公开(公告)号：EP0930319A4

公开(公告)日：2000-02-02

申请号：EP97941244

申请日：1997-09-25

申请人： DAIKIN IND LTD

发明人： OTANI KATSUHIDE ,  MARUYA YOSHIKI ,  HIRAGA YOSHIYUKI ,  KOMATSU SATOSHI

IPC分类号： C08F2/10 ,  B01J3/00 ,  B01J19/18 ,  B01J19/24 ,  B01J19/26 ,  C08F2/16 ,  C08F14/18 ,  C08F214/18 ,  B01J10/00

CPC分类号： B01J19/26 ,  B01J3/008 ,  B01J19/18 ,  B01J19/2465 ,  B01J2219/00162 ,  B01J2219/00164 ,  B01J2219/00768 ,  B01J2219/182 ,  C08F14/18 ,  Y02P20/544 ,  C08F2/16

摘要： A process for the polymerization which comprises polymerizing batchwise at least one gaseous or super-critical fluorinated olefin monomer or a monomer mixture of the olefin monomer with other monomer copolymerizable with the olefin monomer in an aqueous medium while diffusing the olefin monomer or monomer mixture into the medium, wherein the quantity of the monomer or monomer mixture diffused in the medium prior to the polymerization is at least 80 % of the theoretical consumption of the monomer or monomer mixture which must be found if the polymerization occurs at a theoretical rate of polymerization. The process can attain a high rate of polymerization with the rate of polymerization being determined not by the diffusion of the monomeric gas.

公开(公告)号：EP1227110A4

公开(公告)日：2003-05-07

申请号：EP00954959

申请日：2000-08-24

申请人： DAIKIN IND LTD

发明人： IMANISHI HIROYUKI ,  HIRAGA YOSHIYUKI ,  NAMIMATSU MASAYUKI ,  KOMATSU SATOSHI

IPC分类号： C08F6/10 ,  C08F8/50 ,  B29C47/00

CPC分类号： C08F6/005 ,  C08F8/50 ,  C08F214/262 ,  C08F2800/20 ,  C08F2810/10 ,  C08F214/28 ,  C08F216/1408 ,  C08L27/18

摘要： After a melt-processable fluorine-containing copolymer is heated and molten, the copolymer is reheatd in a closed apparatus under a non-static condition at a temperature of, for example, 130 DEG C to the melting point of the fluorine-containing polymer, whereby a content of volatile materials in the copolymer is reduced to 30 % or less of an initial content of volatile materials. Thereby, the content of volatile materials in the melt-processable fluorine-containing copolymer, which has been once molten, can be effectively decreased without using a large apparatus while avoiding the contamination of the copolymer with foreign particles.

公开(公告)号：EP1541591A4

公开(公告)日：2008-10-15

申请号：EP03791360

申请日：2003-08-28

申请人： DAIKIN IND LTD

发明人： TSUKAMOTO MITSUO ,  OTOI KENJI ,  HIRAGA YOSHIYUKI ,  NAKAYA HIDEKI ,  ICHISAKA TOSHIKI

IPC分类号： C08F2/00 ,  B01J3/00 ,  C08F14/18

CPC分类号： C08F14/18 ,  B01J3/008 ,  Y02P20/544

摘要： The invention provides a process for the production of a fluoropolymer having a high molecular weight and a narrow molecular weight distribution. A process for the production of a fluoropolymer by continuous polymerization of a radical-polymerizable monomer in a specific reaction field, characterized in that the specific reaction field is in a supercritical state having a pressure of 40Mpa or below and a temperature lower than the lowest temperature at which the specific reaction field exhibits a supercritical state plus 100°C, that the radical -polymerizable monomer is a fluoroolefin monomer, and that the fluoropolymer has a weight-average molecular weight [Mw]in terms of polystyrene of 150,000 or above and an [Mw]/[Mn] ratio exceeding 1 and up to 3 (wherein [Mw] is as defined above and [Mn] is a number-average molecular weight in terms of polystyrene).

