WO2000031143A1 - Triacetate de cellulose et procede de production associe - Google Patents
Triacetate de cellulose et procede de production associe Download PDFInfo
- Publication number
- WO2000031143A1 WO2000031143A1 PCT/JP1999/006337 JP9906337W WO0031143A1 WO 2000031143 A1 WO2000031143 A1 WO 2000031143A1 JP 9906337 W JP9906337 W JP 9906337W WO 0031143 A1 WO0031143 A1 WO 0031143A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cellulose triacetate
- weight
- reaction
- acetylation
- cellulose
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate
Definitions
- the present invention relates to a cellulose triacetate suitable as a protective film for a polarizing plate, a color filter, a film of a photographic light-sensitive material, and a fiber material, and a method for producing the same.
- Conventional technology a cellulose triacetate suitable as a protective film for a polarizing plate, a color filter, a film of a photographic light-sensitive material, and a fiber material, and a method for producing the same.
- the film obtained from cellulose triacetate is tough, has excellent dimensional stability and heat resistance, and has optical isotropy, so it supports optical films such as photographic photosensitive materials and protects polarizing plates in liquid crystal displays. Used for film, color filters, etc.
- fibers obtained from cellulose triacetate are widely used as various clothing fibers because of their excellent texture and gloss.
- Such cellulose triacetate is usually produced through an activation treatment, an acetylation treatment and a saponification aging treatment, followed by a purification and drying treatment.
- the saponification ripening process is performed to reduce the degree of acetylation to the target level.However, in order to shorten the processing time, heating is performed from the outside or water vapor is generated inside. It is performed at a temperature of 60 to 70 ° C by blowing or the like.
- An object of the present invention is to provide a cellulose triacetate capable of suppressing the generation of fine foreign substances that are difficult to filter and easily removing the foreign substances by filtration, and a method for producing the same.
- the present inventors have found that the reason why fine foreign matter is generated in the saponification ripening process is that, because the saponification reaction proceeds unevenly, the degree of acetylation of the produced cellulose triacetate varies, (Completely acetylated glucose units). It has been found that such a heterogeneous reaction causes temperature unevenness in the reaction system, specifically because the reaction system is partially exposed to a high temperature.
- the reaction system is in the form of a high-viscosity solution. If an external heating method is applied, the mixing of the high-viscosity solution that comes into contact with the inner wall of the container becomes insufficient even with the use of stirring means. However, as a result of that part being exposed to a high temperature for a long time, a low acetylation degree component is easily generated. On the other hand, when a heating method from the inside with superheated steam is applied, the cellulose triacetate precipitates at the portion where the superheated steam comes into contact with the condensed water to form a solid phase, so the saponification reaction does not proceed. High vinegar content components tend to remain.
- the present invention provides a cellulose triacetate having a closed constant (K) of 70 or less as measured by the following method.
- the present invention is a method for producing a cellulose Bok Riase Tate above including acetylation step and saponification ripening process Yes, cellulose triacetate that undergoes saponification ripening only by increasing the temperature due to the heat of reaction between the water added to stop the acetylation reaction and the remaining unreacted acetic anhydride without applying external heat in the saponification ripening process
- cellulose is acetylated, and then the reaction between the water added to stop the acetylation reaction and the remaining unreacted acetic anhydride is performed without external heat.
- This is a method for producing cellulose triacetate in which saponification aging treatment is performed only by increasing the temperature due to heat.
- the cellulose is pretreated, activated and acetylated, and then only by the temperature rise due to the heat of reaction between the water added to stop the acetylation reaction and the remaining unreacted acetic anhydride without external heat.
- the saponification and aging treatment is performed at a temperature of 40T to 60T.
- the cellulose triacetate of the present invention has a very small amount of fine foreign substances that are difficult to filter, so that foreign substances can be easily filtered without clogging even with a filter medium having a small pore size. For this reason, even when continuous spinning is performed for a long time using the cellulose triacetate of the present invention, for example, a fiber having a stable cross-sectional shape can be produced without blocking the spinning nozzle.
- the cellulose triacetate of the present invention has a closing constant (K) of 70 or less, preferably 60 or less, as measured by the following method.
