Polycarbonate
US-2021347939-A1 · Nov 11, 2021 · US
Method for the manufacture of polycarbonate
US12077635B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12077635-B2 |
| Application number | US-201917284270-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 12, 2019 |
| Priority date | Oct 11, 2018 |
| Publication date | Sep 3, 2024 |
| Grant date | Sep 3, 2024 |
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Abstract
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A method for the continuous multi-stage manufacture of an end-capped polycarbonate includes, i) preparing a monomer mixture in a monomer mixing stage by mixing a bisphenol, a diaryl carbonate and optionally a transesterification catalyst in at least one monomer mixing device, ii) preparing a carbonate oligomer in an oligomerisation stage by reacting the monomer mixture in at least one oligomerisation reactor, and iii) preparing the polycarbonate in a polymerisation stage by further reacting the carbonate oligomer of the oligomerisation stage in at least one polymerisation reactor, in which an end-capping agent different from phenol and having a single phenolic hydroxy group is added to the monomer mixture in the monomer mixing stage and/or to at least one oligomerisation reactor in the oligomerisation stage.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for the continuous multi-stage manufacture of an end- capped polycarbonate comprising, i) preparing a monomer mixture in a monomer mixing stage by mixing bisphenol A, diphenyl carbonate and a beta catalyst in at least one monomer mixing device, ii) preparing a carbonate oligomer in an oligomerization stage by reacting said monomer mixture in at least one oligomerization reactor, wherein an alpha catalyst is added to the first of said at le…
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- C08G64/307Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C08G64/14Primary
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US12077635B2 cover?
- A method for the continuous multi-stage manufacture of an end-capped polycarbonate includes, i) preparing a monomer mixture in a monomer mixing stage by mixing a bisphenol, a diaryl carbonate and optionally a transesterification catalyst in at least one monomer mixing device, ii) preparing a carbonate oligomer in an oligomerisation stage by reacting the monomer mixture in at least one oligomeri…
- Who is the assignee on this patent?
- Sabic Global Technologies Bv
- What technology area does this patent fall under?
- Primary CPC classification C08G64/307. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 03 2024 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).