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Method for producing conductive polyurethane molded body and conductive roll

A manufacturing method and conductivity technology, which is applied in the manufacture of conductive polyurethane moldings and the field of conductive rollers, can solve the problem that the conductivity of polyurethane foam is not necessarily high, and achieve the effect of high conductivity

Inactive Publication Date: 2009-11-25
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] However, even in this case, under the condition that Ketjen Black, which is conductive carbon, is blended in an amount of 3% by mass to 6% by mass based on the polyol, it is considered that the conductivity of the resulting polyurethane foam is not necessarily high.

Method used

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  • Method for producing conductive polyurethane molded body and conductive roll
  • Method for producing conductive polyurethane molded body and conductive roll
  • Method for producing conductive polyurethane molded body and conductive roll

Examples

Experimental program
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Embodiment

[0047] The present invention is further illustrated by enumerating the examples of manufacturing conductive polyurethane foam below. In addition, this invention is not limited to the Example demonstrated below.

[0048] (Synthesis of isocyanate-terminated prepolymer)

[0049] Into a 100-L capacity reactor equipped with a stirrer, a cooling pipe, a nitrogen gas introduction pipe, and a thermometer, the isocyanate component was charged, and reacted at 80° C. for 4 hours while stirring to obtain an isocyanate-terminated prepolymer.

[0050] At this time, 21.25 parts of 2,4'-MDI content of 99 mass % or more of MDI, 6.20 parts of FA-103 (nominal functional group number is 3, number average molecular weight is 3400, EO (ethylene oxide) content is 70% , manufactured by Sanyo Chemical Corporation), 9.59 parts of GL-600 (nominal number of functional groups is 3, number average molecular weight is 600, EO content is 20%, manufactured by Sanyo Chemical Corporation) and 5.75 parts of PL-...

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Abstract

Disclosed is a method for producing a conductive polyurethane molded body having both good conductivity and good moldability, or a conductive polyurethane molded body attaining high conductivity, while securing adequate moldability. Also disclosed is a conductive roll. A conductive polyurethane molded body is obtained by using an isocyanate containing not less than 60% by mass of 2,4'-diphenylmethane diisocyanate and a polyol as the main material to which at least a conductivity-imparting agent is blended, and reacting and molding the thus-obtained blend. A conductive polyurethane foam is obtained by adding a foaming agent to the blend andreacting the resulting. The conductive polyurethane foam can be suitably used for a conductive roll.

Description

technical field [0001] The present invention relates to a method for producing a conductive polyurethane molding and a conductive roller. Background technique [0002] For example, roller members used in OA equipment such as facsimile machines and copiers are used for electro-adsorption and conveyance of toner. Therefore, the roller member requires proper conductivity. In addition, the roller member also needs to have a relatively low hardness to the extent that it does not damage a mating member in contact therewith. [0003] As a material of such a roller member (hereinafter referred to as a conductive roller), polyurethane moldings (conductive polyurethane moldings) obtained by reacting isocyanate and polyol can be widely used. [0004] In this case, toluene diisocyanate (hereinafter referred to as TDI) may be used as the isocyanate. [0005] However, since TDI has low reactivity, productivity is low. In addition, since TDI has a high vapor pressure in the temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/02F16C13/00G03G15/08B29K75/00B29L31/32
CPCB29K2995/0005C08J2375/04G03G15/0818G03G15/0233G03G15/1685G03G15/0808G03G21/0058C08J9/0066C08J9/0052
Inventor 大森直之山田卓
Owner NIPPON POLYURETHANE IND CO LTD