JP5956391B2 - Curable composition for fixing member and fixing member using the same - Google Patents

Description

  The present invention relates to a curable composition for a fixing member and a fixing member such as a fixing roll and a fixing belt used in an image forming apparatus such as an electrophotographic copying machine, a facsimile, and a printer using the same.

  Conventionally, as a fixing roll or a fixing belt used in an image forming apparatus, a surface of a metal or heat resistant resin base material is coated with a fluororesin in order to impart toner releasability. What was baked was known (patent documents 1 and 2).

  However, since the fluororesin is very hard, for example, when the recording paper on which the toner is transferred is passed through a fixing belt having a fluororesin layer as a surface layer, the toner is crushed by its rigidity, and the image on the recording paper There was a problem that the resolution of.

  Therefore, if silicone rubber or the like that does not have rigidity problems is used instead of fluororesin, the toner releasability is not sufficient, and the toner on the recording paper moves onto the fixing member, resulting in a problem that the resolution is lowered. It was.

  As a means to solve these problems, a silicone rubber layer is provided between a metal or heat-resistant resin base material and the fluororesin layer to reduce the rigidity of the fluororesin layer, so that the toner is crushed. Thus, methods for preventing the resolution from being lowered have been proposed (Patent Documents 3 and 4).

  However, in the fixing member having the above configuration, since two layers of a silicone rubber layer and a fluororesin layer are formed on a metal or heat resistant resin base material, the time and cost required for the production increase. was there.

  Therefore, there has been a demand for the appearance of a material having no problem of rigidity and good toner releasability. If the role of the two layers of the silicone rubber layer and the fluororesin layer can be fulfilled in one layer, a significant improvement in productivity can be expected.

  Furthermore, some recent image forming apparatuses incorporate an optical member. In this case, the material forming the surface layer of the fixing member is required to have good transparency so as not to prevent light transmission. It was. For example, some image forming apparatuses may detect the position and density of a toner image on the fixing member using a light reflection sensor, and the material forming the surface layer of the fixing member has light absorption. As a result, the detection accuracy of the sensor is reduced.

  By the way, conventionally, as a curable composition, a linear fluoropolyether compound having at least two alkenyl groups in one molecule and a perfluoropolyether structure in the main chain, silicon atoms in one molecule From a composition comprising a fluorine-containing organohydrogensiloxane having two or more hydrogen atoms directly connected to a platinum group compound and heat resistance, chemical resistance, solvent resistance, mold release, water repellency, oil repellency, low temperature characteristics, etc. It has been proposed that a cured product having excellent balance of properties can be obtained (Patent Document 5).

  And the hardened | cured material which provided self-adhesiveness with respect to a metal or a plastic base material is obtained by adding the organopolysiloxane which has a hydrosilyl group, an epoxy group, and / or trialkoxysilyl group to this composition. (Patent Document 6).

  However, when a cured product obtained by curing the curable composition having self-adhesiveness is used as a material for forming the surface layer of the fixing member, there is no problem of rigidity and toner releasability is also good. However, because the release property of the cured product with respect to the recording paper on which the toner image is formed (hereinafter referred to as “recording paper release property”) is insufficient, the recording paper does not peel from the cured product, As a result, the problem of causing paper jams often occurred.

  Further, the cured product may be insufficient in transparency, and the detection accuracy of the light reflection sensor may be lowered.

Japanese Patent Laid-Open No. 10-142990 Japanese Patent Laid-Open No. 10-186923 Japanese Patent No. 3051085 JP 2002-169394 A Japanese Patent No. 2990646 Japanese Patent No. 3329717

  The present invention has been made in view of the above circumstances, and provides a curable composition for a fixing member that gives a cured product having good recording paper releasability and transparency, and a fixing member having the cured product as a surface layer. Objective.

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１は水素原子、又は非置換もしくは置換の１価炭化水素基）のいずれかで表される基、Ｘ’は−ＣＨ_２−、−ＯＣＨ_２−、−ＣＨ_２ＯＣＨ_２−、及び−ＣＯ−ＮＲ^１−Ｙ’−（Ｙ’は−ＣＨ_２−又は下記構造式（３）

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１は上記と同じ基である。）のいずれかで表される基であり、ａは独立に０又は１である。Ｒｆ^１は下記一般式（４）又は（５）

（式中、ｐ及びｑはそれぞれ１〜１５０の整数であって、かつｐとｑの和の平均は２〜３００である。また、ｒは０〜６の整数、ｔは２又は３である。）

（式中、ｕは１〜３００の整数、ｓは１〜８０の整数であって、かつｕとｓの和の平均は２〜３８０である。また、ｔは上記と同じである。）
で表される２価のパーフルオロポリエーテル基である。］
で表される直鎖状ポリフルオロ化合物：１００質量部、
（Ｂ）下記一般式（６）で表される、一分子中にケイ素原子に直結した水素原子と、ケイ素原子、酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基とを有するオルガノ水素シロキサン、

（式中、Ｊは、酸素原子、アルキレン基、又は、酸素原子若しくは窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した２価のパーフルオロアルキレン基若しくは２価のパーフルオロオキシアルキレン基であり、Ｇは、独立して、ケイ素原子、酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基であり、Ｒ^２は独立して置換又は非置換の１価の炭化水素基である。また、ｓ’は０又は１〜３の整数、ｔ’は０又は１〜３の整数、ｓ’＋ｔ’は１〜５の整数である。）
（Ｃ）白金族金属系触媒：白金族金属原子換算で０．１０〜５００ｐｐｍ、
（Ｄ）下記一般式（７）で表される、一分子中にケイ素原子に直結した水素原子と、酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基と、酸素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合したエポキシ基及び／又はトリアルコキシシリル基を有する環状オルガノポリシロキサン：０．１０〜１０．０質量部、

（式中、ｉは１〜６の整数、ｊは１〜４の整数、ｋは１〜４の整数、ｉ＋ｊ＋ｋは４〜１０の整数、Ｒ^３は置換又は非置換の１価炭化水素基、Ｄは酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基、Ｅは酸素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合したエポキシ基及び／又はトリアルコキシシリル基である。ただし、−（ＳｉＯ）（Ｈ）Ｒ^３−、−（ＳｉＯ）（Ｄ）Ｒ^３−及び−（ＳｉＯ）（Ｅ）Ｒ^３−の結合の順番は限定されない。）
（Ｅ）下記一般式（８）で表される、一分子中にケイ素原子に直結した水素原子と、酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基と、２価の炭化水素基を介してケイ素原子に結合した環状無水カルボン酸残基とを有する環状オルガノポリシロキサン：０．０１０〜１０．０質量部、

（式中、ｘは１〜６の整数、ｙは１〜４の整数、ｚは１〜４の整数、ｘ＋ｙ＋ｚは４〜１０の整数、Ｒ^４は置換又は非置換の１価炭化水素基、Ｓは酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基、Ｔは２価の炭化水素基を介してケイ素原子に結合した環状無水カルボン酸残基である。ただし、−（ＳｉＯ）（Ｈ）Ｒ^４−、−（ＳｉＯ）（Ｓ）Ｒ^４−及び−（ＳｉＯ）（Ｔ）Ｒ^４−の結合の順番は限定されない。）
を含有する定着部材用硬化性組成物であって、
前記（Ｂ）成分の配合量は、該組成物中に含まれるアルケニル基１モルに対して、前記（Ｂ）成分中のケイ素原子に直結した水素原子（ＳｉＨ基）が０．５０〜２．０モルとなる量であり、
前記定着部材用硬化性組成物を硬化して得られる２ｍｍ厚の硬化物の、ＪＩＳ Ｋ７３６１−１に準じて測定される全光線透過率が８０％以上となるものであること
を特徴とする定着部材用硬化性組成物を提供する。 In order to solve the above problems, according to the present invention,
(A) The following general formula (1)
_{CH 2 = CH- (X) a} -Rf 1 - (X ') a -CH = CH 2 (1)
[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 -, and ^-Y-NR 1 -CO- (Y is -CH ₂ - or the following structural formula (2)

O, m or p-dimethylsilylphenylene group represented by the formula: R ¹ is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group), X ′ is —CH ₂ —, — OCH ₂ —, —CH ₂ OCH ₂ —, and —CO—NR ¹ —Y′— (where Y ′ is —CH ₂ — or the following structural formula (3)

O, m or p-dimethylsilylphenylene group represented by the above, R ¹ is the same group as described above. ), And a is independently 0 or 1. Rf ¹ represents the following general formula (4) or (5)

(Wherein p and q are each an integer of 1 to 150, and the average of the sum of p and q is 2 to 300. Also, r is an integer of 0 to 6 and t is 2 or 3. .)