公开(公告)号：EP1260526A4

公开(公告)日：2008-10-01

申请号：EP00956959

申请日：2000-09-06

申请人： DAIKIN IND LTD

发明人： HIRAGA YOSHIYUKI ,  NAMIMATSU MASAYUKI ,  IMANISHI HIROYUKI ,  KOMATSU SATOSHI

IPC分类号： C08F14/26 ,  C08F8/06 ,  C08K3/18 ,  C08K3/28 ,  C08L27/18 ,  H01B3/44 ,  H01B7/02 ,  H01B7/28

CPC分类号： H01B3/445 ,  H01B7/2806

摘要： A fluorocopolymer which comprises tetrafluoroethylene units and hexafluoropropylene units, optionally contains perfluoro(alkyl vinyl ether) units, and has a melt flow rate (MFR) at 372 DEG C of 0.1 to 100 and in which the total amount (ppm) of alkali metals and alkaline earth metals contained therein is not larger than the value as calculated from the melt flow rate at 372 DEG C (MFR) using the equation (1): 5.2 x e + 2 but exceeds the value as calculated using the equation (2): 0.35 x e . An electrical wire or cable coated with the fluoropolymer retains the intact electrical properties of the electrical wire and does not suffer core wire corrosion, despite the presence of alkali and alkakine earth metals.

公开(公告)号：EP1083189A4

公开(公告)日：2006-03-15

申请号：EP99907884

申请日：1999-03-09

申请人： DAIKIN IND LTD

发明人： HIRAGA YOSHIYUKI ,  KOMATSU SATOSHI ,  NODA TOMOHISA ,  NAMIMATSU MASAYUKI ,  IMANISHI HIROYUKI

IPC分类号： C08F8/00 ,  C08F8/12 ,  C08F8/44 ,  C08F14/18 ,  B29B7/88 ,  C08J3/20

CPC分类号： C08F8/44 ,  C08F2800/10 ,  C08F2810/40 ,  C08F214/26 ,  C08F8/00

摘要： A compound comprising an alkali metal or alkaline earth metal is added to a fluorine-containing polymer comprising a carboxylic aid terminal group or a terminal group capable of forming a carboxylic acid group through hydrolysis by heating it at a temperature of 200 °C or higher, in an amount of 0.1 to 10 %, in terms of the number of the metal atom for the alkali metal or the alkaline earth metal, in terms of the number of an ammonia molecule for an ammonia and in terms of the number of an ammonium group for a compound comprising an ammonium group, and the resultant mixture is heated at a temperature of 200 °C or higher in an atmosphere containing moisture. By this method, an unstable terminal group such as a carboxylic acid group and the discoloration owing to the group can be effectively removed, and further an unstable bonding in a main chain can be eliminated, so that the resultant fluorine-containing polymer has an amount of unpaired electrons on carbon atoms as small as 1.0x1013 spins/g or less, as measured by electron spin resonance measurement.

公开(公告)号：EP1645572A4

公开(公告)日：2009-05-06

申请号：EP04747015

申请日：2004-07-05

申请人： DAIKIN IND LTD

发明人： NAKAYA HIDEKI ,  YABU TADAHIRO ,  TSUKAMOTO MITSUO ,  OTOI KENJI ,  HIRAGA YOSHIYUKI ,  IMAHORI YUJI

IPC分类号： C08F6/16 ,  B01D11/02 ,  C08F6/22

CPC分类号： C08F6/16 ,  C08F6/22 ,  C08L27/12

摘要： A method for purifying a material to be treated, characterized in that it comprises contacting a material to be treated containing a fluorine-containing surfactant with a substance [A], to thereby remove the fluorine-containing surfactant, wherein the substance [A] is a gas under standard conditions (105 Pa, 0°C); and a method for producing a coagulated material comprising a polymer from an aqueous dispersion. The method can be suitably employed for removing a fluorine-containing surfactant from a material to be treated containing the fluorine-containing surfactant.