- K closing constant
- the closing constant is 70 or less, the filterability is improved, and it becomes easy to remove inconvenient foreign matter by filtration in the spinning process.
- the tZV to t straight lines are described, for example, in “Polymer Engineering Course 4: Spinning of Chemical Fiber and Formation of Film (II)” (Polymer Society of Japan, 116-125, 1965). .
- the cellulose triacetate of the present invention has an average acetylation degree of preferably 59 to 62.5%, particularly preferably 59.5 to 62.0%, and further preferably 60 to 61.5%. If the average acetylation degree is 59% or more, moisture absorption of cellulose triacetate The mechanical strength, such as the modulus of elasticity and tensile strength at break, of the molded product can be increased because the strength can be reduced. When the average degree of acetylation is 62.5% or less, it can be obtained by a reaction with acetic anhydride using a sulfuric acid catalyst.
- the degree of acetylation can be measured according to the method for measuring the degree of acetylation of ASTM D-817-91 (test method for cellulose acetate, etc.).
- test method for cellulose acetate, etc. First, 1.9 g of dried cellulose triacetate was precisely weighed, dissolved in 150 ml of a mixed solvent of acetone and dimethyl sulfoxide (volume ratio 4: 1), and 30 ml of a 1N aqueous sodium hydroxide solution was added. Saponify at 25 ° C for 2 hours. Next, a phenolphthalein solution is added as an indicator, titrated with 1N-sulfuric acid with excess sodium hydroxide, and the degree of acetylation is calculated according to the following equation. A blank test is performed by the same method.
- A is the number of ml of 1N-sulfuric acid required for sample titration
- B is the number of m1 of 1N-sulfuric acid required for blank test titration
- F is the concentration factor of 1N-sulfuric acid
- W is The sample weight is shown).
- the cellulose triacetate of the present invention has a viscosity average degree of polymerization of preferably 200 to 400, particularly preferably 250 to 400, more preferably 270 to 400, most preferably 270 to 350.
- Those having an average degree of polymerization of 200 or more increase the strength of molded products such as films and fibers, and those having an average degree of polymerization of 400 or less maintain an appropriate viscosity at the time of solution preparation, so that handling becomes easy.
- This viscosity average polymerization degree can be measured by the limiting viscosity method of Uda et al. (Uda Kazuo, Saito Hideo, Journal of the Textile Society, Vol. 18, No. 1, pp. 105-120, 1962).
- a mixed solvent of methylene chloride methanol 91 (weight ratio) to prepare a solution having a predetermined concentration c (2.00 g / L).
- this solution is poured into an Ostwald viscometer, and the time t (second) that the solution passes between the marks on the viscometer is measured.
- the mixed solvent alone the filtration time was similarly set. (Seconds) and determine the viscosity average degree of polymerization (DP) from the following formula.
- the viscosity is preferably 200 to 700 mPa's, particularly preferably 250 to 600 mPa's, more preferably 250 to 600 mPa's. —50 OmPa's.
- pretreatment is activated by adding acetic acid to cellulose.
- the amount of acetic acid used in the activation of the pretreatment is preferably 10 to 500 parts by weight based on 100 parts by weight of cellulose.
- the pretreatment activation is preferably performed under closed and stirred conditions, preferably at 20 to 50, for 0.5 to 2 hours.
- the cellulose thus pretreated and activated is acetylated.
- sulfuric acid 5 to 15 parts by weight preferably 7 to 13 parts by weight, particularly preferably 8 to 11 parts by weight
- 200 to 400 parts by weight of acetic anhydride are added to 100 parts by weight of cellulose.
- 240-280 parts by weight and 300-600 parts by weight of acetic acid (preferably 350-500 parts by weight).
- the acetylation reaction be carried out at a temperature of about 40 to 90 minutes under stirring, at a substantially constant rate, and finally maintained at 30 to 55 ° C for 15 to 60 minutes.
- sulfuric acid is bonded to cellulose as a sulfuric acid ester by the acetylation reaction, the sulfuric acid ester is removed in the saponification ripening step after the reaction to improve thermal stability.
- water or an aqueous acetic acid solution is added to stop the acetylation reaction.
