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Composition for polyurethane foam

A technology of polyurethane foam and composition, which is applied in the direction of electrical recording technology using charge graphics, equipment and instruments using electrical recording technology using charge graphics, which can solve problems such as poor images and toner leakage, and achieve excellent recovery , Excellent toner sealing effect

Inactive Publication Date: 2018-08-31
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process cartridge method is used in many image forming apparatuses, leakage of toner results in defective images

Method used

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  • Composition for polyurethane foam
  • Composition for polyurethane foam
  • Composition for polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 20 and comparative example 1

[0133] The polyurethane foam raw materials shown in Table 1 were mixed and foamed at atmospheric pressure at 20° C. by a one-step method and a flat plate foaming method to produce 21 kinds of polyurethane foams. The obtained polyurethane foam was subjected to the above-mentioned evaluation. The results are shown in Table 1. The numerical values ​​in the rows of the formulations of the compositions in Table 1 are parts by mass except for the mass ratio.

[0134] Table 1

[0135]

[0136] Table 1 (continued)

[0137]

[0138] As is clear from Table 1, compared with the toner seal material produced from the polyurethane foam of Comparative Example 1, the toner seal materials produced from the polyurethane foams of Examples 1 to 20 were able to secure excellent properties of the polyurethane foam. Simultaneously with the toner sealability, the tensile strength of the polyurethane foam was shown to increase, and its compressive residual strain and hysteresis loss coefficie...

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Abstract

The present invention provides a composition for polyurethane foam, which is obtained by blending a polyol composed of a polyester polyol and a polyether polyol, tolylene diisocyanate, a foaming agentand a foam stabilizer, and which is characterized in that: the polyester polyol contains a phthalate ester polyol; and the mass composition ratio of the tolylene diisocyanate, namely (2, 4-tolylene diisocyanate) / (2, 6-tolylene diisocyanate) is from 65 / 35 to 70 / 30. This composition for polyurethane foam enables a polyurethane foam to have enhanced tensile strength and elastic recoverability, whileensuring low air permeability and excellent toner sealability.

Description

technical field [0001] The present invention relates to a composition for polyurethane foam, and particularly to a toner sealant obtained by foaming the composition for polyurethane foam to form a polyurethane foam. Background technique [0002] Urethane foam has soft mechanical properties and excellent processability, and thus is used as various sealing materials such as toner sealing materials and water-stop sealing materials. [0003] With recent advances in electrophotography, members including urethane foam have been used in image forming devices such as dry electrophotographic devices and the like as members for various purposes such as charging, developing, transferring, toner supply, and cleaning. received attention. Such members including polyurethane foam have been used as members for image forming apparatuses having elasticity, such as charging rollers, developing rollers, transfer rollers, toner supply rollers, and cleaning rollers. [0004] In image forming ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/00C08G18/42C08G18/48G03G15/00G03G15/08C08G101/00
CPCC08G18/76C08G18/00C08G18/42G03G15/00G03G15/08C08G18/6677C08G18/7621C08G18/4018C08G18/4213C08G2110/0083C08G2110/005C08G18/48C08G2190/00C08G2110/0008
Inventor 平田彩神崎慎也
Owner BRIDGESTONE CORP
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