公开(公告)号：SE7611775A

公开(公告)日：1977-04-25

申请号：SE7611775

申请日：1976-10-22

Applicant: HOECHST AG

Inventor： HOLST A ,  LASK H

IPC: A61F13/472 ,  A61F13/15 ,  A61F13/20 ,  A61F13/49 ,  A61F13/53 ,  A61L15/28 ,  A61L15/60 ,  A61F13/00

CPC classification number: A61F13/513 ,  A61F13/202 ,  A61F13/511 ,  A61F13/534 ,  A61F2013/51409 ,  A61F2013/530481 ,  A61F2013/53445 ,  A61L15/28 ,  A61L15/60 ,  Y10T428/249965 ,  Y10T428/31978 ,  Y10T428/31986 ,  C08L1/26

公开(公告)号：SE7605139L

公开(公告)日：1976-11-08

申请号：SE7605139

申请日：1976-05-05

Applicant: HOECHST AG

Inventor： HOLST A ,  LASK H ,  KOSTRZEWA M

IPC: A61F13/472 ,  A61F13/15 ,  A61F13/53 ,  A61L15/28 ,  A61L15/60 ,  B01J20/24 ,  B01J20/281 ,  C08B11/187 ,  C08B11/193 ,  C08B15/00 ,  C08B15/10 ,  G01N30/88 ,  C08B11/00

Abstract: This invention relates to an improvement in the process for the production of water-adsorbing, but at least partially water-insoluble cellulose ethers in which cellulose is alkalized in a liquid reaction medium and etherified in a manner such that by etherification only an at least largely water-soluble carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose or methyl hydroxyethyl cellulose is produced, and in which the cellulose is reacted in an alkaline reaction medium before, during, or after the etherification with a modification agent reactive with the still free hydroxyl groups of the cellulose anhydro glucose groups, said modification agent having one of the formulae I II in which R1 is hydroxyl, an acylamino or esterified carbamino group, and R2 is hydrogen or a carboxyl group, THE IMPROVEMENT COMPRISING EFFECTING ALKALIZATION, ETHERIFICATION, AND MODIFICATION IN A LIQUID REACTION MEDIUM OTHER THAN ISOPROPYL ALCOHOL.

公开(公告)号：BR7409850A

公开(公告)日：1976-05-25

申请号：BR985074

申请日：1974-11-25

Applicant: HOECHST AG

Inventor： LASK H ,  BUCHBERGER G ,  HOLST A ,  KOSTRZEWA M

IPC: C09K3/32 ,  B01J20/22 ,  C02F1/28 ,  C02F1/40 ,  C02F1/68 ,  B01D15/00

公开(公告)号：ZA747503B

公开(公告)日：1976-01-28

申请号：ZA747503

申请日：1974-11-25

Applicant: HOECHST AG

Inventor： BUCHBERGER G ,  KOSTRZEWA M ,  LASK H ,  HOLST A

IPC: C09K3/32 ,  B01J20/22 ,  C02F1/28 ,  C02F1/40 ,  C02F1/68 ,  B01J

公开(公告)号：ZA747407B

公开(公告)日：1975-12-31

申请号：ZA747407

申请日：1974-11-19

Applicant: HOECHST AG

Inventor： LASK H ,  HOLST A

IPC: C08B11/187 ,  A61L15/28 ,  C08B11/14 ,  C08B11/193 ,  C08B15/10 ,  C08B

Abstract: This invention relates to an improvement in the process for the production of water-adsorbing, but largely water-insoluble, cellulose ethers, in which cellulose is alkalized in the presence of alkali and isopropanol as a reaction medium and is so reacted with an etherification agent that by etherification only a water-soluble cellulose ether is produced, and in which process a modification agent which is able to react with the still free hydroxyl groups of the cellulose anhydro glucose groups in an alkaline reaction medium is reacted before, during, or after the etherification, the improvement comprising effecting the etherification of cellulose to carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose, or methylhydroxyethyl cellulose, reacting with the modification agent in the presence of 0.8 to 7.5 parts by weight of isopropanol, based upon the cellulose weight, and employing a modification agent being one of the formulae HOHH H ¦ PARALLEL ¦¦ ¦ (I) H2C=C-C-N-C-R1 and (II) H2C=C-SO2-NH2, ¦ R2 R1 in formula I being hydroxyl, or an acylamino or etherified carbamino group, and R2 in formula I being hydrogen or a carboxyl group.

公开(公告)号：ZA747282B

公开(公告)日：1975-11-26

申请号：ZA747282

申请日：1974-11-13

Applicant: HOECHST AG

Inventor： KOSTRZEWA M ,  LASK H ,  HOLST A

IPC: A61L15/28 ,  C08B11/00 ,  C08B11/187 ,  C08B15/10 ,  C08B ,  A61L

Abstract: This invention relates to an improvement in the process for the production of water-adsorbing, but largely water-insoluble, cellulose ethers, in which cellulose is alkalized in the presence of alkali hydroxide and isopropanol as a reaction medium and is so reacted with an etherification agent that by etherification only a water-soluble cellulose ether is produced, and in which process the cellulose is reacted with a cross-linking agent which is polyfunctional towards cellulose in an alkaline reaction medium before, during, or after the etherification of the cellulose, the improvement comprising effecting the etherification of cellulose to carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose, or methylhydroxyethyl cellulose, reacting the cellulose with the polyfunctional cross-linking agent in the presence of 0.8 to 7.5 parts by weight of isopropanol, based upon the cellulose weight, and employing as the cross-linking agent acrylamido methylene chloroacetamide, dichloroacetic acid or phosphorus oxychloride or a compound in which at least two groups functional towards cellulose are THE ACRYLIC AMINO GROUP CH2=CH-C-N- PARALLEL ¦ O the chlorine azomethine group -N=C- ¦ Cl OR THE ALLYLOXY AZOMETHINE GROUP -N=C-O-CH2-CH=CH2 . ¦

