JP2019019218A - Sol composition and manufacturing method thereof, transfer body, transfer type inkjet recording device and transfer type inkjet recording method - Google Patents

Abstract

To provide a sol composition including a hydrolysis condensate of an organic silane compound, capable of imparting water repellency and flexibility appropriate for a surface layer part of a transfer body for a transfer type inkjet recording.SOLUTION: A sol composition for a transfer body for a transfer type inkjet recording includes a hydrolysis condensate of a cyclic ether group-containing silane compound, an alkyl group-containing silane compound and a long chain fluoroalkyl group-containing silane compound. A condensation rate of the hydrolysis condensate is 45-70%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sol composition and a method for producing the sol composition, a transfer body, a transfer ink jet recording apparatus and a transfer ink jet recording method using the transfer body.

  Fluorine-containing polysiloxanes obtained by hydrolyzing and condensing fluorine-containing organosilane compounds are excellent in water / oil repellency and stain resistance, and are useful as low refractive index materials. For this reason, fluorine-containing polysiloxanes are used as coating agents for film formation of water repellents, antifouling films, antireflection films such as lenses and displays.

Patent Document 1 discloses a hydrolysis-condensation product of a fluorine-containing silane compound and an epoxy group-containing silane compound under a base catalyst. Patent Document 2 discloses a hydrolysis-condensation product of a perfluoroalkyl group-containing silane compound and an alkyl group-containing silane compound under an acid catalyst.
Also, as an image recording method using ink, a transfer type ink jet recording method in which an ink image is formed by applying ink to an image forming surface of a transfer body using an ink jet device, and the formed ink image is transferred to a recording medium. It has been known. It is preferable that the transfer body used in this image recording method has a property of easily peeling the ink image on the surface thereof, that is, a good intermediate image transfer property.
Patent Document 3 discloses a transfer body for transfer-type inkjet recording in which a fluorine-containing polysiloxane layer having high water repellency is provided on the surface.

JP 2007-2194 A JP 2002-194336 A Japanese Unexamined Patent Publication No. 2014-231223

  In a transfer body for transfer type inkjet recording, moderate hydrophilicity is also required in order to form a good ink image with ink. For this reason, when conventional fluorine-containing polysiloxane is used on the surface of the transfer body, it may be difficult to form a good ink image because the water repellency is too high. When a fluorine-containing polysiloxane is synthesized from an alkoxysilane monomer, white turbidity or gelation may occur in the conventional synthesis method.

  Furthermore, in the transfer body for transfer type ink jet recording, for good transferability, it is necessary to impart flexibility to the surface of the transfer body and improve the shape followability to the surface of the recording medium. Durability against contact with the recording medium is also required. Accordingly, the surface of the transfer body is required to have appropriate flexibility, but it may be difficult to achieve both transferability and durability with conventional fluorine-containing polysiloxanes.

  Accordingly, an object of the present invention is to provide a sol composition capable of imparting appropriate water repellency and flexibility, and a method for producing the sol composition. Another object of the present invention is to provide a transfer body excellent in transferability and durability, a transfer ink jet recording apparatus and a transfer ink jet recording method using the transfer body.

〔式中、Ｘは環を構成する炭素原子数が２又は３の環状エーテル基を含む有機基を表す。Ｒ^１及びＲ^２はそれぞれ独立して、炭素原子数１乃至６の直鎖又は分枝状のアルキル基を表す。ｎは０又は１を表す。〕
で表される環状エーテル基含有シラン化合物と、
（Ｂ）下記一般式［２］

〔式中、Ｚは炭素原子数１乃至６の直鎖又は分枝状のアルキル基を表す。Ｒ^３及びＲ^４はそれぞれ独立して、炭素原子数１乃至６の直鎖又は分枝状のアルキル基を表す。ｍは０又は１を表す。〕
で表されるアルキル基含有シラン化合物と、
（Ｃ）下記一般式［３］

〔式中、Ｙ^１はフッ素原子数９乃至２５、炭素原子数４乃至１４の直鎖又は分枝状のフッ化アルキル基を表す。Ｒ^５及びＲ^６はそれぞれ独立して、炭素原子数１乃至６の直鎖又は分枝状のアルキル基を表す。ｐは０又は１を表す。〕
で表される長鎖フッ化アルキル基含有シラン化合物と、
の加水分解縮合物を含む転写型インクジェット記録の転写体用のゾル組成物であって、
前記加水分解縮合物の縮合率が４５％以上７０％以下であることを特徴とする。 The object is achieved by the present invention described below.
The sol composition according to the present invention is:
(A) The following general formula [1]

[Wherein, X represents an organic group containing a cyclic ether group having 2 or 3 carbon atoms constituting the ring. R ¹ and R ² each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. n represents 0 or 1. ]
A cyclic ether group-containing silane compound represented by:
(B) The following general formula [2]

[In the formula, Z represents a linear or branched alkyl group having 1 to 6 carbon atoms. R ³ and R ⁴ each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. m represents 0 or 1; ]
An alkyl group-containing silane compound represented by:
(C) The following general formula [3]

[Wherein Y ¹ represents a linear or branched fluorinated alkyl group having 9 to 25 fluorine atoms and 4 to 14 carbon atoms. R ⁵ and R ⁶ each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. p represents 0 or 1; ]
A long-chain fluorinated alkyl group-containing silane compound represented by:
A sol composition for a transfer body of a transfer type ink jet recording containing a hydrolysis condensate of
The condensation rate of the hydrolysis condensate is 45% or more and 70% or less.

Further, the method for producing a sol composition according to the present invention includes:
(A) the cyclic ether group-containing silane compound represented by the general formula [1], (B) the alkyl group-containing silane compound represented by the general formula [2], and (C) the general formula [3]. A step of obtaining a mixture by mixing a long-chain fluorinated alkyl group-containing silane compound represented by formula (II) and an organic acid, and a step of obtaining a sol composition containing the hydrolysis-condensation product by hydrolysis and condensation of the mixture. It is characterized by having.