- the amount of water added is such that it reacts with acetic anhydride present in the reaction system to form acetic acid, and the water content of the reaction system after the saponification ripening treatment is about 2 to 10% by weight.
- the concentration of sulfate ion in the reaction system is increased by adding an aqueous solution of alkaline earth metal salt of acetic acid such as magnesium acetate or a mixed solution of acetic acid and water to form insoluble sulfate. Is preferably adjusted to 0.2 to 1.0%.
- the acetylation reaction can be stopped and the sulfate ion concentration can be reduced at the same time.
- the aging treatment is preferably performed at 40 to 60 ° C or at 40 to 60 ° C, particularly preferably at 45 to 55 ° C for 20 to 120 minutes. It is done by doing. At this time, the reaction temperature is maintained only by the heat of reaction between the added water and the remaining unreacted acetic anhydride as described above, without applying any heat to the inside and outside of the reaction system.
- the heat of reaction between water and acetic anhydride can be used to keep the entire reaction system uniform and at an appropriate temperature, so that the degree of acetylation is too high or too low. Things are prevented from being created.
- the cellulose triacetate of the present invention can be formed into various molded products after being dissolved in an organic solvent as required.
- organic solvent used for molding examples include halogenated hydrocarbons such as chloroform, dichloromethane, and dichloroethane; ethers having 3 to 12 carbon atoms, for example, diisopropyl ether, dimethoxymethane, dimethoxyethane, and 1,4.
- ketones having 3 to 12 carbon atoms for example, acetone, methylethylketone, getylketone, diisobutylketone, cyclohexanone and methylcyclo Hexanone
- esters having 3 to 12 carbon atoms such as ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl
- the ethers, ketones and esters may have a cyclic structure, and may have any of the functional groups of ethers, ketones and esters (- ⁇ , -CO- and -CO ⁇ _).
- An organic solvent having two or more for example, 2-ethoxyhexyl acetate, 2-Methoxyethanol and 2-butoxyethanol can be used.
- the number of carbon atoms may be within the specified range of the compound having any one of the functional groups.
- the organic solvent may have another functional group such as an alcoholic hydroxyl group.
- ethers, ketones and esters may be used in combination with other organic solvents.
- Organic solvents that can be used in combination are nitromethane, alcohols having 1 to 6 carbon atoms (methanol, ethanol, propanol, isopropanol, 1-butanol, t-butanol, 2-methyl-1-butanol). , Cyclohexanol) and the like.
- the proportion of ethers, ketones and esters in the mixed solvent is preferably from 10 to 99.5% by weight, more preferably from 20 to 99.5% by weight. Particularly preferred is 99% by weight, more preferably 40 to 98.5% by weight, and most preferably 60 to 98% by weight.
- the amount of the solvent to be used can be appropriately set in consideration of the moldability and the like, depending on the object to be molded.
- the concentration of cellulose triacetate is preferably 10 to 40% by weight, particularly preferably 10 to 30% by weight, more preferably 10 to 25% by weight, and most preferably 15 to 20% by weight. Is the amount
- plasticizers include phosphate esters, for example, triphenyl phosphate and tricresyl phosphate; phthalate esters, for example, dimethyl phthalate, getyl phthalate, dibutyl phthalate, octyl phthalate, and getyl hexyl phthalate.
- citrate for example, acetyl triethyl quenate and acetyl tributyl citrate
- other carboxylic acid esters for example, butyl oleate, methyl acetyl ricinoleate, dibutel sebacate, various trimellitate esters, etc. Or a combination of two or more types.
- phthalate plasticizers are preferable, and getyl phthalate is particularly preferable, in order to improve the wet heat resistance of the film.
- the cellulose triacetate film is produced by a solvent cast method using a cellulose triacetate solution.
- a prepared cellulose triacetate solution (dope) is cast on a mirror-finished support (eg, a drum or a band), dried, and then the film is peeled off. Drying is usually performed at normal pressure or reduced pressure at 20 to 250 ° C, preferably 30 to 200 ° C.
- the thickness of the film is appropriately determined in the range of 0.1 to 250 m according to the application. For example, the thickness of an optical thin film used to protect an IC mask is 0.1 to 3 ⁇ ⁇ , and the thickness of a packaging film is 10 to 50 inu. Is 50 to 250 / m.
