US20120055593A1 - Gas generating composition - Google Patents
Gas generating composition Download PDFInfo
- Publication number
- US20120055593A1 US20120055593A1 US13/321,426 US201013321426A US2012055593A1 US 20120055593 A1 US20120055593 A1 US 20120055593A1 US 201013321426 A US201013321426 A US 201013321426A US 2012055593 A1 US2012055593 A1 US 2012055593A1
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- US
- United States
- Prior art keywords
- gas generating
- nitrate
- mass
- generating composition
- bcc
- 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.)
- Abandoned
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
Definitions
- the present invention relates to a gas generating composition that can be used for an inflator of a vehicle airbag apparatus.
- a combustion temperature of a gas generating agent needs to be reduced in order to obtain a small and light inflator for a vehicle airbag apparatus, which is highly demanded in recent years.
- reducing the combustion temperature of the gas generating agent often leads to a decrease in burning rate and an amount of generated gas.
- a method for increasing the amount of the gas generating agent for charging an inflator is considered, but with this method, a small and light inflator cannot be obtained.
- basic metal nitrate is disclosed as an oxygen-containing oxidizing agent, which is selected from among basic copper nitrate, basic cobalt nitrate, basic zinc nitrate, basic manganese nitrate, basic iron nitrate, basic molybdenum nitrate, basic bismuth nitrate and basic cerium nitrate, and it is described that the calorific value can be suppressed by adding aluminum hydroxide thereto.
- basic metal nitrate selected from among basic copper nitrate, basic cobalt nitrate, basic zinc nitrate, basic manganese nitrate, basic iron nitrate, basic molybdenum nitrate, basic bismuth nitrate and basic cerium nitrate can be used as an oxidizing agent.
- an oxygen-containing oxidizing agent selected from among metal nitrate, ammonium nitrate, a metal perchlorate salt, ammonium perchlorate, metal nitrite, metal chlorate, basic copper nitrate, basic cobalt nitrate, basic zinc nitrate, and basic manganese nitrate.
- JP-A No. 2006-76849 such a gas generating composition is disclosed that the content of basic copper carbonate exceeds 20% by weight, but is equal to or lower than 40 wt %, but because the content of the basic copper carbonate in the embodiments is only 22.0 wt %, the effects obtained in the cases including 30 or more wt % basic copper carbonate are not confirmed.
- the present invention provides a gas generating composition for use in an inflator of a vehicle airbag apparatus and the like, such that a reduction of the calorific value per mol of generated gas is achieved without impairing burning rate or gas output, and the gas generating composition having no problem with the amount of mist or harmful gas concentration generated in combustion, solving such problems that have not been fully solved in the above prior arts.
- the invention 1 provides a gas generating composition, containing fuel and an oxidizing agent, the oxidizing agent comprising basic copper carbonate, the composition having the content of the basic copper carbonate of more than 40% by mass and 60% by mass or lower, satisfying the following requirements (a) to (c):
- the gas generating composition of the present invention can reduce the calorific value per mol of generated gas without impairing the burning rate or the gas output, by utilizing a predetermined amount of basic copper carbonate, and is free of problems regarding the amount of mist or harmful gas concentration generated in combustion. Therefore, the gas generating composition of the present invention is useful for an inflator of a vehicle airbag apparatus.
- the present invention includes the following preferred embodiments 2 to 6:
- the gas generating composition according to the invention described above further including a carboxymethyl cellulose salt as a binder.
- the gas generating composition of the present invention or a molded article obtained therefrom can be used for, for example, an airbag inflator of a driver's side, an airbag inflator of a passenger side next to the driver, a side airbag inflator, an inflator for an inflatable curtain, an inflator for a knee bolster, an inflator for an inflatable seat belt, an inflator for a tubular system, and a gas generator for a pretensioner, of various vehicles.
- the gas generating composition of the present invention or an inflator that uses a molded article obtained from the gas generating composition may be of a pyrotechnic type in which a gas supply source is only a gas generating agent or of a hybrid type that uses both compressed gas, such as argon, and a gas generating agent.