  The transfer body according to the present invention is a transfer body for transfer type ink jet recording having at least a surface layer portion, and has at least a cured product of the sol composition in the surface layer portion.

  In addition, a transfer type inkjet recording apparatus according to the present invention includes the above-described transfer body.

  Furthermore, the transfer type inkjet recording method according to the present invention includes a step of forming an ink image by applying an ink on a transfer body using an inkjet device, and transferring the ink image from the transfer body to a recording medium. A transfer-type ink jet recording method comprising the steps of: a step, wherein the transfer body is the transfer body described above.

  ADVANTAGE OF THE INVENTION According to this invention, the sol composition which can provide moderate softness | flexibility and water repellency, and the manufacturing method of this sol composition can be provided. Furthermore, according to the present invention, it is possible to provide a transfer body excellent in transferability and durability, a transfer ink jet recording apparatus and a transfer ink jet recording method using the transfer body.

It is a schematic diagram which shows the structure of the transfer body for transfer type inkjet recording of this invention. It is a figure which shows the structural example of the transfer body for transfer type inkjet recording of this invention. It is a schematic diagram showing an example of a transfer type ink jet recording apparatus of the present invention.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments. In the present invention, an ink jet recording apparatus provided with a transfer body is hereinafter referred to as a transfer type ink jet recording apparatus for convenience, and an ink jet recording method using the transfer body is hereinafter referred to as a transfer type ink jet recording method for convenience. .
<Sol composition>
The sol composition of the present invention is a sol composition containing a hydrolysis condensate of the following component (A), the following component (B), and the following component (C), and is used for a transfer body of transfer type inkjet recording. It is a sol composition.
(A) Cyclic ether group-containing silane compound represented by general formula [1] (B) Alkyl group-containing silane compound represented by general formula [2] (C) Represented by general formula [3] Silane compounds containing long-chain fluorinated alkyl groups

The inventors paid attention to the monomer composition of each organosilane compound constituting the sol composition and the condensation rate of the sol composition. Specifically, the present invention has been completed by the following considerations.
The sol composition used for the surface layer portion of the transfer body for transfer type inkjet recording is required to have both appropriate strength and flexibility after curing. Therefore, the present inventors considered to combine the strength obtained by crosslinking by polymerization of a cyclic ether group with the flexibility obtained from a non-crosslinkable alkyl group by adding functionality to the silane compound monomer. Furthermore, the sol composition for the transfer body is also required to have appropriate water repellency, in other words, low surface free energy. Therefore, the present inventors considered adding a long-chain fluorinated alkyl group-containing silane compound monomer together with the two types of silane compounds as a monomer for obtaining a hydrolysis condensate. Furthermore, considering that it is a hydrolyzed condensate by at least three kinds of functional silane compounds, and further setting the condensation rate of the hydrolyzed condensate to a specific range, the sol composition for a transfer body of the present invention can be used. It came.
The sol composition of the present invention is prepared by adding an organic silane compound (A) to (C), a polymerization initiator for a cyclic ether group, and, if necessary, other additives, mixing, and diluting with a solvent. Prepared as a curable solution. The curable solution is used as a cured product cured by light irradiation and / or heating.

(A) Cyclic ether group-containing silane compound The cyclic ether group-containing silane compound represented by the formula [1] is used for crosslinking by polymerization of cyclic ether groups in addition to the formation of siloxane bonds by hydrolysis and condensation reactions. The Therefore, the cyclic ether group-containing silane compound has an effect of increasing the hardness and the strength of the cured product in the cured product according to the present invention.

  In particular, when the polymerization of the cyclic ether group is performed by light irradiation, the light irradiation is performed before the heating, so that it can be used as temporary curing of the coating film of the curable solution. By such temporary curing, the cured product film is reduced in film thickness variation and surface shape roughness, and a cured product film having a high uniform film forming property can be obtained.

  In the organic group containing a cyclic ether group represented by X in the formula [1], the cyclic ether group having 2 or 3 carbon atoms constituting the ring is an epoxy group or an oxetanyl group, each substituted with an alkyl group. May be.

  Specific examples of the organic group containing a cyclic ether group represented by X include 2-glycidoxyethyl group, 3-glycidoxypropyl group, 2- (3,4-epoxycyclohexyl) ethyl group, 3- ( 3-oxetanyloxy) propyl group, 3- (3-methyloxetan-3-yloxy) propyl group, 3- (3-oxetanylmethoxy) propyl group, 3- (3-ethyloxetan-3-ylmethoxy) propyl group, 2 -(3-Oxetanyloxy) ethyl group, 2- (3-methyloxetan-3-yloxy) ethyl group, 2- (3-oxetanylmethoxy) ethyl group, 2- (3-ethyloxetan-3-ylmethoxy) ethyl group However, it is not limited to these. The organic group containing a cyclic ether group represented by X is more preferably a 3-glycidoxypropyl group.

Specific examples of the linear or branched alkyl group having 1 to 6 carbon atoms represented by R ¹ and R ² in the formula [1] include a methyl group, an ethyl group, a propyl group, an isopropyl group, Examples include, but are not limited to, n-butyl group, sec-butyl group, isobutyl group, tert-butyl group, n-pentyl group, sec-pentyl group, isopentyl group, neopentyl group, and n-hexyl group. The linear or branched alkyl group having 1 to 6 carbon atoms represented by R ¹ and R ² is preferably a methyl group or an ethyl group.

In the formula [1], n represents 0 or 1, and preferably n is 1. When n is 1, the cyclic ether group-containing silane compound is a bifunctional condensable silane compound monomer having two condensable alkoxy groups represented by OR ² in the formula [1]. In the case of a bifunctional monomer, the condensate becomes a linear one-dimensional polysiloxane, and no crosslinking point is formed due to the formation of a siloxane bond, so that the hardness of the cured product is prevented from becoming excessively high, and the cured product is flexible. It is preferable because it can give a good elasticity.

  Specific examples of the cyclic ether group-containing silane compound represented by the formula [1] include 2-glycidoxyethylmethyldimethoxysilane, 2-glycidoxyethylmethyldiethoxysilane, and 3-glycidoxypropylmethyldimethoxysilane. 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropylethyldiethoxysilane, 3-glycidoxypropylethyldimethoxysilane, 3-glycidoxypropylbutyldiethoxysilane, 2- (3,4 -Epoxycyclohexyl) ethylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethylpropyldiethoxysilane, 2-glycidoxyethyltrimethoxysilane , 2-glycidoxyethyl Triethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2 -(3,4-epoxycyclohexyl) ethyltriethoxysilane 3- (3-oxetanyloxy) propylmethyldimethoxysilane, 3- (3-oxetanyloxy) propylmethyldiethoxysilane, 3- (3-oxetanyloxy) propyltri Methoxysilane, 3- (3-oxetanyloxy) propyltriethoxysilane, 3- (3-methyloxetan-3-yloxy) propylmethyldimethoxysilane, 3- (3-methyloxetan-3-yloxy) propylmethyldiethoxysilane 3- (3-methyloxetane-3-yloxy) propyltrimethoxysilane, 3- (3-methyloxetane-3-yloxy) propyltriethoxysilane, 3- (3-oxetanylmethoxy) propylmethyldimethoxysilane, 3 -(3-Oxetanylmethoxy) propylmethyldiethoxysilane, 3- (3-oxetanylmethoxy) propyltrimethoxysilane, 3- (3-oxetanylmethoxy) propyltriethoxysilane, 3- (3-ethyloxetan-3-ylmethoxy) ) Propylmethyldimethoxysilane, 3- (3-ethyloxetane-3-ylmethoxy) propylmethyldiethoxysilane, 3- (3-ethyloxetane-3-ylmethoxy) propyltrimethoxysilane, 3- (3-ethyloxetane-3) -Ilmet Xyl) propyltriethoxysilane, 2- (3-oxetanyloxy) ethylmethyldimethoxysilane, 2- (3-oxetanyloxy) ethylmethyldiethoxysilane, 2- (3-oxetanyloxy) ethyltrimethoxysilane, 2- ( 3-oxetanyloxy) ethyltriethoxysilane, 2- (3-methyloxetane-3-yloxy) ethylmethyldimethoxysilane, 2- (3-methyloxetane-3-yloxy) ethylmethyldiethoxysilane, 2- (3- Methyloxetane-3-yloxy) ethyltrimethoxysilane, 2- (3-methyloxetane-3-yloxy) ethyltriethoxysilane, 2- (3-oxetanylmethoxy) ethylmethyldimethoxysilane, 2- (3-oxetanylmethoxy) Ethyl methyl diet Sisilane, 2- (3-oxetanylmethoxy) ethyltrimethoxysilane, 2- (3-oxetanylmethoxy) ethyltriethoxysilane, 2- (3-ethyloxetan-3-ylmethoxy) ethylmethyldimethoxysilane, 2- (3- Examples include ethyl oxetane-3-ylmethoxy) ethylmethyldiethoxysilane, 2- (3-ethyloxetane-3-ylmethoxy) ethyltrimethoxysilane, 2- (3-ethyloxetane-3-ylmethoxy) ethyltriethoxysilane, and the like. However, it is not limited to these.

(B) Alkyl group-containing silane compound The alkyl group-containing silane compound represented by the formula [2] contributes to an appropriate flexibility of the cured product. In particular, by controlling the content ratio with respect to the cyclic ether group-containing silane compound, a cured product having both appropriate hardness and flexibility can be obtained.

In the formula [2], specific examples of the linear or branched alkyl group having 1 to 6 carbon atoms represented by Z are the above-described formulas represented by R ¹ and R ² in the formula [1]. This is the same as the specific example of the alkyl group. Further, the linear or branched alkyl group having 1 to 6 carbon atoms represented by Z is preferably a methyl group.
Specific examples of the linear or branched alkyl group having 1 to 6 carbon atoms represented by R ³ and R ⁴ in the formula [2] include R ¹ and R ² in the formula [1]. This is the same as the specific examples of the alkyl group described above. Moreover, as with ^{R 1} and ^{R 2} in the formula [1], it is preferred that ^{R 3} and ^{R 4} are methyl and ethyl.

In the formula [2], m represents 0 or 1, and m is preferably 1. When m is 1, the alkyl group-containing silane compound is a bifunctional condensable silane compound monomer having two condensable alkoxy groups represented by OR ⁴ in the formula [2], and the condensate is It becomes a chain-like one-dimensional polysiloxane. Therefore, for the same reason as described above, the bifunctional monomer is preferable because it can impart a flexible elasticity to the cured product.

  Specific examples of the alkyl group-containing silane compound represented by the formula [2] include methyltrimethoxysilane, dimethyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, methyltri-n-propoxysilane, and n-propyltrimethoxy. Silane, n-propyltriethoxysilane, diisopropyldimethoxysilane, di-n-butyldimethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane, diisobutyldimethoxysilane, diisobutyldiethoxysilane, n-pentyltriethoxysilane, n-hexyl Trimethoxysilane, n-hexyltriethoxysilane, n-octyltrimethoxysilane, n-octyltriethoxysilane, n-octylmethyltrimethoxysilane, n-octylmethylto Ethoxysilane, isooctyltrimethoxysilane, n-decyltrimethoxysilane, n-decyltriethoxysilane, n-dodecyltriethoxysilane, n-dodecylmethyldiethoxysilane, n-octadecyltrimethoxysilane, n-octadecyltriethoxy Examples include, but are not limited to, silane, n-octadecylmethyldimethoxysilane, n-octadecylmethyldiethoxysilane, and the like.

