Method for producing a polydioxolane

Patent metadata

Field	Value
Publication number	US-9868819-B2
Application number	US-201414903366-A
Country	US
Kind code	B2
Filing date	Jul 3, 2014
Priority date	Jul 12, 2013
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

The present invention provides a method for producing a polydioxolane, which includes polymerizing a 1,3-dioxolane compound represented by the formula (1) in the presence of a cationic catalyst and a sterically hindered phenol in an amount of 10 to 1,500 ppm, based on the 1,3-dioxolane compound. In the formula (1), R1 to R6 are the same or difference and each independently represents a hydrogen atom, an alkyl group, an aryl group, a hydroxyalkyl group, an alkyloxy group, or an aryloxy group.

First claim

The invention claimed is:

1. A method for producing a polydioxolane, the method comprising:
polymerizing 1,3-dioxolane in the presence of a cationic catalyst and a sterically hindered phenol in an amount of 80 to 800 ppm, based on the 1,3-dioxolane, wherein the 1,3-dioxolane is present in the range of 83% to 100% by mass based upon total mass of all monomers; and wherein the sterically hindered phenol is selected from the group consisting of triethylene glycol-bis-3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionate, pentaerythrityl-tetrakis-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, and dibutylhydroxytoluene.

2. The method for producing a polydioxolane according to claim 1 , wherein the sterically hindered phenol is present in an amount of 200 to 800 ppm, based on the 1,3-dioxolane.

3. The method for producing a polydioxolane according to claim 1 , wherein the sterically hindered phenol is triethylene glycol-bis-3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionate.

4. The method for producing a polydioxolane according to claim 1 , wherein the cationic catalyst is at least one selected from the group consisting of a heteropolyacid, an isopolyacid, a perfluoroalkylsulfonic acid, and a derivatives thereof, and wherein the cationic catalyst is present in an amount of 10 to 1,000 ppm, based on the total mass of all monomers.

5. The method for producing a polydioxolane according to claim 1 , wherein the monomers include at least one monomer selected from the group consisting of trioxane, tetraoxocane, ethylene oxide, propylene oxide, butylene oxide, epichlorohydrin, styrene oxide, oxirane, oxetane, tetrahydrofuran and oxepane.

6. The method for producing a polydioxolane according to claim 1 , wherein the 1,3-dioxolane is reacted in the absence of other monomers.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Ito Akira
• Teramoto Hiroyuki

Classifications

• C08G65/16 Primary

  Cyclic ethers having four or more ring atoms · CPC title

• C08G4/00

  Condensation polymers of aldehydes or ketones with polyalcohols; Addition polymers of heterocyclic oxygen compounds containing in the ring at least once the grouping —O—C—O— (of cyclic oligomers of aldehydes C08G2/00) · CPC title

• C08G2/06 Primary

  Catalysts (Catalysts in general B01J) · CPC title