- gas generating composition of the present invention or a molded article obtained therefrom can be also used as an igniting agent called an enhancer or a booster, which serves to transmit the energy of a detonator or a squib to the gas generating agent.
- the fuel used in the present invention can be a known fuel for a gas generating composition, for example, at least one selected from guanidine compounds, tetrazole compounds, triazine compounds, purine compounds, and amino-acid derivatives.
- Preferred guanidine compounds include guanidine nitrate, nitroguanidine, and guanylurea dinitramide.
- Preferred tetrazole compounds include 5-aminotetrazole and bitetrazole ammonium salt.
- Preferred triazine compounds include melamine, melamine cyanurate, melamine nitrate, melamine perchlorate, trihydrazinotriazine, and a nitrocompound of melamine.
- Preferred purine compounds include 8-azaguanine.
- Preferred amino-acid derivatives include glycine.
- the fuel used in the present invention can be two or more types of mixtures if necessary.
- problems are caused in the burning rate and the ignition ability of the gas generating composition, although the calorific value thereof can be made relatively low.
- the gas output of the gas generating composition becomes relatively low, although there are no problems in the burning rate or the ignition ability thereof.
- the guanidine nitrate and the nitroguanidine can be mixed to obtain a fuel that takes the advantages of the guanidine nitrate and the nitroguanidine and overcomes the disadvantages thereof.
- the content of the fuel used in the present invention is preferably 20 to 60% by mass, more preferably 25 to 55% by mass, or even more preferably 30 to 50% by mass, in the gas generating composition.
- the oxidizing agent used in the present invention contains basic copper carbonate.
- the content of the basic copper carbonate exceeds 40% by mass but is equal to or lower than 60% by mass, or preferably 42 to 60% by mass, in the gas generating composition.
- the basic copper carbonate in an amount of 40% by mass or lower cannot exert the effect of reducing the calorific value, and the basic copper carbonate exceeding 60% by mass impairs the ignition ability.
- An average particle diameter of the basic copper carbonate is preferably equal to or less than 5 ⁇ m, more preferably equal to or less than 3 ⁇ m, or even more preferably equal to or less than 1 ⁇ m.
- the average particle diameter was measured by particle size distribution measurement method based on laser scattering.
- a sample was dispersed in ion-exchange water and irradiated with 50-W ultrasonic waves for 60 seconds. The 50% accumulated value of particle volume was obtained. Average values obtained by two measurements were taken as average particle diameters.
- the oxidizing agent can further contain known oxidizing agent, such as one or more selected from among nitrate, basic metal nitrate, ammonium nitrate, metal perchlorate, ammonium perchlorate, metal nitrite, metal chlorate and the like.
- Examples of basic metal nitrate include one or more selected from among basic copper nitrate, basic cobalt nitrate, basic zinc nitrate, basic manganese nitrate, basic iron nitrate, basic molybdenum nitrate, basic bismuth nitrate and basic cerium nitrate.
- basic copper nitrate is preferred.
- nitrate examples include one or more selected from among alkali metal nitrates such as potassium nitrate and sodium nitrate, as well as alkaline earth metal nitrates such as strontium nitrate. Among these, strontium nitrate is preferred.
- the total content of the oxidizing agent used in the present invention is preferably 50 to 80% by mass, more preferably 50 to 75% by mass, or even more preferably 50 to 70% by mass in the gas generating composition.
- the gas generating composition according to the present invention can contain a known binder of a gas generating composition, if necessary.
- the binder include one or more selected from among carboxymethyl cellulose (CMC), carboxymethyl cellulose sodium salt (CMCNa), carboxymethyl cellulose potassium salt (CMCK), carboxymethyl cellulose ammonium salt (CMCNH 4 ), cellulose acetate, cellulose acetate butyrate (CAB), methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC), carboxymethyl ethyl cellulose (CMEC), microcrystalline cellulose, polyacrylamides, aminated compounds of polyacrylamide, polyacryl hydrazide, a copolymer of acrylamide and a metal salt of acrylic acid, a copolymer of polyacrylamide and a polyacrylic acid ester compound, polyvinyl alcohol (PVA
- Water-soluble cellulose derivatives (CMC, CMCNa, CMCK, CMCNH 4 , MC, EC, HEC, EHEC, HPC, CMEC), which are water-soluble binders, microcrystalline cellulose, PVA, guar gum, and starch are preferred as the binder. Above all, the water-soluble cellulose derivatives are preferred, CMC, CMCNa, CMCK and CMCNH 4 are more preferred, and CMCNa is even more preferred.
