Inventor

WULFF CLAUS

DE41 patents

Patents

41 patents

US5395857AMar 7, 1995

Optimized ion exchanger beds for the synthesis of bisphenol A

BAYER AG59 citations95

US5780690AJul 14, 1998

Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds

BAYER AG32 citations92

US5698600ADec 16, 1997

Process for producing thermoplastic granulated polymer material from polymer solutions

BAYER AG40 citations91

US5284981AFeb 8, 1994

Ion exchangers modified with mercapto amines

BAYER AG36 citations91

US5212206AMay 18, 1993

Ion exchange modified with mercapto amines

BAYER AG41 citations91

US5786445AJul 28, 1998

Process for drying polymeric powders and polymeric agglomerates

BAYER AG22 citations90

US5785823AJul 28, 1998

Process for the purification of bisphenol

BAYER AG32 citations89

US5696295ADec 9, 1997

Method for the preparation of ultra-pure bisphenol A and the use thereof

BAYER AG29 citations89

US4990595AFeb 5, 1991

Process for lowering the melt viscosity of aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters with super-critical gases

BAYER AG26 citations89

US4369293AJan 18, 1983

Catalyst for the preparation of bisphenols

BAYER AG37 citations89

US5455282AOct 3, 1995

Process of regenerating sulfonic acid cation exchange resins with a mercaptoethylamine or thiazolidine

BAYER AG19 citations78

US5652313AJul 29, 1997

Two-stage process for the manufacture of thermoplastic polycarbonate

BAYER AG13 citations74

US5317083AMay 31, 1994

Process for isolating polycarbonates from their solutions with tube having cross sectional contrictions

BAYER AG14 citations74

US4393009AJul 12, 1983

Process for the preparation of aromatic dicarboxylic acid dichlorides

BAYER AG7 citations74

US4098754AJul 4, 1978

Process for the preparation of high molecular thermoplastic polycarbonates of low flammability

BAYER AG15 citations74

US5412060AMay 2, 1995

Process for the production of polycarbonate of constant viscosity

BAYER AG13 citations73

US5703204ADec 30, 1997

Method for reprocessing aqueous extract solutions obtained in the production of PA 6 or copolyamide

BAYER AG16 citations72

US5300700AApr 5, 1994

Process for the production of high-purity bisphenol A

BAYER AG18 citations72

US4912263AMar 27, 1990

Ionic exchangers modified with thiazolines

BAYER AG17 citations72

US4614763ASep 30, 1986

Molding compounds of thermoplastic polyamide and graft rubber

BAYER AG10 citations71

US5959160ASep 28, 1999

Purification of p,p-bisphenolate solutions

BAYER AG8 citations69

US5260418ANov 9, 1993

Washing of polycarbonates with cascading train of centrifuges

BAYER AG6 citations63

US5115050AMay 19, 1992

Polyamide moulding compositions containing finely divided polyarylene sulphides

BAYER AG2 citations63

US4960864AOct 2, 1990

Process for recovering thermoplastic polymers from dispersion

BAYER AG2 citations63

US4356129AOct 26, 1982

Process for the preparation of neutral phosphorous acid aryl esters

BAYER AG5 citations63

US4346210AAug 24, 1982

Process for the preparation of polycarbonates catalyzed by cyclic aza compounds

BAYER AG5 citations63

US5981644ANov 9, 1999

Method of producing ABS moulding compositions

BAYER AG2 citations62

US4290977ASep 22, 1981

Process for the production of neutral phosphoric acid esters

BAYER AG2 citations62

US4267127AMay 12, 1981

Process for the production of phosphoric acid triesters

BAYER AG6 citations62

US5756860AMay 26, 1998

Crystalline adduct of bisphenol A and bisphenol TMC

BAYER AG5 citations61

US5456861AOct 10, 1995

Abietic acid derivatives and their use as emulsifiers

BAYER AG4 citations61

US5275758AJan 4, 1994

Production of ultrafine suspensions of bisphenol, sodium hydroxide and water

BAYER AG5 citations60

US5830977ANov 3, 1998

Process for the isolation of partially crystalline polycarbonate powder

BAYER AG0 citations51

US5726228AMar 10, 1998

Use of carbonates as demoulding agents for thermoplastic polycarbonates

BAYER AG1 citations51

USRE34626EMay 31, 1994

Isomerization of bisphenols

BAYER AG1 citations51

WULFF CLAUS

Patents

Optimized ion exchanger beds for the synthesis of bisphenol A

Bisphenol synthesis on modified ion-exchange resins using specially purified carbonyl compounds

Process for the production of bisphenols with the use of new cocatalysts

Polycarbonates containing aryl phosphines

Process for the production of bisphenols

Continuous production of polycarbonates

Isomerization of bisphenols

Process for the preparation of diarylcarbonates

Process for producing thermoplastic granulated polymer material from polymer solutions

Ion exchangers modified with mercapto amines

Ion exchange modified with mercapto amines

Process for drying polymeric powders and polymeric agglomerates

Process for the purification of bisphenol

Method for the preparation of ultra-pure bisphenol A and the use thereof

Process for lowering the melt viscosity of aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters with super-critical gases

Catalyst for the preparation of bisphenols

Process of regenerating sulfonic acid cation exchange resins with a mercaptoethylamine or thiazolidine

Two-stage process for the manufacture of thermoplastic polycarbonate

Process for isolating polycarbonates from their solutions with tube having cross sectional contrictions

Process for the preparation of aromatic dicarboxylic acid dichlorides

Process for the preparation of high molecular thermoplastic polycarbonates of low flammability

Process for the production of polycarbonate of constant viscosity

Method for reprocessing aqueous extract solutions obtained in the production of PA 6 or copolyamide

Process for the production of high-purity bisphenol A

Ionic exchangers modified with thiazolines

Molding compounds of thermoplastic polyamide and graft rubber

Purification of p,p-bisphenolate solutions

Washing of polycarbonates with cascading train of centrifuges

Polyamide moulding compositions containing finely divided polyarylene sulphides

Process for recovering thermoplastic polymers from dispersion

Process for the preparation of neutral phosphorous acid aryl esters

Process for the preparation of polycarbonates catalyzed by cyclic aza compounds

Method of producing ABS moulding compositions

Process for the production of neutral phosphoric acid esters

Process for the production of phosphoric acid triesters

Crystalline adduct of bisphenol A and bisphenol TMC

Abietic acid derivatives and their use as emulsifiers

Production of ultrafine suspensions of bisphenol, sodium hydroxide and water

Process for the isolation of partially crystalline polycarbonate powder

Use of carbonates as demoulding agents for thermoplastic polycarbonates

Isomerization of bisphenols