CN100412718C - Transfer medium carrying member, intermediate transfer member and image forming apparatus using the same - Google Patents

Abstract

The present invention relates to a transfer medium carrying member that excels in flame retardancy and provides good electrophotographical images. The transfer medium carrying member includes i) a resin and ii) a conductive filler, wherein the resin comprises a polycarbonate resin (a) that has a structural unit including a siloxane structure and a structural unit including a fluorene structure.

Description

Its image processing system of transfer medium carrying member, intermediate transfer member and use

Technical field

The present invention relates to transfer medium carrying member (transfer medium carryingmember) or intermediate transfer member (intermediate transfer member) and image processing system, particularly with adopt toner image (toner image) on the image-carrier of formation such as electrofax mode or electrostatic recording mode be transferred on the transfer materials the transfer medium carrying member or with the intermediate transfer member of the toner image transfer printing on the image-carrier and image processing system with this transfer medium carrying member or intermediate transfer member.As this image processing system, comprise black and white, monochrome or panchromatic electrophotographic copier, printer, other various logging machines etc.

Background technology

In the past, the transfer medium carrying member that uses when being transferred to the image on the image-carrier on the transfer materials had various.For example, in electro-photography apparatus with the such image formation means of (charged)-(image exposure)-(toner development)-(transfer printing)-(cleaning), as the means that the toner image on the photoreceptor are transferred on the transfer materials (for example paper), can enumerate transfer drum and the transfer device shown in the difference among Fig. 1 and Fig. 2.

In Fig. 1, transfer drum 10 has the support that is made of cylinder 12,13 that is configured in two ends and the connecting portion 14 that these cylinders are connected, and stretching in the outer peripheral face open area of this support is provided with transfer medium carrying member 11.In addition, on above-mentioned connecting portion 14, has the transfer materials clamping handle (grip) 15 of controlling from the transfer materials of paper feeding device conveying.

The transfer drum 10 of Gou Chenging is configured in the transfer device shown in Figure 2 like this, and the inboard that the transfer printing of the side and outside configuration within it uses discharger 21 and formation to remove the electric hand section uses the discharger 23 and the outside except that electricity discharger 22,24 except that electricity.Symbol 25 expression discharge metal lines, 26 expression insulating components, 27 expression extruded member, 28 expression disengaging pawls, 31 expression rotary type developing devices.

In addition, the electro-photography apparatus of known following mode also: the toner image that forms on the photoreceptor temporarily is transferred on the intermediate transfer member, then the toner image on the intermediate transfer member is transferred on the transfer materials.

In the transfer printing process in above-mentioned image processing system, because the conveyance, the transfer printing that add transfer materials on transfer medium carrying member 11 be charged, remove various mechanical aspects such as electricity and cleaning or electric aspect external force, therefore require to have permanance, i.e. various characteristics such as physical strength, abrasion performance, electrical endurance to these external force.In addition, also require same characteristic for intermediate transfer member.

Particularly in recent years in order to realize the more high speed of electronic camera technology, realize colorize, panchromaticization of image simultaneously, use gradually the toner image of four looks of cyan, magenta, yellow three looks or cyan, magenta, yellow, black in order continuously on the transfer materials on the transfer medium carrying member or the electro-photography apparatus that carries out transfer printing on the intermediate transfer member.Like this, particularly under panchromatic situation,, also must make the condition of charge characteristic, voltage-resistent characteristic of transfer medium carrying member or intermediate transfer member more strict in order to carry out transfer printing process continuously.

In the past, as transfer medium carrying member or intermediate transfer member, use resins such as teflon, polyester, Kynoar, triacetate and polycarbonate always, the elastic body of isoprene, butadiene, styrene-butadiene, chlorbutadiene-acrylic rubber, polyurethane, siloxane, acrylic acid etc., but the resistance value of these monomers is too high, sometimes produce charging (charge-up) phenomenon during continuously transfer printing, generation transfer printing deinking or transfer printing are bad.

Countermeasure as this charging, proposed so far to use with carbon black etc. as the resin that electric conductivity packing material (hereinafter referred to as " electroconductive stuffing ") disperses, made the intermediate transfer belt (special public clear 60-10625 communique, spy open flat 4-303871 communique) of resistance value with regulation.But because of the amount difference of the electroconductive stuffing that disperses, the anti-flammability of transfer medium carrying member, intermediate transfer member reduces sometimes.In addition, the difference of resin because of the dispersion medium that becomes electroconductive stuffing, sometimes this electroconductive stuffing is difficult to disperse equably, in this case, sometimes the resistance of transfer medium carrying member, intermediate transfer member becomes inhomogeneous, bring obstacle for the transfer printing smoothly of toner image, perhaps cause the reduction of physical strength.

Summary of the invention

Therefore, added electroconductive stuffing and also demonstrated excellent flame even the object of the present invention is to provide, and demonstrated the preferable image characteristic, and also excellent transfer medium carrying member and the intermediate transfer member of physical strength.In addition, another object of the present invention is to provide the image processing system of stably giving the high-grade image.

Promptly, provide according to the present invention:

[1] transfer medium carrying member, this transfer medium carrying member is used for electro-photography apparatus, this transfer medium carrying member contains i) resin and ii) electric conductivity filling agent, this resin contains polycarbonate resin (a), and this polycarbonate resin (a) has the structural unit that contains siloxane structure and contains fluorene structured structural unit.

In addition, as the preferred version of the transfer medium carrying member of above-mentioned [1], can enumerate the formation of following [2]～[9].

[2] above-mentioned [1] described transfer medium carrying member, wherein polycarbonate resin (a) has the structural unit shown in structural unit shown in the following general formula (1) and the following general formula (3):

(in the formula (1), R ₁～R ₄Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₅～R ₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₉And R ₁₀Represent singly-bound or C independently of one another _1-6The divalent aliphatic alkyl,

X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another).

(in the formula (3), R ₂₅～R ₂₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl).

[3] the described transfer medium carrying member in above-mentioned [1] or [2], wherein this resin also contains the polycarbonate resin (b) different with above-mentioned polycarbonate resin (a).

[4] above-mentioned [3] described transfer medium carrying member, wherein this polycarbonate resin (b) has the structural unit shown in structural unit shown in the above-mentioned general formula (1) and the following general formula (2),

(in the formula (2), R ₁₅～R ₁₈Be hydrogen, C independently of one another _1-10Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy, C _7-17Aralkyl, Y is

-S-,-SO ₂-,-O-,-C-,-S-or

Here, R ₁₉～R ₂₄Be hydrogen, C independently of one another _1-10Alkyl, C _2-5Alkenyl, C _1-5Alkoxy or C _6-12Aryl, perhaps represent R ₂₁And R ₂₂And R ₂₃And R ₂₄Combination together forms C _3-12Carbocyclic ring or the group (but not comprising fluorene structured) of heterocycle, a represents 0～20 integer).

[5] the described transfer medium carrying member of each of above-mentioned [2] or [4], wherein in above-mentioned formula (1), R ₅～R ₈Be methyl or phenyl independently of one another.

[6] above-mentioned [5] described transfer medium carrying member, the structural unit shown in the wherein above-mentioned formula (1) are at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5):

(in above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1), specifically, for singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another).

[7] above-mentioned [4] described transfer medium carrying member, the structural unit shown in the wherein above-mentioned general formula (2) have the structure shown in (6) when following:

[8] the described transfer medium carrying member of each of above-mentioned [1]～[7], it is shaped as sheet.

[9] the described transfer medium carrying member of each of above-mentioned [1]～[7], it is shaped as endless belt (endless belt).

In addition, according to the present invention, provide:

[10] electro-photography apparatus, it possesses each described transfer medium carrying member of above-mentioned [1]～[9], and its appendix the transfer materials of the toner image transfer printing of planning to form on the image-carrier and with at least one of the transfer materials of toner image transfer printing.

In addition, according to the present invention, provide:

[11] intermediate transfer member, this intermediate transfer member is used for electro-photography apparatus, this intermediate transfer member contains i) resin and ii) electric conductivity filling agent, this resin contains polycarbonate resin (a), and this polycarbonate resin (a) has the structural unit that contains siloxane structure and contains fluorene structured structural unit.

In addition, as the preferred version of the intermediate transfer member of above-mentioned [11], can enumerate the formation of following [12]～[19].

