日：1995-03-02
申请号：CA2170259
申请日：1994-08-11
Applicant: HOECHST AG
Inventor： SCHLEICHER ANDREAS , FLEISCHER DIETRICH , KULPE JUERGEN , FRANK GEORG
Abstract: Filter material and method of removing oxides of nitrogen from gases and liquids A filter material based on a polyarylenethioether with recurring units of the formula -¢(Ar1)n-X)!m-¢(Ar2)i-Y)!j-¢(Ar3)k-Z)!1-¢(Ar4)o-W)!p- (I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z independently of one another are identical or different, the indices n, m, i, j, k, l, o and p independently of one another are zero or integers 1, 2, 3 or 4, the sum of which is at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems of 6 to 18 carbon atoms and W, X, Y and Z are divalent linking groups selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-or alkylene or alkylidene groups of 1 to 6 carbon atoms, for removing oxides of nitrogen (NOx) from gases or liquids. Also claimed is a method of removing oxides of nitrogen, in which an NOx-containing gas or a liquid is brought into contact with the abovementioned filter material and a chemical reaction occurs. Nitrogen monoxide can likewise be removed by adding to the filter material oxidative inorganic or organic compounds having an electron potential of greater than or equal to 0.96 V.
-
-
-
-
-
-
-
-
-
Search Results
67
records
(took 0.052 seconds)