(In the formula, u is an integer of 1 to 300, s is an integer of 1 to 80, and the average of the sum of u and s is 2 to 380. t is the same as above.)
It is a bivalent perfluoropolyether group represented by these. ]
Linear polyfluoro compound represented by: 100 parts by mass,
(B) A silicon atom via a hydrogen atom directly connected to a silicon atom and a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom, represented by the following general formula (6) An organohydrogensiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to

(In the formula, J represents an oxygen atom, an alkylene group, a divalent perfluoroalkylene group or a divalent perfluoroalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom. A fluorooxyalkylene group, and G is independently a monovalent perfluoroalkyl group or a monovalent group bonded to a silicon atom via a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom. R ² is independently a substituted or unsubstituted monovalent hydrocarbon group, s ′ is an integer of 0 or 1 to 3, t ′ is 0 or 1 to 3 S ′ + t ′ is an integer of 1 to 5.)
(C) Platinum group metal catalyst: 0.10 to 500 ppm in terms of platinum group metal atom,
(D) Bonded to a silicon atom via a hydrogen atom directly bonded to a silicon atom in one molecule and a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom, represented by the following general formula (7) Cyclic having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group and an epoxy group and / or trialkoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom Organopolysiloxane: 0.10 to 10.0 parts by mass,

(Wherein i is an integer of 1 to 6, j is an integer of 1 to 4, k is an integer of 1 to 4, i + j + k is an integer of 4 to 10, R ³ is a substituted or unsubstituted monovalent hydrocarbon group, D is a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and E may contain an oxygen atom An epoxy group and / or trialkoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group, provided that — (SiO) (H) R ³ —, — (SiO) (D) R ³ — and The order of bonding of — (SiO) (E) R ³ — is not limited.)
(E) Bound to a silicon atom through a hydrogen atom directly bonded to a silicon atom in one molecule and a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom, represented by the following general formula (8) Cyclic organopolysiloxane having a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group and a cyclic carboxylic anhydride residue bonded to a silicon atom via a divalent hydrocarbon group: 0.010 10.0 parts by mass,

(Wherein x is an integer of 1 to 6, y is an integer of 1 to 4, z is an integer of 1 to 4, x + y + z is an integer of 4 to 10, R ⁴ is a substituted or unsubstituted monovalent hydrocarbon group, S is a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and T is a divalent hydrocarbon group A cyclic carboxylic anhydride residue bonded to a silicon atom via a —, — (SiO) (H) R ⁴ —, — (SiO) (S) R ⁴ — and — (SiO) (T) R ⁴ The order of bonding of-is not limited.)
A curable composition for a fixing member containing
The blending amount of the component (B) is such that the hydrogen atom (SiH group) directly bonded to the silicon atom in the component (B) is 0.50 to 2.1 mol with respect to 1 mol of the alkenyl group contained in the composition. The amount to be 0 mole,
Fixing characterized in that a 2 mm thick cured product obtained by curing the curable composition for a fixing member has a total light transmittance of 80% or more measured according to JIS K7361-1. A curable composition for a member is provided.

  Curing for a fixing member, which is a thermosetting fluoropolyether adhesive composition containing all of the above components (A) to (E) and having a total light transmittance of a cured product having a thickness of 2 mm satisfying the above range. If it is an adhesive composition, it has good recording paper releasability and transparency. Therefore, the cured product of the curable composition for a fixing member is suitable as a material for forming the surface layer of the fixing member such as a fixing roll or a fixing belt used in the image forming apparatus.

（式中、ｌは１〜４の整数、ｍは３〜６の整数、ｌ＋ｍは４〜１０の整数、Ｒ^５は置換又は非置換の１価炭化水素基、Ｌは酸素原子又は窒素原子を含んでも良い２価の炭化水素基を介してケイ素原子に結合した１価のパーフルオロアルキル基又は１価のパーフルオロオキシアルキル基、Ｍはケイ素原子に直結した１価の不飽和炭化水素基である。ただし、−（ＳｉＯ）（Ｌ）Ｒ^５−及び−（ＳｉＯ）（Ｍ）Ｒ^５−の結合の順番は限定されない。）
を含み、
前記（Ｂ）成分の配合量は、前記（Ａ）成分のアルケニル基と（Ｆ）成分の１価の不飽和炭化水素基の合計１モルに対して、前記（Ｂ）成分中のケイ素原子に直結した水素原子（ＳｉＨ基）が０．５０〜２．０モルとなる量であるものを含有することが好ましい。 Furthermore, as the component (F), a divalent carbon atom represented by the following general formula (9), which may contain a monovalent unsaturated hydrocarbon group directly bonded to a silicon atom in one molecule, and an oxygen atom or a nitrogen atom. Cyclic organopolysiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom via a hydrogen group: 0.10 to 70.0 parts by mass,

Wherein l is an integer of 1 to 4, m is an integer of 3 to 6, l + m is an integer of 4 to 10, R ⁵ is a substituted or unsubstituted monovalent hydrocarbon group, L is an oxygen atom or a nitrogen atom A monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may be contained, M is a monovalent unsaturated hydrocarbon group directly bonded to the silicon atom However, the order of bonding of — (SiO) (L) R ⁵ — and — (SiO) (M) R ⁵ — is not limited.)
Including
The blending amount of the component (B) is based on the silicon atoms in the component (B) with respect to a total of 1 mol of the alkenyl group of the component (A) and the monovalent unsaturated hydrocarbon group of the component (F). It is preferable to contain a hydrogen atom (SiH group) directly connected in an amount of 0.50 to 2.0 mol.

  Such a curable composition for a fixing member containing the component (F) and the components (A) to (E) gives a cured product having even better recording paper releasability. Accordingly, the cured product of the curable composition for a fixing member is suitable as a material for forming the surface layer of the fixing member.

  Moreover, it is preferable that the viscosity at 23 degreeC prescribed | regulated to JISK7117-1 of the said curable composition for fixing members is 100-50,000 mPa * s.

  Thus, if the viscosity is 100 mPa · s or more, the fluidity is not too high, and the composition can be uniformly applied to the surface of the base material of the fixing member, and is preferably 50,000 mPa · s or less. If present, the leveling property is excellent, and it is easy to uniformly apply the composition to the surface of the base material of the fixing member for an image forming apparatus, which is preferable.

［式中、Ｘ、Ｘ’は上記と同様である。また、ａ’は独立に０又は１、ｂ’及びｄ’はそれぞれ１〜１５０の整数、ｂ’とｄ’の和の平均は２〜３００、ｅ’は２〜６の整数である。］ Moreover, it is preferable that the said (A) component is what is represented by following General formula (10).

[Wherein, X and X ′ are the same as described above. A ′ is independently 0 or 1, b ′ and d ′ are each an integer of 1 to 150, the average of the sum of b ′ and d ′ is 2 to 300, and e ′ is an integer of 2 to 6. ]

  Such a compound is still more preferable as a linear polyfluoro compound.

  Moreover, it is preferable that alkenyl group content of the linear polyfluoro compound of the said (A) component is 0.0050-0.100 mol / 100g.

  Thus, when the alkenyl group content of the component (A) is 0.0050 mol / 100 g or more, it is preferable because the degree of crosslinking is sufficient and there is no risk of curing failure, and the alkenyl group content is 0.100 mol. / 100 g or less is preferred because there is no fear of the mechanical properties of the cured product as a rubber elastic body being impaired.

（式中、ｇは１〜１０の整数である） In addition, the monovalent perfluoroalkyl group or the monovalent perfluorooxyalkyl group included in the component (B), the component (D), the component (E), and the component (F) is represented by the following general formula (11) or It is preferable that it is what is represented by General formula (12).
C _f F _{2f + 1} − (11)
(In the formula, f is an integer of 1 to 10.)

(Wherein g is an integer of 1 to 10)

  Thus, it is preferable that the monovalent perfluoroalkyl group or the monovalent perfluorooxyalkyl group is represented by the general formula (11) or the general formula (12).

  In addition, the present invention provides a fixing member for an image forming apparatus having a cured layer obtained by curing the curable composition for a fixing member as a surface layer.

  As described above, a cured product obtained by curing the composition of the present invention has good recording paper releasability and transparency. Therefore, the fixing member having the cured product as a surface layer forms a toner image. Even if the printed recording paper is passed, the frequency of paper jamming is low, and it may cause problems of optical members such as the detection accuracy of the optical sensor that detects the position and density of the image on the fixing member. It is preferable because it is not. In addition, since only one layer is required as compared with the conventional means in which the surface layer material is a two-layered silicone rubber layer and a fluororesin layer, it is possible to reduce the time and cost required for manufacturing the fixing member, and to improve productivity. Can be improved.

  The fixing member for the image forming apparatus is preferably used for a fixing roll or a fixing belt of the image forming apparatus.

  As described above, the fixing member for an image forming apparatus of the present invention is particularly suitable for use in a fixing roll or a fixing belt of the image forming apparatus.