- Cellulose triacetate fiber can be produced by spinning a cellulose triacetate solution (dope) and removing the solvent.
- the solvent removal in dry spinning to which dry or wet spinning can be applied is as described in the above film production. It can be carried out under the same drying conditions.
- the fineness of the cellulose ester fiber is preferably 1 to 16 denier, particularly preferably 1 to 10 denier, and further preferably 2 to 8 denier.
- the cross-sectional shape of the cellulose ester fiber can be circular, elliptical, irregular (eg, Y-shaped, X-shaped, I-shaped, R-shaped), or can be hollow.
- cellulose triacetate of the present invention can also be used for applications such as plastics, paint lacquers, and electrical insulating agents.
- the pretreatment was activated by spraying 100 parts by weight of cellulose pulp with 50 parts by weight of glacial acetic acid.
- a 15% by weight mixed solution of magnesium acetate and acetic acid-aqueous solution is added until the concentration of water in the solvent reaches 3.0% by weight and the concentration of sulfate ion becomes 0.5% by weight to decompose acetic anhydride.
- the temperature of the reaction system rose to 50 ° C due to the reaction between water and acetic anhydride.
- the saponification and aging treatment was carried out at the same temperature for 120 minutes without heating the reaction system from the outside to obtain cellulose triacetate having an acetylation degree of 61.3% and a viscosity average polymerization degree of 29.8.
- the closing constant of the obtained cellulose triacetate was 57.
- the pretreatment was activated by spraying 100 parts by weight of cellulose pulp with 50 parts by weight of glacial acetic acid.
- a mixed solution of 15% by weight of magnesium acetate and acetic acid-aqueous solution was added until the concentration of water in the solvent became 4.0% by weight and the concentration of sulfate ion became 0.4% by weight, and acetic anhydride was added.
- Decomposition stopped the acetylation reaction.
- the temperature of the reaction system rose to 48 ° C due to the reaction between water and acetic anhydride.
- the saponification and aging treatment was carried out at the same temperature for 60 minutes without heating the reaction system from the outside to obtain cellulose triacetate having an acetylation degree of 60.7% and a viscosity average polymerization degree of 308.
- the closing constant of the obtained cellulose triacetate was 46.
- the pretreatment was activated by spraying 100 parts by weight of cellulose pulp with 50 parts by weight of glacial acetic acid.
- a mixed solution of 15% by weight of magnesium acetate and acetic acid-aqueous solution was added until the concentration of water in the solvent became 4.5% by weight and the concentration of sulfate ion became 0.3% by weight, and acetic anhydride was added.
- Decomposition stopped the acetylation reaction.
- the reaction between water and acetic anhydride The temperature of the PT / JP 37 system rose to 52. Without heating the reaction system from the outside as it was, the mixture was subjected to aging treatment at the same temperature for 30 minutes to obtain cellulose triacetate having an acetylation degree of 60.8% and a viscosity average polymerization degree of 302.
- the closing constant of the obtained cellulose triacetate was 53.
- the pretreatment was activated by spraying 100 parts by weight of cellulose pulp with 50 parts by weight of glacial acetic acid.
- a mixed solution of 15% by weight of magnesium acetate and acetic acid-water mixture was added until the concentration of water in the solvent became 3.0% by weight and the concentration of sulfate ion became 0.5% by weight, and acetic anhydride was added. Decomposition stopped the acetylation reaction. At this time, the temperature of the reaction system rose to 5 O due to the reaction between water and acetic anhydride.Then, heating steam was blown into the mixture and the mixture was heated to 65. 0.9% of cellulose triacetate having a viscosity average degree of polymerization of 299 was obtained. The closing constant of the obtained cellulose triacetate was 94.
- the dope was continuously spun from a spinning nozzle having a total of 200 pores having a diameter of 30 zm at a discharge linear speed of 50 OmZ for 24 hours. As a result, the spinning state was the same as at the start after 24 hours, and when the pores were observed with an optical microscope after 24 hours, only deposits were observed in 25% or less of all the pores. It was.