[12] above-mentioned [11] described intermediate transfer member, wherein above-mentioned polycarbonate resin (a) has the structural unit shown in structural unit shown in the following general formula (1) and the following general formula (3):

(in the formula (1), R ₁～R ₄Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₅～R ₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₉And R ₁₀Represent singly-bound or C independently of one another _1-6The divalent aliphatic alkyl,

X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another).

(in the formula (3), R ₂₅～R ₂₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl).

[13] above-mentioned [11] or [12] described intermediate transfer member, wherein this resin also contains the polycarbonate resin (b) different with above-mentioned polycarbonate resin (a).

[14] above-mentioned [13] described intermediate transfer member, wherein this polycarbonate resin (b) has the structural unit shown in structural unit shown in the above-mentioned general formula (1) and the following general formula (2):

(in the formula (2), R ₁₅～R ₁₈Be hydrogen, C independently of one another _1-10Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy, C _7-17Aralkyl, Y is -S-,-SO ₂-,-O-,-CO-, SO-or

Here, R ₁₉～R ₂₄Be hydrogen, C independently of one another _1-10Alkyl, C _2-5Alkenyl, C _1-5Alkoxy or C _6-12Aryl, perhaps represent R ₂₁And R ₂₂And R ₂₃And R ₂₄Combination together forms C _3-12Carbocyclic ring or the group (but not comprising fluorene structured) of heterocycle, a represents 0～20 integer).

[15] above-mentioned [12] or [14] described intermediate transfer member, wherein in above-mentioned formula (1), R ₅～R ₈Be methyl or phenyl independently of one another.

[16] above-mentioned [15] described intermediate transfer member, the structural unit shown in the wherein above-mentioned formula (1) are at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5):

(in above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1), specifically, for singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another).。

[17] above-mentioned [14] described intermediate transfer member, the structural unit shown in the wherein above-mentioned general formula (2) has the structure shown in the following formula (6):

[18] each described intermediate transfer member of above-mentioned [11]～[17], it is shaped as sheet.

[19] each described intermediate transfer member of above-mentioned [11]～[17], it is shaped as the endless belt.

In addition, according to the present invention, provide:

[20] electro-photography apparatus, it possesses the toner image transfer printing of planning to form on the image-carrier, and the toner image of this transfer printing is transferred to each described intermediate transfer member of above-mentioned [11]～[19] on the transfer materials.

According to the present invention, can obtain transfer medium carrying member or intermediate transfer member, it can suppress charging by adding electroconductive stuffing, even use preferable image, excellent in flame retardance and the intensity height also can not have defectives such as the inhomogeneous or transfer printing deinking of transfer printing repeatedly.

In addition, according to the present invention, can obtain stably to give the image processing system of high-grade electrophotographic image.

Description of drawings

Fig. 1 is the concise and to the point configuration example of the transfer drum of use transfer medium carrying member of the present invention.

Fig. 2 is the concise and to the point configuration example of the transfer device of use transfer medium carrying member of the present invention.

Fig. 3 is the concise and to the point configuration example of the image processing system of the transfer medium carrying member of the present invention of use sheet.

Fig. 4 is the concise and to the point configuration example of the image processing system of the transfer medium carrying member of the present invention of use sheet.

Fig. 5 is the concise and to the point configuration example of the image processing system of the endless belt-shaped transfer medium carrying member of the present invention of use.

Fig. 6 is the concise and to the point configuration example of other image processing systems of the endless belt-shaped transfer medium carrying member of the present invention of use.

Fig. 7 is the concise and to the point configuration example of the image processing system of the endless belt-shaped intermediate transfer member of the present invention of use.

Fig. 8 is the concise and to the point configuration example of other image processing systems of the endless belt-shaped intermediate transfer member of the present invention of use.

Embodiment

The related transfer medium carrying member of an embodiment of the present invention comprises:

I) resin and

Ii) electric conductivity filling agent,

This resin comprises the polycarbonate resin that has the structural unit that contains siloxane structure and contain fluorene structured structural unit (below be also referred to as " composition a ").

In addition, intermediate transfer member involved in the present invention comprises:

I) resin and

Ii) electric conductivity filling agent,

This resin comprises the polycarbonate resin that has the structural unit that contains siloxane structure and contain fluorene structured structural unit (below be also referred to as " composition a ").

As the above-mentioned concrete example that contains the structural unit of siloxane structure and contain fluorene structured structural unit, comprise the structural unit shown in following general formula (1) and (3) are separately.

In addition, transfer medium carrying member involved in the present invention and intermediate transfer member are except the polycarbonate resin as mentioned component a, can also contain the polycarbonate resin different (below be also referred to as " composition b ") with this composition a, concrete example as the polycarbonate resin of this composition b comprises the polycarbonate resin with structural unit shown in structural unit shown in the following general formula (1) and the following general formula (2).

(in the formula (1), R ₁～R ₄Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₅～R ₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₉And R ₁₀Represent singly-bound or C independently of one another _1-6The divalent aliphatic alkyl,

X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another).

(in the formula (3), R ₂₅～R ₂₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl).

(in the formula (2), R ₁₅～R ₁₈Be hydrogen, C independently of one another _1-10Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy, C _7-17Aralkyl, Y is

-S-,-SO ₂-,-O-,-CO-,-SO-or

Here, R ₁₉～R ₂₄Be hydrogen, C independently of one another _1-10Alkyl, C _2-5Alkenyl, C _1-5Alkoxy or C _6-12Aryl, perhaps represent R ₂₁And R ₂₂And R ₂₃And R ₂₄Combination together forms C _3-12Carbocyclic ring or the group (but not comprising fluorene structured) of heterocycle, a represents 0～20 integer).

Below the polycarbonate resin of composition a and composition b is described.

In as the structural unit that contains polysiloxane structure shown in the above-mentioned general formula (1) in the polycarbonate resin of composition a and composition b, R ₅～R ₈Preferably be methyl or phenyl independently of one another, more particularly, the structural unit shown in the above-mentioned general formula (1) is preferably at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5).

(in above-mentioned formula (4) and (5), X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another.

As the compound that derives structural unit shown in the above-mentioned formula (1), specifically can enumerate the compound shown in following structural formula (1)-1～(1)-12.

(1)-1

In above-mentioned formula (1)-1～(1)-12, X is for being selected from

With

At least 1 structural unit or the linking group that constitutes of its polymkeric substance.Here, when this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit.In addition, when this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the degree of polymerization was 2～200.Contain the linking group of 1～100 dimethyl siloxane or 1～100 diphenyl siloxane or their random copolymers among the preferred X.

The above-mentioned cited compound that derives structural unit shown in the above-mentioned formula (1) also can more than 2 kinds and be used.As the compound that derives structural unit shown in the above-mentioned formula (1), the α that comprises in the structure shown in the preferred especially above-mentioned formula (1)-1 or 7, the α that comprises in the structure shown in ω-two [3-(salicyl) propyl group] poly dimethyl diphenyl random copolymerization siloxane, the above-mentioned formula (1)-7, ω-two [3-(salicyl) propyl group] dimethyl silicone polymer.

In addition, as the compound that derives as structural unit shown in the above-mentioned general formula (2) in the polycarbonate resin of composition b, specifically can enumerate 4,4 '-'-biphenyl diphenol, two (4-hydroxyphenyl) methane, two (4-hydroxyphenyl) ether, two (4-hydroxyphenyl) sulfone, two (4-hydroxy-3-methyl phenyl) sulfone, two (4-hydroxyphenyl) sulfoxide, two (4-hydroxyphenyl) thioether, two (4-hydroxyphenyl) ketone, 1,1-two (4-hydroxyphenyl) ethane, 2,2-two (4-hydroxyphenyl) propane (bisphenol-A; BPA), 2,2-two (4-hydroxyphenyl) butane, 1,1-two (4-hydroxyphenyl) cyclohexane (bisphenol Z; BPZ), 2,2-two (4-hydroxy-3-methyl phenyl) propane (dimethyl bisphenol-A), 2,2-two (4-hydroxyl-3,5-3,5-dimethylphenyl) propane, 1,1-two (4-hydroxyphenyl)-1-diphenylphosphino ethane (bisphenol-ap; BPAP), two (4-hydroxyphenyl) diphenyl methane, 2,2-two (4-hydroxyl-3-allyl phenyl) propane, 3,3,5-trimethyl-1,1-two (4-hydroxyphenyl) cyclohexane (trimethyl bisphenol Z; TMBPZ) etc.These also can more than 2 kinds and be used.In addition, wherein preferred especially 2,2-two (4-hydroxyphenyl) propane.

