Method for one-step synthesis of functional polyesters by organic catalysis

Patent metadata

Field	Value
Publication number	US-10040898-B2
Application number	US-201615365351-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Aug 31, 2016
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

It relates to the field of synthetic macromolecular chemistry, and discloses a method for one-step synthesis of thiol-functionalized polyester polyols by organic catalysis. This method uses lactone monomer as reaction raw material, thiol-alcohol as initiator, and diphenyl phosphate as organic catalyst to catalyze and synthesize the thiol-functionalized polyester polyols. The present invention provides a method which is simple, inexpensive, easily controllable and environmentally friendly to prepare thiol-functionalized polyester polyols with the easily available and controllable catalyst. The method can selectively catalyze the ring opening polymerization of lactone to prepare thiol-functionalized polyester polyols using the organic catalyst.

First claim

What is claimed is:

1. A method for the one-step synthesis of thiol-functionalized polyester polyols by organocatalysis, characterized in that, lactone monomer as reaction raw material, thiol-alcohol as initiator, and diphenyl phosphate as organic catalyst to prepare thiol-functionalized polyester polyols by catalytic reaction.

2. The method according to claim 1 , characterized in that, the thiol-functionalized polyester polyols have the following structure:

Wherein:
k 1 =1, 2;
k 2 =1, 2, 3, 5, 7, 8;
n=10˜200;
the lactone monomers are δ-valerolactone and/or ε-caprolactone;
the structural formula of thiol-alcohol is as follows:

wherein, k 2 =1, 2, 3, 5, 7, 8.

3. The method according to claim 2 , characterized in that, the reaction molar ratio of the lactone monomer, the thiol-alcohol and the diphenyl phosphate is (10˜100): 1: (0.1˜0.5).

4. The method according to claim 2 , characterized in that, the catalytic reaction is carried out in an organic solvent, such as toluene, benzene, chloroform and methylene chloride.

5. The method according to claim 2 , characterized in that, the concentration of lactone monomer is 0.5˜5 mol/L.

6. The method according to claim 2 , characterized in that, the reaction temperature is between 20 and 100° C.

7. The method according to claim 2 , characterized in that, the reaction time is 10˜600 min.

8. The method according to claim 2 , characterized in that, the reaction solution is quenched by adding triethylamine after the reaction process, and the reaction solution is added to methanol at −30 to 0° C. to precipitate into polymer separation, and then the polymer is separated by filtration to white solid and desiccated.

Assignees

• Nanjing University Of Technology

Inventors

• Guo Kai
• Liu Yihuan
• Zhu Ning
• Hu Xin
• Fang Zheng
• Feng Weiyang
• Huang Weijun

Classifications

• C08G63/823 Primary

  for the preparation of polylactones or polylactides · CPC title

• C08G63/87

  Non-metals or inter-compounds thereof (boron C08G63/84) · CPC title

• C08G63/6882 Primary

  derived from hydroxy carboxylic acids · CPC title

• C08G63/08

  Lactones or lactides · CPC title

• C08G63/90

  Purification; Drying · CPC title