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EP0462785A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Resin composition for toners

Assignee: Mitsubishi Chemical Corp
•
Filing: 1991-06-18
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Granted: —
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Expires: 2011-06-18
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Abstract

Abstract A resin composition for toners, composed essentially of a suspension polymerizate of: (a) 5 to 40 % by weight per total polymer of a polyester comprising at least one aromatic diol component an at least one aliphatic diol component, and having a weight average molecular weight of 3,000 to 30,000, an acid value of 0.5 to 10 mgKOH/g, and an OH value of 10 to 60 mgKOH/g; (b) 60 to 95 % by weight per total polymer of a vinyl monomer; and (c) 0.1 to 1.0 % by weight per total polymer of a divinyl monomer, wherein said suspension polvmerizate has a glass transition temperature of 40 to 70°C, an acid value of 0.1 to 10 mgKOH/g, and a softening temperature of 100 to 160°C.

Inventors

  • 👤 Hirokazu Ito
  • 👤 Masahiro Itoh
  • 👤 Keiji Yoshida
  • 👤 Syuji Takahiro
  • 👤 Motoshi Inagaki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 18:33
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08784; G03G9/08795; G03G9/08742; G03G9/08755; G03G9/08797

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 125 words
A resin composition for toners, composed essentially of a suspension polymerizate of: (a) 5 to 40 % by weight per total polymer of a polyester comprising at least one aromatic diol component an at least one aliphatic diol component, and having a weight average molecular weight of 3,000 to 30,000, an acid value of 0.5 to 10 mgKOH/g, and an OH value of 10 to 60 mgKOH/g; (b) 60 to 95 % by weight per total polymer of a vinyl monomer; and (c) 0.1 to 1.0 % by weight per total polymer of a divinyl monomer, wherein said suspension polymerizate has a glass transition temperature of 40 to 70°C, an acid value of 0.1 to 10 mgKOH/g, and a softening temperature of 100 to 160°C
Claim 2
Dependent Claim 34 words
The resin composition for toners as claimed in Claim 1, wherein the vinyl monomer (b) comprises 1 to 30 % by weight based on the weight of the polyester (a) of glycidyl methacrylate component.

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