§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0469752A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Binder for dry toner

Assignee: Mitsui Chemicals Inc
•
Filing: 1991-07-18
•
Granted: —
•
Expires: 2011-07-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Herein disclosed is a binder for dry toners which comprises a copolymer resin obtained by reacting 10 to 50% by weight of a polyester resin which has free carboxyl groups, whose acid value ranges from 10 to 100 and whose number-average molecular weight ranges from 1,000 to 5,000 and 90 to 50% by weight of a mixture of a vinyl compound having a glycidyl group and the an another vinyl compound, wherein the amount of the vinyl compound having a glycidyl group corresponds to the number of the glycidyl groups equal to 0.25 to 1.5 time that of the carboxyl groups present in the polyester resin. The binder for dry toners is used in the electrophotography technique.

Inventors

  • 👤 Tateo Otsuki
  • 👤 Nobuhiro Hirayama
  • 👤 Kazuya Tsukamoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 07:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08755; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105; Y10S430/166

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 101 words
A binder for dry toners comprising a copolymer resin obtained by reacting 10 to 50% by weight of a polyester resin which has free carboxyl groups, whose acid value ranges from 10 to 100 and whose number-average molecular weight ranges from 1,000 to 5,000 and 90 to 50% by weight of a mixture of a vinyl compound having a glycidyl group and an another vinyl compound, wherein the amount of the vinyl compound having a glycidyl group corresponds to the number of the glycidyl groups equal to 0.25 to 1.5 time that of the carboxyl groups present in the polyester resin.
Claim 2
Dependent Claim 101 words
A binder for dry toners comprising a copolymer resin obtained by reacting 10 to 50% by weight of a polyester resin which has free carboxyl groups, whose acid value ranges from 10 to 100 and whose number-average molecular weight ranges from 1,000 to 5,000 and 90 to 50% by weight of a mixture of a vinyl compound having a glycidyl group and an another vinyl compound, wherein the amount of the vinyl compound having a glycidyl group corresponds to the number of the glycidyl groups equal to 0.25 to 1.5 time that of the carboxyl groups present in the polyester resin.
Claim 3
Dependent Claim 24 words
The binder for dry toners as set forth in claim 1 wherein the acid value of the polyester resin ranges from 15 to 80.
Claim 4
Dependent Claim 36 words
The binder for dry toners as set forth in claim 1 wherein the vinyl compound having a glycidyl group is a member selected from the group consisting of allyl glycidyl ether, glycidyl acrylate and glycidyl methacrylate.
Claim 5
Dependent Claim 50 words
The binder for dry toners as set forth in claim 1 wherein the amount of the vinyl compound having a glycidyl group is used in an amount corresponding to the number of glycidyl groups equal to 0.5 to 1.0 time that of the carboxyl groups present in the polyester resin.
Claim 6
Dependent Claim 27 words
The binder for dry toners as set forth in claim 1 wherein the glass transition point of the copolymer resin ranges from 50 to 70 C .

References Cited (Backward Citations)

EP0254543A2 Cited
WO1990010893A1 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag