ES478739A1 - Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado tetrahidrofurano-oxido de alquileno. - Google Patents

Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado tetrahidrofurano-oxido de alquileno.

Info

Publication number
ES478739A1
ES478739A1 ES478739A ES478739A ES478739A1 ES 478739 A1 ES478739 A1 ES 478739A1 ES 478739 A ES478739 A ES 478739A ES 478739 A ES478739 A ES 478739A ES 478739 A1 ES478739 A1 ES 478739A1
Authority
ES
Spain
Prior art keywords
polymerizate
cyclic ether
reducing
ether content
oligomeric cyclic
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
Application number
ES478739A
Other languages
English (en)
Spanish (es)
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of ES478739A1 publication Critical patent/ES478739A1/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
    • C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
    • C08G65/16—Cyclic ethers having four or more ring atoms
    • C08G65/20—Tetrahydrofuran
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/30—Post-polymerisation treatment, e.g. recovery, purification, drying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyethers (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
ES478739A 1978-03-16 1979-03-16 Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado tetrahidrofurano-oxido de alquileno. Expired ES478739A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88733278A 1978-03-16 1978-03-16
US05/962,311 US4202964A (en) 1978-03-16 1978-11-27 Method for reducing oligomeric cyclic ether content of a polymerizate

Publications (1)

Publication Number Publication Date
ES478739A1 true ES478739A1 (es) 1979-07-01

Family

ID=27128836

Family Applications (1)

Application Number Title Priority Date Filing Date
ES478739A Expired ES478739A1 (es) 1978-03-16 1979-03-16 Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado tetrahidrofurano-oxido de alquileno.

Country Status (7)

Country Link
US (1) US4202964A (enExample)
EP (1) EP0004536B1 (enExample)
JP (1) JPS54145795A (enExample)
CA (1) CA1121943A (enExample)
DE (1) DE2961382D1 (enExample)
ES (1) ES478739A1 (enExample)
PL (1) PL214145A1 (enExample)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306058A (en) * 1980-11-19 1981-12-15 E. I. Du Pont De Nemours And Company Method for reducing oligomeric cyclic ether content of a polymerizate
US4481123A (en) * 1981-05-06 1984-11-06 Bayer Aktiengesellschaft Polyethers, their preparation and their use as lubricants
JPS59189120A (ja) * 1983-04-13 1984-10-26 Daicel Chem Ind Ltd 新規なポリアルキレンエ−テルグリコ−ル共重合体
CA1216597A (en) * 1983-05-23 1987-01-13 Atsushi Aoshima Process for producing polyetherglycol
US4500705A (en) * 1984-01-09 1985-02-19 E. I. Du Pont De Nemours And Company Method for reducing oligomeric cyclic ether content of a polymerizate
US4658065A (en) * 1984-03-28 1987-04-14 Asahi Kasei Kogyo Kabushiki Kaisha Process for producing polyether polyol and a product
JPS61160654U (enExample) * 1985-03-26 1986-10-04
US4604210A (en) * 1985-04-25 1986-08-05 The Dow Chemical Company Method for removing cyclic phosphorus contaminants from organic substrates
US5118869A (en) * 1991-02-13 1992-06-02 E. I. Du Pont De Nemours And Company Polymerizing tetrahydrofuran to produce polytetramethylene ether glycol using a modified fluorinated resin catalyst containing sulfonic acid groups
ES2147343T3 (es) * 1993-07-16 2000-09-01 Du Pont Despolimerizacion de polieteres usando catalizadores heterogeneos.
US5344964A (en) * 1993-11-24 1994-09-06 Industrial Technology Research Institute Method for preparing ester end-capped polyalkylene ether
MX2011010776A (es) * 2009-04-15 2012-02-08 Invista Tech Sarl Proceso para la produccion de copolieter glicoles.
EP2419471B1 (en) * 2009-04-15 2014-09-24 Invista Technologies S.à.r.l. Improved copolyether glycol manufacturing process
US20130197143A1 (en) * 2009-12-11 2013-08-01 INVISTA North America S.à.r.l Elastomeric compositions
ES2449442T3 (es) 2009-12-11 2014-03-19 Invista Technologies S.À.R.L. Despolimerización de éteres cíclicos oligoméricos
US20150166497A1 (en) * 2012-06-25 2015-06-18 Invista North America S.A.R.L. Controlled partial depolymerization process for polytetramethylene ether glycol molecular weight distribution narrowing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB854958A (en) * 1957-03-14 1960-11-23 Bayer Ag Copolymerising mono-epoxides with tetrahydrofurane
US3359332A (en) * 1963-07-25 1967-12-19 Monsanto Co Preparation of polyoxytetra-methylene glycol
US3405105A (en) * 1965-11-12 1968-10-08 Phillips Petroleum Co Polymerization of tetrahydrofuran and derivatives thereof with organic sulfonic acids
US3425999A (en) * 1966-07-11 1969-02-04 Wyandotte Chemicals Corp Tetrahydrofuran-ethylene oxide polyether urethane-urea polymers
US3692569A (en) * 1970-02-12 1972-09-19 Du Pont Surface-activated fluorocarbon objects
US3925484A (en) * 1973-11-08 1975-12-09 Du Pont Process for making polytetramethylene ether glycol having a narrow molecular weight distribution
US4071492A (en) * 1976-04-07 1978-01-31 The Firestone Tire & Rubber Company Polyurethane-urea elastomers based on propylene oxide-tetrahydrofuran copolymers
US4127513A (en) * 1977-11-09 1978-11-28 E. I. Du Pont De Nemours And Company Method for preparing polyether glycols