公开(公告)号：DK677674A

公开(公告)日：1975-08-25

申请号：DK677674

申请日：1974-12-23

Applicant: HOECHST AG

Inventor： HOLST A ,  KOSTRZEWA M ,  LASK H

IPC: C08L101/00 ,  A61L15/28 ,  B01J47/12 ,  C08J5/22 ,  C08J7/04 ,  C08J9/28 ,  C08L1/00 ,  C08L1/06 ,  C08L1/08 ,  C08L1/26 ,  C08L67/00 ,  C08L77/00 ,  D01F1/10 ,  D01F2/28 ,  D06M15/09 ,  C08K

Abstract: 1492040 Articles comprising cellulosic particles HOECHST AG 20 Dec 1974 [24 Dec 1973] 55196/74 Heading C3F [Also in Division B5] Cellulose ethers, inherently water-soluble but rendered at least partly water-insoluble, but still water-absorbent by cross-linking or other chemical modification, are uniformly distributed in, or over a surface of, a shaped article composed of a film- or fibre-forming polymer which is insoluble in water. The cellulose ether may be carboxymethyl-, hydroxyethyl-, or methylhydroxyethyl-cellulose and is preferably in the form of particles of a size within the range of from 0À01 to 2 mm. Several modifying agents are used, epichlorohydrin most commonly. The shaped articles in the examples are films of hydrated cellulose (from viscose), cellulose acetate and hydroxyethyl cellulose and fibres of polyethylene.

公开(公告)号：FI370974A

公开(公告)日：1975-06-25

申请号：FI370974

申请日：1974-12-20

Applicant: HOECHST AG

Inventor： HOLST A ,  KOSTRZEWA M ,  LASK H

IPC: C08L101/00 ,  A61L15/28 ,  B01J47/12 ,  C08J5/22 ,  C08J7/04 ,  C08J9/28 ,  C08L1/00 ,  C08L1/06 ,  C08L1/08 ,  C08L1/26 ,  C08L67/00 ,  C08L77/00 ,  D01F1/10 ,  D01F2/28 ,  D06M15/09 ,  C08B

Abstract: 1492040 Articles comprising cellulosic particles HOECHST AG 20 Dec 1974 [24 Dec 1973] 55196/74 Heading C3F [Also in Division B5] Cellulose ethers, inherently water-soluble but rendered at least partly water-insoluble, but still water-absorbent by cross-linking or other chemical modification, are uniformly distributed in, or over a surface of, a shaped article composed of a film- or fibre-forming polymer which is insoluble in water. The cellulose ether may be carboxymethyl-, hydroxyethyl-, or methylhydroxyethyl-cellulose and is preferably in the form of particles of a size within the range of from 0À01 to 2 mm. Several modifying agents are used, epichlorohydrin most commonly. The shaped articles in the examples are films of hydrated cellulose (from viscose), cellulose acetate and hydroxyethyl cellulose and fibres of polyethylene.

公开(公告)号：AU503577B2

公开(公告)日：1979-09-13

申请号：AU1630476

申请日：1976-07-28

Applicant: HOECHST AG

Inventor： HOLST A ,  DORR H-W ,  NISCHWITZ E ,  UHL K ,  LASK H ,  GROSSE L

IPC: A61F13/472 ,  A61F13/15 ,  A61F13/49 ,  A61F13/53 ,  A61L15/28 ,  D21H19/34 ,  A61F13/20 ,  A41B13/02 ,  D21H1/10 ,  D21H1/42 ,  D21H3/26

公开(公告)号：AU503025B2

公开(公告)日：1979-08-23

申请号：AU1374876

申请日：1976-05-07

Applicant: HOECHST AG

Inventor： HOLST A ,  LASK H ,  KOSTRZEWA M

IPC: A61F13/472 ,  A61F13/15 ,  A61F13/53 ,  A61L15/28 ,  A61L15/60 ,  C08B11/187 ,  C08B15/00 ,  C08B15/10 ,  C08B11/20

Abstract: This invention relates to an improvement in the process for the production of water-adsorbing, but at least partially water-insoluble, cellulose ethers in which cellulose is alkalized in a liquid reaction medium and etherified in a manner such that by etherification only an at least largely water-soluble carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, hydroxyethyl cellulose or methyl hydroxyethyl cellulose is produced, and in which the cellulose is reacted in an alkaline reaction medium before, during, or after the etherification with a cross-linking agent which is polyfunctional towards cellulose and selected from the group consisting of acrylamido methylene chloroacetamide, dichloroacetic acid, phosphorous oxychloride, or a compound in which at least two groups functional towards cellulose are the acrylamido group the chloroazomethine group the allyloxy azomethine group the improvement comprising effecting alkalization, etherification, and cross-linking in a liquid reaction medium other than isopropyl alcohol.