As deriving as the compound that contains fluorene structured structural unit shown in the above-mentioned general formula (3) in the polycarbonate resin of composition a, specifically can enumerate 9,9-two (4-hydroxy-2-methyl phenyl) fluorenes, 9,9-two (4-hydroxy-3-methyl phenyl) fluorenes, 9,9-two (4-hydroxyphenyl) fluorenes, 3,6-dimethyl-9,9-two (4-hydroxyphenyl) fluorenes, 9,9-two (3-methoxyl-4-hydroxyphenyl) fluorenes, 9,9-two (3-ethoxy-4-hydroxyphenyl) fluorenes, 9,9-two (3-ethyl-4-hydroxyphenyl) fluorenes, 4,5-dimethyl-9,9-two (4-hydroxyphenyl) fluorenes, 9,9-two (3-phenyl-4-hydroxyphenyl) fluorenes, 3,6-dimethyl-9,9-two (3-methyl-4-hydroxyphenyl) fluorenes and 3,6-diphenyl-9,9-two (4-hydroxyphenyl) fluorenes etc.Wherein, preferred especially 9,9-two (4-hydroxyphenyl) fluorenes, 9,9-two (4-hydroxy-3-methyl phenyl) fluorenes, 9,9-two (4-hydroxy-2-methyl phenyl) fluorenes.These compounds also can more than 2 kinds and be used.

In addition, polycarbonate resin as composition a must contain the structural unit shown in above-mentioned formula (1) and (3), do not contain other structural units but do not get rid of, for example can also contain as the structural unit shown in the above-mentioned formula (2) of structural unit of the polycarbonate resin that becomes b.

Therefore, polycarbonate resin as composition a, by compound with respect to the structural unit shown in the above-mentioned general formula (1) of for example deriving, the compound of structural unit shown in the above-mentioned formula of deriving (3), and the general assembly (TW) of the compound of structural unit shown in for example above-mentioned formula of structural unit (2) beyond the structural unit shown in above-mentioned formula (1) and (3) of deriving, make compound 10～90 weight % of the structural unit shown in the above-mentioned general formula (1) of deriving, compound 10～90 weight % of structural unit shown in the above-mentioned formula of deriving (3), the above-mentioned formula of deriving (1) and (3) compound 0～80 weight % of structural unit in addition form the compound reaction with carbonic ester separately and synthesize.

In addition, as the polycarbonate resin that becomes b, by general assembly (TW), make compound 50～99.9 weight % of structural unit shown in compound 0.1～50 weight %, the above-mentioned formula of deriving (2) of the structural unit shown in the above-mentioned formula (1) of deriving form the compound reaction with carbonic ester separately and synthesize with respect to the compound of structural unit shown in the compound of the structural unit shown in the above-mentioned formula (1) of for example deriving, the above-mentioned formula of deriving (2).

As the compound of above-mentioned each structural unit of deriving and the reaction method of carbonic ester formation compound, can use the known method of using when for example making the polycarbonate of deriving, for example the ester exchange reaction methods such as (ester-interchange methods) of the direct reaction (phosgenation) of bisphenols photoreactive gas or bisphenols and diaryl carbonate by bisphenol-A.

In addition, form compound, can enumerate for example phosgene as above-mentioned carbonic ester, and diaryl carbonates such as diphenyl carbonate, two pairs of toluene esters of carbonic acid, phenyl p-methylphenyl carbonic ester, two pairs of chlorobenzene esters of carbonic acid, carbonic acid dinaphthyl ester.These compounds also can more than 2 kinds and be used.

In the former phosgenation, usually in the presence of acid binding agent and solvent, make the compound and the phosgene reaction of structural unit shown in the compound, the general formula of deriving (3) of structural unit shown in the compound, the general formula of deriving (2) of the structural unit shown in the formula of of the present invention (1) of deriving.As acid binding agent, can use for example pyridine, and alkali-metal oxyhydroxide such as NaOH, potassium hydroxide etc., in addition,, can use for example methylene chloride, chloroform, chlorobenzene, dimethylbenzene etc. as solvent.In addition, in order to promote polycondensation reaction, add the such catalyzer such as tertiary amine catalyst of triethylamine, in addition, in the degree of polymerization is regulated, add phenol, p-tert-butylphenol, to simple function group compounds such as cumylphenol, alkyl-substituted phenols class, hydroxybenzoic acid alkyl esters or alkoxy phenols as molecular weight regulator.In addition, can add antioxidant such as sodium sulphite, hydrosulfite, phloroglucin, isatin bis-phenol, 1,1,1-three (4-hydroxyphenyl) ethane, α, α ', α on a small quantity as required "-three (4-hydroxyphenyl)-1,3, branching agents such as 5-tri-isopropyl benzene.Reaction usually 0～150 ℃, preferably under 5～40 ℃ scope, be suitable.Reaction time is determined by temperature of reaction, is generally 0.5 minute～10 hours, is preferably 1 minute～2 hours.In addition, preferred pH with reaction system remains on more than 10 in the reaction.

On the other hand, in the latter's ester-interchange method, to the derive compound of structural unit shown in the compound, the general formula of deriving (2) of structural unit shown in the formula of of the present invention (1) and the compound of the structural unit shown in the general formula (3) of deriving mixes with diaryl carbonate, under reduced pressure, react under the high temperature.At this moment, can add phenol, p-tert-butylphenol, to simple function group compounds such as cumylphenol, alkyl-substituted phenols class, hydroxybenzoic acid alkyl esters or alkoxy phenols as molecular weight regulator.Reaction usually 150～350 ℃, preferably under the temperature of 200～300 ℃ of scopes, carry out, in addition, decompression degree finally preferably reaches below the 1mmHg, and the phenols from this diaryl carbonate of ester exchange reaction generation is distillated outside the system.Reaction time is generally about 1～6 hour by decisions such as temperature of reaction, decompression degree.Reaction is preferably carried out under inert gas atmospheres such as nitrogen, argon, in addition, can add antioxidant as required, branching agent reacts.

For phosgenation and ester-interchange method, when the compound of the compound of structural unit shown in the compound of the structural unit shown in the general formula (1) of considering to derive, the general formula of deriving (2) and the structural unit shown in the general formula (3) of deriving reactive, preferred phosgenation.

In the present invention, when adopting phosgenation, as operable tertiary amine polymerization catalyst, comprise for example triethylamine, Tri-n-Propylamine, tri-n-butylamine, N, N '-dimethyl cyclohexyl amine, N, N '-diethylaniline, diethyl amino yl pyridines etc., from the problem that catalytic activity, washing are removed, preferred triethylamine.The addition of polymerization catalyst is with respect to the whole bisphenols that use, preferred 0.001～5mol%.

In the present invention, when adopting phosgenation,, can add quaternary ammonium salt on a small quantity in order to react efficiently.As quaternary ammonium salt, can specifically enumerate tetramethyl ammonium chloride, trimethyl benzyl ammonia chloride, triethyl benzyl ammonia chloride, tetraethylammonium bromide, tetrabutylammonium iodide etc., wherein preferred trimethyl benzyl ammonia chloride, triethyl benzyl ammonia chloride.This quaternary ammonium salt is with respect to the whole bisphenols that use, general preferred use 0.005～5mol%.

In addition, when using molecular weight regulator among the present invention, preferred especially monohydric phenol specifically can be enumerated phenol, and alkyl-substituted phenols such as butylphenol, octyl phenol, nonylphenol, decyl phenol, tetradecylphenol, heptadecyl phenol, octadecyl phenol; Hydroxybenzoic acid Arrcostabs such as butoben, hydroxybenzoic acid monooctyl ester, hydroxybenzoic acid ester in the ninth of the ten Heavenly Stems, hydroxybenzoic acid ester in the last of the ten Heavenly stems, hydroxybenzoic acid heptadecyl ester; Butoxy phenol, octyloxy phenol, the ninth of the ten Heavenly Stems oxygen base phenol, the last of the ten Heavenly stems alkoxy phenols such as oxygen base phenol, tetradecyloxyaniline phenol, heptadecane oxygen base phenol, octadecane oxygen base phenol.The addition of this molecular weight regulator is 0.1～50mol% with respect to whole bisphenols, is preferably 0.5～10mol%.