  The curable composition for sealing an optical semiconductor of the present invention combines the above components (A) to (E) and, if necessary, the component (F), so that the cured product has good recording paper release properties and transparency. Therefore, a fixing member such as a fixing roll or a fixing belt having the cured product as a surface layer is less likely to cause a paper jam even when a recording paper on which a toner image is formed passes, and detection accuracy of a light reflection sensor. Inferiority of the optical member, such as lowering, is not caused.

Hereinafter, the present invention will be described in more detail.
As described above, a thermosetting fluoropolyether-based adhesive composition that gives a cured product having good recording paper releasability and transparency, and a cured product obtained by curing the composition as a surface layer, There is a demand for fixing members such as fixing rolls and fixing belts used in image forming apparatuses.

  As a result of intensive investigations to achieve the above object, the present inventors consisted of a composition containing the following components (A) to (E) and further a component (F), and cured the composition. If the total light transmittance measured according to JIS K7361-1 of the 2 mm-thick cured product is 80% or more, the following (A) to (E) components, and further, if necessary, the (F) component As a result of the combination of the above, it has been found that a curable composition for a fixing member, which is a thermosetting fluoropolyether adhesive composition that gives a cured product having good recording paper releasability and transparency, is obtained. It came to complete. Hereinafter, the present invention will be described in detail. In the present specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１は水素原子、又は非置換もしくは置換の１価炭化水素基）のいずれかで表される基、Ｘ’は−ＣＨ_２−、−ＯＣＨ_２−、−ＣＨ_２ＯＣＨ_２−、及び−ＣＯ−ＮＲ^１−Ｙ’−（Ｙ’は−ＣＨ_２−又は下記構造式（３）

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１は上記と同じ基である。）のいずれかで表される基であり、ａは独立に０又は１である。Ｒｆ^１は下記一般式（４）又は（５）

（式中、ｐ及びｑはそれぞれ１〜１５０の整数であって、かつｐとｑの和の平均は２〜３００である。また、ｒは０〜６の整数、ｔは２又は３である。）

（式中、ｕは１〜３００の整数、ｓは１〜８０の整数であって、かつｕとｓの和の平均は２〜３８０である。また、ｔは上記と同じである。）
で表される２価のパーフルオロポリエーテル基である。］ [(A) component]
The component (A) of the present invention is a linear polyfluoro compound represented by the following general formula (1).
_{CH 2 = CH- (X) a} -Rf 1 - (X ') a -CH = CH 2 (1)
[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 -, and ^-Y-NR 1 -CO- (Y is -CH ₂ - or the following structural formula (2)

O, m or p-dimethylsilylphenylene group represented by the formula: R ¹ is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group), X ′ is —CH ₂ —, — OCH ₂ —, —CH ₂ OCH ₂ —, and —CO—NR ¹ —Y′— (where Y ′ is —CH ₂ — or the following structural formula (3)

O, m or p-dimethylsilylphenylene group represented by the above, R ¹ is the same group as described above. ), And a is independently 0 or 1. Rf ¹ represents the following general formula (4) or (5)

(Wherein p and q are each an integer of 1 to 150, and the average of the sum of p and q is 2 to 300. Also, r is an integer of 0 to 6 and t is 2 or 3. .)

(In the formula, u is an integer of 1 to 300, s is an integer of 1 to 80, and the average of the sum of u and s is 2 to 380. t is the same as above.)
It is a bivalent perfluoropolyether group represented by these. ]

Here, as R ¹ , in the case of other than a hydrogen atom, a monovalent hydrocarbon group having 1 to 12 carbon atoms, particularly 1 to 10 carbon atoms, is preferable. Alkyl groups such as hexyl group, cyclohexyl group and octyl group; aryl groups such as phenyl group and tolyl group; aralkyl groups such as benzyl group and phenylethyl group; and some or all of hydrogen atoms of these groups are fluorine. And a substituted monovalent hydrocarbon group substituted with a halogen atom such as.

（式中、ｐ及びｑはそれぞれ１〜１５０の整数、好ましくは１〜１００の整数であって、かつｐとｑの和の平均は２〜３００、好ましくは２〜２００、より好ましくは１０〜１５０である。また、ｒは０〜６の整数、ｔは２又は３である。）

（式中、ｕは１〜３００の整数、好ましくは１〜２００の整数、より好ましくは１０〜１５０の整数であり、ｓは１〜８０の整数、好ましくは１〜５０の整数、より好ましくは１〜３０の整数であり、かつｕとｓの和の平均は２〜３８０、好ましくは２〜２５０、より好ましくは１０〜１８０である。また、ｔは上記と同じである。） Rf ^{1 in the} general formula (1) is a divalent perfluoropolyether structure represented by the following general formula (4) or (5).

(Wherein p and q are each an integer of 1 to 150, preferably an integer of 1 to 100, and the average of the sum of p and q is 2 to 300, preferably 2 to 200, more preferably 10 to 10) 150. Also, r is an integer of 0 to 6, and t is 2 or 3.)

(In the formula, u is an integer of 1 to 300, preferably an integer of 1 to 200, more preferably an integer of 10 to 150, and s is an integer of 1 to 80, preferably an integer of 1 to 50, more preferably. And an average of the sum of u and s is 2-380, preferably 2-250, more preferably 10-180, and t is the same as above.

（上記式（ｉ），（ｉｉ）中、ｐ’及びｑ’はそれぞれ１〜１５０の整数、好ましくは１〜１００の整数、ｐ’とｑ’の和の平均は２〜３００、好ましくは２〜２００、より好ましくは１０〜１５０である。）

（上記式（ｉｉｉ）中、ｕ’は１〜３００の整数、好ましくは１〜２００の整数、より好ましくは１０〜１５０の整数であり、ｖ’は１〜８０の整数、好ましくは１〜５０の整数、より好ましくは１〜３０の整数であり、ｕ’とｖ’の和の平均は２〜３８０、好ましくは２〜２５０、より好ましくは１０〜１８０である。） Preferable examples of the Rf ¹ group include those represented by the following formulas (i) to (iii). More preferred is a divalent group having the structure of formula (i).

(In the above formulas (i) and (ii), p ′ and q ′ are each an integer of 1 to 150, preferably an integer of 1 to 100, and the average of the sum of p ′ and q ′ is 2 to 300, preferably 2) -200, more preferably 10-150.)

(In the above formula (iii), u ′ is an integer of 1 to 300, preferably an integer of 1 to 200, more preferably an integer of 10 to 150, and v ′ is an integer of 1 to 80, preferably 1 to 50. The average of the sum of u ′ and v ′ is 2-380, preferably 2-250, more preferably 10-180.

［式中、Ｘは−ＣＨ_２−、−ＣＨ_２Ｏ−、−ＣＨ_２ＯＣＨ_２−又は−Ｙ−ＮＲ^１’−ＣＯ−（Ｙは−ＣＨ_２−又は下記構造式（２）

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１’は水素原子、メチル基、フェニル基又はアリル基等の置換又は非置換の１価炭化水素基）で表される基、Ｘ’は−ＣＨ_２−、−ＯＣＨ_２−、−ＣＨ_２ＯＣＨ_２−又は−ＣＯ−ＮＲ^１’−Ｙ’−（Ｙ’は−ＣＨ_２−又は下記構造式（３）

で示されるｏ，ｍ又はｐ−ジメチルシリルフェニレン基、Ｒ^１’は上記と同じである。）で表される基であり、ａ’は独立に０又は１、ｅ’は２〜６の整数、ｂ’及びｄ’はそれぞれ１〜１５０の整数、好ましくは１〜１００の整数であり、ｂ’とｄ’の和の平均は２〜３００、好ましくは２〜２００、より好ましくは１０〜１５０である。］ (A) As a preferable example of a component, the compound represented by following General formula (10) is mentioned.

[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 - or -Y-NR ¹ '-CO- (Y is -CH ₂ - or the following structural formula (2)

O, m or p-dimethylsilylphenylene group represented by the formula: R ¹ ′ represents a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group such as a methyl group, a phenyl group or an allyl group), X ′ Is —CH ₂ —, —OCH ₂ —, —CH ₂ OCH ₂ — or —CO—NR ¹ ′ —Y′— (Y ′ is —CH ₂ — or the following structural formula (3)

O, m or p-dimethylsilylphenylene group, R ¹ ′ represented by the above formula is the same as above. A ′ is independently 0 or 1, e ′ is an integer of 2 to 6, b ′ and d ′ are each an integer of 1 to 150, preferably an integer of 1 to 100, The average of the sum of b ′ and d ′ is 2 to 300, preferably 2 to 200, more preferably 10 to 150. ]

Specific examples of the linear polyfluoro compound represented by the general formula (10) include those represented by the following formula.