(C) Long-chain fluorinated alkyl group-containing silane compound The long-chain fluorinated alkyl group-containing silane compound represented by the formula [3] contributes to the water repellency of the cured product. In particular, when the coating film of the curable solution is cured, the alkyl fluoride chain is oriented and segregated on the surface of the coating liquid film, so that high water repellency can be expressed on the surface of the cured film. The long-chain fluorinated alkyl group-containing silane compound represented by the formula [3] is also referred to as a first fluorinated alkyl group-containing silane compound.

In Formula [3], Y ¹ represents a linear or branched fluorinated alkyl group having 9 to 25 fluorine atoms and 4 to 14 carbon atoms. In order to effectively impart water repellency by surface segregation, it is preferably a long-chain fluorinated alkyl group having 9 or more total fluorine atoms in the group. However, long-chain fluorinated alkyl groups having a total number of fluorine atoms exceeding 25 are not preferable because the compatibility in the sol composition is remarkably lowered and the sol becomes cloudy.

Specific examples of the long-chain fluorinated alkyl group represented by Y ¹ include 1H, 1H, 2H, 2H-nonafluoro-n-hexyl group, 1H, 1H, 2H, 2H-tridecafluoro-n-octyl group, Examples include, but are not limited to, 1H, 1H, 2H, 2H-heptadecafluorodecyl group, perfluorododecyl-1H, 1H, 2H, 2H- group and the like.

Specific examples of the linear or branched alkyl group having 1 to 6 carbon atoms represented by R ⁵ and R ⁶ in Formula [3] include R ¹ and R ² in Formula [1]. This is the same as the specific examples of the alkyl group described above. Moreover, as with ^{R 1} and ^{R 2} in the formula [1], it is preferred that ^{R 5} and ^{R 6} are methyl and ethyl.
In formula [3], p represents 0 or 1.

  Specific examples of the fluorinated alkyl group-containing silane compound represented by the formula [3] include trimethoxy (1H, 1H, 2H, 2H-nonafluoro-n-hexyl) silane, triethoxy (1H, 1H, 2H, 2H-nonafluoro). -N-hexyl) silane, dimethoxy (1H, 1H, 2H, 2H-nonafluoro-n-hexyl) methylsilane, trimethoxy (1H, 1H, 2H, 2H-tridecafluoro-n-octyl) silane, triethoxy (1H, 1H) , 2H, 2H-tridecafluoro-n-octyl) silane, diethoxy (1H, 1H, 2H, 2H-tridecafluoro-n-octyl) methylsilane, trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) Silane, triethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl Silane, perfluoro dodecyl-1H, IH, 2H, 2H- trimethoxysilane, perfluorododecyl-1H, IH, 2H, but 2H- triethoxysilane, and the like, without limitation.

(Condensation rate)
The sol composition of the present invention contains at least a hydrolysis condensate of (A) a cyclic ether group-containing silane compound, (B) an alkyl group-containing silane compound, and (C) a long-chain fluorinated alkyl group-containing silane compound. . Further, it is important that the condensation rate of the hydrolysis condensate contained in the sol composition of the present invention is 45% or more and 70% or less. In addition, the condensation rate of this hydrolysis-condensation product can be calculated from the peak integrated values of D0 to D2 isomers and T0 to T3 isomers in ²⁹ Si-NMR measurement.
Specifically, the condensation rate is calculated from the following formula [5].

〔式［５］中、Ｄ０乃至Ｄ２は、ゾル組成物の^２９Ｓｉ−ＮＭＲスペクトルにおいて、２官能の有機シラン化合物に帰属されるケイ素原子であって、下記Ｄ０体乃至Ｄ２体に帰属されるケイ素原子のピーク積分値を表す。
Ｄ０体：他のケイ素原子とは酸素を介して結合していないケイ素原子
Ｄ１体：１つのケイ素原子と酸素を介して結合しているケイ素原子
Ｄ２体：２つのケイ素原子と酸素を介して結合しているケイ素原子
Ｔ０乃至Ｔ３は、ゾル組成物の^２９Ｓｉ−ＮＭＲスペクトルにおいて、３官能の有機シラン化合物に帰属されるケイ素原子であって、下記Ｔ０体乃至Ｔ３体に帰属されるケイ素原子のピーク積分値を表す。
Ｔ０体：他のケイ素原子とは酸素を介して結合していないケイ素原子
Ｔ１体：１つのケイ素原子と酸素を介して結合しているケイ素原子
Ｔ２体：２つのケイ素原子と酸素を介して結合しているケイ素原子
Ｔ３体：３つのケイ素原子と酸素を介して結合しているケイ素原子〕

[In the formula [5], D0 to D2 are silicon atoms belonging to the bifunctional organosilane compound in the ²⁹ Si-NMR spectrum of the sol composition, and silicon belonging to the following D0 to D2 forms. Represents the peak integration value of an atom.
D0 body: silicon atom D1 body not bonded to other silicon atoms via oxygen: D1 body: silicon atom bonded to one silicon atom via oxygen D2 body: bonded to two silicon atoms via oxygen In the ²⁹ Si-NMR spectrum of the sol composition, silicon atoms T0 to T3 are silicon atoms belonging to the trifunctional organosilane compound, and silicon atoms belonging to the following T0 to T3 bodies Represents the peak integration value.
T0 body: silicon atom T1 body that is not bonded to other silicon atoms via oxygen: silicon atom T2 body that is bonded to one silicon atom via oxygen T2 body: bonded to two silicon atoms via oxygen Silicon atom T3 body: silicon atom bonded to three silicon atoms through oxygen]

The condensation rate is preferably from 50% to 65%, and more preferably from 50% to 60%. The uniform film-forming property of the curable liquid can be enhanced within the preferable condensation rate range.
When the condensation rate is less than 45%, coating unevenness of the curable liquid is likely to occur, and the uniform film forming property is deteriorated. On the other hand, when the condensation rate exceeds 70%, white turbidity or gelation tends to occur in the sol composition. Moreover, since the viscosity of a sol composition will become high when a condensation rate exceeds 70%, it leads to the fall of the solubility to a curable solution, and the uniform film formability by coating unevenness.

(D) Fluorinated alkyl group-containing silane compound The sol composition of the present invention comprises the silane compounds (A) to (C) and (D) a fluorinated alkyl group-containing silane compound represented by the following formula [4]: It is preferable that it is a hydrolysis-condensation product. The fluorinated alkyl group-containing silane compound represented by the formula [4] is also referred to as a second fluorinated alkyl group-containing silane compound.

〔式中、Ｙ^２はフッ素原子数３乃至８、炭素原子数１乃至６の直鎖又は分枝状のフッ化アルキル基を表す。Ｒ^７及びＲ^８はそれぞれ炭素原子数１乃至６の直鎖又は分枝状のアルキル基を表す。ｑは０又は１を表す。〕

[Wherein Y ² represents a linear or branched fluorinated alkyl group having 3 to 8 fluorine atoms and 1 to 6 carbon atoms. R ⁷ and R ⁸ each represent a linear or branched alkyl group having 1 to 6 carbon atoms. q represents 0 or 1; ]

(D) The fluorinated alkyl group-containing silane compound is different from the (C) fluorinated alkyl group-containing silane compound, and in the fluorinated alkyl group represented by Y ² in the formula [4], the total number of fluorine atoms in the group is 3 to 8, which is a relatively short-chain fluorinated alkyl group.
As described above, (C) the fluorinated alkyl group-containing silane compound is used for surface segregation of the fluorinated alkyl group, whereas (D) the fluorinated alkyl group-containing silane compound exists mainly inside the cured film. The water repellency inside the film can be increased. When the water repellency inside the film is increased, for example, when ink or reaction liquid used in the transfer-type inkjet image forming method comes into contact with the cured product film, the dimensional change or film property due to the permeation diffusion or swelling of the liquid component into the film Can be prevented.

In the formula [4], specific examples of the linear or branched fluorinated alkyl group having 3 to 8 fluorine atoms and 1 to 6 carbon atoms represented by Y ² include a trifluoromethyl group, 2, 2,4-trifluoroethyl group, perfluoroethyl group, 3,3,3-trifluoropropyl group, 2,2,3,3,3-pentafluoropropyl group, perfluoropropyl group, etc. 4-trifluoro-n-butyl group, 6,6,6-trifluoro-n-hexyl group, 4,4,5,5,6,6,6-heptafluoro-n-hexyl group, 6,6, Examples include, but are not limited to, 7,7,8,8,8-heptafluoro-n-octyl group.

Specific examples of the linear or branched alkyl group having 1 to 6 carbon atoms represented by R ⁷ and R ⁸ in the formula [4] include R ¹ and R ² in the formula [1]. This is the same as the specific examples of the alkyl group described above. Moreover, as with ^{R 1} and ^{R 2} in the formula [1], it is preferred that ^{R 7} and ^{R 8} are methyl and ethyl.

In formula [4], q represents 0 or 1, and q is preferably 1. When q is 1, the fluorinated alkyl group-containing silane compound is a bifunctional condensable silane compound monomer having two condensable alkoxy groups represented by OR ⁸ in the formula [4], and the condensate thereof. Becomes a linear one-dimensional polysiloxane. Therefore, for the same reason as described above, the bifunctional monomer is preferable because it can impart a flexible elasticity to the cured product.

  Specific examples of the fluorinated alkyl group-containing silane compound represented by the formula [4] include trifluoromethyltrimethoxysilane, trifluoromethyltriethoxysilane, 3,3,3-trifluoropropyltrimethoxysilane, 3, 3,3-trifluoropropyltriethoxysilane, 3,3,3-trifluoropropylmethyldimethoxysilane, 3,3,3-trifluoropropylmethyldiethoxysilane, perfluoropropyltrimethoxysilane, 4,4,4 , 3,3-pentafluoro-n-butyltrimethoxysilane, 6,6,7,7,8,8,8-heptafluoro-n-octyltrimethoxysilane and the like, but are not limited thereto.