(composition a) and thermoplastic polycarbonate resin (composition b), preferred characteristics viscosity is the scope of 0.2～1.0dl/g by synthetic thermoplastic polycarbonate resin with siloxane structure and fluorene structured compound deriving involved in the present invention in these reactions.If in this scope, can obtain the resin of physical strength excellence and mouldability excellence.

Preferably in the whole monomers that use, the compound of structural unit is preferably 0～50 weight % to the thermoplastic polycarbonate resin of using among the present invention (composition b) shown in the general formula of deriving (1), more preferably 0～30 weight %.In addition, (a) preferably in the whole monomers that use, structural unit is preferably 1～80 weight % to composition to the thermoplastic polycarbonate resin of using among the present invention shown in the general formula (1), more preferably 2～50 weight %.

In addition, thermoplastic polycarbonate resin of the present invention (composition is a) and in whole use monomers of (composition b), and the compound of the structural unit shown in the general formula (1) of preferably deriving is 1～50 weight %, more preferably 2～20 weight %.

In the polycarbonate resin of composition a and b, compound by making the structural unit shown in the above-mentioned general formula (1) of deriving is above-mentioned scope with respect to the ratio of whole use monomers, can give transfer medium carrying member involved in the present invention, intermediate transfer member anti-flammability really as target, and can the enough intensity of appendix as the moulding product.

Thermoplastic polycarbonate resin composition involved in the present invention, in the thermogravimetric analysis under the nitrogen, preferred 1% heating loss temperature is more than 380 ℃, and/or 5% heating loss temperature is more than 430 ℃.More preferably 1% heating loss temperature is more than 400 ℃, and/or 5% heating loss temperature is more than 450 ℃.

Below electric conductivity filling agent (composition c) is described.

As the electric conductivity filling agent in the thermoplastic polycarbonate resin composition involved in the present invention, can use for example conductive carbon etc.As conductive carbon, be not particularly limited, but, can enumerate conductive carbon black, carbon fiber as the preferred example that uses.As the concrete example of conductive carbon black, can enumerate supraconductivity furnace black (super conductive furnaceblack), electric conductivity furnace black, supraconductivity furnace black (extraconductivefurnace black), super abrasion furnace black (superabrasion furnace black) and carbon fibrils (carbon fibrils) etc.

Conductive carbon is necessary for n-butyl phthalate (DBP) oil absorption and is preferably 100～500ml/100g, the carbon black of 120～400ml/100g more preferably.When this DBP oil absorption was bigger than 500ml/100g, the disperse state of carbon worsened, and had the aggegation piece in a large number when forming resin combination, and in addition, when DBP oil absorption deficiency 100ml/100g, electric conductivity is given weak effect, and is therefore not preferred.As carbon black with such characteristic, can enumerate the Ketjenblack EC of for example Lion company manufacturing of on market, selling as conductive carbon black, VULCAN XC-72, XC-305, XC-605 that Cabot company makes, the DenkaBlack that Denki Kagaku Kogyo kabushiki makes etc., can be set forth under the existence of hydrogen and oxygen with hydrocarbon partial oxidations such as naphthas the carbon black of the carbon black of the above-mentioned characteristic of by-product or above-mentioned characteristic that its oxidation or reduction are handled etc. when making the forming gas that contains hydrogen and carbon monoxide in addition.As above-mentioned conductive carbon black, preferred mean grain size 10～100 μ m, specific surface area 200m ²The conductive carbon black that/g is above.

A kind of as conductive carbon black can also enumerate carbon fiber.As concrete example, it is the following carbon fiber of average fiber footpath (diameter) 200nm, for having the fiber of tubular structure, can be single layer structure, also can be sandwich construction.The preferred carbon fibrils of putting down in writing in the flat 8-508534 communique of for example special table of using.Carbon fibrils has the graphite skin that deposits along this fibriilar cylindrical shaft in fact with one heart, and its fibrillar center axle is not a linearity, has cranky tubulose form.The fiber diameter of this carbon fibrils is determined by manufacture method, and is roughly even.

If the fiber diameter of carbon fibrils is bigger than 200nm, the interfibrillar contact in the resin becomes insufficient, is difficult to obtain stable resistance value.Therefore, as carbon fibrils, use the following fibrillation of fiber diameter 200nm.If the fiber diameter of carbon fibrils is below the 20nm, the resistance value of the formed body of preparation becomes evenly, and is therefore preferred especially.But if the fiber diameter of carbon fibrils is too small, owing to make the difficulty especially that becomes, so the fiber diameter of carbon fibrils is preferably more than the 0.1nm, is preferably more than the 0.5nm especially.

In addition, the ratio (length/diameter) of the length of carbon fibrils and fiber diameter is preferably more than 5, and is preferred especially more than 100, most preferably has the carbon fibrils of 1000 above lengths.In addition, the thickness with fibriilar wall (wall thickness of tubular body) of fine tubulose form is generally about 3.5～75nm.This is equivalent to about 0.1～0.4 times of fibriilar external diameter usually.

Conductive carbon amount in the thermoplastic polycarbonate resin composition involved in the present invention (composition c) is for (composition total a)+(composition b)+(composition c) is measured 0.5～30 weight % among the 100 weight %, preferred 0.5～15 weight %.If the quantity not sufficient of conductive carbon black 0.5 weight %, the electric conductivity deficiency of resin combination, on the other hand, if surpass 30 weight %, mouldability significantly descends, and perhaps the intensity of moulding product reduces.Even when the amount of conductive carbon in the above range after a little while, the electric conductivity of resin combination reduces under low-voltage sometimes, but by improving voltage, also can obtain enough electric conductivity.

As the modulator approach of thermoplastic polycarbonate resin composition involved in the present invention, can use known so far the whole bag of tricks, be not particularly limited.Preferred for example use method that thermoplastic resin powder and conductive carbon are mixed, the fused mass of thermoplastic resin and conductive carbon are cooperated and mixing melting mixing method or make conductive carbon be distributed in the solution that is dissolved with thermoplastic resin in the solvent after method that solvent is suitably removed etc.

In transfer medium carrying member involved in the present invention, intermediate transfer member, except the composition a, the b that have stated, c, for example also can add metal organic sulfonate as ingredient d arbitrarily.

As metal organic sulfonate, be not particularly limited, can enumerate aliphatic sulfonic slaine, aromatic sulphonic acid slaine etc.As the metal of metal organic sulfonate, can preferably enumerate alkaline metal, alkaline-earth metal etc., as alkaline metal and alkaline-earth metal, can enumerate sodium, lithium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium and barium etc.Metal organic sulfonate may be used alone, can also be two or more kinds in combination.

As the metal organic sulfonate of ingredient d,, can preferably enumerate perfluoroalkane-metal organic sulfonate, aromatic series sulfone metal organic sulfonate etc. from anti-flammability and thermal stability aspect.

As perfluoroalkane-metal organic sulfonate, can preferably enumerate the alkali metal salt of perfluoroalkane-sulfonic acid, the alkali earth metal salt of perfluoroalkane-sulfonic acid etc., more preferably have C _4-8The perfluoroalkane base sulfonic acid alkali metal salts, have C _4-8The sulfonic acid alkali earth metal salt etc. of perfluoroalkane base.

As the concrete example of perfluoroalkane-metal organic sulfonate, can enumerate the tetraethyl ammonium salt of perfluorinated butane-sodium sulfonate, perfluorinated butane-potassium sulfonate, perfluoro-methyl butane-sodium sulfonate, perfluoro-methyl butane-potassium sulfonate, PFO-sodium sulfonate, PFO-potassium sulfonate, perfluorinated butane-sulfonic acid etc.

As aromatic series sulfone metal organic sulfonate, can preferably enumerate aromatic series sulfone sulfonic acid alkali metal salts, aromatic series sulfone sulfonic acid alkali earth metal salt etc., aromatic series sulfone sulfonic acid alkali metal salts, aromatic series sulfone sulfonic acid alkali earth metal salt can be polymkeric substance.

Concrete example as aromatic series sulfone metal organic sulfonate, can enumerate the sodium salt of diphenylsulphone-3-sulfonic acid, the sylvite, 4 of diphenylsulphone-3-sulfonic acid, the sodium salt, 4 of 4 '-dibromo diphenylsulphone-3-sulfonic acid, the calcium salt of the sylvite of 4 '-dibromo diphenylsulphone-3-sulfonic acid, 4-chloro-4 '-nitro diphenylsulfone-3-sulfonic acid, diphenylsulphone-3, the disodium salt of 3 '-disulfonic acid, diphenylsulphone-3, the di-potassium of 3 '-disulfonic acid etc.

The use level of organometallics (ingredient d) is with respect to (composition total a)+(composition b)+(composition c) is measured 100 weight %, is 0.01～0.5 weight %.If be the use level of lacking than 0.01 weight %, flame retardant effect reduces, if cooperate manyly than 0.5 weight %, can not expect that not only flame retardant effect further improves, and cause foaming, the reduction of folding strength, the bad order of formed body.

Thermoplastic polycarbonate resin composition involved in the present invention can contain various thermoplastic resins and adjuvant etc. in the scope of performance effect of the present invention.

As other thermoplastic resins beyond the polycarbonate resin, can enumerate for example polyester (polyethylene terephthalate, polybutylene terephthalate etc.), polyamide, tygon, polypropylene, polystyrene, acrylonitrile-styrene (AS) resin, acrylonitrile-butadiene-styrene (ABS) (ABS) resin, polymethylmethacrylate etc.In addition, as elastic body, for example can also use butyl rubber, styrene butadiene rubbers, ethylene-propylene rubber, acrylic elastomer, polyester based elastomers, polyamide-based elastic body, be thermoplastic elastomers such as the elastomeric MBS of core-shell type, MAS.

As other various adjuvants, can cooperate for example reinforcing agent (talcum, mica, clay, wollastonite, lime carbonate, glass fibre, beaded glass, glass bead, grind fiber, glass sheet, carbon fiber, carbon plate, the carbon pearl, carbon grinds fiber, sheet metal, metal fibre, metal coated glass fiber, metal coating carbon fiber, the metal coated glass sheet, silicon dioxide, ceramic particle, ceramic fiber, the aromatic polyamide particle, aromatic polyamide fibre, the polyarylate fiber, graphite, conductive carbon black, various whiskers etc.), fire retardant (halogen system, phosphate system, slaine system, red phosphorus, metal hydrate system etc.), thermal stabilizer, ultraviolet light absorber, light stabilizer, release agent, lubricant, antiseize paste (PTFE particle etc.), colorant (carbon black, pigment such as titanium dioxide, dyestuff), light diffusing agent (acrylic acid crosslinked particle, silicone cross-linked particle, glass sheet as thin as a wafer, calcium carbonate particle etc.), fluorescer, light-storing paint, fluorescent dye, antistatic agent, modification agent flows, nucleating agent, inorganic and organic antiseptic, photocatalysis is an anti fouling agent (particulate titanium dioxide, particulate oxide zinc etc.), with the graft rubber is the impact modifying agent of representative, infrared absorbent, photochromic agent.

Thermoplastic polycarbonate resin composition involved in the present invention by will each above-mentioned composition (composition a), (composition b), (composition c) and (ingredient d) and the various adding ingredients cooperations of use as required, carry out mixing and modulate.Adopt normally used method in this cooperation, in mixing, for example can adopt and use ribbon blender, Henschel mixer, banbury mixers, rotary drum mixer, single screw extrusion machine, double screw extrusion machine, the method for kneader, multi-screw extruder etc. is carried out altogether.Heating-up temperature when mixing is selected in 240～330 ℃ scope usually.Zhi Bei flame-retardant polycarbonate resin composition can adopt known various forming methods like this, and moulding such as for example injection moulding, slush molding, extrusion molding, compression forming, calendering formation, rotational forming obtain moulding product of the present invention.

Transfer medium carrying member of the present invention or intermediate transfer member, can adopt methods such as extrusion molding, injection moulding, cast molding to be shaped to the shape of film like, sheet, band shape, drum type, shape can be sheet, also can adopt thermal welding, ultrasonic fusing and utilize the means such as bonding of bonding agent that the sheet end is become endless belt-shaped, in addition, also the sheet multilayer can be batched, employing thermal welding etc. is shaped to the endless belt with required film thickness.Shape can be any most preferred shape according to employed image processing system.The thickness of transfer medium carrying member of the present invention or intermediate transfer member is different because of Young modulus, the specific insulation of bonding agent, but is preferably 30 μ m～2000 μ m, preferred especially 50 μ m～800 μ m.

In addition, transfer medium carrying member of the present invention or intermediate transfer member can have protective seam, dielectric layer, resistant layer, conductive layer at surface, the back side.

As the form of the contact electrification member that uses in the image processing system of the present invention, can enumerate roller, brush (magnetic brush), blade etc.In addition, as the material of contact electrification member, can from various metals, conductive metal oxide, conductive carbon and material, choose their mixing.Perhaps can use the material that in resin, elastic body, disperses above-mentioned electric conductivity powder.

The particular instantiation of the form of the image processing system with transfer medium carrying member of the present invention is in Fig. 3～Fig. 6.Fig. 3～image processing system shown in Figure 6 is polychrome (panchromatic) image processing system.

At first simply describe with reference to Fig. 3.Polychrome electrofax copy device shown in Figure 3 has that to be supported the image-carrier that rotates freely along direction of arrow a by axle be photosensitive drums 33, forms means at its peripheral part configuration image.This image forms means can be any means, possess the once charged device 34 of the photosensitive drums of making 33 uniform chargeds, light image that irradiation is decomposed by look or the light image suitable in this example with it, on photosensitive drums 33, form electrostatic latent image the exposure means 32 that for example constitutes by laser beam exposure device etc., make electrostatic latent image on the photosensitive drums 33 become the rotary type developing device 31 of visual image.

Rotary type developing device 31 constitutes by these four developers of four developer 31Y, 31M, 31C, 31BK and maintenances of the four look developers that accommodate yellow developer, magenta developer, blue developer and black reagent respectively and by a housing of the approximately cylindrical shape that support rotates freely.The feasible rotation by housing of the formation of this rotary type developing device 31 is transported to the position relative with the outer peripheral face of photosensitive drums 33 with required developer, carries out the development of the electrostatic latent image on the photosensitive drums, makes the panchromatic development of four color parts become possibility.

Visual image on the photosensitive drums 33 is that toner image is transferred on the transfer materials P that is also carried by 10 appendix of transfer device.In this example, transfer device 10 is for being supported the transfer drum that rotates freely by axle.

Below the formation operation of the full-colour image of the polychrome electrofax copy device that adopts above-mentioned formation is carried out simple declaration.

By once charged device 34 is after carrying out uniform charged on the photosensitive drums 33,32 irradiations and the corresponding light image E of image information of usefulness exposure device form electrostatic latent image on photosensitive drums 33.This electrostatic latent image is by rotary type developing device 31, and the toner image that forms on photosensitive drums 33 as the toner that in order to resin is base material becomes visual image.

On the other hand, transfer materials P is transported to transfer drum 10 by resist roller 36 and the image ground same period, and usefulness clamping handle 15 grades are carried its leading section clamping along arrow b direction among the figure.

Then, in the zone that joins with photosensitive drums 33, by adopting transfer printing to accept and the opposite polarity corona discharges of toner with discharger 21, the back side of the transfer medium carrying member 11 of the present invention that the toner image on the photosensitive drums 33 is had from transfer drum 10 is transferred on the transfer materials P.

Transfer materials P is behind the transfer printing process that has carried out necessary number of times, the limit is adopted except that electric and is removed with discharger 22,23 and 24, peel off from transfer drum 10 by the effect of disengaging pawl 28 on the limit, in fuser 39, accept thermogenetic photographic fixing by carry strap 38 after, be discharged to outside the machine.

On the other hand, photosensitive drums 33 is supplied with image forming course once more after the remaining toner cleaning of using cleaning device 37 with the surface.

In addition, the surface of the transfer medium carrying member 11 of transfer drum 10 after by cleaning, is supplying to image forming course by cleaning device 35a with blade or hairbrush etc. and the effect of cleaning supplementary means 35b too once more.

