Polishing pad compound
US-9458280-B2 · Oct 4, 2016 · US
Polymerizable composition for optical material, optical material and method for producing optical material
US9505872B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9505872-B2 |
| Application number | US-86379009-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 6, 2009 |
| Priority date | Feb 7, 2008 |
| Publication date | Nov 29, 2016 |
| Grant date | Nov 29, 2016 |
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Abstract
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A polymerizable composition for an optical material containing tolylene diisocyanate, hexamethylene diisocyanate, and one or more polythiol compounds selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 4,8-, 4,7- or 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, pentaerythritol tetrakismercaptoacetate, pentaerythritol tetrakismercaptopropionate, 2,5-bis(mercaptomethyl)-1,4-dithiane, bis(mercaptoethyl)sulfide, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane and 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithietane.
First claim
Opening claim text (preview).
The invention claimed is: 1. A polymerizable composition for an optical material comprising tolylene diisocyanate, hexamethylene diisocyanate, and one or more polythiol compounds selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 4,8-, 4,7- or 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane and 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithietane, wherein the amount of tolylene diisocyanate is 35.9 wt % to 70.7 wt % and the amount of hexamethylene diisocyanate is 29.3 wt % to 64.1 wt % based on the total amount of isocyanate compounds in the composition. 2. The polymerizable composition for an optical material as set forth in claim 1 , wherein the polythiol compound is 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane. 3. A method for producing an optical material, the method comprising the step of curing the polymerizable composition for an optical material as set forth in claim 1 . 4. The method for producing an optical material as set forth in claim 3 , in which said optical material is formed by cast polymerization of said polymerizable composition. 5. An optical material obtained by curing the polymerizable composition for an optical material as set forth in claim 1 .
Assignees
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Classifications
acyclic · CPC title
- C08G18/724Primary
Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates · CPC title
being toluene diisocyanate including isomer mixtures · CPC title
Lenses · CPC title
- C08G18/3876Primary
containing mercapto groups · CPC title
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- What does patent US9505872B2 cover?
- A polymerizable composition for an optical material containing tolylene diisocyanate, hexamethylene diisocyanate, and one or more polythiol compounds selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 4,8-, 4,7- or 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, pentaerythritol tetrakismercaptoacetate, pentaerythritol tetrakismercaptopropionate, …
- Who is the assignee on this patent?
- Ryu Akinori, Kobayashi Seiichi, Mitsui Chemicals Inc
- What technology area does this patent fall under?
- Primary CPC classification C08G18/724. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 29 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).