§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US5777038A Expired / Lapsed US ⏱️ 0.0 years remaining

High dielectric graft copolymer

Assignee: Sunstar Giken KK
•
Filing: 1995-11-15
•
Granted: 1998-07-07
•
Expires: 2015-11-15
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract This invention provides an organic dispersion-type electroluminescence (abbreviated as "EL") element comprising a backing electrode, a reflective insulating layer, a luminescent layer, and a transparent electrode, wherein said reflective insulating layer comprises a high dielectric binder resin, an inorganic high dielectric material (i.e. powdery barium titanate), an impurity ion killer, and/or a hydrophobic hydrocarbon group-containing alkoxysilane compound, which is effective for inhibiting or preventing undesirable deterioration of dielectric properties and shortening of durability induced by the impurity ions present in the powdery barium titanate, and further a high dielectric graft polymer composition which is useful as a high dielectric binder resin used in the preparation of the reflective insulating layer and luminescent layer in said EL element. Said dispersion-type EL element has usually used as a back-lighting, for example, in liquid crystal display (LCD) element in word processing machines or note-type personal computer.

Inventors

  • 👤 Satoshi Nishikawa
  • 👤 Mihoko Aoyama

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 04:41
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F259/00; C08F259/08

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 156 words
A high dielectric graft polymer which is prepared by graft-polymerizing a fluorine-containing polymer selected from the group consisting of vinylidene fluoride, hexafluoropropylene, chlorotrifluoroethylene, tetrafluoroethylene, pentafluoropropylene, and perfluoromethyl vinyl ether with a cyanoethylated (meth) acrylic monomer of the formula (II): ##STR3## wherein x is an integer of 2 to 4, y is a number satisfying the equation: 1≦y≦x-1, R 4 is H or CH 3 , and R 5 is a member selected from the group consisting of --CH 2 CH 2 --, --CH(CH 3 )CH 2- , --CH 2 CH(CH 3 )CH 2- , --CH 2 CH 2 CH(CH 3 )-, --CH 2 CH 2 CH 2 CH 2 CH 2 CH 2- , --CH 2 C(CH 3 ) 2 CH 2- , --CH 2 CH 2 OCH 2 CH 2- , --CH 2 CH(CH 3 )OCH 2 CH (CH 3 )--, --CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2- , ##STR4##
Claim 2
Dependent Claim 156 words
A high dielectric graft polymer which is prepared by graft-polymerizing a fluorine-containing polymer selected from the group consisting of vinylidene fluoride, hexafluoropropylene, chlorotrifluoroethylene, tetrafluoroethylene, pentafluoropropylene, and perfluoromethyl vinyl ether with a cyanoethylated (meth) acrylic monomer of the formula (II): ##STR3## wherein x is an integer of 2 to 4, y is a number satisfying the equation: 1≦y≦x-1, R 4 is H or CH 3 , and R 5 is a member selected from the group consisting of --CH 2 CH 2 --, --CH(CH 3 )CH 2- , --CH 2 CH(CH 3 )CH 2- , --CH 2 CH 2 CH(CH 3 )-, --CH 2 CH 2 CH 2 CH 2 CH 2 CH 2- , --CH 2 C(CH 3 ) 2 CH 2- , --CH 2 CH 2 OCH 2 CH 2- , --CH 2 CH(CH 3 )OCH 2 CH (CH 3 )--, --CH 2 CH 2 OCH 2 CH 2 OCH 2 CH 2- , ##STR4##
Claim 3
Dependent Claim 45 words
The high dielectric graft polymer according to claim 1, wherein the cyanoethylated (meth)acrylic monomer is used in an amount of 10 to 90% by weight based on the total weight of the cyanoethylated (meth) acrylic monomer and the homopolymer or copolymer of a fluorine-containing monomer.
Claim 4
Dependent Claim 50 words
The high dielectric graft polymer according to claim 1, wherein the homopolymer or copolymer of a fluorine-containing monomer is a polyvinylidene fluoride, or a copolymer of vinylidene fluoride with at least one of other fluorine-containing monomers selected from the group consisting of hexafluoropropylene, chlorotrifluoroethylene, tetrafluoroethylene, pentafluoropropylene, or perfluoromethyl vinyl ether.
Claim 5
Dependent Claim 29 words
The high dielectric graft polymer according to claim 3, wherein the polyvinylidene fluoride is used in a ratio of 50 to 85 mole % to the other fluorine-containing monomer.
Claim 6
Dependent Claim 24 words
The high dielectric graft polymer according to claim 1, wherein at least one copolymerizable monomer is used in addition to the cyanoethylated (meth)acrylic monomer.
Claim 7
Dependent Claim 35 words
The high dielectric graft polymer according to claim 5, wherein the copolymerizable monomer is used in an amount of 50 parts by weight or less to 100 parts by weight of the cyanoethylated (meth)acrylic monomer.

References Cited (Backward Citations)

FR2226414A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2001-07-06 2002-01-05 2002-07-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2005-07-06 2006-01-05 2006-07-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2009-07-06 2010-01-05 2010-07-07 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag