ES2193963T3 - Procedimiento para fabricar eteres de celulosa con amarilleamiento y decoloracion reducidos. - Google Patents

Procedimiento para fabricar eteres de celulosa con amarilleamiento y decoloracion reducidos.

Info

Publication number
ES2193963T3
ES2193963T3 ES00936349T ES00936349T ES2193963T3 ES 2193963 T3 ES2193963 T3 ES 2193963T3 ES 00936349 T ES00936349 T ES 00936349T ES 00936349 T ES00936349 T ES 00936349T ES 2193963 T3 ES2193963 T3 ES 2193963T3
Authority
ES
Spain
Prior art keywords
cellulose ether
molecular weight
eteres
decoloration
cellulose
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.)
Expired - Lifetime
Application number
ES00936349T
Other languages
English (en)
Inventor
Steven Rosenberg
Michael V Spencer
Gary J Schulz
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.)
Dow Global Technologies LLC
Original Assignee
Dow Global Technologies LLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26838741&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2193963(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dow Global Technologies LLC filed Critical Dow Global Technologies LLC
Application granted granted Critical
Publication of ES2193963T3 publication Critical patent/ES2193963T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C08B11/02—Alkyl or cycloalkyl 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
    • C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Medicinal Preparation (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

Un procedimiento para preparar un éter de celulosa de bajo peso molecular, comprendiendo dicho procedimiento: (a) proporcionar un éter de celulosa de alto peso molecular de una viscosidad de aproximadamente 200 centipoises o más, en una solución acuosa al dos por ciento a 20oC; (b) poner en contacto el éter de celulosa de alto peso molecular con una cantidad de un ácido suficiente para despolimerizarlo parcialmente hasta un éter de celulosa de bajo peso molecular de una viscosidad de aproximadamente 100 cP o menor, a 20oC, en una solución acuosa al dos por ciento; (c) neutralizar parcial o sustancialmente el ácido por puesta en contacto del éter de celulosa de bajo peso molecular con un compuesto básico; (d) repetir las etapas (a)-(c) para producir dos o más tandas de producto discretas de éter de celulosa de bajo peso molecular, en las que al menos una tanda de producto discreta se neutraliza parcialmente a un pH de 6, 8 o menor; y (e) mezclar las dos o más tandas de producto discretas para formar una tanda de producto combinada de éter de celulosa de bajo peso molecular de un pH de 4 a 6, 8.
ES00936349T 1999-06-24 2000-05-26 Procedimiento para fabricar eteres de celulosa con amarilleamiento y decoloracion reducidos. Expired - Lifetime ES2193963T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14104699P 1999-06-24 1999-06-24
US09/416,783 US6306333B1 (en) 1999-06-24 1999-10-13 Process for making cellulose ethers having reduced yellowing and discoloration

Publications (1)

Publication Number Publication Date
ES2193963T3 true ES2193963T3 (es) 2003-11-16

Family

ID=26838741

Family Applications (1)

Application Number Title Priority Date Filing Date
ES00936349T Expired - Lifetime ES2193963T3 (es) 1999-06-24 2000-05-26 Procedimiento para fabricar eteres de celulosa con amarilleamiento y decoloracion reducidos.

Country Status (11)

Country Link
US (1) US6306333B1 (es)
EP (1) EP1194452B1 (es)
JP (1) JP5236849B2 (es)
KR (1) KR100662225B1 (es)
CN (1) CN1146578C (es)
AT (1) ATE240974T1 (es)
AU (1) AU5167300A (es)
DE (1) DE60002871T2 (es)
ES (1) ES2193963T3 (es)
MX (1) MXPA01012909A (es)
WO (1) WO2001000680A1 (es)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6820570B2 (en) 2001-08-15 2004-11-23 Nobel Biocare Services Ag Atomic layer deposition reactor
US7172886B2 (en) * 2001-12-06 2007-02-06 The Regents Of The University Of California Biosynthesis of isopentenyl pyrophosphate
US20040142558A1 (en) 2002-12-05 2004-07-22 Granneman Ernst H. A. Apparatus and method for atomic layer deposition on substrates
US7537662B2 (en) 2003-04-29 2009-05-26 Asm International N.V. Method and apparatus for depositing thin films on a surface
US7601223B2 (en) 2003-04-29 2009-10-13 Asm International N.V. Showerhead assembly and ALD methods
JP2005187376A (ja) * 2003-12-25 2005-07-14 Shin Etsu Chem Co Ltd 低置換度セルロースエーテル含有カプセル及びその製造方法
US8865432B2 (en) * 2004-02-26 2014-10-21 Shin-Etsu Chemical Co., Ltd. Method for preparing cellulose derivatives having solubility improved
US20070179292A1 (en) * 2004-05-26 2007-08-02 Spencer Michael V Production of low molecular weight ethylcellulose
KR101156365B1 (ko) * 2005-08-12 2012-06-13 신에쓰 가가꾸 고교 가부시끼가이샤 용해성이 개선된 셀룰로오스 유도체의 제조 방법
WO2007145709A1 (en) * 2006-06-14 2007-12-21 Dow Global Technologies Inc. Process for reducing the average molecular weight of cellulose ethers
US8920553B2 (en) * 2007-11-09 2014-12-30 Dow Global Technologies Llc Cellulose ether coating compositions and method
KR101586136B1 (ko) 2013-01-09 2016-01-15 신에쓰 가가꾸 고교 가부시끼가이샤 저중합도 셀룰로오스에테르의 제조 방법 및 이에 따라 제조된 셀룰로오스에테르
US9926385B2 (en) 2013-08-12 2018-03-27 Shin-Etsu Chemical Co., Ltd. Method for producing water-soluble cellulose ether having low degree of polymerization and method for producing film coating composition comprising same
KR102373750B1 (ko) 2016-10-06 2022-03-15 신에쓰 가가꾸 고교 가부시끼가이샤 저중합도 셀룰로오스 에테르의 제조 방법
MX2019013469A (es) * 2017-08-16 2020-02-07 Dow Global Technologies Llc Metodo para la preparacion controlada de eter de celulosa de bajo peso molecular.

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841037B1 (es) 1964-10-26 1973-12-04
JPS4830469B1 (es) * 1969-09-04 1973-09-20
US4048433A (en) 1976-02-02 1977-09-13 The Procter & Gamble Company Cellulose ethers having a low molecular weight and a high degree of methyl substitution
US4061859A (en) * 1976-06-14 1977-12-06 The Dow Chemical Company Viscosity reduction of cellulose derivatives
JPS6225101A (ja) 1985-07-24 1987-02-03 Shin Etsu Chem Co Ltd 低重合度セルロ−スエ−テルの製造方法
US5476668A (en) * 1990-08-24 1995-12-19 Shin-Etsu Chemical Co., Ltd. Base for film-coating pharmaceuticals and method for preparing same
EP0497985B1 (en) * 1990-08-24 1998-07-22 Shin-Etsu Chemical Co., Ltd. Coating base for pharmaceutical film and production thereof
ES2170288T3 (es) * 1991-05-31 2002-08-01 Scherer Technologies Inc R P Metodo y aparato para fabricar capsulas farmaceuticas de celulosa, con secado de la capsula.
TR27111A (tr) * 1992-06-06 1994-11-09 Hoechst Ag Sulfoakil grubu ihtiva eden alkilhidroksialkil selüloz eterleri.
JP3522002B2 (ja) * 1995-05-12 2004-04-26 信越化学工業株式会社 低重合度セルロースエーテルの製造方法
JPH1017701A (ja) * 1996-07-05 1998-01-20 Daicel Chem Ind Ltd セルロース誘導体の分解方法
FR2757173A1 (fr) 1996-12-17 1998-06-19 Warner Lambert Co Compositions polymeres d'origine non-animale pour la formation de films
JP3212534B2 (ja) * 1997-04-08 2001-09-25 信越化学工業株式会社 低置換度ヒドロキシプロピルセルロース粉末

Also Published As

Publication number Publication date
WO2001000680A1 (en) 2001-01-04
JP5236849B2 (ja) 2013-07-17
CN1146578C (zh) 2004-04-21
US6306333B1 (en) 2001-10-23
JP2003503557A (ja) 2003-01-28
EP1194452A1 (en) 2002-04-10
AU5167300A (en) 2001-01-31
DE60002871D1 (de) 2003-06-26
MXPA01012909A (es) 2002-07-30
CN1353720A (zh) 2002-06-12
KR20020016847A (ko) 2002-03-06
EP1194452B1 (en) 2003-05-21
ATE240974T1 (de) 2003-06-15
DE60002871T2 (de) 2004-03-11
KR100662225B1 (ko) 2007-01-02

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