- the content of the binder used in the present invention is preferably 0.5 to 30 parts by mass, more preferably 1 to 20 parts by mass, or even more preferably 2 to 15 parts by mass, with respect to a total of 100 parts by mass of the fuel and the oxidizing agent.
- the gas generating composition according to the present invention can include a known additive of a gas generating composition, such as a combustion catalyst, a heat absorbing agent, a slag forming agent, a lubricant or the like, according to necessity.
- a gas generating composition such as a combustion catalyst, a heat absorbing agent, a slag forming agent, a lubricant or the like
- the known additive include metal oxides such as copper oxide, iron oxide, zinc oxide, cobalt oxide, manganese oxide, molybdenum oxide, nickel oxide, bismuth oxide, silica, and alumina; metal hydroxides such as aluminum hydroxide, cobalt hydroxide, iron hydroxide, and magnesium hydroxide; metal carbonates or basic metal carbonates such as cobalt carbonate, calcium carbonate, and basic zinc carbonate; complex compounds of metal oxides or hydroxides, such as Japanese acid clay, kaolin, talc, bentonite, diatomaceous earth, and hydrotalcite; ammonium
- the additive used in the present invention may be in such an amount that does not have a great impact on the advantageous effects of the present invention in the calorific value, the gas output and the burning rate.
- the content of the additive is preferably 0.5 to 30 parts by mass, more preferably 1 to 25 parts by mass, or even more preferably 2 to 20 parts by mass, with respect to a total of 100 parts by mass of the fuel and the oxidizing agent.
- the gas generating composition according to the present invention satisfies the following requirements (a) to (c), and preferably, also satisfies a requirement (d):
- composition according to the present invention can be molded into a desired shape, and a cylindrical molded article, a cylindrical molded article with a single hole, a perforated cylindrical molded article, or a pellet-shaped molded article can be obtained.
- These molded articles can be manufactured by a method in which water or an organic solvent is added to and mixed with the composition and the obtained mixture is extrusion-molded (into the cylindrical molded article, the cylindrical molded article with a single hole, or a perforated cylindrical molded article), or by a compression-molding method using a pelletizer or the like (the pellet-shaped molded article).
- the components of the gas generating composition were adequately mixed in the proportions shown in Table 1, and thereafter 30 g thereof was obtained.
- Water in an amount of 6 g was added thereto, which was then mixed in an antistatic plastic bag for 5 minutes or longer.
- the resultant mass was pulverized into small pieces and dried at 110° C. for two hours.
- the resultant product was then pulverized into powder in a mortar. 1.7 to 2.2 g of the powder was poured into a mold and the pressure of approximately 220 MPa (2250 kgf/cm 2 ) was applied with a hydraulic pump, which was maintained for five seconds, to obtain a cylindrical strand (with a outer diameter of 9.55 mm and a length of 12.70 mm).
- the measuring strand obtained in the manner described above was left in a temperature of 110° C. for 16 hours to eliminate water therefrom. Subsequently, an epoxy resin adhesive “Bond Quick 30” was applied twice to the side surface and one side of the measuring strand so as to ignite and combust the measuring strand from an end surface thereof.
- the resultant strand was installed in an SUS sealed bomb (internal volume thereof was 1 L), and the bomb was pressurized up to 7 MPa, while the inside thereof was purged with nitrogen.
- a voltage of 12 V was applied to a nichrome wire in contact with the end surface of the measuring strand, thereby igniting and combusting the measuring strand by means of the fusing energy of the nichrome wire.
