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Catalyst for polylactone preparation

A technology of catalyst and polylactone, which is applied in the field of catalyst for preparing polylactone, and can solve the problems of inapplicability and difficult removal of metal residues, etc.

Inactive Publication Date: 2016-02-24
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as CN1814644, US5235031, US5357034, US4057537, etc. have reported that metal catalysts such as tin salts are used to catalyze ε-caprolactone and lactide to carry out ring-opening polymerization to prepare poly ε-caprolactone and polylactic acid. But the polymerization prepared by this type of method Biomaterials cannot be used in some specific fields such as biomedicine and microelectronics because it is extremely difficult to remove metal residues

Method used

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  • Catalyst for polylactone preparation
  • Catalyst for polylactone preparation
  • Catalyst for polylactone preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In a 1-liter glass bottle, add 300 grams of lactide and 2 grams of ethylene glycol, replace it with high-purity nitrogen three times, then add 0.05 grams of 1-(4-sulfonic acid) butyl-3-methyl under nitrogen protection Imidazole tetrafluoroborate, heated to 130-160 degrees and reacted for 12 hours, then cooled to room temperature, dissolved the product with 2000 ml of chloroform, precipitated with 5000 ml of ethanol to obtain 280 grams of polylactic acid, and the weight average molecular weight was 20,000 as determined by GPC. The molecular weight distribution 1.3.

Embodiment 2

[0023] In a 3-liter glass bottle, add 300 grams of lactide, replace it with high-purity nitrogen three times, add 1000 ml of tetrahydrofuran, 1.5 grams of 1-(3-sulfonic acid) propyl-3-methylimidazolium tetrafluoro Borate, heated to 80-100 degrees and reacted for 12 hours, then cooled to room temperature, precipitated with 5000 ml of ethanol to obtain 240 grams of polylactic acid, with a weight average molecular weight of 110,000 and a molecular weight distribution of 1.28 as determined by GPC.

Embodiment 3

[0025] In a 3-liter glass bottle, add 300 grams of trimethylene carbonate, replace it with high-purity nitrogen three times, then add 1000 ml of toluene and 15 grams of 1-(4-sulfonic acid) butyl-3-methylpyridine under nitrogen protection. The pyrazine tetrafluoroborate was heated to 80-100 degrees and reacted for 12 hours, then cooled to room temperature, and precipitated with 5000 milliliters of ethanol to obtain 260 grams of polytrimethylene carbonate. The weight average molecular weight was 150,000 as determined by GPC, and the molecular weight distribution was 1.32.

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Abstract

The invention discloses a catalyst for polylactone preparation. A raw material lactone monomer undergoes ring-opening polymerization under the action of a difunctional group ionic liquid catalyst to obtain polylactone, and the catalyst is 1-(4-sulfo)butyl-3-methylpyrazinyltetrafluoroborate or 1-(4-sulfo)butyl-3-methylimidazolyltetrafluoroborate. The catalyst can catalyze lactone ring-opening polymerization to obtain polylactic acid, polyglycolic acid, poly(trimethylene carbonate) or other degradable polymers.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a catalyst for preparing polylactone. Background technique [0002] Polylactone polymer materials such as polylactic acid, polyglycolic acid and polytrimethylene carbonate have good biodegradability and biocompatibility, and blending with other polymer materials can improve the degradability of the material. As a fully degradable and environmentally friendly material derived from renewable resource crops, it has attracted widespread attention and research from people all over the world. [0003] There have been a lot of researches on the preparation methods of polylactones, among which ring-opening polymerization with cyclic lactones is a method that has been studied more, and various catalysts have become a research hotspot. Such as CN1814644, US5235031, US5357034, US4057537, etc. have reported that metal catalysts such as tin salts are used to catalyze ε-caprolactone and lacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/84C08G64/30
Inventor 袁明龙李宏利袁明虎唐志道袁明伟蒋琳钏永明郭俊明彭金辉
Owner YUNNAN MINZU UNIV
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