In the present invention, as shown in Figure 2, preferably on the division board of transfer printing, insulating component 26 is set with sense of rotation (direction of the arrow b) downstream of the transfer drum 10 of corona discharger 21, for example polycarbonate resin plate etc. becomes in the transfer printing corona towards the many structures of the transfer printing corona amount of photosensitive drums 33 directions.

In addition, in the present invention, can be provided with from its moving direction downstream of importing side direction of transfer medium carrying member 11 and extend and rubber-like extruded member 27.This extruded member 27 is 10 by for example preferred volume resistivity such as tygon, polypropylene, polyester, polyethylene terephthalate ¹⁰Ω cm is above, be preferably 10 especially ¹⁴The above synthetic resin film of Ω cm constitutes, and is configured on the whole zone of transfer printing portion.

In addition, the elastic force that this extruded member 27 has because of himself pushes transfer medium carrying member 11, and the leading section of its transfer medium carrying member 11 sides is preferably transfer materials P and photosensitive drums 33 last position contacting or beginning position contacting or extremely approaching pairing position, position.

Fig. 4 is illustrated in the polychrome electrofax copy device shown in Figure 3, as the back side from transfer medium carrying member 11 give with the transfer printing of toner polarity opposite charges with charged device 21, be provided with the example of brush electrical equipment 21a.In Fig. 4, because the formation of other key elements and action are identical in fact with content among Fig. 3, therefore no longer detailed description.

Fig. 5 discloses the concrete example that uses the image processing system that is shaped as the transfer medium carrying member of the present invention when endless belt-shaped.

Image processing system shown in Figure 5 has photosensitive drums 41a～41d, dispose 1 charged device 42a～42d, exposure device 43a～43d, developer 44a～44d, transfer belt electrical equipment 45a～45d around it, remove tele-release electrical equipment 46a～46d and 47a～47d, photosensitive drums is with cleaning device 48a～48d, in addition, for these unit are connected, the endless belt-shaped transfer medium carrying member 40 of the present invention of preparation below photosensitive drums, preparation have the transfer medium carrying member cleaning device 50 of polyurethane blade 49.

Transfer materials P is by behind the feed roll paper feeding, is handled upside down with the transfer printing portion of discharger 45a～45d by having disposed each transfer printing from endless belt-shaped transfer medium carrying member 40.

Fig. 6 is illustrated in the image processing system shown in Figure 5, replaces transfer belt electrical equipment 45a-45d and uses the example of transfer printing with the charged device 45e～45h of blade.In Fig. 6, the formation of other key elements is identical in fact with the content of Fig. 5 with work, therefore no longer describes in detail.

Fig. 7 has represented to use other image processing systems of endless belt-shaped intermediate transfer member of the present invention.This image processing system has photosensitive drums 51, dispose 1 charged roller 52, image exposing apparatus 53,54,1 charged device 55 of corona transfer of rotation developer, photosensitive drums around it with cleaning device 56, below photosensitive drums, also dispose endless belt-shaped intermediate transfer member of the present invention 57, on the intermediate transfer member unit, dispose transfer belt electrical equipment 58 2 times.Transfer materials P is by behind the feed roll paper feeding, is handled upside down by 2 transfer printing portions between endless belt-shaped intermediate transfer member 57 and 2 transfer rolls 58.

Fig. 8 is illustrated in the image processing system shown in Figure 7, replaces 1 charged device 55a of corona transfer and uses the example of 1 charged device 55b of transfer roll.In Fig. 8, the formation of other key elements is identical in fact with the content of Fig. 7 with work, therefore no longer describes in detail.

Embodiment

Followingly the present invention is described in more detail, but the present invention is not subjected to the restriction of these embodiment according to embodiment.

[starting material]

The synthesis example of the polycarbonate resin that uses in embodiment and the comparative example and other starting material are as follows.

(composition b)

Synthesis example 1[PC's (b1) is synthetic]

Add polyorganosiloxane compounds (the system X-22-1821 of the Shin-Etsu Chemial Co., Ltd) 0.35kg and 2 of following structure in the sodium hydrate aqueous solution 42L of 8.8% (w/v), 2-two (4-hydroxyphenyl) propane (hereinafter to be referred as BPA) 6.65kg and hydrosulfite 20g dissolve.To wherein adding methylene chloride 36L, the limit remains on 15 ℃ of limits and stirs, and is blown into phosgene 3.50kg with 0.12kg/ minute speed.After being blown into end, add p-tert-butylphenol 158g (being designated hereinafter simply as PTBP), proceed 10 minutes vigorous stirring, add the triethylamine of 10ml again, stir about made its polymerization in 1 hour.

A is average 39

Polymer fluid is separated into water and organic phase, uses in the phosphoric acid and organic phase, wash repeatedly after the conductivity of washing lotion reaches below the 10 μ S/cm, obtain refining resin liquid.Resin liquid is slowly splashed in powerful 60 ℃ the warm water that stirs, when solvent is removed, make polymkeric substance become solid.Solids is filtered the back drying, obtain the white powder shaped polymer.This polymkeric substance is in the concentration 0.5g/dl solution that with the methylene chloride is solvent, and the limiting viscosity [η] under 20 ℃ of the temperature is 0.48dl/g.The copolymerization polycarbonate that will synthesize later on is abbreviated as PC (b1).By infrared absorption spectrum the above-mentioned polymkeric substance of preparation is analyzed, be found that at 1000～1100cm ^-1The position absorption, the 1770cm that have siloxane bond to produce ^-1Absorption, 1240cm that near position has carbonyl to produce ^-1The absorption that near position has ehter bond to produce confirms to have siloxane bond and carbonic acid ester bond.In addition, at 3650～3200cm ^-1The position almost do not have to find absorption from hydroxyl.When adopting gpc analysis that the monomer in this polymkeric substance is measured, all monomers are below the 20ppm.Comprehensive these results verification, this polymkeric substance be the carbonate polymer of the copolymerization ratio identical with reinforced composition.

Synthesis example 2[PC's (b2) is synthetic]

Except use and synthesis example 1 isostructural polyorganosiloxane compounds 1.14kg, BPA6.46kg, with the similarly synthetic copolymerization polycarbonate of synthesis example 1.The limiting viscosity of the copolymerization polycarbonate of preparation is 0.45dl/g.The copolymerization polycarbonate that will synthesize later on is abbreviated as PC (b2).Adopt infrared absorption spectrum analysis etc. confirm except the polymerization of this polymkeric substance than, have the carbonate polymer structure same with synthesis example 1.

Synthesis example 3[PC's (b3) is synthetic]

Except using 2, outside 2-two (4-hydroxy-3-methyl phenyl) propane 4.45kg, the BPA 2.64kg, similarly synthesize the copolymerization polycarbonate with synthesis example 1.The limiting viscosity of the copolymerization polycarbonate of preparation is 0.51dl/g.The copolymerization polycarbonate that will synthesize later on is abbreviated as PC (b3).By infrared absorption spectrum the above-mentioned polymkeric substance of preparation is analyzed, be found that at 1770cm ^-1Absorption, 1240cm that near position has carbonyl to produce ^-1The absorption that near position has ehter bond to produce confirms to have carbonic acid ester bond.In addition, at 3650～3200cm ^-1The position almost do not have to find absorption from hydroxyl.When adopting gpc analysis that the monomer in this polymkeric substance is measured, all monomers are below the 20ppm.Comprehensive these results verification, this polymkeric substance be the carbonate polymer of the copolymerization ratio identical with reinforced composition.

PC1 from bisphenol-A: Mitsubishi's gas chemistry (strain) system, trade name: ユ one ピ ロ Application S-2000, limiting viscosity 0.53dl/g, be abbreviated as BPAPC1 later on.

PC2 from bisphenol-A: Mitsubishi's gas chemistry (strain) system, trade name: ユ one ピ ロ Application E-1000, limiting viscosity 0.61dl/g, be abbreviated as BPAPC2 later on.

(composition a)

Synthesis example 4[PC's (a1) is synthetic]

Add polyorganosiloxane compounds (the system X-22-1827 of the Shin-Etsu Chemial Co., Ltd) 2.60kg, 9 of following structure in the sodium hydrate aqueous solution 30L of 8.8% (w/v), 9-two (4-hydroxy-3-methyl phenyl) fluorenes (hereinafter to be referred as BCFL) 3.91kg, BPA 0.49kg and hydrosulfite 20g dissolve.To wherein adding methylene chloride 30L, the limit remains on 15 ℃ of limits and stirs, and is blown into phosgene 1.81kg with 0.12kg/ minute speed.After being blown into end, add PTBP 88g, proceed 10 minutes vigorous stirring, add the triethylamine of 50ml again, stir about made its polymerization in 1 hour.