- the length of the measuring strand obtained prior to the combustion was divided by the time that has elapsed since the start of the combustion until when the peak of pressure rise was obtained, and the value obtained by this calculation was taken as the burning rate.
- the gas output, the calorific value per mol of generated gas, and the combustion temperature were calculated through a simulation using a thermochemical equilibrium calculation program “NEWPEP.”
- Powdered ingredients to include in the gas generating composition were each weighed such that the mass of the gas generating composition would be 1 g, and they were mixed adequately.
- the friction sensitivity and the drop-hammer sensitivity of the obtained powder sample were measured based on the explosive performance test method disclosed in Japanese Industrial Standard (JIS) K4810-1979.
- thermogravimetry The same gas generating composition as the one used in the method for measuring the friction sensitivity and the drop-hammer sensitivity was used to perform thermogravimetry by using a thermobalance (TGDTA6300 manufactured by Seiko Epson Corporation). The temperature at which the mass is reduced was taken as a decomposition temperature.
- the measuring strand (with an outer diameter of 9.55 mm and mass of 2.00 g) obtained in the same method as the one described above was left in a temperature of 110° C. for 16 hours to eliminate water therefrom, the measuring strand was installed in an SUS sealed bomb (internal volume thereof was 1 L), and the bomb was pressurized up to 7 MPa, while the inside thereof was purged with nitrogen. After the pressure inside the bomb was stabilized, a predetermined current was passed into a nichrome wire in contact with the end surface of the measuring strand, thereby igniting and combusting the measuring strand by means of the fusing energy of the nichrome wire.
- compositions shown in Table 1 were measured in the manners shown in Table 1.
- Example 1 NQ/BCC/BCN 38.70/42.00/19.30 7.4
- Example 2 GUDN/BCC/BCN 47.84/42.00/10.16 7.9
- Example 3 NQ/BCC/SrN 37.49/52.00/10.51 8.3
- Example 4 GN/NQ/BCC/BCN 15.95/23.93/42.00/18.12 7.7
- Example 5 GN/NQ/BCC/BCN 20.09/20.09/42.00/17.82 7.5
- Example 6 GN/NQ/BCC/BCN 18.77/18.77/52.00/10.46 7.0
- Example 7 GN/NQ/BCC/BCN 27.14/13.57/42.00/17.29 7.0
- Example 8 GN/NQ/BCC/SrN 21.14/21.14/42.00/15.72 7.5
- Example 9 GN/NQ/BCC/SrN 19.38/19.38/52.00/9.24
- Example 1 2.37 86.4 1692
- Example 2 2.57 74.2 1425
- Example 3 2.32 88.2 1736
- Example 4 2.46 82.9 1605
- Example 5 2.48 81.4 1584
- Example 6 2.38 74.6 1440
- Example 7 2.51 79.0 1532
- Example 8 2.51 90.4 1791
- Example 9 2.40 80.2 1568
- Example 10 2.33 73.7 1425
- Example 11 2.43 81.3 1584
- Example 12 2.39 77.6 1508
- Example 13 2.55 82.5 1623
- Example 14 2.46 77.4 1509
- Example 15 2.43 87.9 1744
- Example 16 2.36 83.0 1636
- Example 17 2.57 89.1 1775
- Example 18 2.45 79.4 1556
- Example 19 2.30 70.3 1329
- Example 20 2.30 65.7 1253
- GN Guanidine nitrate NQ: Nitroguanidine GUDN: Guanylurea dinitramide Mel: Melamine MC: Melamine cyanurate BCC: Basic copper carbonate (average particle diameter is approximately 1 ⁇ m) BCN: Basic copper nitrate SrN: Strontium nitrate CMCNa: Carboxymethyl cellulose sodium salt Al (OH) 3 : Aluminum hydroxide
- compositions shown in Table 2 were measured in the manners shown in Table 2.
- the friction sensitivities were, according to the JIS grades, Grade 7, indicating that the compositions are in the safest level, or Grade 6, indicating that the compositions can be handled safely.
- the drop-hammer sensitivities were, according to the JIS grades, Grade 8, indicating that the compositions are in the safest level.