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- Chemical Kinetics & Catalysis (AREA)
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99972647A EP1167391B1 (en) | 1998-11-19 | 1999-11-12 | Cellulose triacetate and process for producing the same |
DE69936465T DE69936465T2 (de) | 1998-11-19 | 1999-11-12 | Cellolosetriacetate und verfahren zur herstellung |
US09/831,454 US6683174B1 (en) | 1998-11-19 | 1999-11-12 | Cellulose triacetates and methods for producing the cellulose triacetates |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/329165 | 1998-11-19 | ||
JP32916598A JP4509239B2 (ja) | 1998-11-19 | 1998-11-19 | セルローストリアセテート及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000031143A1 true WO2000031143A1 (fr) | 2000-06-02 |
Family
ID=18218381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/006337 WO2000031143A1 (fr) | 1998-11-19 | 1999-11-12 | Triacetate de cellulose et procede de production associe |
Country Status (5)
Country | Link |
---|---|
US (1) | US6683174B1 (ja) |
EP (2) | EP1816141B1 (ja) |
JP (1) | JP4509239B2 (ja) |
DE (2) | DE69942844D1 (ja) |
WO (1) | WO2000031143A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016020952A1 (ja) * | 2014-08-04 | 2016-02-11 | 株式会社ダイセル | 酢酸セルロースフレーク及びその製造方法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW539678B (en) * | 2000-03-27 | 2003-07-01 | Daicel Chem | Acetyl cellulose and method for producing same |
US6924010B2 (en) | 2002-05-08 | 2005-08-02 | Eastman Chemical Company | Low solution viscosity cellulose triacetate and its applications thereof |
EP1501872A1 (en) * | 2002-05-08 | 2005-02-02 | Eastman Chemical Company | Low solution viscosity cellulose triacetate and its applications thereof |
JP4786909B2 (ja) * | 2005-02-01 | 2011-10-05 | ダイセル化学工業株式会社 | セルロース混酸エステル及びその製造方法 |
US9273195B2 (en) | 2010-06-29 | 2016-03-01 | Eastman Chemical Company | Tires comprising cellulose ester/elastomer compositions |
US20110319530A1 (en) | 2010-06-29 | 2011-12-29 | Eastman Chemical Company | Processes for making cellulose estate/elastomer compositions |
US9708475B2 (en) | 2011-12-07 | 2017-07-18 | Eastman Chemical Company | Cellulose esters in highly-filled elastomeric systems |
CN110077205B (zh) | 2013-10-07 | 2022-08-12 | 沙特基础工业全球技术有限公司 | 用于车辆的车辆部件及其制造方法和包括其的车辆 |
US10077343B2 (en) | 2016-01-21 | 2018-09-18 | Eastman Chemical Company | Process to produce elastomeric compositions comprising cellulose ester additives |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614501A (en) * | 1979-07-16 | 1981-02-12 | Mitsubishi Rayon Co Ltd | Cellulose triacetate solution and preparation thereof |
JPS63117001A (ja) * | 1986-11-05 | 1988-05-21 | Daicel Chem Ind Ltd | I型セルロ−ストリアセテ−トの製造方法 |
JPH09188701A (ja) * | 1995-03-31 | 1997-07-22 | Daicel Chem Ind Ltd | 物理強度に優れたセルロースアセテート、及びその製造法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3631023A (en) * | 1970-02-02 | 1971-12-28 | Celanese Corp | Continuous esterification of cellulose |
US4385172A (en) * | 1980-03-24 | 1983-05-24 | International Paper Company | Prevention of hornification of dissolving pulp |
JPS6017442B2 (ja) * | 1981-11-30 | 1985-05-02 | ダイセル化学工業株式会社 | 新規な酢酸セルロ−スの製造方法 |
