Copolycarbonate and composition containing the same
US-2016376405-A1 · Dec 29, 2016 · US
Polycarbonate manufacturing method and polycarbonate
US9447235B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9447235-B2 |
| Application number | US-201514883759-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 15, 2015 |
| Priority date | Apr 16, 2013 |
| Publication date | Sep 20, 2016 |
| Grant date | Sep 20, 2016 |
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Abstract
Official abstract text for this publication.
The present invention relates to a method of producing polycarbonate containing following step (a) and step (b), (a) a step of reacting a specific fluorine-containing carbonate (Compound (1), etc.) and an aromatic dihydroxy compound in the presence of a condensation catalyst, to obtain a prepolymer, and (b) a step of heating the prepolymer at a temperature which is lower than a melting temperature of the prepolymer and performing solid phase polymerization on the prepolymer while a fluorine-containing alcohol that is produced as a by-product is discharged out of a system, to obtain a polycarbonate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of producing polycarbonate comprising following step (a) and step (b): (a) a step of reacting at least one kind of fluorine-containing carbonate selected from the group consisting of a compound represented by Formula (1), a compound represented by Formula (2), a compound represented by Formula (3), and a compound represented by Formula (4), and an aromatic dihydroxy compound in the presence of a condensation catalyst, to obtain a prepolymer; a…
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- C08G64/28Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9447235B2 cover?
- The present invention relates to a method of producing polycarbonate containing following step (a) and step (b), (a) a step of reacting a specific fluorine-containing carbonate (Compound (1), etc.) and an aromatic dihydroxy compound in the presence of a condensation catalyst, to obtain a prepolymer, and (b) a step of heating the prepolymer at a temperature which is lower than a melting temperat…
- Who is the assignee on this patent?
- Asahi Glass Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08G64/28. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 20 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).