New route to oligocarbonate diols suitable for the synthesis of polyurethane elastomers

Kuran, Witold; Sobczak, Marcin; Listoś, Tomasz; Dębek, C.; Florjańczyk, Zbigniew

doi:10.1016/s0032-3861(00)00197-x

Cited by 58 publications

(40 citation statements)

References 9 publications

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“…Generally, they are prepared by the reaction of diols with phosgene or phosgene derivatives [1], ring-opening polymerization of six-membered cyclic carbonates [2], transesterification of dimethyl-or diethylcarbonate as well as alkylene carbonate with diols [3][4][5][6][7][8]. Copolymerization of CO 2 and propylene oxide(PO) to afford polycarbonate was first pioneered by Inoue in 1969 using ZnEt 2 /H 2 O as catalyst [9,10], this transformation has been studied extensively in the past four decades [11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Selective synthesis of oligo(carbonate-ether) diols from copolymerization of CO2 and propylene oxide under zinc-cobalt double metal cyanide complex

et al. 2012

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Colorless oligo(carbonate-ether) diols were selectively synthesized in high efficiency from copolymerization of CO 2 and propylene oxide (PO) using Zn 3 [Co(CN) 6 ] 2 -based double metal cyanide complex (DMC) as catalyst and different molecular weight polypropylene glycols (PPGs) as chain transfer agent. The catalytic activity was related to carbonate unit content and molecular weight of target oligo(carbonate-ether) diols, for oligo(carbonate-ether) diol with number average molecular weight of 6.4 kg/mol and carbonate unit content of 34.3 %, it reached 10.0 kg oligomer/g DMC catalyst during 10 h of copolymerization. Generally, the number average molecular weight of the oligo(carbonateether) diol was tunable between 1.8 kg/mol and 6.4 kg/mol, and the molecular weight distribution was controllable between 1.14 and 1.83. Moreover, the carbonate unit content in the oligo-diols can be adjusted between 15.3 % and 62.5 %, lower temperature and higher CO 2 pressure were favorable for higher carbonate content. Better selectivity of oligo(carbonateether)diol over propylene carbonate(PC) was realized, where the weight ratio of PC (W PC ) was controlled less than 8.0 wt%. We also found that the alkali metal ion residue may play an important role in PC formation, in some cases this effect may be more significant than backbiting process, removing the residual alkali metal ion should be meaningful in the future to further reduce the PC formation.

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Section: Introductionmentioning

confidence: 99%

Selective synthesis of oligo(carbonate-ether) diols from copolymerization of CO2 and propylene oxide under zinc-cobalt double metal cyanide complex

et al. 2012

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“…The polyurethanes obtained show better hydrolytic stability, mechanical properties and anti-oxidation ability than the conventional ones base on polyether or polyester diols [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

KF/Al2O3 as Solid Base for the Synthesis of Polycarbonate Diols (PCDLs)

Feng

Ning

et al. 2007

Catal Lett

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Polycarbonate diols (PCDLs) are known as important intermediate for the manufacture of novel polyurethanes. In this work, a series of KF loaded oxides and alumina doped with potassium halides were prepared and employed as the catalysts for the PCDL synthesis via the reaction of hextane-1, 6-diols (HD) and dimethyl carbonate (DMC) followed by vacuum oligomerization. Experimental results indicated that among the catalysts tested, KF/Al 2 O 3 exhibited the best catalytic activity. Moreover, the catalyst could be reused for three times with acceptable catalytic activity. The basic centres with medium and strong strength generated through the interaction between KF and Al 2 O 3 were catalytically active for the reaction.

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“…Polymer viscosity was measured in N,N- [29]. The hydroxyl number of the obtained polyesters was determined according to a known method, based on the reaction with acetic acetate [18,19].…”

Section: Measurementsmentioning

confidence: 99%

Use of aliphatic poly(amide urethane)s for the controlled release of 5-fluorouracil

Sobczak

Hajdaniak

Goś

et al. 2011

European Journal of Medicinal Chemistry

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New route to oligocarbonate diols suitable for the synthesis of polyurethane elastomers

Cited by 58 publications

References 9 publications

Selective synthesis of oligo(carbonate-ether) diols from copolymerization of CO2 and propylene oxide under zinc-cobalt double metal cyanide complex

Selective synthesis of oligo(carbonate-ether) diols from copolymerization of CO2 and propylene oxide under zinc-cobalt double metal cyanide complex

KF/Al2O3 as Solid Base for the Synthesis of Polycarbonate Diols (PCDLs)

Use of aliphatic poly(amide urethane)s for the controlled release of 5-fluorouracil

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