Fluorine compounds
US-2017349760-A1 · Dec 7, 2017 · US
Process for producing pentaerythritol mercaptocarboxylic acid ester, polymerizable composition, resin, optical material, and lens
US10696627B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10696627-B2 |
| Application number | US-201615739425-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 24, 2016 |
| Priority date | Jun 24, 2015 |
| Publication date | Jun 30, 2020 |
| Grant date | Jun 30, 2020 |
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Abstract
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A process for producing a pentaerythritol mercaptocarboxylic acid ester of the present invention includes: a step of reacting pentaerythritol with a mercaptocarboxylic acid, in which an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.07 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing a pentaerythritol mercaptocarboxylic acid ester, the method comprising: a step of reacting pentaerythritol with a mercaptocarboxylic acid to obtain a pentaerythritol mercaptocarboxylic acid ester, wherein an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.003 or more and 0.07 or less, the content of bispentaerythritol in the pentaerythritol, with respect to the total weight of the pentaerythritol, is 1 wt % to 5 wt %, and the content of Na and Ca in the pentaerythritol, with respect to the total weight of the pentaerythritol, is less than 1 wt %. 2. The process for producing a pentaerythritol mercaptocarboxylic acid ester according to claim 1 , wherein the mercaptocarboxylic acid is a 3-mercaptopropionic acid or a thioglycolic acid. 3. A polymerizable composition comprising: the pentaerythritol mercaptocarboxylic acid ester obtained through the production method according to claim 1 ; and a polyiso(thio)cyanate compound. 4. A resin obtained by curing the polymerizable composition according to claim 3 . 5. An optical material composed of the resin according to claim 4 . 6. A lens composed of the resin according to claim 4 .
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Classifications
having heteroatoms other than oxygen (C08G18/32 takes precedence) · CPC title
made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title
containing mercapto groups · CPC title
the carbon skeleton being acyclic and saturated · CPC title
Lenses · CPC title
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- What does patent US10696627B2 cover?
- A process for producing a pentaerythritol mercaptocarboxylic acid ester of the present invention includes: a step of reacting pentaerythritol with a mercaptocarboxylic acid, in which an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.07 or less.
- Who is the assignee on this patent?
- Mitsui Chemicals Inc
- What technology area does this patent fall under?
- Primary CPC classification C07C319/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 30 2020 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).