  (In the formula, m1 and n1 each represent an integer of 1 to 150, preferably an integer of 1 to 100, and m1 + n1 = 2 to 300, preferably 6 to 200).

  The alkenyl group content contained in the linear fluoropolyether compound represented by the general formula (1) is preferably 0.0050 to 0.100 mol / 100 g, more preferably 0.0060 to 0.050 mol / 100 g. When the alkenyl group content contained in the linear polyfluoro compound is 0.0050 mol / 100 g or more, it is preferable because the degree of crosslinking is sufficient and there is no possibility of causing a curing failure. The alkenyl group content is preferably 0.100 mol / When it is 100 g or less, the mechanical properties of the cured product as a rubber elastic body are not likely to be impaired, which is preferable.

  Moreover, the viscosity (23 degreeC) of the linear polyfluoro compound represented by the said General formula (1) is a viscosity measurement prescribed | regulated to JISK7117-1, and is 100-100,000 mPa * s, More preferably, it is 500. It is desirable to use the composition of the present invention as a curable composition for a fixing member within the range of ˜50,000 mPa · s.

  These linear polyfluoro compounds can be used singly or in combination of two or more.

[Component (B)]
The component (B) is represented by the following general formula (6), a hydrogen atom directly connected to a silicon atom in one molecule and a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom. An organohydrogensiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom, and functions as a crosslinking agent for the component (A). The component (B) also plays a role of imparting good recording paper releasability to a cured product obtained by curing the composition of the present invention.

  In the general formula (6), s ′ is an integer of 0 or 1 to 3, t ′ is an integer of 0 or 1 to 3, and s ′ + t ′ is an integer of 1 to 5.

R ² is independently a substituted or unsubstituted monovalent hydrocarbon group, and examples thereof include the same groups as the substituted or unsubstituted monovalent hydrocarbon group of R ¹ described above.

  Furthermore, J is an oxygen atom, an alkylene group, or a divalent perfluoroalkylene group or a divalent perfluorooxyalkylene bonded to a silicon atom via a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom. It is a group.

  G is independently a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl bonded to a silicon atom via a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom. It is a group. G is a group introduced from the viewpoint of compatibility with the component (A), dispersibility, uniformity after curing, and the like.

（式中、ｇは１〜１０の整数、好ましくは２〜８の整数である） Examples of the monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group of G include groups represented by the following general formulas (11) and (12).
C _f F _{2f + 1} − (11)
(In the formula, f is an integer of 1 to 10, preferably an integer of 3 to 7.)

(Wherein g is an integer of 1 to 10, preferably an integer of 2 to 8)

（式中、ｈ’及びｉ’はそれぞれ１以上の整数、好ましくは１〜２０の整数、ｈ’とｉ’の和の平均は２〜４０、好ましくは２〜２０である。）
−ＣＦ_２Ｏ−（ＣＦ_２ＣＦ_２Ｏ）_ｊ’（ＣＦ_２Ｏ）_ｋ‘−ＣＦ_２− （４５）
（式中、ｊ’及びｋ’はそれぞれ１以上の整数、好ましくは１〜２０の整数、ｊ’及びｋ’の和の平均は２〜４０、好ましくは２〜２０である。） In addition, examples of the divalent perfluoroalkylene group or the divalent perfluorooxyalkylene group of J include groups represented by the following general formulas (43) to (45).
-C _{g '} F _2g' -(43)
(In the formula, g ′ is an integer of 1 to 20, preferably an integer of 2 to 10.)

(In the formula, h ′ and i ′ are each an integer of 1 or more, preferably an integer of 1 to 20, and the average of the sum of h ′ and i ′ is 2 to 40, preferably 2 to 20.)
—CF ₂ O— (CF ₂ CF ₂ O) _{j ′} (CF ₂ O) _{k ′} —CF ₂ — (45)
(Wherein j ′ and k ′ are each an integer of 1 or more, preferably an integer of 1 to 20, and the average of the sum of j ′ and k ′ is 2 to 40, preferably 2 to 20.)

等が挙げられる。 Furthermore, as a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom, which connects the monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group represented by G and a silicon atom, Includes an alkylene group having 2 to 12 carbon atoms, or a group in which an ether bond, a silicon atom, an amide bond, a divalent aromatic hydrocarbon group, a carbonyl bond or the like is interposed in the group. Is

Etc.

In addition, the divalent perfluoroalkylene group represented by J or the divalent perfluorooxyalkylene group and the divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and a silicon atom may be carbon. Examples include an alkylene group having 2 to 12 atoms, or a group in which an ether bond, oxygen atom, amide bond, carbonyl bond or the like is interposed in the group.
-CH ₂ CH ₂ -,
-CH ₂ CH ₂ CH ₂ -,
_{-CH 2 CH 2 CH 2 OCH 2} -,
_{-CH 2 CH 2 CH 2 -NH-} CO-,
_{-CH 2 CH 2 CH 2 -N (} Ph) -CO- ( where, Ph is a phenyl group.),
_{-CH 2 CH 2 CH 2 -N (} CH 3) -CO-,
—CH ₂ CH ₂ CH ₂ —O—CO—
Etc.

  Examples of such component (B) include the following compounds. In the following formulae, Me represents a methyl group.

  This (B) component may be used individually by 1 type, and may use 2 or more types together. The blending amount of the component (B) is such that the hydrogen atom (SiH group) directly connected to the silicon atom in the component (B) is 0.50 to 1 mol of the alkenyl group contained in the composition of the present invention. The amount is 2.0 mol, more preferably 0.70 to 1.6 mol. However, when the component (F) described later is blended, the SiH group is 0 with respect to a total of 1 mol of the alkenyl group of the component (A) and the monovalent unsaturated hydrocarbon group of the component (F). .50 to 2.0 mol, more preferably 0.70 to 1.6 mol. If the SiH group is less than 0.50 mol, the degree of crosslinking becomes insufficient, while if it exceeds 2.0 mol, the storage stability may be impaired or the heat resistance of the cured product obtained after curing may be reduced. There is.

[Component (C)]
The platinum group metal catalyst which is the component (C) of the present invention is a hydrosilylation reaction catalyst. The hydrosilylation reaction catalyst comprises an alkenyl group contained in the composition, particularly an alkenyl group in component (A) and an unsaturated hydrocarbon group in component (F), and an SiH group contained in the composition, particularly Is a catalyst that promotes the addition reaction with SiH groups in component (B). This hydrosilylation reaction catalyst is generally a noble metal or a compound thereof and is expensive, and thus platinum or platinum compounds that are relatively easily available are often used.

Examples of the platinum compound include chloroplatinic acid or a complex of chloroplatinic acid and an olefin such as ethylene, a complex of alcohol or vinylsiloxane, metal platinum supported on silica, alumina, carbon, or the like. Rhodium, ruthenium, iridium and palladium compounds are also known as platinum group metal catalysts other than platinum or its compounds. For example, RhCl (PPh ₃ ) ₃ , RhCl (CO) (PPh ₃ ) ₂ , Ru ₃ ( CO) ₁₂ , IrCl (CO) (PPh ₃ ) ₂ , Pd (PPh ₃ ) _{4 and the} like can be exemplified. In the above formula, Ph is a phenyl group.

  When these catalysts are used, they can be used in a solid state when they are solid catalysts, but in order to obtain a more uniform cured product, chloroplatinic acid or a complex such as toluene or ethanol is used. It is preferable to use what was melt | dissolved in the appropriate solvent of (A), making it compatible with the linear polyfluoro compound of (A) component.

  The amount of component (C) is an effective amount as a hydrosilylation reaction catalyst, and is preferably 0.10 to 500 ppm, particularly preferably 0.50 to 200 ppm (in terms of mass of platinum group metal atoms) relative to component (A). However, it can be appropriately increased or decreased depending on the desired curing rate.

[(D) component]
The component (D) of the present invention is represented by the following general formula (7): a hydrogen atom directly connected to a silicon atom in one molecule and a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom. And a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom, and an epoxy group and / or trimethyl bonded to the silicon atom via a divalent hydrocarbon group which may contain an oxygen atom. It is a cyclic organopolysiloxane having an alkoxysilyl group, and is an adhesion-imparting agent that gives self-adhesion to a cured product obtained by curing the composition of the present invention.

In the general formula (7), i is an integer of 1 to 6, preferably an integer of 2 to 5, j is an integer of 1 to 4, preferably an integer of 1 to 3, and k is an integer of 1 to 4, preferably An integer of 1 to 3, i + j + k is an integer of 4 to 10, preferably an integer of 4 to 8. However, the order of bonding of — (SiO) (H) R ³ —, — (SiO) (D) R ³ —, and — (SiO) (E) R ³ — is not limited.

R ³ is independently a substituted or unsubstituted monovalent hydrocarbon group, and examples thereof include the same groups as the substituted or unsubstituted monovalent hydrocarbon group of R ¹ described above.