(Ratio of silane compound)
In the method for producing the sol composition of the present invention, the ratio of each silane compound used in the hydrolysis and condensation reaction in the mixture before hydrolysis and condensation is as follows based on the total number of moles of all silane compounds. Preferably there is.
The ratio of the cyclic ether group-containing silane compound represented by the formula [1] in the mixture is preferably 20 mol% or more and 80 mol% or less. In particular, it is more preferably 30 mol% or more and 70 mol% or less, and further preferably 30 mol% or more and 50 mol% or less.
The ratio of the long-chain fluorinated alkyl group-containing silane compound represented by the formula [3] in the mixture is preferably 0.1 mol% or more and 5 mol% or less, and 0.1 mol% or more and 2 mol% or less. It is more preferable that
As the silane compound, a fluorinated alkyl group-containing silane compound represented by the formula [4] can be further used. In that case, the ratio of the fluorinated alkyl group-containing silane compound represented by the formula [4] in the mixture is preferably 1 mol% or more and 50 mol% or less, and more preferably 3 mol% or more and 25 mol% or less. preferable.
The ratio of the alkyl group-containing silane compound represented by the formula [2] in the mixture is adjusted so that the silane compound represented by the formulas [1], [3], and [4] is within the above preferable range. As appropriate, it can be adjusted.
In the range of the above silane compound monomer ratio, a sol composition that hardly causes white turbidity or gelation is obtained, and the flexibility, strength, and water repellency after curing are good. In particular, it is easy to adjust the water repellency of the cured product to an appropriate range by setting the ratio of (C) the long-chain fluorinated alkyl group-containing silane compound within the above range.
Moreover, it is preferable that the ratio of each unit contained in a hydrolysis-condensation product is as follows on the basis of the total number of moles of the unit derived from all the silane compounds.
It is preferable that the hydrolysis-condensation product contains 20 mol% or more and 80 mol% or less of a unit derived from the cyclic ether group-containing silane compound represented by the formula [1]. In particular, it is more preferably 30 mol% or more and 70 mol% or less, and further preferably 30 mol% or more and 50 mol% or less.
It is preferable that the hydrolysis-condensation product contains 0.1 to 5 mol% of a unit derived from a long-chain fluorinated alkyl group-containing silane compound represented by the formula [3]. In particular, it is more preferable to contain 0.1 mol% or more and 2 mol% or less.
The hydrolysis condensate preferably contains 1 mol% or more and 50 mol% or less of a unit derived from a fluorinated alkyl group-containing silane compound represented by the formula [4]. In particular, it is more preferable to contain 3 mol% or more and 25 mol% or less.

<Method for producing sol composition>
The method for producing a sol composition of the present invention comprises a step of mixing the silane compound (A) to (C), preferably (D), and an organic acid to obtain a mixture, and hydrolyzing the mixture. And a condensation addition to obtain a sol composition.
In this production method, the hydrolysis and condensation reaction of the silane compound is preferably performed at a content of the organic acid in the mixture of 250 ppm to 1000 ppm based on the total mass of the mixture.
Among the silane compounds (A) to (D), the reactivity of the (B) alkyl group-containing silane compound is often higher than that of other silane compounds. However, in the range where the organic acid content is 250 ppm or more and 1000 ppm or less, it is difficult for a single reaction to occur only with an alkyl group-containing silane compound, and a high degree of control of the reaction is possible, and the sol composition does not cause cloudiness or gelation. You can get things.
Furthermore, in the range where the content of the organic acid is 250 ppm or more and 1000 ppm or less, the cyclic ether group in the silane compound (A) is prevented from opening and deactivating due to side reactions during hydrolysis and condensation. Can do.

Specific examples of the organic acid used as the catalyst include, but are not limited to, carboxylic acids such as formic acid, acetic acid, and propionic acid. Acetic acid is preferred as the organic acid used as the catalyst.
When an inorganic acid or inorganic base is used as a catalyst, the inorganic salt remains in the sol composition and further in the cured product unless the synthesized sol composition is removed by washing with water or the like. There is concern that it will affect various physical properties. If an organic acid that is liquid at least at room temperature is used at a very small concentration of 1000 ppm or less, there is an advantage that the organic acid volatilizes at the time of heat curing and does not remain in the final cured product film.

  In the method for producing a sol composition of the present invention, the cohydrolysis reaction of the silane compound monomer is preferably performed in the presence of water. The amount of water used is preferably such that the reaction is carried out in the presence of 1.0 to 2.0 times the amount of water with respect to the hydrolyzable alkoxy group in the silane compound. More preferably, it is carried out in the presence of 1.2 to 1.8 times the amount of water with respect to the hydrolyzable alkoxy group.

<Transfer>
As an image recording method using ink, an ink image is formed by applying ink to an image forming surface of a transfer body using an ink jet device, and the formed ink image is transferred to a recording medium by contacting the recording medium. A transfer type ink jet recording method is known. It is preferable that the transfer body used in this image recording method has a property that the ink image is easily peeled off on the surface thereof, that is, a good ink image transfer property. Further, for the purpose of holding an ink image formed on the transfer body, a liquid that reduces the fluidity of the ink by contacting the ink with the transfer body before applying the ink (hereinafter referred to as “reaction liquid”). Is preferably given.

FIG. 1 shows the configuration of a transfer body for transfer type inkjet recording according to an embodiment of the present invention. The transfer body 1 has a surface layer portion 2, and the image forming surface of the transfer body 1 is the surface of the surface layer portion 2 (the surface of the transfer body). An ink image is formed on the image forming surface by applying ink using an inkjet device. Hereinafter, the ink image formed on the transfer body is also referred to as an intermediate image.
The transfer body of the present invention may be a single layer or a plurality of layers. When composed of a plurality of layers, the surface layer portion can be provided on the side closest to the image forming surface of the transfer body as a thick layer. Here, FIG. 2 shows a configuration example when the transfer body is composed of a plurality of layers. The transfer body 1 may have an elastic layer 3, a compression layer 4, and a base material 5 in this order under the surface layer portion 2 on the image forming surface side (front surface side). Hereinafter, each layer of the transfer body will be described.

[Surface part]
The surface layer portion in the transfer body of the present invention is a portion including an image forming surface located on the outermost surface of the transfer body on the image forming surface side, and a layer may be formed like a surface layer. The surface layer portion has a surface with good peelability from the intermediate image. On the other hand, in order to form a good intermediate image with ink, the surface of the transfer body also needs moderate hydrophilicity.
In addition, in the transfer body for transfer type inkjet recording, it is necessary to impart flexibility to the surface of the transfer body and improve the shape followability to the surface of the recording medium for good transferability. Durability against contact with the recording medium is also required. Therefore, the surface of the transfer body needs to have appropriate flexibility.

