# US 11,078,363 B2 · Optical material composition

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- Number: US 11,078,363 B2
- Document ID: US11078363B2
- Status: Granted
- Kind: B2
- Application number: 16/483,219
- Filed: 2018-02-06
- Published: 2020-07-09
- Granted: 2021-08-03
- Earliest claimed: 2017-02-17
- Assignees: Mitsubishi Gas Chemical Company, Inc.
- Applicants: Mitsubishi Gas Chemical Company, Inc.
- Inventors: Yoshihiko Nishimori; Yosuke Imagawa; Kouhei Takemura; Hiroshi Horikoshi; Yoshiaki Yamamoto
- Web page: https://patentgrep.com/patent/US11078363B2

## CPC

- C08L 81/02: Polythioethers; Polythioether-ethers
- A62D 3/00: Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances (consuming noxious gases by combustion F23G7/06)
- C07D 331/02: Three-membered rings
- C08G 75/08: from thiiranes
- C08K 3/06: Sulfur
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- G02B 1/041: {Lenses}
- C08L 2201/10: Transparent films; Clear coatings; Transparent materials
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- A62D: CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

Provided an optical material composition which makes it possible to design an optical material exhibiting a broad range of properties. This optical material composition contains a compound (A) represented by formula (1) and a polythiol (a), and does not contain 1,2,3,5,6-pentathiepane (b).

## Claims

### Claim 1

An optical material composition, which comprises a compound (A) represented by the following formula (1) and a polythiol (a), and does not comprise 1,2,3,5,6-pentathiepane (b)
wherein the content of the compound (A) is 20% to 80% by mass relative to the total mass of the composition.

### Claim 2 (depends on 1)

The composition according to claim 1, which further comprises sulfur.

### Claim 3 (depends on 1)

The composition according to claim 1, which further comprises a compound (B) represented by the following formula (2):
(wherein m represents an integer of 0 to 4, and n represents an integer of 0 to 2).

### Claim 4 (depends on 3)

The composition according to claim 3, wherein the content of the compound (B) is 0% to 70% by mass relative to the total mass of the composition.

### Claim 5 (depends on 1)

The composition according to claim 1, wherein the polythiol (a) is at least one selected from 1,2,6,7-tetramercapto-4-thiaheptane, methanedithiol, (sulfanylmethyldisulfanyl)methanethiol, bis(2-mercaptoethyl)sulfide, 2,5-bis(mercaptomethyl)-1,4-dithiane, 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, tetramercaptopentaerythritol, 1,3-bis(mercaptomethyl)benzene, 1,4-bis(mercaptomethyl)benzene, and thiiranemethanethiol.

### Claim 6 (depends on 3)

The composition according to claim 3, which comprises:
the compound (B)
0% to 70% by mass;
the polythiol (a)
0.1% to 20% by mass; and
sulfur
0% to 25% by mass
relative to the total mass of the composition.

### Claim 7 (depends on 1)

An optical material cured from the composition according to claim 1.

### Claim 8 (depends on 7)

An optical lens comprising the optical material according to claim 7.