  D is a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom. Examples of the divalent hydrocarbon group include the same groups as those used in the above-mentioned J. Examples of the monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group include the above-described G And the same groups as those used in the above. These are groups introduced from the viewpoints of compatibility with the component (A), dispersibility, uniformity after curing, and the like.

（式中、Ｒ^６は酸素原子が介在してもよい炭素原子数１〜１０、特に１〜５の２価炭化水素基で、具体的には、メチレン基、エチレン基、プロピレン基、ブチレン基、ヘキシレン基、オクチレン基等のアルキレン基、シクロへキシレン基等のシクロアルキレン基、オキシエチレン基、オキシプロピレン基、オキシブチレン基等のオキシアルキレン基などを示す。） E is an epoxy group and / or trialkoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom. Such an epoxy group is represented by the following general formula (13).

(Wherein R ⁶ is a divalent hydrocarbon group having 1 to 10 carbon atoms, particularly 1 to 5 carbon atoms in which an oxygen atom may intervene, specifically a methylene group, an ethylene group, a propylene group, or a butylene group. And an alkylene group such as a hexylene group and an octylene group, a cycloalkylene group such as a cyclohexylene group, an oxyalkylene group such as an oxyethylene group, an oxypropylene group, and an oxybutylene group.

Specific examples of the epoxy group include those shown below.

（式中、Ｒ^７は炭素原子数１〜１０、特に１〜４の２価炭化水素基、具体的には、メチレン基、エチレン基、プロピレン基、ブチレン基、ヘキシレン基、シクロヘキシレン基、オクチレン基等のアルキレン基などを示し、Ｒ^８は炭素原子数１〜８、特に１〜４の１価炭化水素基、具体的には、メチル基、エチル基、ｎ−プロピル基等のアルキル基などを示す。） On the other hand, the trialkoxysilyl group is represented by the following general formula (14).

(In the formula, R ⁷ is a divalent hydrocarbon group having 1 to 10 carbon atoms, particularly 1 to 4 carbon atoms, specifically, methylene group, ethylene group, propylene group, butylene group, hexylene group, cyclohexylene group, octylene. R ⁸ represents a monovalent hydrocarbon group having 1 to 8 carbon atoms, particularly 1 to 4 carbon atoms, specifically, an alkyl group such as a methyl group, an ethyl group, or an n-propyl group. Is shown.)

Specific examples of the trialkoxysilyl group include those shown below.

  Examples of such component (D) include the following compounds. In the following formulae, Me represents a methyl group.

  This (D) component may be used individually by 1 type, and may use 2 or more types together. Moreover, the compounding quantity of (D) component is 0.10-10.0 mass parts with respect to 100 mass parts of (A) component, Preferably it is the range of 0.50-8.0 mass parts. When the amount is less than 0.10 parts by mass, sufficient adhesion cannot be obtained, and when the amount exceeds 10.0 parts by mass, the fluidity of the composition of the present invention is deteriorated, and the composition of the present invention is cured. There is a possibility that the hardness of the cured product to be reduced.

[(E) component]
The component (E) of the present invention is represented by the following general formula (8): a hydrogen atom directly connected to a silicon atom in a molecule and a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom. Cyclic organopoly having a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom and a cyclic carboxylic anhydride residue bonded to the silicon atom via a divalent hydrocarbon group It is a siloxane and is for improving the adhesion-imparting ability of the component (D) and further promoting the expression of adhesiveness of a cured product obtained by curing the composition of the present invention.

In the general formula (8), x is an integer of 1 to 6, preferably an integer of 2 to 5, y is an integer of 1 to 4, preferably 1 to 3, and z is an integer of 1 to 4, preferably The integer of 1-3, x + y + z is an integer of 4-10, Preferably it is an integer of 4-8. However, the order of bonding of — (SiO) (H) R ⁴ —, — (SiO) (S) R ⁴ —, and — (SiO) (T) R ⁴ — is not limited.

R ⁴ is a substituted or unsubstituted monovalent hydrocarbon group, and examples thereof include the same groups as the substituted or unsubstituted monovalent hydrocarbon group of R ¹ described above.

  Furthermore, S is a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, Similar groups are mentioned. These are groups introduced from the viewpoints of compatibility with the component (A), dispersibility, uniformity after curing, and the like.

  T is a cyclic carboxylic anhydride residue bonded to a silicon atom via a divalent hydrocarbon group, and specific examples include a group represented by the following general formula (15).

In the general formula (15), R ⁹ is a divalent hydrocarbon group having 1 to 15 carbon atoms, and specific examples include a methylene group, an ethylene group, a propylene group, a butylene group, and the like. Is preferred.

  Examples of such component (E) include the following compounds. In the following formulae, Me represents a methyl group.

This (E) component may be used individually by 1 type, and may use 2 or more types together.
The amount of the component (E) is in the range of 0.010 to 10.0 parts by mass, preferably 0.10 to 5.0 parts by mass with respect to 100 parts by mass of the component (A). When the amount is less than 0.010 parts by mass, an effect sufficient to promote the expression of the adhesiveness of the composition of the present invention cannot be obtained, and when it exceeds 10.0 parts by mass, the fluidity of the composition is deteriorated. In addition, the storage stability of the composition may be impaired.

The curable composition for a fixing member of the present invention preferably contains the following component (F) as an optional component.
[(F) component]
The component (F) of the present invention is a divalent which may contain a monovalent unsaturated hydrocarbon group directly bonded to a silicon atom and an oxygen atom or a nitrogen atom, represented by the following general formula (9). A cyclic organopolysiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom via a hydrocarbon group of the above, and obtained by curing the composition of the present invention It gives a better recording paper releasability to a product.

In the general formula (9), l is an integer of 1 to 4, preferably an integer of 1 to 3, m is an integer of 3 to 6, preferably an integer of 3 to 5, and l + m is an integer of 4 to 10, preferably It is an integer of 4-8. However, the order of bonding of — (SiO) (L) R ⁵ — and — (SiO) (M) R ⁵ — is not limited.

R ⁵ is a substituted or unsubstituted monovalent hydrocarbon group, and examples thereof include the same groups as the substituted or unsubstituted monovalent hydrocarbon group of R ¹ described above.

  Furthermore, L is a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, Similar groups are mentioned. These are groups introduced from the viewpoints of compatibility with the component (A), dispersibility, uniformity after curing, and the like.

  M is a monovalent unsaturated chain hydrocarbon group directly connected to a silicon atom, and specific examples include a vinyl group, an allyl group, a butenyl group, a hexenyl group, and a decenyl group. Among these, a vinyl group or an allyl group is preferable.

Examples of such component (F) include the following compounds. In the following formulae, Me represents a methyl group.

  This (F) component may be used individually by 1 type, and may use 2 or more types together. Moreover, the usage-amount of (F) component is 0.10-70.0 mass parts with respect to 100 mass parts of (A) component, Preferably it is the range of 1.0-50.0 mass parts. In the case of 0.10 parts by mass or more, the effect of imparting appropriate rigidity to the cured product obtained by curing the composition of the present invention is sufficient, and in the case of 70.0 parts by mass or less, the composition of the present invention is cured. The cured product thus obtained does not become too hard and there is no risk of crushing the toner.

[Other ingredients]
In the composition of the present invention, in addition to the above components (A) to (E) and (F), a plasticizer, a viscosity modifier, a flexibility-imparting agent, and an inorganic filler are added to increase the practicality. Various compounding agents, such as an adhesion promoter other than an agent, reaction control agent, and (E) component, can be added as needed. The compounding quantity of these additives is arbitrary.

（式中、ｍ２は１以上の整数、好ましくは１〜１００の整数、より好ましくは１〜５０の整数であり、かつ上記（Ａ）成分のＲｆ^１基に関する、ｐとｑの和の平均、ｕとｓの和の平均及びｂ’とｄ’の和の平均のいずれよりも小さい。ｙ’は２又は３である。）］ As a plasticizer, a viscosity modifier, and a flexibility imparting agent, a polyfluoromonoalkenyl compound represented by the following general formula (16) and / or a linear polypolyester represented by the following general formulas (17) and (18) A fluoro compound can be used in combination.
Rf ² − (X ′) _a CH═CH ₂ (16)
[Wherein, X ′ and a are the same as those described in the above formula (1), and Rf ² is a group represented by the following general formula (19).