- a decomposition start temperature was 150° C. or above, which is in a decomposition start temperature range where the compositions can withstand during welding for manufacturing an inflator. Therefore, it is confirmed that all of the compositions are less dangerous, can be manufactured safely, and are practical.
- compositions shown in Table 3 were measured in the manners shown in Table 3.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009122918A JP5441497B2 (ja) | 2009-05-21 | 2009-05-21 | ガス発生剤組成物 |
JP2009122918 | 2009-05-21 | ||
PCT/JP2010/058154 WO2010134466A1 (fr) | 2009-05-21 | 2010-05-14 | Composition génératrice de gaz |
Publications (1)
Publication Number | Publication Date |
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US20120055593A1 true US20120055593A1 (en) | 2012-03-08 |
Family
ID=43126147
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/321,426 Abandoned US20120055593A1 (en) | 2009-05-21 | 2010-05-14 | Gas generating composition |
Country Status (5)
Country | Link |
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US (1) | US20120055593A1 (fr) |
EP (1) | EP2444383B1 (fr) |
JP (1) | JP5441497B2 (fr) |
CN (1) | CN102428056B (fr) |
WO (1) | WO2010134466A1 (fr) |
Cited By (10)
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US20130340900A1 (en) * | 2011-03-31 | 2013-12-26 | Daicel Corporation | Gas generating composition |
US9321956B2 (en) | 2012-11-28 | 2016-04-26 | Halliburton Energy Services, Inc. | Methods for hindering the settling of particulates in a subterranean formation |
EP2910538A4 (fr) * | 2012-10-18 | 2016-06-29 | Daicel Corp | Composition d'agent générant du gaz |
US9487454B2 (en) | 2011-03-23 | 2016-11-08 | Diacel Corporation | Gas generating composition |
US9790774B2 (en) | 2014-01-02 | 2017-10-17 | Halliburton Energy Services, Inc. | Generating and maintaining conductivity of microfractures in tight formations by generating gas and heat |
US20170334802A1 (en) * | 2016-05-23 | 2017-11-23 | Tk Holdings Inc. | Gas generating compositions and methods of making and using thereof |
US9926949B2 (en) | 2014-04-15 | 2018-03-27 | Tk Holdings Inc. | Silicone propelled pedestrian hood lifter and seatbelt pre-tensioner |
US9988321B2 (en) | 2012-10-18 | 2018-06-05 | Daicel Corporation | Gas generating composition |
US10301917B2 (en) | 2015-07-24 | 2019-05-28 | Halliburton Energy Services, Inc. | Microbubbles for treatment chemical delivery in subterranean formations |
US10626321B2 (en) | 2015-07-24 | 2020-04-21 | Halliburton Energy Services, Inc. | Microbubbles for heat and/or gas generation in subterranean formations |
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CN112010719B (zh) * | 2019-05-29 | 2021-11-30 | 南京理工大学 | 一种含铝炸药及其制备方法 |
WO2022071462A1 (fr) * | 2020-10-01 | 2022-04-07 | 株式会社ダイセル | Composition d'agent de génération de gaz |
US20240017011A1 (en) | 2020-11-11 | 2024-01-18 | Daicel Corporation | Device assembly for needleless syringe |
CN114505615B (zh) * | 2022-02-28 | 2023-01-17 | 山东大学 | 一种深海湿法fcaw专用药芯焊丝及制备方法 |
WO2023167222A1 (fr) * | 2022-03-03 | 2023-09-07 | 株式会社ダイセル | Composition d'agent générateur de gaz |
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US20060054257A1 (en) * | 2003-04-11 | 2006-03-16 | Mendenhall Ivan V | Gas generant materials |
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JP4302442B2 (ja) * | 2002-09-12 | 2009-07-29 | ダイセル化学工業株式会社 | ガス発生剤組成物 |
