Sulfonium salt, chemically amplified resist composition, and pattern forming process
US-9221742-B2 · Dec 29, 2015 · US
Bifunctional compound having norbornane skeleton and method for producing same
US10513485B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10513485-B2 |
| Application number | US-201916373669-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 3, 2019 |
| Priority date | Mar 28, 2014 |
| Publication date | Dec 24, 2019 |
| Grant date | Dec 24, 2019 |
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Abstract
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A process for producing a polycarbonate resin by reacting raw materials of a bifunctional compound and diphenyl carbonate, where the bifunctional compound is an isomer mixture of: a 2,6-derivative of a bifunctional compound of formula (3-a): and a 2,7-derivative of a bifunctional compound of formula (3-b): where R 2 in formulae (3-a) and (3-b) is, independently, H, CH 3 or C 2 H 5 , and where the mixing ratio between the 2,6-derivative and the 2,7-derivative is 30:70 to 70:30.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing a polycarbonate resin, comprising reacting raw materials consisting of a bifunctional compound and diphenyl carbonate, wherein the bifunctional compound is an isomer mixture of: a 2,6-derivative of a bifunctional compound of formula (3-a): wherein R 2 is H, CH 3 or C 2 H 5 ; and a 2,7-derivative of a bifunctional compound of formula (3-b): wherein R 2 is H, CH 3 or C 2 H 5 , and wherein the mixing ratio between the 2,6-derivative and the 2,7-derivative is 30:70 to 70:30. 2. The process as claimed in claim 1 , wherein R 2 in formula (3-a) and R 2 in in formula (3-b) represents H. 3. The process as claimed in claim 1 , wherein R 2 in formula (3-a) and R 2 in in formula (3-b) represents CH 3 . 4. The process as claimed in claim 1 , wherein R 2 in formula (3-a) and R 2 in in formula (3-b) represents C 2 H 5 .
Assignees
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Classifications
saturated · CPC title
having a —CHO group on a condensed ring system · CPC title
containing four rings · CPC title
by oxo-reactions · CPC title
Polycyclic with condensed rings · CPC title
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- What does patent US10513485B2 cover?
- A process for producing a polycarbonate resin by reacting raw materials of a bifunctional compound and diphenyl carbonate, where the bifunctional compound is an isomer mixture of: a 2,6-derivative of a bifunctional compound of formula (3-a): and …
- Who is the assignee on this patent?
- Mitsubishi Gas Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C07C69/757. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 24 2019 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).