Microcup compositions

Patent metadata

Field	Value
Publication number	US-2016279072-A1
Application number	US-201615176732-A
Country	US
Kind code	A1
Filing date	Jun 8, 2016
Priority date	Nov 27, 2012
Publication date	Sep 29, 2016
Grant date	—

Abstract

The present invention is directed to a composition for preparing the microcups and the toughness of the display panel formed from such a composition may be significantly improved. In some cases, the panel may have an elongation at break of more than 10% and it can be completely peeled off from the substrate layer on which it is formed, without causing any damage to the panel.

First claim

What is claimed is:

1 . A panel comprising a plurality of microcups filled with a functional fluid and sealed with a sealing layer, wherein the microcups are formed from a composition comprising at least one difunctional UV curable diacrylate or dimethacrylate material selected from the group consisting of diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, ethoxylated bisphenol A diacrylate, urethane diacrylate, ethoxylated bisphenol A dimethacrylate, and polyethylene glycol dimethacrylate, wherein the total amount of the at least one difunctional UV curable diacrylate or dimethacrylate material is about 50-99% by weight of the composition, and wherein the panel has a greater than 10% elongation at break.

2 . The panel of claim 1 , which has a greater than 20% elongation at break.

3 . The panel of claim 1 , wherein the functional fluid comprises a pharmaceutical composition.

4 . The panel of claim 3 , wherein the functional fluid comprises about 0.01 wt % to about 40 wt % of the pharmaceutical composition.

5 . The panel of claim 1 , further including an adhesive layer.

6 . The panel of claim 1 , wherein the difunctional UV curable diacrylate or dimethacrylate material has a molecular weight higher than about 200 Daltons.

7 . The panel of claim 1 , wherein the microcups are formed from ethoxylated bisphenol A diacrylate or urethane diacrylate.

8 . A panel comprising: (a) a plurality of microcups filled with a functional fluid and sealed with a sealing layer, and (b) a primer layer, wherein the microcups are formed from a composition comprising at least one difunctional UV curable diacrylate or dimethacrylate material selected from the group consisting of diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, ethoxylated bisphenol A diacrylate, urethane diacrylate, ethoxylated bisphenol A dimethacrylate, and polyethylene glycol dimethacrylate, wherein the total amount of the at least one difunctional UV curable diacrylate or dimethacrylate material is about 50-99% by weight of the total composition, and wherein the panel has a greater than 5% elongation at break.

9 . The panel of claim 8 , which has a greater than 15% elongation at break.

10 . The panel of claim 8 , wherein the functional fluid comprises a pharmaceutical composition.

11 . The panel of claim 10 , wherein the functional fluid comprises about 0.01 wt % to about 40 wt % of the pharmaceutical composition.

12 . The panel of claim 8 , further including an adhesive layer.

13 . The panel of claim 8 , wherein the difunctional UV curable diacrylate or dimethacrylate material has a molecular weight higher than about 200 Daltons.

14 . The panel of claim 8 , wherein the microcups are formed from ethoxylated bisphenol A diacrylate or urethane diacrylate.

Assignees

• E Ink California Llc

Inventors

• Li Yu
• Zang Hongmei

Classifications

• C09J133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• B32B2307/20

  having particular electrical or magnetic properties, e.g. piezoelectric · CPC title

• B29C39/02

  for making articles of definite length, i.e. discrete articles · CPC title

• B32B27/16

  specially treated, e.g. irradiated · CPC title

• G02F1/1681

  having two or more microcells partitioned by walls, e.g. of microcup type · CPC title