Be that these plural blocks are realized random combination.

The total average out to 26 of diformazan matrix.The total average out to 13 of hexichol matrix.

Later and synthesis example 1 is similarly handled, and the limiting viscosity of the copolymerization polycarbonate of preparation is 0.28dl/g.The copolymerization polycarbonate that will synthesize later on is abbreviated as PC (a1).Employing infrared absorption spectrum analysis etc. confirms that this polymkeric substance is and the reinforced carbonate polymer of forming identical copolymerization ratio.

Synthesis example 5[PC's (a2) is synthetic]

In synthesis example 4, except polyorganosiloxane compounds being become the polyorganosiloxane compounds (the system X-22-1821 of Shin-Etsu Chemial Co., Ltd) that uses in the synthesis example 1, with the similarly synthetic copolymerization polycarbonate of synthesis example 4.The limiting viscosity of the copolymerization polycarbonate of preparation is 0.29dl/g.The copolymerization polycarbonate that will synthesize later on is abbreviated as PC (a2).Employing infrared absorption spectrum analysis etc. confirms that this polymkeric substance is and the reinforced carbonate polymer of forming identical copolymerization ratio.

Synthesis example 6[PC's (Si) is synthetic]

Bisphenol-A 60kg is dissolved among the 5wt% sodium hydrate aqueous solution 400L.To maintain this aqueous solution of room temperature and import methylene chloride in the tube-type reactor of internal diameter 10mm, pipe range 10m by orifice plate with 138L/ hour flow with 69L/ hour flow, make phosgene and its also flow, be blown into, carry out reaction in 3 hours continuously with 10.7kg/ hour flow.Tube-type reactor used herein is dual pipe, at the partly logical chilled water of chuck, the discharge temperature of reactant liquor is remained on 25 ℃.In addition, modulate and make the pH that discharges liquid be shown as 10～11.The reactant liquor of preparation is like this left standstill, aqueous phase separation is removed, take 220 liters mutually of methylene chloride, obtain object polycarbonate oligomer solution.Oligomer concentrations is 317g/L, and the concentration of chloro-carbonic acid ester group is 0.7N.

After the silicone compounds 40g that will have following structure then is dissolved among the methylene chloride 2L, this lysate is mixed with the polycarbonate oligomer solution 10L of above-mentioned manufacturing.Adding is dissolved into lysate and the triethylamine 5.7cc that obtains among the water 1L with NaOH 56g in this mixed liquor, to stir 1 hour under 300rpm, the room temperature.Then, adding is dissolved into lysate, methylene chloride 8L and the p-tert-butylphenol 96g that obtains among the sodium hydrate aqueous solution 5L of 5.2wt% with bisphenol-A 600g, to stir this potpourri 2 hours under 500rpm, the room temperature.Then, add methylene chloride 5L, the neutralizing treatment of 0.01N sodium hydrate aqueous solution 5L, the acid elution of using 0.1N hydrochloric acid 5L, the washing of water 5L are used in water 5L washing more in order, at last methylene chloride are removed, and obtain the Copolycarbonate of sheet.The viscosity average molecular weigh of this multipolymer is 17000, and silicone compounds unit content is 1wt%.This Copolycarbonate is abbreviated as PC (Si).

The limiting viscosity of this multipolymer is 0.40dl/g.

Silicone resin: have methyl and phenyl as substituent silicone resin (the chemical industry system X-40-9805 of SHIN-ETSU HANTOTAI) with branched structure.Be abbreviated as Si-1 later on.

(composition c)

As composition c, prepare following material.

The carbon nano-tube that CNT: fiber diameter 10nm, the above HyperionCatalysis International company of the long 1 μ m of average fiber make.The common kneader that uses Buss company to make cools off PC (b1) fusion under 270～290 ℃ temperature synthetic in this carbon fiber 15 weight %, the above-mentioned synthesis example 1, mixing back, obtains the masterbatch particle that carbon fiber disperses, and uses in an embodiment.

CB: carbon black (trade name: Ketjenblack EC; Lion Corporation makes, DBP oil absorption: 360ml/100g).

(ingredient d)

As ingredient d, prepare following slaine.

Slaine 1: perfluor fourth sulfonic acid potassium salt (trade name: Megafac F-114P; Big Japanese ink chemical industry (strain) system).

Slaine 2: diphenyl sulfonic acid sulfonic acid potassium salt (UCB makes KSS)

＜embodiment 1～13 〉

Will raw-material (composition a), (composition b), (composition c), (ingredient d) be in the ratio metering shown in table 1-1 and the table 1-2 as above-mentioned, with super mixer will (composition a), after (composition b) and (ingredient d) premixed, append (composition c), with the band exhausr port the 40mm extruder carry out under 270～290 ℃ the temperature fusion, mixing after, obtain particle.This particle after dry 6 hours, in the film like that 300 ℃ of compacted unders are thick 100 μ m, is obtained experimental film with compacting shape machine in 120 ℃ air drier.Use high resistivity meter Hiresta-UP (Mitsubishi Chemical's (strain) system) in volume resistance value, the sheet resistance value of measuring this experimental film of mensuration under the voltage 100V, minute 10 seconds.Anti-flammability VTM test is estimated the anti-flammability of the film like test film (wide 50mm, long 200mm) of thick 100 μ m according to UL-94VTM.

Folding strength is for the film like test film (wide 10mm, long 50mm) of thick 100 μ m, with anti-degree test (the tension force 1.00kg/mm in the wrong of MIT ²) measure, estimate with following benchmark.Its result is shown in table 1-1 and table 1-2 in the lump.

Do not fractureed for A:50000 time.

B:30000 time above, fractureed below 50000 times.

C: less than is fractureed for 30000 times.

Use the resin molding of above-mentioned making, make transfer drum shown in Figure 1.That is,, above-mentioned resin molding in 12,13 stretchings of 2 aluminum drums, is made transfer drum 10 as transfer medium carrying member 11 shown in Figure 1.The both ends of transfer medium carrying member 11 are fixed on the connecting portion 14 of 2 aluminum drums 12,13 that connect and compose transfer drum 10.

In the present embodiment, the diameter of transfer drum 10 is set at 160mm, translational speed is set at 160mm/sec.To also be set at 160mm/sec as the operating speed of the translational speed of photosensitive drums 33 grades simultaneously.In addition, respectively with transfer printing with the wide 19mm that is set at of the opening of corona discharger 21, with the distance setting of the outer peripheral face of discharge metal line 25 and photosensitive drums 33 is 10.5mm, is 16mm with discharge metal line and transfer printing with the distance setting of the division board bottom surface of corona discharger 21.

In addition, as extruded member 27, use the pet resin film.

In the present embodiment, adopt image processing system shown in Figure 3 on electronegative photosensitive drums 33, to form sub-image, use the toner of mean grain size 8 μ m, obtain toner image by discharged-area development.At this moment, toner is made of resin, the adjuvant that is used to improve charged controlled, lubricity etc. of material and other trace, with the carrier particle frictional electrification, becomes electronegative toner in developer.

Then, adopt the transfer device of above-mentioned formation this toner image to be transferred on the transfer materials by positive polarity.With transfer drum 10 transfer materials is separated then, carry out photographic fixing with fuser.

In the present embodiment, adopt cleaning device 35a and cleaning servicing unit 35b that the surface of the transfer medium carrying member 11 of transfer drum 10 is cleaned with polyurethane blade.

Use polychrome electronic photo copy device shown in Figure 3, carry out 20000 image printing durable tests.For the initial stage image and durable after image observe with visual, estimate according to following benchmark.Its result is shown in table 1-1 and table 1-2 in the lump.

A: do not find inhomogeneous.

B: find inhomogeneous.

＜comparative example 1～2 〉

Will (composition a), (composition b), (composition c) or (ingredient d) measure in the ratio shown in the table 2 as raw-material, adopt the method same with the foregoing description 1～13, make each resin molding, measure volume resistance value and sheet resistance value, also carry out anti-flammability VTM test, MIT folding resistant test.In addition, same with the foregoing description, each resin molding that uses this comparative example to make is made transfer drum, and picture characteristics is estimated.The results are shown in table 2.