  The surface layer part in the transfer body of the present invention is formed by a cured product of a sol composition containing the hydrolysis condensate of the organosilane compound of the present invention described above. Specifically, a curable solution obtained by mixing a sol composition, a polymerization initiator for a cyclic ether group contained in the sol composition, and other additives as necessary, and a solvent, exposure and / or It is a cured product cured by heating. By using the cured product formed of the sol composition of the present invention for the surface layer part, it is possible to impart appropriate water repellency, flexibility and strength to the surface of the transfer body, and excellent transferability and durability. A transfer body for transfer ink jet recording can be provided.

  In the cured product constituting the surface layer part, the sol composition of the present invention is preferably contained in an amount of 10% by mass or more and 100% by mass or less as a solid content after dehydration condensation, and is 20% by mass or more and 100% by mass. It is more preferable to contain below.

Further, by adjusting the kind and amount of the additive, various functions can be imparted to the physical properties of the surface of the transfer body. For example, a compound having a polyether oxide unit may be added to impart flexibility, and an inorganic filler having a high thermal conductivity may be added to increase thermal conductivity. The addition amount of the additive is preferably 0.1% by mass or more and 90% by mass or less, and more preferably 5% by mass or more and 70% by mass or less based on the solid content after dehydration condensation of the sol composition.
As the polymerization initiator, a known photocationic polymerization initiator, thermal cationic polymerization initiator, or the like may be used for polymerization of a cyclic ether group.

  As a method for forming the surface layer portion, a known method can be used. For example, it can be formed by applying the curable solution by spin coating, slit coating, bar coating, or the like, forming a film, and exposing to heat and curing.

  The thickness of the surface layer part is preferably 0.1 μm or more and 30 μm or less. If the thickness of the surface layer portion is 0.1 μm or more, it becomes easy to form the outermost surface layer uniformly on the surface of the transfer body. Moreover, if the thickness of the surface layer portion is 30 μm or less, the internal stress during deformation does not become excessively large, and the effects of the present invention can be sufficiently obtained. The thickness of the surface layer portion is more preferably 1 μm or more and 10 μm or less, and in this range, the followability to the surface shape of the recording medium at the time of transfer is ensured, and better transferability can be obtained.

  Regarding the flexibility of the surface layer part, the storage elastic modulus of the surface layer part in the transfer body of the present invention is preferably 20 MPa or more and 100 MPa or less for the storage elastic modulus which is a spring elastic modulus component of the viscoelastic body. When the storage elastic modulus is within the above range, it is possible to suppress the occurrence of cracks during repeated transfer and the abrasion of the surface layer portion due to contact with the recording medium. The storage elastic modulus of the surface layer portion is more preferably 20 MPa or more and 50 MPa or less, and in this case, very high durability is obtained.

In addition, regarding the loss tangent (tan δ = loss elastic modulus / storage elastic modulus) used as an easy to plastic deformation or brittleness index of the viscoelastic body, the loss tangent of the surface layer portion of the transfer body is 0.100 or less. It is preferable. When the loss tangent is 0.100 or less, generation of cracks during repeated transfer can be suppressed. The loss tangent of the surface layer portion is preferably 0.050 or less, and in this case, extremely high durability is obtained. Although there is no restriction | limiting in particular about the lower limit of the loss tangent of a surface layer part, For example, it can be set to 0.001 or more.
The storage elastic modulus and loss tangent are values obtained by measuring the dynamic viscoelasticity of a thin film with a nanoindenter, using a Berkovich diamond indenter under a load of 40 μN, a frequency of 150 Hz, and room temperature (25 ° C.). It is.

  In order to improve the wettability of the reaction solution, image quality, transferability, etc., surface treatment may be applied to the surface layer portion. Examples of the surface treatment include flame treatment, corona treatment, plasma treatment, polishing treatment, roughening treatment, active energy ray irradiation treatment, ozone treatment, surfactant treatment, and silane coupling treatment. A plurality of these may be combined. Furthermore, you may provide arbitrary surface shapes in a surface layer part.

[Elastic layer]
The elastic layer is a layer having an elastic body that may be sandwiched between the surface layer portion and the compression layer. By providing the elastic layer, the followability to the concavo-convex shape of the surface of the recording medium on the surface of the surface layer portion of the transfer body at the time of transfer becomes good. Moreover, even when the surface irregularity shape of the compression layer is large, the elastic layer is formed on the compression layer, thereby contributing to smoothing the surface of the transfer body.

  As the material for the elastic layer, various materials such as resin and ceramic can be used as appropriate. The elastic layer may be composed of a plurality of layers made of different materials and compositions. From the viewpoint of processing characteristics and the like, various elastomer materials and rubber materials are preferably used. Specifically, for example, silicone rubber, fluorosilicone rubber, phenyl silicone rubber, fluorine rubber, chloroprene rubber, urethane rubber, nitrile rubber, ethylene propylene rubber, natural rubber, styrene rubber, isoprene rubber, butadiene rubber, ethylene / propylene / diene rubber And nitrile butadiene rubber. Among these, silicone rubber, fluorosilicone rubber, and phenyl silicone rubber are preferable in terms of dimensional stability and durability because they have a small compression set, and also have high heat resistance and a small temperature change in elastic modulus. This is also preferable. In addition, ethylene / propylene / diene rubber has high tear strength and a large elongation at break, and therefore is preferably used from the viewpoint of suppressing cracks in the surface layer portion. The elastic layer preferably contains a total of 10% by mass or more and 100% by mass or less of these resins, ceramics, and rubbers, more preferably 30% by mass or more and 100% by mass or less, and 50% by mass. More preferably, the content is 100% by mass or less.

  The thickness of the elastic layer is preferably 0.01 mm or more and 1.0 mm or less, and more preferably 0.05 mm or more and 0.5 mm or less.