(In the formula, m2 is an integer of 1 or more, preferably an integer of 1 to 100, more preferably an integer of 1 to 50, and the average of the sum of p and q for the Rf ¹ group of the component (A), smaller than both the average of the sum of u and s and the average of the sum of b 'and d'. y 'is 2 or 3)]

^{_{Rf 3 -O- (CF 2 CF 2}} CF 2 O) c '-Rf 3 (17)
(In the formula, Rf ³ is a group represented by C _{1 ′} F _{2 1 ′ + 1} − (1 ′ is 1 to 3). C ′ is an integer of 1 to 200, preferably an integer of 2 to 100, And smaller than any of the average of the sum of p and q, the average of the sum of u and s, and the average of the sum of b ′ and d ′ for the Rf ¹ group of the component (A).
^{_{Rf 3 -O- (CF 2 O)}} n3 (CF 2 CF 2 O) m3 -Rf 3 (18)
(In the formula, Rf ³ is the same as above. N3 and m3 are each an integer of 1 to 200, preferably an integer of 1 to 100, and the sum of n3 and m3 is the Rf of the component (A). ^(It is smaller than the average of the sum of p and q, the average of the sum of u and s, and the average of the sum of b ′ and d ′ for ^one group.)

  Specific examples of the polyfluoromonoalkenyl compound represented by the general formula (16) include the following compounds (wherein m2 satisfies the above requirements).

Specific examples of the linear polyfluoro compound represented by the general formulas (17) and (18) include the following (for example, the following c ′ or the sum of n3 and m3 satisfies the above requirements) Satisfied.)
_{CF 3 O- (CF 2 CF 2} CF 2 O) c '-CF 2 CF 3
_{CF 3 - [(OCF 2 CF} 2) n3 (OCF 2) m3] -O-CF 3
(Here, c ′ = 1 to 200, m3 + n3 = 2 to 201, m3 = 1 to 200, and n3 = 1 to 200.)

  The viscosity (23 ° C.) of the polyfluoro compound represented by the general formulas (16) to (18) is 5.0 to 100,000 mPa · s, particularly 50 to A range of 50,000 mPa · s is desirable.

  Examples of inorganic fillers include silica powder such as fumed silica, precipitated silica, spherical silica, silica airgel, or the like, or the surface of the silica powder is treated with various organochlorosilanes, organodisilazanes, cyclic organopolysilazanes, etc. The silica powder, and further, the surface-treated silica powder has a monovalent perfluoroalkyl group represented by the general formula (11) or a monovalent perfluorooxyalkyl group represented by the general formula (12). Silica-based reinforcing filler such as silica powder re-treated with organosilane or organosiloxane, quartz powder, fused silica powder, diatomaceous earth, reinforcing filler such as calcium carbonate, semi-reinforcing filler, titanium oxide, iron oxide, Carbon black, inorganic pigments such as cobalt aluminate, titanium oxide, iron oxide, carbon black, cerium oxide Heat resistance improver such as cerium hydroxide, zinc carbonate, magnesium carbonate, manganese carbonate, thermal conductivity imparting agent such as alumina, boron nitride, silicon carbide, metal powder, conductivity such as carbon black, silver powder, conductive zinc white Examples include an imparting agent. In addition, the refractive index of magnesium fluoride, aluminum fluoride, calcium fluoride, lithium fluoride, sodium fluoride, thorium fluoride, silicon oxide, etc. at 25 ° C. and 589 nm (sodium D-line) is 1.50 or less. Inorganic fine particles are also useful as reinforcing fillers.

  Examples of the control agent for the hydrosilylation reaction catalyst include 1-ethynyl-1-hydroxycyclohexane, 3-methyl-1-butyn-3-ol, 3,5-dimethyl-1-hexyn-3-ol, and 3-methyl. An acetylenic alcohol such as -1-pentyn-3-ol and phenylbutynol, and a chlorosilane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group similar to G described above and an acetylenic alcohol Examples include reactants, 3-methyl-3-penten-1-in, 3,5-dimethyl-3-hexen-1-in, triallyl isocyanurate, polyvinyl siloxane, organophosphorus compounds, and the like. Curing reactivity and storage stability can be kept moderate.

Examples of the adhesion promoter other than the component (E) include the following carboxylic acid anhydrides. In the following formulae, Me represents a methyl group. Moreover, these compounds may be used independently and may use 2 or more types together.

  The manufacturing method in particular of the composition of this invention is not restrict | limited, It can manufacture by kneading the said (A)-(E) component, (F) component, and another arbitrary component. At that time, if necessary, a mixing apparatus such as a planetary mixer, a loss mixer, and a Hobart mixer, and a kneading apparatus such as a kneader and a three-roll can be used.

  Regarding the composition of the composition of the present invention, it is configured as a so-called one-component type that handles all of the above components (A) to (E), (F) and other optional components as one composition depending on the application. Alternatively, a two-component type may be used, and both may be mixed at the time of use.

  The total light transmittance of a 2 mm thick cured product obtained by curing the composition of the present invention is 80% or more. When the total light transmittance is less than 80%, there is a possibility that a malfunction of the optical function such as a decrease in detection accuracy of the light reflection sensor may occur. The total light transmittance is measured according to JIS K7361-1.

  Moreover, the viscosity of the composition of this invention in 23 degreeC prescribed | regulated to JISK7117-1 is 100-50,000 mPa * s, Preferably it is 200-30,000 mPa * s. In the case of 100 mPa · s or more, the fluidity is sufficient, and it is easy to apply the composition uniformly to the surface of the base material of the fixing member, which is preferable. As a result, curing obtained by curing the composition The smoothness of the object can be made sufficient. On the other hand, when the viscosity is 50,000 mPa · s or less, the leveling property is excellent, and similarly, it becomes easy to uniformly apply the composition to the surface of the base material of the fixing member, and the flatness of the cured product is sufficient. Can be.

  The fixing member of the present invention is a fixing roll or fixing belt used in an image forming apparatus such as an electrophotographic copying machine, a facsimile machine, or a printer, and a cured product obtained by curing the surface layer of the composition of the present invention. To do.

  Usually, the fixing roll is made of a core metal made of a metal such as aluminum, iron, steel, or stainless steel, and the fixing belt is an endless made of a heat resistant resin such as polyimide or polyamide in addition to a metal such as nickel or stainless steel. The belt is the base material.

  The fixing member of the present invention is obtained by applying the composition of the present invention to the surface of the substrate and heating to cure the composition. The method for applying the composition to the substrate is not particularly limited as long as it is uniformly applied. For example, a solution obtained by diluting the composition to a desired concentration with an appropriate fluorine-based solvent is prepared. The method of apply | coating this to the said base material by general coating methods, such as brush coating, spray coating, dip coating, roll coating, or spin coating, is mentioned.

  The fluorine-based solvent for diluting the composition of the present invention is not particularly limited as long as the composition is uniformly dispersed. For example, 1,3-bis (trifluoromethyl) benzene and 1,4-bis (trifluoro) Fluorine-containing organic aromatic compounds such as methyl) benzene, perfluoro cyclic ethers such as perfluoro (2-n-butyltetrahydrofuran), perfluoro (2-n-octyltetrahydrofuran) and perfluoro-15-crown-5-ether, Perfluorocarbons represented by Sumitomo 3M Fluorinert (FC-72, FC-75, FC-77, FC-84, etc.), Perfluorocarbons represented by Solvay Solexis, GALDEN (SV90, SV110, SV135, etc.) Examples include polyethers. These may be used alone or in combination of two or more.

  The heating temperature for curing the composition is not particularly limited, but is usually 20 to 200 ° C, preferably 60 to 200 ° C, and more preferably 100 to 200 ° C. In this case, the heating time may be appropriately selected as long as the crosslinking reaction and the adhesion reaction of the fixing member with the base material are completed. Generally, the heating time is 10 minutes to 10 hours, preferably 30 minutes to 10 hours. More preferably, it is 1 hour-10 hours.

  As described above, when the composition of the present invention is diluted with an appropriate fluorine-based solvent and applied to the base material of the fixing member, the fluorine-based solvent is sufficiently volatilized by leaving it at room temperature for 1 to 60 minutes, for example. After the heating, the above heat curing method is recommended.

  Various primers can also be used in order to more firmly bond the cured product obtained by curing the composition of the present invention and the base material of the fixing member.

  In this case, first, various primer is applied to the base material of the fixing member using a commonly employed coating method such as brush coating method, spray coating method, wire bar method, blade method, roll coating method, dipping method, etc. And coat. Next, after air drying at normal temperature for 1 minute to 60 minutes, preferably 5 minutes to 30 minutes, 50 ° C. to 180 ° C., preferably 80 ° C. to 150 ° C. for 1 minute to 60 minutes, preferably 5 minutes to 30 minutes. Heat to form a cured film on the substrate.

  The fixing member of the present invention is obtained by applying the composition of the present invention to the surface of the substrate thus prepared as described above, followed by heat curing.

