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Method for preparing a polyester

A technology of polyester and cyclic ester, applied in the field of preparing polyester homopolymer or polyester copolymer

Inactive Publication Date: 2016-01-20
SAUDI BASIC IND CORP SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While the relative rates of polymerization were found to be 2500 and 330 for the six-membered (β-valerolactone) and seven-membered (ε-caprolactone) lactones, respectively, the reaction rate for the 12-17-membered lactones was only about 1

Method used

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  • Method for preparing a polyester
  • Method for preparing a polyester

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Experimental program
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Embodiment

[0103] All solvents and reagents were purchased from commercial sources unless otherwise indicated. Para-xylene (99.9%) was dried over sodium and fractionated under nitrogen and degassed before use. Cetyl alcohol, pentadecanolactone, ε-decalactone, muscinolactone, ε-caprolactone and β-butyrolactone were obtained from CaH under nitrogen before use. 2 Freshly distilled. Toluene was passed through a cleanup column and degassed before use.

[0104] 1 HNMR and 13 CNMR spectra were obtained at room temperature in CDCl 3 , using 400MHz and 100.62MHz frequencies (respectively for 1 H and 13C) Run VarianMercuryVx spectrometer to record. for 1 For HNMR experiments, the spectral width is 6402.0 Hz, the acquisition time is 1.998 s and the number of recorded scans is equal to 64. 13 CNMR spectra were recorded with a spectral width of 24154.6 Hz, an acquisition time of 1.300 s and 256 scans. Chemical shifts are reported in ppm relative to tetramethylsilane (TMS) and determined wit...

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Abstract

The invention is directed to a method for preparing a polyester comprising providing a first cyclic ester having a ring size of from 12 - 40 atoms and subjecting the first cyclic ester to ring-opening polymerisation by contacting the first cyclic ester with a catalyst of formula I.

Description

Background of the invention [0001] The present invention relates to a process for the preparation of polyester homopolymers or polyester copolymers. [0002] Polyesters are interesting materials due to their properties, which include, for example, biocompatibility, biodegradability and drug permeability. Additionally when used in film applications they exhibit preferred barrier properties, especially oxygen barrier properties. Polyesters are therefore of great interest in medical and food packaging applications. For these purposes, materials with engineered structures are desired, implying the need for a high level of control over the polymerization reaction. Additionally, with the right properties, certain polyesters form interesting biodegradable options for polyethylene in different applications. [0003] Traditional polyester synthesis strategies using, for example, polycondensation create fundamental problems that can make the controlled synthesis of these materials a ...

Claims

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Application Information

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IPC IPC(8): C08G63/00C08K5/56
CPCC08G63/08C08G63/83C08G63/84C08L67/04
Inventor M·布亚依R·迪沙托L·亚辛斯卡-沃尔克
Owner SAUDI BASIC IND CORP SA
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