Also Published As

Publication number Publication date
EP0004536A1 (en) 1979-10-17
DE2961382D1 (en) 1982-01-28
JPS54145795A (en) 1979-11-14
EP0004536B1 (en) 1981-11-25
JPS5725566B2 (enExample) 1982-05-31
US4202964A (en) 1980-05-13
CA1121943A (en) 1982-04-13
PL214145A1 (enExample) 1980-01-02

Similar Documents

Publication Publication Date Title
ES478739A1 (es) Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado tetrahidrofurano-oxido de alquileno.
ES481498A1 (es) Un metodo para reducir el contenido en eteres ciclicos oli- gomeros de un polimerizado de thf-oxido de alquileno.
ES8304174A1 (es) Un metodo para reducir el contenido en eteres ciclicos oligomeros de un polimerizado de tetrahidrofurano.
ES465222A1 (es) Documento con un portador de informacion.
JPS52130984A (en) Novel cholineoxydase and method of preparing the same
DE2964245D1 (en) Polyurethanes prepared with tetrahydrofuran-alkylene oxide polymerizates having low oligomeric cyclic ether content, processes for preparing the same, and articles and fibers of the polyurethanes
JPS5373067A (en) Polisher
ES478740A1 (es) Un metodo para la produccion de un polimerizado de tetrahi- drofurano y un oxido de alquileno.
JPS5552602A (en) Waveguide mount
JPS5484153A (en) Detecting method of clearance on static pressure guide face
JPS5321571A (en) Glass covered semiconductor device and its production
JPS5769762A (en) Sealing method of hybrid integrated circuit
JPS5793273A (en) Solar cell face of pointer indication watch
JPS5219197A (en) Method for the production of fine- powdered silica containing boron ox ide
ES462987A1 (es) Un procedimiento para la obtencion de 2-furil-(3,4-dimetil-2-piridil)-carbinol.
JPS52122799A (en) Vacuum vessel for fission device
JPS5210001A (en) Receiver of highlevel transmission control procedure
JPS5239094A (en) Operation control method used for a neuclear power generation plant
JPS52139773A (en) Production of microbial cells
JPS51114595A (en) Pressure control device for nuclear power station
JPS52127953A (en) Method for accelerating curing of liquid chloroprene polymers
JPS5228498A (en) Producing method for stannic oxide whiskers
JPS53126279A (en) Semiconductor device and production of the same
SU1072616A1 (ru) Способ регистрации нейтронов
JPS531559A (en) Liquid level controlling electrode

Legal Events

Date Code Title Description
MM4A Patent lapsed

Effective date: 19960506