  The thickness of the cured product formed by curing the composition of the present invention formed on the surface of the fixing member is not particularly limited, but the lifetime of the thermal conductivity and toner releasability of the fixing member is not limited. In consideration of the balance, the thickness is 5 to 500 μm, preferably 20 to 400 μm, more preferably 40 to 200 μm. If it is 5 μm or more, it is preferable because a sufficient toner releasability life is obtained due to abrasion with the recording paper. If it is 500 μm or less, sufficient thermal conductivity is obtained, and the toner is sufficiently melted on the surface of the fixing member. However, it is preferable because there is no problem that uneven toner fixing occurs on the recording paper.

  Furthermore, as the fixing member of the present invention, an intermediate layer made of various rubbers may be provided between the cured product obtained by curing the composition of the present invention and the base material of the fixing member, if necessary. . Examples of the rubber forming the intermediate layer include silicone rubber, fluorine rubber, and urethane rubber.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, Me represents a methyl group. Moreover, a viscosity shows the measured value in 23 degreeC prescribed | regulated to JISK7117-1.

Example 1
A linear polyfluoro compound represented by the following formula (20) (viscosity 4,010 mPa · s, vinyl group content 0.0299 mol / 100 g) is added to 100 parts by mass of an organohydrogensiloxane (SiH) represented by the following formula (21). (Base amount 0.00322 mol / g) 10.2 parts by mass, toluene solution of platinum-divinyltetramethyldisiloxane complex (platinum concentration 0.5% by mass) 0.15 parts by mass, cyclic represented by the following formula (22) 2.0 parts by mass of organopolysiloxane and 0.50 parts by mass of cyclic organopolysiloxane represented by the following formula (23) were sequentially added and mixed so as to be uniform. Then, the composition was prepared by performing defoaming operation.

(Example 2)
In Example 1, in place of the organohydrogensiloxane represented by the above formula (21), 10.3 parts by mass of an organohydrogensiloxane represented by the following formula (24) (SiH group amount 0.00319 mol / g) was added. Further, in place of the cyclic organopolysiloxane represented by the above formula (22), 2.0 parts by mass of the cyclic organopolysiloxane represented by the following formula (25) was added. Prepared.

Example 3
In Example 1, instead of the organohydrogensiloxane represented by the formula (21), 34.0 parts by mass of an organohydrogensiloxane represented by the following formula (26) (SiH group amount 0.000967 mol / g) was added. Furthermore, instead of the cyclic organopolysiloxane represented by the above formula (23), a composition was prepared in the same manner as in Example 1 except that 0.50 parts by mass of the cyclic organopolysiloxane represented by the following formula (27) was added. Prepared.

Example 4
In Example 1, in place of the organohydrogensiloxane represented by the above formula (21), 10.1 parts by mass of an organohydrogensiloxane represented by the following formula (28) (SiH group amount 0.00327 mol / g) was added. Further, in place of the cyclic organopolysiloxane represented by the above formula (22), the composition was added in the same manner as in Example 1 except that it was added to 3.0 parts by mass of the cyclic organopolysiloxane represented by the following formula (29). Prepared.

(Example 5)
In Example 1, in place of the organohydrogensiloxane represented by the above formula (21), 10.1 parts by mass of an organohydrogensiloxane represented by the following formula (30) (SiH group amount 0.00326 mol / g) was added. Furthermore, instead of the cyclic organopolysiloxane represented by the above formula (22), the composition was the same as in Example 1 except that it was added to 3.0 parts by mass of the cyclic organopolysiloxane represented by the following formula (31). Prepared.

(Example 6)
In Example 1, the addition amount of the organohydrogensiloxane represented by the above formula (21) was changed to 17.9 parts by mass, and the cyclic organopolysiloxane represented by the following formula (32) (vinyl group amount 0.00451 mol) / G) A composition was prepared in the same manner as in Example 1 except that 5.0 parts by mass was added.

(Example 7)
In Example 1, the addition amount of the organohydrogensiloxane represented by the above formula (21) was changed to 25.6 parts by mass, and the cyclic organopolysiloxane represented by the above formula (32) (vinyl group amount 0.00451 mol). / G) A composition was prepared in the same manner as in Example 1 except that 10.0 parts by mass was added.

(Example 8)
In Example 2, the addition amount of the organohydrogensiloxane represented by the above formula (24) was changed to 47.2 parts by mass, and the cyclic organopolysiloxane represented by the following formula (33) (vinyl group amount: 0.00357 mol) / G) A composition was prepared in the same manner as in Example 2 except that 30.0 parts by mass were added.

Example 9
In Example 2, the addition amount of the organohydrogensiloxane represented by the above formula (24) was changed to 45.7 parts by mass, and the cyclic organopolysiloxane represented by the following formula (34) (vinyl group amount 0.00205 mol) / G) A composition was prepared in the same manner as in Example 2 except that 50.0 parts by mass were added.

(Comparative Example 1)
In a kneader, 10.0 parts by mass of fumed silica Aerosil R972 (trade name, manufactured by Aerosil) is added to 100 parts by mass of the linear polyfluoro compound represented by the above formula (20) and kneaded at room temperature for 1 hour. did. Next, the mixture was heated to 130 ° C. and kneaded at a gauge pressure of −0.09 MPa for 2 hours. The kneaded product was cooled to room temperature and then passed once through three rolls to obtain a liquid base compound. To 110 parts by mass of the liquid base compound, 10.2 parts by mass of the organohydrogensiloxane represented by the above formula (21) and a toluene solution of the platinum-divinyltetramethyldisiloxane complex (platinum concentration: 0.5% by mass) 0.15 Mass parts, 2.0 parts by mass of the cyclic organopolysiloxane represented by the above formula (22) and 0.50 parts by mass of the cyclic organopolysiloxane represented by the above formula (23) were sequentially added and mixed so as to be uniform. . Then, the composition was prepared by performing defoaming operation.

(Comparative Example 2)
In Example 1, instead of the organohydrogensiloxane represented by the above formula (21), 2.86 parts by mass of an organohydrogensiloxane represented by the following formula (35) (SiH group content 0.0115 mol / g) was added. A composition was prepared in the same manner as in Example 1 except that. As a result, the composition lacks the component (B).

(Comparative Example 3)
In Example 1, instead of the organohydrogensiloxane represented by the above formula (21), 2.94 parts by mass of an organohydrogensiloxane represented by the following formula (36) (SiH group content 0.0112 mol / g) was added. A composition was prepared in the same manner as in Example 1 except that. As a result, the composition lacks the component (B).

(Comparative Example 4)
In Example 2, 4.73 parts by mass of an organohydrogensiloxane represented by the following formula (37) (SiH group amount 0.00695 mol / g) was added instead of the organohydrogensiloxane represented by the above formula (24). A composition was prepared in the same manner as in Example 1 except that. As a result, the composition lacks the component (B).

(Comparative Example 5)
In Example 2, instead of the organohydrogensiloxane represented by the above formula (24), 6.12 parts by mass of an organohydrogensiloxane represented by the following formula (38) (SiH group amount 0.00537 mol / g) was added. A composition was prepared in the same manner as in Example 1 except that. As a result, the composition lacks the component (B).

(Comparative Example 6)
In Example 1 above, in the same manner as Example 1 except that 2.0 parts by mass of the cyclic organopolysiloxane represented by the following formula (39) was added instead of the cyclic organopolysiloxane represented by the above formula (22). A composition was prepared. As a result, the composition lacks the component (D).

(Comparative Example 7)
In Example 2, the same procedure as in Example 2 except that 1.0 part by mass of the cyclic organopolysiloxane represented by the following formula (40) was added instead of the cyclic organopolysiloxane represented by the above formula (23). A composition was prepared. As a result, the composition lacks the component (E).

(Comparative Example 8)
In Example 6, the addition amount of the organohydrogensiloxane represented by the above formula (21) was changed to 30.0 parts by mass, and instead of the cyclic organopolysiloxane represented by the above formula (32), the following formula (41) The composition was prepared in the same manner as in Example 6 except that 5.0 parts by mass of a cyclic organopolysiloxane (vinyl group content: 0.0116 mol / g) represented by formula (1) was added. As a result, the composition lacks the component (F).

(Comparative Example 9)
In Example 7, 18.5 parts by mass of an organohydrogensiloxane (SiH group amount 0.00868 mol / g) represented by the following formula (42) was added instead of the organohydrogensiloxane represented by the above formula (21). A composition was prepared in the same manner as in Example 7 except that 10.0 parts by mass of the cyclic organopolysiloxane represented by the above formula (41) was added instead of the cyclic organopolysiloxane represented by the above formula (32). did. As a result, the composition lacks the component (B) and the component (F).

  For each composition, the following items were evaluated. The curing condition is 150 ° C. × 1 hour.

1. Viscosity of the composition: measured at 23 ° C. according to JIS K7117-1. The results are shown in Table 1.

2. Total light transmittance: A sheet-like cured product having a thickness of 2 mm was prepared, and the total light transmittance was measured according to JIS K7361-1 using a haze meter HGM-2 (manufactured by Suga Test Instruments Co., Ltd.). The results are shown in Table 1.

