ZA907797B - Yttrium and rare earth compounds catalyzed lactone polymerization - Google Patents

Yttrium and rare earth compounds catalyzed lactone polymerization

Info

Publication number
ZA907797B
ZA907797B ZA907797A ZA907797A ZA907797B ZA 907797 B ZA907797 B ZA 907797B ZA 907797 A ZA907797 A ZA 907797A ZA 907797 A ZA907797 A ZA 907797A ZA 907797 B ZA907797 B ZA 907797B
Authority
ZA
South Africa
Prior art keywords
yttrium
rare earth
earth compounds
polymerization
lactone polymerization
Prior art date
Application number
ZA907797A
Other languages
English (en)
Inventor
Stephan James Mclain
James Mclain Stephan
Neville Everton Drysdale
Everton Drysdale Neville
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
Publication of ZA907797B publication Critical patent/ZA907797B/xx

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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08—Lactones or lactides
    • 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
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78—Preparation processes
    • C08G63/82—Preparation processes characterised by the catalyst used
    • C08G63/823—Preparation processes characterised by the catalyst used for the preparation of polylactones or polylactides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
ZA907797A 1989-09-29 1990-09-28 Yttrium and rare earth compounds catalyzed lactone polymerization ZA907797B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/414,964 US5028667A (en) 1989-09-29 1989-09-29 Yttrium and rare earth compounds catalyzed lactone polymerization

Publications (1)

Publication Number Publication Date
ZA907797B true ZA907797B (en) 1992-05-27

Family

ID=23643768

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA907797A ZA907797B (en) 1989-09-29 1990-09-28 Yttrium and rare earth compounds catalyzed lactone polymerization

Country Status (20)

Country Link
US (1) US5028667A (xx)
EP (1) EP0493529B1 (xx)
JP (1) JP2858947B2 (xx)
CN (1) CN1051367A (xx)
AT (1) ATE124709T1 (xx)
AU (1) AU6624490A (xx)
BR (1) BR9007686A (xx)
CA (1) CA2066029A1 (xx)
DE (1) DE69020739T2 (xx)
FI (1) FI921351A (xx)
GR (1) GR900100721A (xx)
IE (1) IE903483A1 (xx)
IL (1) IL95804A0 (xx)
MX (1) MX22628A (xx)
NZ (1) NZ235503A (xx)
PL (1) PL287107A1 (xx)
PT (1) PT95470A (xx)
WO (1) WO1991005001A1 (xx)
YU (1) YU185290A (xx)
ZA (1) ZA907797B (xx)

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US5258488A (en) * 1992-01-24 1993-11-02 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247058A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US6005067A (en) * 1992-01-24 1999-12-21 Cargill Incorporated Continuous process for manufacture of lactide polymers with controlled optical purity
US5247059A (en) * 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US5235031A (en) * 1992-03-13 1993-08-10 E. I. Du Pont De Nemours And Company Polymerization of lactide
DE4218510A1 (de) * 1992-06-02 1993-12-09 Pharmatech Gmbh Verfahren zur Herstellung biologisch abbaubarer Polyester
US5541346A (en) * 1992-10-21 1996-07-30 E. I. Du Pont De Nemours And Company Polymerization of, and depolymerization to, cyclic ethers using selected metal compound catalysts
US5317064A (en) * 1992-12-11 1994-05-31 E. I. Du Pont De Nemours And Company Manufacture of polylactide stereocomplexes
US5420235A (en) * 1993-01-21 1995-05-30 E. I. Du Pont De Nemours And Company Continuous poly (hydroxy acid) polymerization using a counter-current impeller mixing system
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US5202413A (en) * 1993-02-16 1993-04-13 E. I. Du Pont De Nemours And Company Alternating (ABA)N polylactide block copolymers
US5342969A (en) * 1993-03-03 1994-08-30 E. I. Du Pont De Nemours And Company Recovery of hydroxycarboxylic acid values from poly(hydroxycarboxylic acids)
US5310599A (en) * 1993-05-06 1994-05-10 E. I. Du Pont De Nemours And Company Method for making polymers of alpha-hydroxy acids
FR2707653B1 (fr) * 1993-07-16 1995-09-15 Vetoquinol Sa Conjugué entre un polymère biocompatible et biodégradable et une molécule notamment une molécule biologiquement active, à hydrogène mobile, son procédé de préparation et composition pharmaceutique comprenant ce conjugué.
US5382617A (en) * 1993-08-20 1995-01-17 E. I. Du Pont De Nemours And Company Stabilization of poly(hydroxy acid)s derived from lactic or glycolic acid
US5374743A (en) * 1993-09-30 1994-12-20 E. I. Du Pont De Nemours And Company Process for the synthesis of lactide or glycolide from lactic acid or glycolide acid oligomers
US5489651A (en) * 1994-02-14 1996-02-06 The Regents Of The University Of California Polymerization using bimetallic bis-lanthanoid initiators
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CA2178662A1 (en) * 1995-07-06 1997-01-07 Chevron Chemical Company Polyoxyalkylene polylactone aminocarbamates and fuel compositions containing the same
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US5622532A (en) * 1996-06-20 1997-04-22 Chevron Chemical Company Polylactone aromatic esters and fuel compositions containing the same
US5618319A (en) * 1996-06-20 1997-04-08 Chevron Chemical Company Alkylamine polylactone aminocarbamates and fuel compositions containing the same
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EP1043066A1 (fr) * 1999-04-09 2000-10-11 Omnichem S.A. Compositions catalytiques à base d'yttrium et des métaux des terres rares pour la polymérisation de composés hétérocycliques oxygénés
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Also Published As

Publication number Publication date
AU6624490A (en) 1991-04-28
EP0493529B1 (en) 1995-07-05
US5028667B1 (xx) 1993-02-09
IL95804A0 (en) 1991-06-30
JPH05500982A (ja) 1993-02-25
EP0493529A1 (en) 1992-07-08
WO1991005001A1 (en) 1991-04-18
CA2066029A1 (en) 1991-03-30
US5028667A (en) 1991-07-02
PL287107A1 (en) 1992-03-23
BR9007686A (pt) 1992-08-18
MX22628A (es) 1993-11-01
DE69020739D1 (de) 1995-08-10
YU185290A (sh) 1992-09-07
CN1051367A (zh) 1991-05-15
JP2858947B2 (ja) 1999-02-17
PT95470A (pt) 1991-05-22
NZ235503A (en) 1993-03-26
ATE124709T1 (de) 1995-07-15
IE903483A1 (en) 1991-04-10
FI921351A0 (fi) 1992-03-27
GR900100721A (el) 1992-01-20
DE69020739T2 (de) 1995-11-23
FI921351A (fi) 1992-03-27

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