JP4672975B2 (ja) * | 2002-10-31 | 2011-04-20 | ダイセル化学工業株式会社 | ガス発生剤組成物 |
JP2006076849A (ja) * | 2004-09-10 | 2006-03-23 | Nippon Kayaku Co Ltd | ガス発生剤組成物及びこれを有するガス発生器 |
JP5422096B2 (ja) * | 2006-11-02 | 2014-02-19 | 株式会社ダイセル | ガス発生剤組成物 |
JP5085926B2 (ja) * | 2006-12-21 | 2012-11-28 | 株式会社ダイセル | ガス発生剤組成物 |
-
2009
- 2009-05-21 JP JP2009122918A patent/JP5441497B2/ja active Active
-
2010
- 2010-05-14 US US13/321,426 patent/US20120055593A1/en not_active Abandoned
- 2010-05-14 EP EP10777699.9A patent/EP2444383B1/fr active Active
- 2010-05-14 WO PCT/JP2010/058154 patent/WO2010134466A1/fr active Application Filing
- 2010-05-14 CN CN201080021550.1A patent/CN102428056B/zh active Active
Patent Citations (2)
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US5386775A (en) * | 1993-06-22 | 1995-02-07 | Automotive Systems Laboratory, Inc. | Azide-free gas generant compositions and processes |
US20060054257A1 (en) * | 2003-04-11 | 2006-03-16 | Mendenhall Ivan V | Gas generant materials |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9487454B2 (en) | 2011-03-23 | 2016-11-08 | Diacel Corporation | Gas generating composition |
US9458065B2 (en) * | 2011-03-31 | 2016-10-04 | Daicel Corporation | Gas generating composition |
US20130340900A1 (en) * | 2011-03-31 | 2013-12-26 | Daicel Corporation | Gas generating composition |
US9988321B2 (en) | 2012-10-18 | 2018-06-05 | Daicel Corporation | Gas generating composition |
EP2910538A4 (fr) * | 2012-10-18 | 2016-06-29 | Daicel Corp | Composition d'agent générant du gaz |
US9321956B2 (en) | 2012-11-28 | 2016-04-26 | Halliburton Energy Services, Inc. | Methods for hindering the settling of particulates in a subterranean formation |
US9790774B2 (en) | 2014-01-02 | 2017-10-17 | Halliburton Energy Services, Inc. | Generating and maintaining conductivity of microfractures in tight formations by generating gas and heat |
US9926949B2 (en) | 2014-04-15 | 2018-03-27 | Tk Holdings Inc. | Silicone propelled pedestrian hood lifter and seatbelt pre-tensioner |
US10301917B2 (en) | 2015-07-24 | 2019-05-28 | Halliburton Energy Services, Inc. | Microbubbles for treatment chemical delivery in subterranean formations |
US10626321B2 (en) | 2015-07-24 | 2020-04-21 | Halliburton Energy Services, Inc. | Microbubbles for heat and/or gas generation in subterranean formations |
US20170334802A1 (en) * | 2016-05-23 | 2017-11-23 | Tk Holdings Inc. | Gas generating compositions and methods of making and using thereof |
WO2017205257A1 (fr) * | 2016-05-23 | 2017-11-30 | Tk Holdings Inc. | Compositions de generation de gaz et procédés de fabrication et d'utilisation associés |
CN109219539A (zh) * | 2016-05-23 | 2019-01-15 | 均胜安全系统收购有限责任公司 | 产气组合物及其制备和使用方法 |
US10358393B2 (en) * | 2016-05-23 | 2019-07-23 | Joyson Safety Systems Acquisition Llc | Gas generating compositions and methods of making and using thereof |
Also Published As
Publication number | Publication date |
---|---|
CN102428056A (zh) | 2012-04-25 |
WO2010134466A1 (fr) | 2010-11-25 |
JP5441497B2 (ja) | 2014-03-12 |
CN102428056B (zh) | 2014-03-12 |
EP2444383A4 (fr) | 2014-01-01 |
JP2010269969A (ja) | 2010-12-02 |
EP2444383A1 (fr) | 2012-04-25 |
EP2444383B1 (fr) | 2019-08-07 |
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AS | Assignment |
Owner name: DAICEL CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KOBAYASHI, SYOUJI;REEL/FRAME:027258/0501 Effective date: 20111027 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |