IT1025516B - Processo per la produzione di po litetrametilenetereglicolavente una ristratta distribuzione deipesi molecolari - Google Patents

Processo per la produzione di po litetrametilenetereglicolavente una ristratta distribuzione deipesi molecolari

Info

Publication number
IT1025516B
IT1025516B IT29211/74A IT2921174A IT1025516B IT 1025516 B IT1025516 B IT 1025516B IT 29211/74 A IT29211/74 A IT 29211/74A IT 2921174 A IT2921174 A IT 2921174A IT 1025516 B IT1025516 B IT 1025516B
Authority
IT
Italy
Prior art keywords
litetramethyleneetereglicol
production
molecular weights
restricted distribution
restricted
Prior art date
Application number
IT29211/74A
Other languages
English (en)
Original Assignee
Du Pont
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 Du Pont filed Critical Du Pont
Application granted granted Critical
Publication of IT1025516B publication Critical patent/IT1025516B/it

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
    • C08G65/30—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)
  • Polyethers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Polyurethanes Or Polyureas (AREA)
IT29211/74A 1973-11-08 1974-11-07 Processo per la produzione di po litetrametilenetereglicolavente una ristratta distribuzione deipesi molecolari IT1025516B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US414129A US3925484A (en) 1973-11-08 1973-11-08 Process for making polytetramethylene ether glycol having a narrow molecular weight distribution

Publications (1)

Publication Number Publication Date
IT1025516B true IT1025516B (it) 1978-08-30

Family

ID=23640073

Family Applications (1)

Application Number Title Priority Date Filing Date
IT29211/74A IT1025516B (it) 1973-11-08 1974-11-07 Processo per la produzione di po litetrametilenetereglicolavente una ristratta distribuzione deipesi molecolari

Country Status (7)

Country Link
US (1) US3925484A (it)
JP (1) JPS5747687B2 (it)
CA (1) CA1038408A (it)
DE (1) DE2453114C2 (it)
FR (1) FR2250786B1 (it)
GB (1) GB1453753A (it)
IT (1) IT1025516B (it)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115408A (en) * 1977-08-05 1978-09-19 E.I. Dupont De Nemours And Company Conversion of poly(tetramethylene ether) glycol in aqueous effluent stream to tetrahydrofuran
US4192943A (en) * 1978-06-13 1980-03-11 E. I. Du Pont De Nemours And Company Method for reducing oligomeric cyclic ether content of a polymerizate
US4202964A (en) * 1978-03-16 1980-05-13 E. I. Du Pont De Nemours And Company Method for reducing oligomeric cyclic ether content of a polymerizate
DE3042960A1 (de) * 1980-11-14 1982-07-08 Basf Ag, 6700 Ludwigshafen Verfahren zur depolymerisation von polytetramethylenglykolether
JPS60149623A (ja) * 1984-01-13 1985-08-07 Toyobo Co Ltd ポリウレタン弾性体成形品の製造方法
DE3505152A1 (de) * 1985-02-15 1986-09-04 Basf Ag, 6700 Ludwigshafen Verfahren zur einengung der molekulargewichtsverteilung von polytetrahydrofuran
DE3607946A1 (de) * 1986-03-11 1987-09-17 Basf Ag Verfahren zur einengung der molekulargewichtsverteilung von polytetrahydrofuran und von copolymerisaten aus tetrahydrofuran und alkylenoxiden
JPH0794547B2 (ja) * 1986-04-10 1995-10-11 三菱化学株式会社 ポリテトラメチレンエーテルグリコールの改質法
US4954658A (en) * 1988-05-19 1990-09-04 E. I. Du Pont De Nemours And Company Process for reducing fluoride levels in poly(tetramethylene ether) glycol
US4988797B1 (en) * 1989-03-14 1993-12-28 Cationic polymerization of cyclic ethers
DE4205984C1 (en) * 1992-02-27 1993-05-06 Bruno Prof. Dr. 7822 St Blasien De Vollmert Mfg. poly:tetra:hydro:furan or poly:tetra:methylene glycol - by cationic polymerisation of THF in presence of initiator for narrow mol. wt. distribution
US5180857A (en) * 1992-03-10 1993-01-19 E. I. Du Pont De Nemours And Company Reduction of molecular weight of poly(tetramethylene ether) glycol
US5635585A (en) * 1992-10-21 1997-06-03 E. I. Du Pont De Nemours And Company Polymerization of, and depolymerization to, cyclic ethers using selected metal compound catalysts
US5434315A (en) * 1994-02-22 1995-07-18 E. I. Du Pont De Nemours And Company Reducing molecular weight polydispersity of polyether glycols by membrane fractionation
US6355846B1 (en) 2000-10-17 2002-03-12 E. I. Du Pont De Nemours And Company Narrowing of poly (tetramethylene ether) glycol
JP4800568B2 (ja) * 2002-12-20 2011-10-26 保土谷化学工業株式会社 分子量分布の狭められたポリエーテルポリオールの製造方法
WO2010060957A1 (de) * 2008-11-27 2010-06-03 Basf Se Vorrichtung zur destillativen auftrennung
US8372946B2 (en) * 2009-04-15 2013-02-12 Invista North America S.A R.L. Copolyether glycol manufacturing process
KR20120102072A (ko) 2009-12-11 2012-09-17 인비스타 테크놀러지스 에스.에이.알.엘. 올리고머 시클릭 에테르의 해중합
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
EP3222648B1 (en) * 2014-11-20 2020-01-01 Mitsubishi Chemical Corporation Polytetramethylene ether glycol, method for producing it, polyester elastomer and polyurethane
KR102492665B1 (ko) 2017-09-29 2023-01-26 에스케이케미칼 주식회사 폴리트리메틸렌 에테르 글리콜 및 이의 제조 방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751419A (en) * 1954-09-13 1956-06-19 Du Pont Process for purification of polytetramethyleneether
US3359332A (en) * 1963-07-25 1967-12-19 Monsanto Co Preparation of polyoxytetra-methylene glycol
US3358042A (en) * 1963-09-20 1967-12-12 Quaker Oats Co Process for recovering polytetramethylene ether glycol
US3467679A (en) * 1966-03-21 1969-09-16 Du Pont Production of tetrahydrofuran from 1,4-butanediol
US3478109A (en) * 1967-07-28 1969-11-11 Eastman Kodak Co Solvent extraction of polymeric glycols using methanol
US3461169A (en) * 1967-07-28 1969-08-12 Eastman Kodak Co Solvent extraction of polymeric glycols using acetonitrile

Also Published As

Publication number Publication date
GB1453753A (en) 1976-10-27
DE2453114A1 (de) 1975-05-15
US3925484A (en) 1975-12-09
CA1038408A (en) 1978-09-12
JPS5075697A (it) 1975-06-20
FR2250786B1 (it) 1980-11-07
DE2453114C2 (de) 1983-05-26
USB414129I5 (it) 1975-01-28
FR2250786A1 (it) 1975-06-06
JPS5747687B2 (it) 1982-10-12

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