US5635259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition for sealing film-made liquid crystal cells
Assignee: Mitsui Chemicals Inc
•
Filing: 1995-06-07
•
Granted: 1997-06-03
•
Expires: 2015-06-07
Abstract
Abstract A resin composition for sealing liquid crystal cells comprising as principal ingredients epoxy resin containing a polysulfide modified epoxy resin, hydrazide compounds and fillers. The said epoxy resin contains a polysulfide modified epoxy resin expressed by the general formula (1) in an amount of 20 to 100% by weight in the entire epoxy resin and the average molecular weight of the entire epoxy resin is between 300 and 3000. Formula (1) is defined as follows: <IMAGE> (1) where each of R1 and R3 represents at least one organic group selected from a group consisting of bisphenol structures, aliphatic oxyether structures and aliphatic thioether structures and R2 represents a polysulfide structure expressed by -(C2H4OCH2OC2H4Sm)n-, wherein m represents the number of sulfur atoms contained in a polysulfide structure, which is 1 or 2, and n represents the average number of polysulfide structures contained in the above formula, which is between 1 and 50. A film-made liquid crystal cell made by using the resin composition is excellent in adhesion, flexibility, electric properties and has high reliability.
Inventors
- 👤 Syuji Tahara
- 👤 Koichi Machida
- 👤 Seiji Itami
- 👤 Masayuki Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/302; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4035; C08G59/68; C08G59/686; C08L; C08L63/00; C08L63/10; C09; C09J; C09J151/00; C09J151/08; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; C09K; C09K2323/00; C09K2323/05; C09K2323/055; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A liquid crystal cell prepared by applying a resin composition for sealing liquid crystal cells to a cell substrate made of a plastic film, said resin composition comprising an epoxy resin containing a polysulfide modified epoxy resin, a hydrazide compound and filler, wherein the epoxy resin contains said polysulfide modified epoxy resin in an amount of 20 to 100% by weight and said polysulfide modified epoxy resin is expressed by general formula (1): ##STR5## wherein each of R 1 and R 3 represents at least one organic group selected from the group consisting of bisphenol structures, aliphatic oxyether structures and aliphatic thioester structures and R 2 represents a polysulfide structure expressed by --(C 2 H 4 OCH 2 OC 2 H 4 S m ) n --, where m represents the number of sulfur atoms contained in a polysulfide structure and is 1 or 2, and n represents the average number of polysulfide structures contained in the above formula and is 1 to 50, precuring the resin composition and thereafter hot-curing the resin composition to bond the substrate.
Claim 2
Dependent Claim
178 words
A liquid crystal cell prepared by applying a resin composition for sealing liquid crystal cells to a cell substrate made of a plastic film, said resin composition comprising an epoxy resin containing a polysulfide modified epoxy resin, a hydrazide compound and filler, wherein the epoxy resin contains said polysulfide modified epoxy resin in an amount of 20 to 100% by weight and said polysulfide modified epoxy resin is expressed by general formula (1): ##STR5## wherein each of R 1 and R 3 represents at least one organic group selected from the group consisting of bisphenol structures, aliphatic oxyether structures and aliphatic thioester structures and R 2 represents a polysulfide structure expressed by --(C 2 H 4 OCH 2 OC 2 H 4 S m ) n --, where m represents the number of sulfur atoms contained in a polysulfide structure and is 1 or 2, and n represents the average number of polysulfide structures contained in the above formula and is 1 to 50, precuring the resin composition and thereafter hot-curing the resin composition to bond the substrate.
Claim 3
Dependent Claim
20 words
The liquid crystal cell of claim 1 wherein the epoxy resin contains rubber which is graft-copolymerized with the epoxy resin.
Claim 4
Dependent Claim
40 words
The liquid crystal cell of claim 2 wherein fine particles of an acrylester rubber, a silicone rubber, a conjugated diene rubber or a mixture thereof having a particle size of 0.01 to 5 μm are dispersed in the epoxy resin.
Claim 5
Dependent Claim
21 words
The liquid crystal cell of claim 2 wherein the rubber is present in an amount of 2 to 30% by weight.
Claim 6
Dependent Claim
21 words
The liquid crystal cell of claim 3 wherein the rubber is present in an amount of 2 to 30% by weight.
Claim 7
Dependent Claim
20 words
The liquid crystal cell of claim 1 wherein the composition further comprises a cure accelerator that is a urea compound.
Claim 8
Dependent Claim
18 words
The liquid crystal cell of claim 6 wherein the cure accelerator is expressed by general formula (3): ##STR6##
Claim 9
Dependent Claim
22 words
The liquid crystal cell of claim 7 wherein the urea compound is present in an amount of 0.2 to 5% by weight.
References Cited (Backward Citations)
US3856933A
Cited
JPS5516053A
Cited
JPS5521432A
Cited
EP0013875A1
Cited
JPS5723669A
Cited
US4362903A
Cited
US4524181A
Cited
JPS6069634A
Cited
JPS6072957A
Cited
US4692500A
Cited
US4788233A
Cited
US4816546A
Cited
JPH01129232A
Cited
US5150239A
Cited
JPH03170523A
Cited
US5318851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |