Photocurable composition and optical material
US-2018265638-A1 · Sep 20, 2018 · US
Composition for optical material
US12552902B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12552902-B2 |
| Application number | US-202117925362-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2021 |
| Priority date | May 27, 2020 |
| Publication date | Feb 17, 2026 |
| Grant date | Feb 17, 2026 |
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- Title
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Abstract
Official abstract text for this publication.
A composition for an optical material contains (a) an episulfide compound, (b) a polymerization catalyst, and (c) an ester compound having a halogen at the α position. The (c) ester compound having a halogen at the α position is preferably at least one compound selected from the group consisting of dimethyl chloromalonate, diethyl chloromalonate, dimethyl bromomalonate, and diethyl bromomalonate.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A composition for optical materials containing an episulfide compound (a), a polymerization catalyst (b), and an ester compound having a halogen at α position (c), wherein the ester compound having a halogen at α position (c) is a compound represented by formula (10): wherein: X represents a halogen; and R 1 and R 2 each independently represents a hydrocarbon having 1 to 10 carbon atoms. 2 . The composition for optical materials according to claim 1 , wherein the episulfide compound (a) is a compound represented by formula (1): wherein: m represents an integer of 0 to 4; and n represents an integer of 0 to 2. 3 . The composition for optical materials according to claim 1 , which further comprises a polythiol compound. 4 . The composition for optical materials according to claim 1 , which further comprises sulfur and/or a compound represented by formula (9): wherein: X represents S, Se or Te; a to f=0 to 3; 8≥(a+c+e)≥1; 8≥(b+d+f)≥2; and (b+d+f)≥(a+c+e). 5 . The composition for optical materials according to claim 1 , wherein the compound represented by formula (10) is at least one compound selected from the group consisting of dimethyl chloromalonate, diethyl chloromalonate, dimethyl bromomalonate and diethyl bromomalonate. 6 . An optical material obtained by polymerizing the composition for optical materials according to claim 1 . 7 . The composition for optical materials according to claim 4 , which comprises sulfur.
Assignees
Inventors
Classifications
Ophthalmic lenses having special refractive features achieved by special materials or material structures (G02C7/049 takes precedence) · CPC title
made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title
containing one or more sulfur atoms as the only heteroatom, e.g. thiophene · CPC title
containing halogens · CPC title
Lenses · CPC title
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- What does patent US12552902B2 cover?
- A composition for an optical material contains (a) an episulfide compound, (b) a polymerization catalyst, and (c) an ester compound having a halogen at the α position. The (c) ester compound having a halogen at the α position is preferably at least one compound selected from the group consisting of dimethyl chloromalonate, diethyl chloromalonate, dimethyl bromomalonate, and diethyl bromomalonate.
- Who is the assignee on this patent?
- Mitsubishi Gas Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C08G75/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 17 2026 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).