Wavelength conversion member, backlight unit including wavelength conversion member, liquid crystal display device, and method of manufacturing wavelength conversion member
US-2017321116-A1 · Nov 9, 2017 · US
Quantum dot article with thiol-epoxy matrix
US10519366B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10519366-B2 |
| Application number | US-201615560597-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 23, 2016 |
| Priority date | Apr 16, 2015 |
| Publication date | Dec 31, 2019 |
| Grant date | Dec 31, 2019 |
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Abstract
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Described is a quantum dot film article comprising a quantum dot of a cured thiol-epoxy matrix. The matrix formulations resist ingress from water and/or oxygen, while also providing acceptable color stability upon aging.
First claim
Opening claim text (preview).
What is claimed is: 1. A composition comprising quantum dots dispersed in a thiol-epoxy resin matrix comprising a (meth)acrylate component; wherein the thiol-epoxy resin is derived from at least one polythiol, and at least one polyepoxy resin, each has a functionality ≥2, and the stoichiometric molar ratio of thiol groups of the polythiol to the epoxy groups of the polyepoxy resin is from 0.75:1 to 1:0.75; wherein the (meth)acrylate component comprises up to 25 wt. % of the thiol-epoxy resin matrix, and the sum of the molar equivalent of the (meth)acrylate groups of the (meth)acrylate component plus the molar equivalent of the epoxy groups of the polyepoxy resin, is equal to the molar equivalent of the thiol groups of the polythiol+/−20%; wherein the thiol-epoxy resin matrix consists essentially of a cured reaction product of the polythiol with the polyepoxy resin and the (meth)acrylate component; wherein the quantum dots are core-shelled quantum dots selected from CdSe/CdS, CdSe/ZnS, CdTe/ZnS, PbSe/PbS, PbSe/ZnS and InP/ZnS; and wherein the quantum dots dispersed in the thiol-epoxy resin matrix achieve an external quantum efficiency (EQE) of greater than 85%. 2. The composition of claim 1 wherein the polythiol is of the formula: R 2 (SH) y , where R 2 is (hetero)hydrocarbyl group having a valence of y, and y is ≥2. 3. The composition of claim 1 wherein said polythiol is obtained by esterification of a polyol with a terminally thiol-substituted carboxylic acid. 4. The composition of claim 1 wherein the polyepoxy resin is a glycidyl ether of the formula: wherein R 20 is a (hetero)hydrocarbyl radical and m is 2 to 6. 5. The composition of claim 1 wherein the quantum dots are core-shelled quantum dots stabilized by organic ligands. 6. The composition of claim 5 wherein the quantum dots are selected from CdSe/ZnS and InP/ZnS. 7. The composition of claim 1 , wherein the weight ratio of quantum dots in thiol-epoxy matrix is 0.1% to 20%.
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Classifications
Multiple coating on one surface · CPC title
Metals · CPC title
containing phosphorus · CPC title
Optical elements · CPC title
Water vapor barrier · CPC title
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Frequently asked questions
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- What does patent US10519366B2 cover?
- Described is a quantum dot film article comprising a quantum dot of a cured thiol-epoxy matrix. The matrix formulations resist ingress from water and/or oxygen, while also providing acceptable color stability upon aging.
- Who is the assignee on this patent?
- 3M Innovative Properties Co
- What technology area does this patent fall under?
- Primary CPC classification C08L63/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 31 2019 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).