Process for production of oxymethylene copolymer
US-10138321-B2 · Nov 27, 2018 · US
Method for producing a polydioxolane
US2016145383A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016145383-A1 |
| Application number | US-201414903366-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 3, 2014 |
| Priority date | Jul 12, 2013 |
| Publication date | May 26, 2016 |
| Grant date | — |
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Abstract
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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
Opening claim text (preview).
1 . A method for producing a polydioxolane, the method comprising: polymerizing a 1,3-dioxolane compound represented by 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, wherein R1 to R6 are the same or different and each independently represents a hydrogen atom, an alkyl group, an aryl group, a hydroxyalkyl group, an alkyloxy group, or an aryloxy group. 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 compound. 3 . The method for producing a polydioxolane according to claim 1 , wherein R1 to R6 in the formula (1) is each a hydrogen atom. 4 . 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. 5 . 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 the all monomers.
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Classifications
- C08G2/06Primary
Catalysts (Catalysts in general B01J) · CPC title
- C08G65/16Primary
Cyclic ethers having four or more ring atoms · CPC title
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
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- What does patent US2016145383A1 cover?
- 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…
- Who is the assignee on this patent?
- Mitsubishi Gas Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C08G2/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 26 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).