公开(公告)号：EP1454920A4

公开(公告)日：2006-12-06

申请号：EP02778029

申请日：2002-11-01

申请人： DAIKIN IND LTD

发明人： TSUKAMOTO MITSUO ,  OTOI KENJI ,  NAKAYA HIDEKI ,  HIRAGA YOSHIYUKI ,  NODA TOMOHISA

IPC分类号： C08F14/18 ,  C08F2/00 ,  C08F2/02

CPC分类号： C08F14/18 ,  Y02P20/544

摘要： A process for fluoropolymer production which attains high productivity in a relatively low-temperature low-pressure atmosphere, which reduces the cost of commercial-scale production equipment, to thereby overcome the problem. The process comprises polymerizing one or more radical-polymerizable monomers in a specific reaction field, and is characterized in that the radical-polymerizable monomers comprise an ethylenic fluoromonomer, the specific reaction field is in a supercritical state, and the ratio of the monomer density [rhom] to the critical monomer density [rho0], [rhom/rho0], is 1.1 or higher.

公开(公告)号：EP1170303A4

公开(公告)日：2004-03-31

申请号：EP99951179

申请日：1999-11-01

申请人： DAIKIN IND LTD

发明人： HIRAGA YOSHIYUKI ,  KOMATSU SATOSHI ,  NODA TOMOHISA ,  UTSUMI YASUHIRO

IPC分类号： C08F6/00 ,  C08F8/00 ,  C08F14/00 ,  C08J3/00

CPC分类号： C08J3/00 ,  C08F8/00 ,  C08F2800/10 ,  C08J2327/12 ,  C08F214/26

摘要： A method by which unstable groups of a melt-processable fluoropolymer can be stabilized rapidly and efficiently. The resultant stabilized polymer through melt molding gives a molded article free from not only air inclusions or voids but also discoloration. The method is characterized by melt-kneading a melt-processable fluoropolymer having unstable groups in a kneader having a stabilization zone satisfying the following requirements: (1) an oxygen-containing gas is present in the stabilization zone and (2) water is present in that zone. Preferably, (3) the absolute pressure in the zone is regulated to 0.2 MPa or higher; or (a) an oxygen-containing gas is present in the zone in an amount sufficient to enable the stabilized fluoropolymer to have a carbon radical spin number of 5x1013 spins/g or smaller as determined by electron spin resonance (ESR) spectroscopy at a temperature of 77 K and (b) water is present in that zone.

公开(公告)号：EP1262496A4

公开(公告)日：2003-09-10

申请号：EP00976266

申请日：2000-11-16

申请人： DAIKIN IND LTD

发明人： MARUYA YOSHIKI ,  HIRAGA YOSHIYUKI ,  KOMATSU SATOSHI ,  OHTANI KATSUHIDE

IPC分类号： C08F214/26

CPC分类号： C08F214/262

摘要： A fluorocopolymer which comprises structural units derived from tetrafluoroethylene, hexafluoropropylene, and at least one perfluoro(alkyl vinyl ether) represented by the formula CF2=CFO(CF2)nCF3 (wherein n is a number of 0 to 3) in a ratio of (75-92)/(8-20)/(0-5) by weight and which has a melt flow rate (372 DEG C; load, 5,000 g) of 10 to 35 g/10 min and a die swell of 5 to 20%. The copolymer has excellent high-speed moldability. When used in high-speed extrusion molding for electric-wire coating, the copolymer can be applied to an electric wire without suffering or causing melt fracture or diameter fluctuation.

公开(公告)号：EP1043353A4

公开(公告)日：2001-12-12

申请号：EP98959162

申请日：1998-12-10

申请人： DAIKIN IND LTD

发明人： HIRAGA YOSHIYUKI ,  KOMATSU SATOSHI ,  NODA TOMOHISA ,  NAMIMATSU MASAYUKI

IPC分类号： C08J3/00 ,  C08F8/06 ,  C08J5/00 ,  C08L27/12

CPC分类号： C08J5/00 ,  C08F8/26 ,  C08J2327/12 ,  C08F214/26 ,  C08F214/28 ,  C08F8/06

摘要： A method for modifying a fluoropolymer, which comprises bringing the same into contact with ozone for the purpose of preventing the same from undergoing discoloration during melt molding or firing.