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

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/06Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
    • C08G63/08Lactones or lactides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/78Preparation processes
    • C08G63/82Preparation processes characterised by the catalyst used
    • C08G63/823Preparation 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)
  • Medicinal Preparation (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Manufacture Of Macromolecular Shaped Articles (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 (fr)
EP (1) EP0493529B1 (fr)
JP (1) JP2858947B2 (fr)
CN (1) CN1051367A (fr)
AT (1) ATE124709T1 (fr)
AU (1) AU6624490A (fr)
BR (1) BR9007686A (fr)
CA (1) CA2066029A1 (fr)
DE (1) DE69020739T2 (fr)
FI (1) FI921351A0 (fr)
GR (1) GR900100721A (fr)
IE (1) IE903483A1 (fr)
IL (1) IL95804A0 (fr)
MX (1) MX22628A (fr)
NZ (1) NZ235503A (fr)
PL (1) PL287107A1 (fr)
PT (1) PT95470A (fr)
WO (1) WO1991005001A1 (fr)
YU (1) YU185290A (fr)
ZA (1) ZA907797B (fr)

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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
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US6469133B2 (en) * 1999-12-13 2002-10-22 Board Of Trustees Of Michigan State University Process for the preparation of polymers of dimeric cyclic esters
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Also Published As

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

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