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US 9,868,819 B2Granted
Method for producing a polydioxolane
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsAkira Ito, Hiroyuki Teramoto
Life of this patent
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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.
Claims6
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.
Dependencies are inferred from the claim text.