Table 2

＜embodiment 14～15 〉

Adopting the ultrasonic wave connection is endless belt-shaped with the film forming of embodiment 1,2 preparations, uses image processing system shown in Figure 5 and toner similarly to Example 1 that its image is estimated.

In addition, use above-mentioned polychrome electronic photo copy device, carry out 20000 image printing durable tests.Its result in the early stage image and durable after image on all do not find inhomogeneous.

＜embodiment 16～17 〉

Adopting the ultrasonic wave connection is endless belt-shaped with the film forming that embodiment 1,2 uses, and uses image processing system shown in Figure 7 and toner similarly to Example 1 that its image is estimated.

In addition, use above-mentioned polychrome electronic photo copy device, carry out 20000 image printing durable tests.Its result in the early stage image and durable after image on all do not find inhomogeneous.

Utilizability on the industry

As mentioned above, can provide according to the present invention excellent in flame retardance, film strength height, can obtain Even must be owing to be difficult for producing electrical degradation aspects Reusability do not have that transfer printing is inhomogeneous, the transfer printing deinking yet Etc. transfer medium carrying member or the intermediate transfer member of the good image of defective and use them Image processing system, therefore extremely be suitable for using in the electronic photo field.

Claims (18)

1. transfer medium carrying member, this transfer medium carrying member is used for electro-photography apparatus, it is characterized in that: this transfer medium carrying member contains i) resin and ii) electric conductivity filling agent, this resin contains polycarbonate resin a and the polycarbonate resin b different with this polycarbonate resin a, this polycarbonate resin a has the structural unit that contains siloxane structure and contains fluorene structured structural unit

Wherein, above-mentioned polycarbonate resin a has the structural unit shown in structural unit shown in the following general formula (1) and the following general formula (3):

In the formula (1), R ₁～R ₄Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₅～R ₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₉And R ₁₀Represent singly-bound or C independently of one another _1-6The divalent aliphatic alkyl,

X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another,

In the formula (3), R ₂₅～R ₂₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl,

This polycarbonate resin b has the structural unit shown in structural unit shown in the above-mentioned general formula (1) and the following general formula (2):

In the formula (2), R ₁₅～R ₁₈Be hydrogen, C independently of one another _1-10Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy, C _7-17Aralkyl, Y is -S-,-SO ₂-,-O-,-CO-,-SO-or

Here, R ₁₉～R ₂₄Be hydrogen, C independently of one another _1-10Alkyl, C _2-5Alkenyl, C _1-5Alkoxy or C _6-12Aryl, perhaps represent R ₂₁And R ₂₂And R ₂₃And R ₂₄Combination together forms C _3-12Carbocyclic ring or the group of heterocycle, but do not comprise fluorene structuredly, a represents 0～20 integer.

2. the described transfer medium carrying member of claim 1, wherein, in the above-mentioned formula (1) of above-mentioned polycarbonate resin a, R ₅～R ₈Be methyl or phenyl independently of one another.

3. the described transfer medium carrying member of claim 2, wherein, the structural unit shown in the above-mentioned formula (1) of above-mentioned polycarbonate resin a is at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5):

In above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1).

4. the described transfer medium carrying member of claim 1, wherein, in the above-mentioned formula (1) of above-mentioned polycarbonate resin b, R ₅～R ₈Be methyl or phenyl independently of one another.

5. the described transfer medium carrying member of claim 4, wherein, the structural unit shown in the above-mentioned formula (1) of above-mentioned polycarbonate resin b is at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5):

In above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1).

6. the described transfer medium carrying member of claim 1, wherein, the structural unit shown in the above-mentioned general formula (2) of above-mentioned polycarbonate resin b has the structure shown in the following formula (6):

7. the described transfer medium carrying member of claim 1, it is shaped as sheet.

8. the described transfer medium carrying member of claim 1, it is shaped as the endless belt.

9. electro-photography apparatus, it is characterized in that: possess the described transfer medium carrying member of claim 1, this transfer medium carrying member appendix the transfer materials of the toner image transfer printing of planning to form on the image-carrier and with at least one of the transfer materials of toner image transfer printing.

10. intermediate transfer member, this intermediate transfer member is used for electro-photography apparatus, it is characterized in that: this intermediate transfer member contains i) resin and ii) electric conductivity filling agent, this resin contains polycarbonate resin a and the polycarbonate resin b different with this polycarbonate resin a, this polycarbonate resin a has the structural unit that contains siloxane structure and contains fluorene structured structural unit

Wherein, above-mentioned polycarbonate resin a has the structural unit shown in structural unit shown in the following general formula (1) and the following general formula (3):

In the formula (1), R ₁～R ₄Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₅～R ₈Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₉And R ₁₀Represent singly-bound or C independently of one another _1-6The divalent aliphatic alkyl,

X is singly-bound, from [SiO (R ₁₁) (R ₁₂Structural unit shown in)-], [SiO (R ₁₃) (R ₁₄Structural unit shown in)-] and [SiO (R ₂₉) (R ₃₀The linking group that the polymkeric substance of the linking group that any 1 structural unit of choosing in the structural unit shown in)-] constitutes or at least 1 structural unit choosing from above-mentioned 3 structural units constitutes,

When this linking group was made of the polymkeric substance of 1 structural unit that is selected from above-mentioned 3 structural units at least, the summation of the degree of polymerization was 2～200,

When this linking group was made of the polymkeric substance of 2 structural units that are selected from above-mentioned 3 structural units at least, this polymkeric substance was the segmented copolymer or the random copolymers of each structural unit,

In above-mentioned each structural unit, R ₁₁～R ₁₄, R ₂₉～R ₃₀Be hydrogen, C independently of one another _1-5Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl, R ₁₁And R ₁₂Combination, R ₁₃And R ₁₄Combination and R ₂₉And R ₃₀Combination differ from one another,

In the formula (3), R ₂₅～R ₂₈Be hydrogen, C independently of one another _1-15Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy or C _7-17Aralkyl,

This polycarbonate resin b has the structural unit shown in structural unit shown in the above-mentioned general formula (1) and the following general formula (2):

In the formula (2), R ₁₅～R ₁₈Be hydrogen, C independently of one another _1-10Alkyl, C _6-12Aryl, C _2-5Alkenyl, C _1-5Alkoxy, C _7-17Aralkyl, Y is

-S-,-SO ₂-,-O-,-CO-,-SO-or

Here, R ₁₉～R ₂₄Be hydrogen, C independently of one another _1-10Alkyl, C _2-5Alkenyl, C _1-5Alkoxy or C _6-12Aryl, perhaps represent R ₂₁And R ₂₂And R ₂₃And R ₂₄Combination together forms C _3-12Carbocyclic ring or the group of heterocycle, but do not comprise fluorene structuredly, a represents 0～20 integer.

11. the described intermediate transfer member of claim 10, wherein, in the above-mentioned formula (1) of above-mentioned polycarbonate resin a, R ₅～R ₈Be methyl or phenyl independently of one another.

12. the described intermediate transfer member of claim 11, wherein, the structural unit shown in the above-mentioned formula (1) of above-mentioned polycarbonate resin a is at least 1 of structure shown in structure shown in the following formula (4) and the following formula (5):

In above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1).

13. the described intermediate transfer member of claim 10, wherein, in the above-mentioned formula (1) of above-mentioned polycarbonate resin b, R ₅～R ₈Be methyl or phenyl independently of one another.

14. the described intermediate transfer member of claim 13, wherein, the structural unit shown in the above-mentioned formula (1) of above-mentioned polycarbonate resin b is at least 1 of the structure shown in structure shown in the following formula (4) and the following formula (5):

In above-mentioned formula (4) and (5), the X synonym in X and the above-mentioned formula (1).

15. the described intermediate transfer member of claim 10, wherein, the structural unit shown in the above-mentioned general formula (2) of above-mentioned polycarbonate resin b has the structure shown in the following formula (6):

16. the described intermediate transfer member of claim 10, it is shaped as sheet.

17. the described intermediate transfer member of claim 10, it is shaped as the endless belt.

18. electro-photography apparatus is characterized in that: possess the toner image transfer printing that to form on the image-carrier, the toner image of this transfer printing is transferred to the described intermediate transfer member of claim 10 on the transfer materials.

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