DE3009149A1 - Verfahren zum veraethern von cellulosen - Google Patents

Verfahren zum veraethern von cellulosen

Info

Publication number
DE3009149A1
DE3009149A1 DE19803009149 DE3009149A DE3009149A1 DE 3009149 A1 DE3009149 A1 DE 3009149A1 DE 19803009149 DE19803009149 DE 19803009149 DE 3009149 A DE3009149 A DE 3009149A DE 3009149 A1 DE3009149 A1 DE 3009149A1
Authority
DE
Germany
Prior art keywords
cellulose
cmc
mercerized
solution
viscosity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19803009149
Other languages
German (de)
English (en)
Other versions
DE3009149C2 (it
Inventor
Hideaki Yatsushiro Kumamoto Mukohyama
Motoyasu Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kohjin Holdings Co Ltd
Kohjin Co
Original Assignee
Kohjin Holdings Co Ltd
Kohjin Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kohjin Holdings Co Ltd, Kohjin Co filed Critical Kohjin Holdings Co Ltd
Priority to DE19803009149 priority Critical patent/DE3009149A1/de
Publication of DE3009149A1 publication Critical patent/DE3009149A1/de
Application granted granted Critical
Publication of DE3009149C2 publication Critical patent/DE3009149C2/de
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/193—Mixed ethers, i.e. ethers with two or more different etherifying groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
DE19803009149 1980-03-10 1980-03-10 Verfahren zum veraethern von cellulosen Granted DE3009149A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803009149 DE3009149A1 (de) 1980-03-10 1980-03-10 Verfahren zum veraethern von cellulosen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803009149 DE3009149A1 (de) 1980-03-10 1980-03-10 Verfahren zum veraethern von cellulosen

Publications (2)

Publication Number Publication Date
DE3009149A1 true DE3009149A1 (de) 1981-09-24
DE3009149C2 DE3009149C2 (it) 1991-07-18

Family

ID=6096764

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803009149 Granted DE3009149A1 (de) 1980-03-10 1980-03-10 Verfahren zum veraethern von cellulosen

Country Status (1)

Country Link
DE (1) DE3009149A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497985A1 (en) * 1990-08-24 1992-08-12 Shin-Etsu Chemical Co., Ltd. Coating base for pharmaceutical film and production thereof
US5476668A (en) * 1990-08-24 1995-12-19 Shin-Etsu Chemical Co., Ltd. Base for film-coating pharmaceuticals and method for preparing same
WO2000032636A1 (de) * 1998-11-27 2000-06-08 Wolff Walsrode Aktiengesellschaft Verfahren zur herstellung niedrigviskoser wasserlöslicher celluloseether

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523377A (en) * 1946-12-24 1950-09-26 Hercules Powder Co Ltd Preparation of cellulose ethers
US3338662A (en) * 1965-10-15 1967-08-29 Ricardo H Wade Production of fibrous cellulose ethers using iodide salts as catalysts
DE2016203A1 (de) * 1969-04-04 1970-10-08 The Dow Chemical Co. Midland, Mich. (V.St.A.) Verfahren zur Herabsetzung der Viskosität eines Celluloseäthers mit Wasserstoffperoxid
US3896108A (en) * 1974-05-10 1975-07-22 Hercules Inc Carboxyalkyl modified ethyl cellulose

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523377A (en) * 1946-12-24 1950-09-26 Hercules Powder Co Ltd Preparation of cellulose ethers
US3338662A (en) * 1965-10-15 1967-08-29 Ricardo H Wade Production of fibrous cellulose ethers using iodide salts as catalysts
DE2016203A1 (de) * 1969-04-04 1970-10-08 The Dow Chemical Co. Midland, Mich. (V.St.A.) Verfahren zur Herabsetzung der Viskosität eines Celluloseäthers mit Wasserstoffperoxid
US3896108A (en) * 1974-05-10 1975-07-22 Hercules Inc Carboxyalkyl modified ethyl cellulose

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Angew. Chem. 85, 868-869 (1973) *
Angew. Chem. 89, 521-533 (1977) *
J.Polymer Sei.Vol.17, 55-63 (1979) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497985A1 (en) * 1990-08-24 1992-08-12 Shin-Etsu Chemical Co., Ltd. Coating base for pharmaceutical film and production thereof
EP0497985A4 (en) * 1990-08-24 1993-10-13 Shin-Etsu Chemical Co., Ltd. Coating base for pharmaceutical film and production thereof
US5476668A (en) * 1990-08-24 1995-12-19 Shin-Etsu Chemical Co., Ltd. Base for film-coating pharmaceuticals and method for preparing same
WO2000032636A1 (de) * 1998-11-27 2000-06-08 Wolff Walsrode Aktiengesellschaft Verfahren zur herstellung niedrigviskoser wasserlöslicher celluloseether

Also Published As

Publication number Publication date
DE3009149C2 (it) 1991-07-18

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Legal Events

Date Code Title Description
8128 New person/name/address of the agent

Representative=s name: TUERK, D., DIPL.-CHEM. DR.RER.NAT. GILLE, C., DIPL

8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation