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Preparation method of polylactic copolymer polyol

A technology of polylactic acid copolymer and polyol, which is applied in the field of preparation of polylactic acid copolymer polyol, can solve the problems of cytotoxicity, limited application, trace residue, etc., and achieve the effect of good biodegradability and simple steps

Inactive Publication Date: 2017-06-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, trace residues and cytotoxicity of metal catalysts in PLA polyols limit their applications in packaging, biomedicine, and microelectronics

Method used

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Examples

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preparation example Construction

[0028] An aspect of the embodiment of the present invention provides a kind of preparation method of polylactic acid copolymer polyol, it comprises:

[0029] The organic compound is used as a catalyst, and the polyol compound is used as a chain transfer agent to catalyze the copolymerization reaction of lactide and cyclic lactone to obtain polylactic acid copolymer polyol.

[0030] In some embodiments, the catalyst includes 4-dimethylaminopyridine, 1,5,7-triazidebicyclo(4.4.0)dec-5-ene, 1,8-diazabicycloundecane Any one or a combination of two or more of -7-ene, 7-methyl-1,5,7-triazidebicyclo(4.4.0)dec-5-ene, phosphazene, and thiourea, but not limited to this.

[0031] In some embodiments, the lactide includes any one or a combination of two or more of L-lactide, D-lactide, and DL-lactide, but is not limited thereto.

[0032] Preferably, the cyclic lactone includes any one or a combination of two or more of butyrolactone, caprolactone, and cyclic carbonate, but is not limited...

Embodiment 1

[0049]Add 4.8g of 1,4-butanediol, 80g of lactide, 20g of caprolactone, 0.05g of 1,8-diazabicycloundec-7-ene into a 500mL round bottom beaker, and place the round bottom Evacuate the beaker and replace it with nitrogen for 3 times, stir and heat up to 120°C under nitrogen protection, then react at 120°C for 4 hours, the monomer conversion rate is 98%, and the catalytic activity of the catalyst is 2.05kg / g. Lactic acid copolymer diol has a molecular weight of 1950 and a molecular weight distribution of 1.5.

Embodiment 2

[0051] Add 70g of 1,4-cyclohexanedimethanol, 160g of lactide, 40g of butyrolactone, 0.1g of 1,5,7-triazidebicyclo(4.4.0)dec-5-ene in a 500mL round bottom beaker, Evacuate the round bottom beaker and replace it with nitrogen for 3 times, stir and heat up to 140°C under the protection of nitrogen, then react at 140°C for 3 hours, the monomer conversion rate is 96%, and the catalytic activity of the catalyst is 1.3kg / g , to obtain polylactic acid copolymer diol, its molecular weight is 547, and molecular weight distribution is 1.25.

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Abstract

The invention discloses a preparation method of polylactic copolymer polyol. The preparation method comprises steps as follows: with an organic compound as a catalyst and a polyol compound as a chain transfer agent, lactide and cyclic lactone are catalyzed to be subjected to a copolymerization reaction, and polylactic copolymer polyol is obtained. The adopted organic compound catalyst has the characteristics of being non-toxic and efficient, the catalytic activity is higher than 1 kg / g, no toxic byproducts are generated in the reaction process, steps are simple and easy to implement, and the preparation method is environment-friendly; the molecular weight of the obtained polylactic copolymer polyol is 500 g / mol-10,000 g / mol, the molecular weight distribution is 1.1-2, the biodegradability is good, and the obtained polylactic copolymer polyol can meet the application requirements and used for synthesis of biodegradable materials.

Description

technical field [0001] The invention relates to a preparation method of polylactic acid copolymer polyol. Background technique [0002] Polyester polyol is an important raw material for the synthesis of polyurethane, which is usually obtained by polycondensation of petroleum-based diols and dibasic acids. With the increasing consumption of petroleum resources, the use of bio-based raw materials to prepare polyester polyols has attracted widespread attention in academia and industry. Bio-based polylactic acid (PLA) is a kind of polymer material chemically synthesized from fermented lactic acid such as starch. It has the characteristics of complete biodegradation, good biocompatibility, and regeneration. Completely decomposed, finally decomposed into CO 2 And water, can realize ecological balance cycle. Shi Shuo et al. used organotin metal catalysts to catalyze lactide polymerization under chain transfer agents, and obtained linear and star PLA polyols (Polymer Materials Sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/78C08G63/87
CPCC08G63/08C08G63/78C08G63/823C08G63/87
Inventor 余海斌顾林李辉郑艳
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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