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Binder resin composition of toner, toner composition and preparation method thereof

A technology of binder resin and composition, applied in the direction of developer, instrument, electrography, etc.

Inactive Publication Date: 2008-04-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, this toner still leaves many unresolved problems associated with the high reactivity of epoxy novolac resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] A nearly linear polyester (Mw / Mn = 1.8 and Mn = 6,000) was prepared. The polyester had an acid value of 6 mgKOH / g. polymer and a hydroxyl value of 8 mgKOH / g. polymer. To obtain the acid number, the polyester was titrated with KOH, the acetic anhydride was dissociated with the OH groups, and the acetic acid was back-titrated with KOH. The glass transition temperature of the polyester is 60.5°C, and the melting point (1 / 2 outflow temperature of the flow tester) of the polyester is 101°C. The melting point was measured under the conditions of a temperature increase rate of 3° C. / min, a load of 20 kg, and a test die of 1 mmΦ10 mmt.

[0093] Then 1 g of polyester was mixed with 0.3 g of polyvinyl alcohol (average molecular weight=3000) as a proton donor, and the mixture was subjected to a melt-kneading process to produce a hydrogen-bonded polymer composite. Although the glass transition temperature of the composite showed little change, an increase in the melting point was...

Embodiment 2

[0099] A polyester (Mw / Mn = 1.5 and Mn = 4,000) was prepared. The polyester had an acid value of 40 mgKOH / g.polymer and a hydroxyl value of 20 mgKOH / g.polymer. To obtain the acid number, the polyester was titrated with KOH, the acetic anhydride was dissociated with the OH groups, and the acetic acid was back-titrated with KOH. The glass transition temperature of the polyester is 57.5°C, and the melting point (1 / 2 outflow temperature of the flow tester) of the polyester is 88°C. The melting point was measured under the conditions of a heating rate of 3° C. / min, a load of 20 kg, and a test mold of 1 mmΦ10 mmt.

[0100] Then 1 g of polyester was mixed with 0.8 g of polyvinyl alcohol (average molecular weight=3000) as a proton donor, and the mixture was subjected to a melt-kneading process to produce a hydrogen bonded polymer composite. Although the glass transition temperature of the composite showed little change, an increase in the melting point was observed (melting point = ...

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Abstract

A binder resin composition which can sharply, but reversibly, melt and solidify within a narrow temperature range, a toner composition of enhanced low-temperature fixability and durability having the binder resin composition, and a preparation method thereof. The binder resin composition of the toner includes a first polymer compound having a proton donor site in a main chain, and a second polymer compound having a proton acceptor site in a main chain.

Description

technical field [0001] The present invention relates to a binder composition for toner, a toner composition, and a method for preparing the same, and more particularly, to a binder that can be melted and solidified sharply, but reversibly, within a narrow temperature range A binder resin composition, a toner composition having enhanced low-temperature fixability and durability comprising the binder resin composition, and a method for producing the same. Background technique [0002] Toner compositions are used in various applications, particularly in image forming devices to form images. The toner of the toner composition is generally classified into dry toner and wet toner. Dry toners are not only simple to prepare, but also easy to store and use afterwards. Wet toners are toners that contain a liquid carrier and provide sharper image quality. But preparation methods are very complicated compared to dry toners, wet toners are difficult to preserve, and they must be handl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G9/087G03G9/08
CPCG03G9/08797G03G9/0874G03G9/08762G03G9/0802G03G9/08759G03G9/08795G03G9/08726G03G9/08791G03G9/08755G03G9/08764G03G9/08722C08L33/00C08L29/04C08L33/10
Inventor 常见宏一
Owner SAMSUNG ELECTRONICS CO LTD
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