3. Evaluation of fixing belt:
[Preparation of coating solution]
1,3-bis (trifluoromethyl) benzene: GALDEN SV135 (manufactured by Solvay Solexis) = 6: 4 (mass ratio) mixed solution was used as a diluted solution to prepare a 20% by mass coating solution for each of the above compositions did.

[Preparation of fixing belt]
The prepared coating solution is dip-coated on the outer surface of a nickel tubular fixing belt substrate (thickness 0.05 mm, inner diameter 200 mm, width 300 mm), left at room temperature for 30 minutes, and then heated at 150 ° C. for 1 minute. Heated for hours. As a result, a fixing belt having a cured product obtained by curing the above composition on the outer surface was obtained.

  The prepared fixing belt was incorporated in a full-color printer equipped with a light reflection sensor for detecting the position and density of the toner image, and printing was performed on 10,000 sheets of plain paper using the printer. Table 1 shows the number of paper jams that occurred because the printing paper did not peel from the fixing belt during this printing.

  Table 1 shows the operating state of the light reflection sensor when printing on 10,000 sheets of plain paper using the printer.

  From the results of Table 1, since Comparative Examples 1 to 9 do not contain one or more of the components (A) to (F) or are outside the transmittance range defined in the present invention, the number of printed materials is determined. There were many paper jams when stacked, and there was a problem with the operation status of the light reflection sensor. In the curable compositions for fixing members of the present invention (Examples 1 to 9), the frequency of paper jams was less than that of Comparative Examples 1 to 9, and the light reflection sensor operated normally. From this, the cured product obtained by curing the curable composition for a fixing member of the present invention is suitable as a material for forming the surface layer of the fixing member for an image forming apparatus.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has any configuration that has substantially the same configuration as the technical idea described in the claims of the present invention and that exhibits the same effects. It is contained in the technical range.

Claims (8)

(A) The following general formula (1)
_{CH 2 = CH- (X) a} -Rf 1 - (X ') a -CH = CH 2 (1)
[Wherein, X is _{-CH 2 -, - CH 2 O} -, - CH 2 OCH 2 -, and ^-Y-NR 1 -CO- (Y is -CH ₂ - or the following structural formula (2)

O, m or p-dimethylsilylphenylene group represented by the formula: R ¹ is a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group), X ′ is —CH ₂ —, — OCH ₂ —, —CH ₂ OCH ₂ —, and —CO—NR ¹ —Y′— (where Y ′ is —CH ₂ — or the following structural formula (3)

O, m or p-dimethylsilylphenylene group represented by the above, R ¹ is the same group as described above. ), And a is independently 0 or 1. Rf ¹ represents the following general formula (4) or (5)

(Wherein p and q are each an integer of 1 to 150, and the average of the sum of p and q is 2 to 300. Also, r is an integer of 0 to 6 and t is 2 or 3. .)

(In the formula, u is an integer of 1 to 300, s is an integer of 1 to 80, and the average of the sum of u and s is 2 to 380. t is the same as above.)
It is a bivalent perfluoropolyether group represented by these. ]
Linear polyfluoro compound represented by: 100 parts by mass,
(B) A silicon atom via a hydrogen atom directly connected to a silicon atom and a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom, represented by the following general formula (6) An organohydrogensiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to

(In the formula, J represents an oxygen atom, an alkylene group, a divalent perfluoroalkylene group or a divalent perfluoroalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom. A fluorooxyalkylene group, and G is independently a monovalent perfluoroalkyl group or a monovalent group bonded to a silicon atom via a divalent hydrocarbon group which may contain a silicon atom, an oxygen atom or a nitrogen atom. R ² is independently a substituted or unsubstituted monovalent hydrocarbon group, s ′ is an integer of 0 or 1 to 3, t ′ is 0 or 1 to 3 S ′ + t ′ is an integer of 1 to 5.)
(C) Platinum group metal catalyst: 0.10 to 500 ppm in terms of platinum group metal atom,
(D) Bonded to a silicon atom via a hydrogen atom directly bonded to a silicon atom in one molecule and a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom, represented by the following general formula (7) Cyclic having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group and an epoxy group and / or trialkoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom Organopolysiloxane: 0.10 to 10.0 parts by mass,

(Wherein i is an integer of 1 to 6, j is an integer of 1 to 4, k is an integer of 1 to 4, i + j + k is an integer of 4 to 10, R ³ is a substituted or unsubstituted monovalent hydrocarbon group, D is a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and E may contain an oxygen atom An epoxy group and / or trialkoxysilyl group bonded to a silicon atom via a divalent hydrocarbon group, provided that — (SiO) (H) R ³ —, — (SiO) (D) R ³ — and The order of bonding of — (SiO) (E) R ³ — is not limited.)
(E) Bound to a silicon atom through a hydrogen atom directly bonded to a silicon atom in one molecule and a divalent hydrocarbon group that may contain an oxygen atom or a nitrogen atom, represented by the following general formula (8) Cyclic organopolysiloxane having a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group and a cyclic carboxylic anhydride residue bonded to a silicon atom via a divalent hydrocarbon group: 0.010 10.0 parts by mass,

(Wherein x is an integer of 1 to 6, y is an integer of 1 to 4, z is an integer of 1 to 4, x + y + z is an integer of 4 to 10, R ⁴ is a substituted or unsubstituted monovalent hydrocarbon group, S is a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may contain an oxygen atom or a nitrogen atom, and T is a divalent hydrocarbon group A cyclic carboxylic anhydride residue bonded to a silicon atom via a —, — (SiO) (H) R ⁴ —, — (SiO) (S) R ⁴ — and — (SiO) (T) R ⁴ The order of bonding of-is not limited.)
A curable composition for a fixing member containing
The blending amount of the component (B) is such that the hydrogen atom (SiH group) directly bonded to the silicon atom in the component (B) is 0.50 to 2.1 mol with respect to 1 mol of the alkenyl group contained in the composition. The amount to be 0 mole,
Fixing characterized in that a 2 mm thick cured product obtained by curing the curable composition for a fixing member has a total light transmittance of 80% or more measured according to JIS K7361-1. Curable composition for members. Furthermore, as the component (F), a divalent carbon atom represented by the following general formula (9), which may contain a monovalent unsaturated hydrocarbon group directly bonded to a silicon atom in one molecule, and an oxygen atom or a nitrogen atom. Cyclic organopolysiloxane having a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group bonded to a silicon atom via a hydrogen group: 0.10 to 70.0 parts by mass,

Wherein l is an integer of 1 to 4, m is an integer of 3 to 6, l + m is an integer of 4 to 10, R ⁵ is a substituted or unsubstituted monovalent hydrocarbon group, L is an oxygen atom or a nitrogen atom A monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a divalent hydrocarbon group which may be contained, M is a monovalent unsaturated hydrocarbon group directly bonded to the silicon atom However, the order of bonding of — (SiO) (L) R ⁵ — and — (SiO) (M) R ⁵ — is not limited.)
Including
The blending amount of the component (B) is based on the silicon atoms in the component (B) with respect to a total of 1 mol of the alkenyl group of the component (A) and the monovalent unsaturated hydrocarbon group of the component (F). The curable composition for a fixing member according to claim 1, wherein the amount of directly connected hydrogen atoms (SiH groups) is 0.50 to 2.0 mol.   The fixing member according to claim 1, wherein the curable composition for a fixing member has a viscosity at 23 ° C. defined in JIS K7117-1 of 100 to 50,000 mPa · s. Curable composition. The curable composition for a fixing member according to any one of claims 1 to 3, wherein the component (A) is represented by the following general formula (10).

[Wherein, X and X ′ are the same as described above. A ′ is independently 0 or 1, b ′ and d ′ are each an integer of 1 to 150, the average of the sum of b ′ and d ′ is 2 to 300, and e ′ is an integer of 2 to 6. ]   5. The alkenyl group content of the linear polyfluoro compound of the component (A) is 0.0050 to 0.100 mol / 100 g, according to any one of claims 1 to 4. A curable composition for a fixing member. Before SL monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group, each represented by the following general formula (11) or formula (12) that is represented by and said claims 1 to Item 6. The curable composition for a fixing member according to any one of Items 5.
C _f F _{2f + 1} − (11)
(In the formula, f is an integer of 1 to 10.)

(Wherein g is an integer of 1 to 10)   A fixing member for an image forming apparatus, wherein a cured product obtained by curing the curable composition for a fixing member according to any one of claims 1 to 6 is used as a surface layer.   The fixing member for an image forming apparatus according to claim 7, wherein the fixing member for the image forming apparatus is used for a fixing roll or a fixing belt of the image forming apparatus.