SU1419988A1 (ru) * | 1986-02-12 | 1988-08-30 | Научно-исследовательский институт химии Саратовского государственного университета им.Н.Г.Чернышевского | Способ получени диацетата целлюлозы |
JPH05287120A (ja) * | 1992-04-09 | 1993-11-02 | Asahi Chem Ind Co Ltd | 生分解性フィルム |
JP3392470B2 (ja) * | 1992-09-24 | 2003-03-31 | ダイセル化学工業株式会社 | 二酢酸セルロース及びその製造方法 |
DE69327286T2 (de) * | 1992-09-24 | 2000-05-11 | Daicel Chem | Verfahren zur Herstellung eines Fettsäureesters von Cellulose |
JP3144957B2 (ja) * | 1992-09-24 | 2001-03-12 | ダイセル化学工業株式会社 | セルロース脂肪酸エステル及びその製造方法 |
JP3942668B2 (ja) * | 1995-03-31 | 2007-07-11 | ダイセル化学工業株式会社 | 成形性の高い酢酸セルロースおよびその製造法 |
US5914397A (en) * | 1995-03-31 | 1999-06-22 | Daicel Chemical Industries, Ltd. | Cellulose acetate excellent in physical strength, and process for production thereof |
JPH09272701A (ja) * | 1996-02-08 | 1997-10-21 | Daicel Chem Ind Ltd | 反応制御方法および反応制御装置 |
JPH09268201A (ja) * | 1996-04-01 | 1997-10-14 | Daicel Chem Ind Ltd | 酢酸セルロースの製造方法 |
JP3895801B2 (ja) * | 1996-04-19 | 2007-03-22 | ダイセル化学工業株式会社 | 溶解性の優れたセルロースエステル |
CA2262631A1 (en) * | 1996-07-10 | 1998-01-15 | Sound Pipe Ltd. | Acetylation of lignocellulosic materials and applications thereof |
JP3264361B2 (ja) * | 1996-07-30 | 2002-03-11 | ダイセル化学工業株式会社 | セルロースアセテート溶液の製造方法 |
JP3264362B2 (ja) * | 1996-07-30 | 2002-03-11 | ダイセル化学工業株式会社 | セルロースアセテート溶液の製造方法 |
JP3957792B2 (ja) * | 1996-07-30 | 2007-08-15 | ダイセル化学工業株式会社 | 成形性の高いセルロースアセテート、及びその製造方法 |
-
1998
- 1998-11-19 JP JP32916598A patent/JP4509239B2/ja not_active Expired - Lifetime
-
1999
- 1999-11-12 US US09/831,454 patent/US6683174B1/en not_active Expired - Lifetime
- 1999-11-12 DE DE69942844T patent/DE69942844D1/de not_active Expired - Lifetime
- 1999-11-12 EP EP07106806A patent/EP1816141B1/en not_active Expired - Lifetime
- 1999-11-12 WO PCT/JP1999/006337 patent/WO2000031143A1/ja active IP Right Grant
- 1999-11-12 EP EP99972647A patent/EP1167391B1/en not_active Expired - Lifetime
- 1999-11-12 DE DE69936465T patent/DE69936465T2/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614501A (en) * | 1979-07-16 | 1981-02-12 | Mitsubishi Rayon Co Ltd | Cellulose triacetate solution and preparation thereof |
JPS63117001A (ja) * | 1986-11-05 | 1988-05-21 | Daicel Chem Ind Ltd | I型セルロ−ストリアセテ−トの製造方法 |
JPH09188701A (ja) * | 1995-03-31 | 1997-07-22 | Daicel Chem Ind Ltd | 物理強度に優れたセルロースアセテート、及びその製造法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1167391A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016020952A1 (ja) * | 2014-08-04 | 2016-02-11 | 株式会社ダイセル | 酢酸セルロースフレーク及びその製造方法 |
JPWO2016020952A1 (ja) * | 2014-08-04 | 2017-05-18 | 株式会社ダイセル | 酢酸セルロースフレーク及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1167391A4 (en) | 2003-04-16 |
JP4509239B2 (ja) | 2010-07-21 |
DE69936465T2 (de) | 2007-11-08 |
DE69942844D1 (de) | 2010-11-18 |
EP1816141A2 (en) | 2007-08-08 |
EP1167391A1 (en) | 2002-01-02 |
EP1167391B1 (en) | 2007-07-04 |
DE69936465D1 (de) | 2007-08-16 |
US6683174B1 (en) | 2004-01-27 |
EP1816141A3 (en) | 2007-11-14 |
EP1816141B1 (en) | 2010-10-06 |
JP2000154202A (ja) | 2000-06-06 |
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