Xylylene diisocyanate composition, polymerizable composition, resin, molded article, optical element, and lens
US-2024263008-A1 · Aug 8, 2024 · US
Aromatic polythiol compound for optical material
US11279673B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11279673-B2 |
| Application number | US-201716317408-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 6, 2017 |
| Priority date | Jul 14, 2016 |
| Publication date | Mar 22, 2022 |
| Grant date | Mar 22, 2022 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity, as well as excellent mechanical properties such as low cure shrinkage; thus, they can be advantageously used for producing various plastic optical lenses such as eyeglass lenses and camera lenses.
First claim
Opening claim text (preview).
The invention claimed is: 1. An aromatic polythiol compound prepared by reacting a divinylbenzene compound represented by Formula 1 below and a bi- or higher-functional aliphatic polythiol, wherein the bi- or higher-functional aliphatic polythiol is at least one selected from the group consisting of ethoxylated trimethylolpropane tri(3-mercaptopropionate), tris[2-(3-mercaptopropionyloxy)ethyl]isocyanurate, dipentaerythritol hexa(3-mercaptopropionate), and 5,9-dimercaptomethyl-1,13-dimercapto-3,7,11-trithiatridecane, and wherein the molar ratio of the divinylbenzene compound to the bi- or higher-functional aliphatic polythiol is 1:2 to 1:10: 2. An aromatic polythiol compound prepared by reacting a divinylbenzene compound represented by Formula 1 below and a bi- or higher-functional aliphatic polythiol, wherein the aromatic polythiol compound has a number average molecular weight of 500 to 3,000, and wherein the bi- or higher-functional aliphatic polythiol is at least one selected from the group consisting of ethoxylated trimethylolpropane tri(3-mercaptopropionate), tris[2-(3-mercaptopropionyloxy)ethyl]isocyanurate, dipentaerythritol hexa(3-mercaptopropionate), and 5,9-dimercaptomethyl-1,13-dimercapto-3,7,11-trithiatridecane:
Assignees
Inventors
Classifications
containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring · CPC title
being toluene diisocyanate including isomer mixtures · CPC title
containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group · CPC title
- C08G18/3876Primary
containing mercapto groups · CPC title
organometallic compounds containing tin-carbon bonds · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11279673B2 cover?
- An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity,…
- Who is the assignee on this patent?
- Skc Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08G18/3876. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 22 2022 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).