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Rubber composition for roller and ionic conductive rubber roller using the composition

A technology of rubber composition and ion conductivity, applied in coating, printing, printing devices, etc., can solve problems such as difficulty in using rubber rollers

Inactive Publication Date: 2005-02-02
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the obtained ion-conductive rubber roller has problems such as stickiness (tackiness) on the rubber surface and unreacted polymer oil bleeding from the rubber surface, so it is very difficult to use it as a rubber roller.

Method used

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  • Rubber composition for roller and ionic conductive rubber roller using the composition
  • Rubber composition for roller and ionic conductive rubber roller using the composition
  • Rubber composition for roller and ionic conductive rubber roller using the composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-

[0091] 100 parts by weight of polyoxypropylene (number average molecular weight: about 7,200), 20 parts by weight of the following formula (3)

[0092]

[0093] phenyl group-containing polysiloxane (phenyl group content ratio: 40 mol %) whose both ends are blocked by vinyldimethylsiloxy groups, 10.5 parts by weight of the following formula (4)

[0094]

[0095] A phenyl-containing methylhydrogenated diene siloxane (molar ratio of SiH / alkenyl: 1.5 mol / mol) with a viscosity of about 20 mPa·s at 25° C., 0.6 parts by weight of 1- Ethynyl-1-cyclohexanol was mixed. Then, with respect to component (A), 100 ppm (by weight) of platinum vinylsiloxane complex as a platinum metal component was added to the mixture obtained above, and mixed well until uniform. Next, 2 parts by weight of LiN(CF 3 SO 2 ) 2 , 15 parts by weight of titanium oxide particles as a heat resistance enhancer, fully mixed, and prepared to obtain a liquid rubber composition 1.

Embodiment 2-

[0097] In Example 1, except that the mixing amount of the phenyl group-containing polysiloxane (phenyl group content ratio: 40 mol%) represented by the above (3) was changed to Other than 50 parts by weight, the liquid rubber composition 2 was prepared in the same manner.

Embodiment 3-

[0099] 100 parts by weight of polyoxypropylene (number average molecular weight: about 7,200), 20 parts by weight of the following formula (5)

[0100]

[0101] The viscosity at 25°C represented by 6.5 parts by weight of the phenyl-containing polysiloxane (phenyl group content ratio: 10 mol%) blocked by vinyldimethylsiloxy groups at both ends is about 20 mPa·s phenyl-containing methylhydrogenated diene polysiloxane (SiH / alkenyl molar ratio: 1.2 mol / mol), 0.6 parts by weight of 1-ethynyl-1-cyclohexyl as a reaction control agent Alcohol is mixed. Then, relative to component (A), 100 mm (by weight) of platinum vinyl siloxane complex as a platinum metal component was added to the mixture obtained above, and mixed thoroughly until uniform. Next, 0.6 parts by weight of LiN(CF 3 SO 2 ) 2 , 15 parts by weight of titanium oxide particles as a heat resistance enhancer, fully mixed, and prepared to obtain a liquid rubber composition 3.

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Abstract

The invention provides an addition-curable rubber composition suitable for manufacturing a rubber for a roll that is free of the tackiness of the rubber surface and oil bleeding and used for electrophotographic image forming apparatuses and the like. The addition-curable rubber composition for the roll contains (A) a polyoxyalkylene having at least two alkenyl groups in the molecule, (B) an organopolysiloxane having at least two alkenyl groups and containing 10-50 mol% of phenyl groups bonded to silicon atoms based on the total organic groups bonded to the silicon atoms, (C) an organohydrogenpolysiloxane having in the molecule at least two hydrogen atoms bonded to silicon atoms, (D) a platinum catalyst, and (E) an ion conductivity imparting agent.

Description

technical field [0001] The present invention relates to an addition-curable rubber composition for a roller used in an electrophotographic image forming apparatus, and an ion-conductive rubber roller. Background technique [0002] JP7-300564A describes adding a compound that imparts conductivity to an addition-curable rubber composition containing polyoxyalkylene as a main component and curing by a hydrosilylation reaction, and using the obtained composition to manufacture Ionically Conductive Rubber Roller Method. According to this method, an ion-conductive rubber roller is manufactured by curing the composition around the periphery of the roller and forming an ion-conductive rubber layer. [0003] However, the resulting ion-conductive rubber roller has problems such as stickiness (tackiness) on the rubber surface and oil bleeding of unreacted polymer from the rubber surface, so it is very difficult to use as a rubber roller. Contents of the invention [0004] An object...

Claims

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Application Information

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IPC IPC(8): F16C13/00B41J13/02C08K3/00C08L63/08C08L83/05C08L83/07C08L83/12
CPCC08K2003/0831C08L71/02C08L83/04C08L2201/00C08L2205/03C09D171/02
Inventor 首藤重挥
Owner SHIN ETSU CHEM IND CO LTD
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