-
公开(公告)号：CA2146074A1
公开(公告)日：1995-10-06
申请号：CA2146074
申请日：1995-03-31
Applicant: HOECHST AG
Inventor： HILBIG JOSEF , DOENGES REINHARD
Abstract: Process for the preparation of low molecular weight polysaccharides ethers Process for the preparation of low molecular weight polysaccharide ethers which can be employed in binders for improving adhesive power and film-forming properties, by oxidative degradation of relatively high molecular weight polysaccharide ethers, which comprises initially introducing a relatively high molecular weight polysaccharide ether in suspension (e.g. in a slurry), adding a perborate or a mixture of perborate and perborate activator, and carrying out the oxidative degradation at a temperature of between 25 and 90.degree.C.
-
2.发明专利
公开(公告)号：HUT64978A
公开(公告)日：1994-03-28
申请号：HU9301647
申请日：1993-06-04
Applicant: HOECHST AG
Inventor： BARTZ UWE , DOENGES REINHARD , KLEHR HEINER
Abstract: The present invention relates to alkylhydroxyalkyl cellulose ethers characterised in that they contain, as further substituents, a sulphoalkyl group, to a process for the preparation of these cellulose ethers, and to building material mixtures based on gypsum, hydrated lime (lime hydrate) or cement and containing alkylhydroxyalkyl cellulose ethers containing sulphoalkyl groups.
-
公开(公告)号：FI925499A
公开(公告)日：1993-06-07
申请号：FI925499
申请日：1992-12-03
Applicant: HOECHST AG
Inventor： WALLISCH HEINZ , DOENGES REINHARD , MEYER-BLUMENROTH ULRICH
-
公开(公告)号：CA2084589A1
公开(公告)日：1993-06-07
申请号：CA2084589
申请日：1992-12-04
Applicant: HOECHST AG
Inventor： WALLISCH HEINZ , DOENGES REINHARD , MEYER-BLUMENROTH ULRICH
IPC: C08B11/20
Abstract: HOE 91/F 376 The invention relates to a process for the purifying working-up of liquid reaction media and/or wash media obtained during preparation of cellulose ethers, which are insoluble in hot water, from cellulose, an alkali metal hydroxide and at least one etherifying agent in a medium containing water and if appropriate at least one organic solvent, by ultrafiltration of the media into a permeate and concentrate, which comprises carrying out the ultrafiltration of the reaction media and/or wash media at a temperature at or above the flocculation temperature of the cellulose ethers.
-
公开(公告)号：BR8905958A
公开(公告)日：1990-06-19
申请号：BR8905958
申请日：1989-11-27
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , SPONHEIMER MANFRED , WELT GUENTHER , ZIEGELMAYER MANFRED
-
Patent Agency Ranking
公开(公告)号：HU193590B
公开(公告)日：1987-10-28
申请号：HU347484
申请日：1984-09-14
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , RUCKERT HANS , GEISSLER ULRICH , STEPPAN HARTMUT
IPC: C07D277/20 , C07D209/12 , C07D215/10 , C07D215/12 , C07D215/14 , C07D277/12 , C07D277/64 , C07D277/84 , C07D293/00 , C07D293/12 , C07D521/00 , C08F2/00 , C08F2/50 , C08G85/00 , G03C1/00 , G03C1/675 , G03F7/029 , C07D209/10 , C07D417/06 , C07D413/06 , C07D401/06 , C07D403/06 , G03C1/72 , G03C1/68 , G03F7/00
Abstract: Compounds of the formula I … … are described in which L denotes H or CO-(R )n(CX3)m, M denotes alkylene, alkenylene or arylene, Q denotes S, Se, O, dialkylmethylene, alken-1,2-ylene, 1,2-phenylene or N-R, where M + Q together form 3 or 4 ring members, R denotes alkyl, aralkyl or alkoxyalkyl, R denotes an aromatic group, and X denotes Cl, Br or I and n = 0 and m = 1 or n = 1 and m = 1 or 2. The compounds eliminate HX on irradiation and form radicals. They are therefore highly active acid donors and radical initiators for photochemical processes.
-
7.发明专利
公开(公告)号：CA1186431A
公开(公告)日：1985-04-30
申请号：CA430484
申请日：1983-06-15
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , HORN KLAUS
IPC: C08F2/00 , C08F2/46 , C08F2/48 , C08F2/50 , C08F2/54 , C08F20/00 , C08F20/10 , C08F20/38 , G03F7/027 , G03C1/68
Abstract: Disclosed are a photopolymerizable mixture and photopolymerizable copy materials made therefrom. The mixture contains a polymerizable compound having terminal acrylic or methacrylic acid ester groups and being selected from a compound of the formula I (I) wherein R1 is a naphthylene group, a biphenyldiyl group or a dinaphthyl-methanediyl group or a group formed by two phenylene groups which are linked by a bridge comprised of an oxygen atom, a sulphur atom, a sulfone group or an alkylene group which is substituted by at least one carboxylic acid group. carboxylic acid alkyl ester groups, halogen atom or phenyl group, or by such a substituted alkylene group which is connected to the group R1 of another molecule via said substituent; R2 is a hydrogen atom or a methyl group; and m is 0 or 1, m being 1 if R1 is a naphthylene group or a biphenyldiyl group.
-
公开(公告)号：FI93928C
公开(公告)日：1998-04-21
申请号：FI895602
申请日：1989-11-23
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , SPONHEIMER MANFRED , WELT GUENTHER , ZIEGELMAYER MANFRED
-
公开(公告)号：FI93928B
公开(公告)日：1995-03-15
申请号：FI895602
申请日：1989-11-23
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , SPONHEIMER MANFRED , WELT GUENTHER , ZIEGELMAYER MANFRED
-
10.发明专利
公开(公告)号：CA2119967A1
公开(公告)日：1994-09-28
申请号：CA2119967
申请日：1994-03-25
Applicant: HOECHST AG
Inventor： DOENGES REINHARD , REICHEL DIETHART , KESSLER BIRGIT
Abstract: of the disclosure Process for the preparation and work-up of N-hydroxy-alkylchitosans soluble in aqueous medium The present invention relates to a process for the preparation and work-up of N-hydroxyalkylchitosans soluble in aqueous media, comprising the measures - dispersion of chitosan in an aqueous medium, - subsequent hydroxyalkylation of the dispersed chitosan and - subsequent work-up of the N-hydroxyalkylchitosan, which comprises carrying out the hydroxyalkylation up to an average degree of substitution (DS) of 2.0, preferably 1.5 to 2.0, if desired removing some of the aqueous medium after the hydroxyalkylation and before the work-up and performing the work-up of the N-hydroxyalkylchitosan by drying.
-
-
-
-
-
-
-
-
-
Search Results
37
records
(took 0.021 seconds)