  Moreover, the hardness of the elastic body used for the elastic layer is preferably 20 degrees or more and 80 degrees or less, more preferably 30 degrees or more and 60 degrees or less in terms of durometer type A (JIS K 6253 compliant) hardness. . By setting the hardness of the elastic body to 20 degrees or more, large deformation of the elastic layer can be suppressed and good followability of the surface layer portion with respect to deformation of the elastic layer can be ensured. In addition, by setting the hardness of the elastic body to 80 degrees or less, local stress applied to the surface layer portion can be sufficiently relaxed by the elastic layer, particularly during high-speed transfer, and the crack resistance and transferability of the transfer body can be reduced. Can be increased.

[Compression layer]
The compressed layer is a layer having a function of absorbing pressure fluctuation. By providing the compression layer, the compression layer absorbs deformation, disperses the fluctuations with respect to local pressure fluctuations, and can maintain good transferability even during high-speed printing.

  Examples of the material for the compression layer include acrylonitrile-butadiene rubber, acrylic rubber, chloroprene rubber, urethane rubber, and silicone rubber. The compression layer may be composed of a plurality of layers made of different materials and compositions. The compression layer preferably contains 10 to 100% by mass of these rubbers in total, more preferably 30 to 100% by mass, and more preferably 50 to 100% by mass. It is more preferable to contain. Further, when molding the rubber material, a predetermined amount of vulcanizing agent, vulcanization accelerator and the like are blended, and further, a foaming agent such as an antifoaming agent, hollow fine particles or salt is blended as necessary to make a porous material. Those are preferred. Thereby, since the bubble part is compressed with a volume change with respect to various pressure fluctuations, deformation in the direction other than the compression direction is small, and more stable transferability and durability can be obtained. The porous rubber material includes a continuous pore structure in which the pores are continuous with each other and an independent pore structure in which the pores are independent from each other. In the present invention, any structure may be used, and these structures may be used in combination.

  The hardness of the rubber used for the compression layer is a durometer type A (JIS K 6253 compliant) hardness, preferably 20 degrees or more and 80 degrees or less, and more preferably 20 degrees or more and 60 degrees or less. If the hardness of the rubber is 20 degrees or more, the restoring property of the transfer body does not deteriorate, and it becomes easy to obtain the pressure necessary for transfer. If the hardness of the rubber is 80 degrees or less, it is possible to prevent the transfer body from being damaged due to scratches or the like when a foreign object is sandwiched or when a recording medium is double fed.

  The thickness of the compressed layer is preferably 0.1 mm or more and 5.0 mm or less, and more preferably 0.2 mm or more and 2.0 mm or less. If the thickness of the compression layer is 0.1 mm or more, sufficient compression characteristics can be obtained even when the transfer pressure is high. Further, when the thickness of the compression layer is 5.0 mm or less, distortion in the shear direction during transfer is not increased, and deterioration in image quality can be suppressed.

[Base material]
The base material is provided in order to increase the strength of the transfer body in the planar direction and to improve the handleability of the transfer body to be mounted on the ink jet recording apparatus. Examples of materials used for the substrate include metal materials such as aluminum, iron, and stainless steel; resin materials such as acetal resin, epoxy resin, polyimide, polyethylene, polyethylene terephthalate, nylon, and polyurethane; woven fabric, nonwoven fabric, felt, and the like Examples thereof include cloth materials. Moreover, it is also preferable to use these in combination. As the substrate, a film-like substrate can be preferably used in accordance with the form of the recording apparatus to be applied or the transfer mode to the recording medium.

  The thickness of the substrate is preferably from 0.01 mm to 5 mm, and more preferably from 0.05 mm to 3 mm. If the thickness of the substrate is 0.01 mm or more, the strength required for use as a transfer body can be ensured. Moreover, if the thickness of the base material is 5 mm or less, the bendability is also maintained, and the handling property is high in mounting and transportation to the recording apparatus.

  Various adhesives and double-sided tapes for fixing and holding these may be used between the elastic layer and the compression layer, or between the compression layer and the substrate. Further, a reinforcing layer may be provided by a film, a woven fabric, or the like in order to suppress lateral elongation when the recording apparatus is mounted or to maintain stiffness. The transfer body can also be produced by arbitrarily combining the layers made of the above materials.

  The size of the transfer body can be freely selected according to the target print image size. Examples of the overall shape of the transfer member include a sheet shape, a roller shape, a drum shape, a belt shape, and an endless web shape.

<Transfer type ink jet recording apparatus and transfer type ink jet recording method>
One embodiment of a transfer type ink jet recording apparatus according to the present invention is shown in FIG. This transfer type ink jet recording apparatus includes a transfer body 11 of the present invention having an image forming surface, an ink jet device 15 as an ink application device, a roller type coating device 14 as a reaction liquid application device, and a transfer pressing member ( Transfer pressure roller) 18. The pressure roller 18 and the transfer body 11 constitute an intermediate image (ink image) transfer device. The inkjet device 15 has an inkjet recording head that ejects ink. Further, the transfer type ink jet recording apparatus may have a cleaning member 19 for cleaning the surface of the transfer body 11 after the transfer, if necessary.

The transfer type inkjet recording method according to the present invention includes the following steps.
A step of forming an intermediate image (ink image) by applying ink using an inkjet device on the transfer body (intermediate image forming step).
A process of transferring the intermediate image from the transfer body to the recording medium (transfer process).

  Specifically, image recording (image formation) by the transfer inkjet recording method according to the present invention can be performed by the following operation using the transfer inkjet recording apparatus. The reaction liquid is applied to the image forming surface on the transfer body 11 by a coating roller included in the roller-type coating device 14. An intermediate image is formed by applying ink using the inkjet device 15 to the image forming surface on the transfer body 11 to which the reaction liquid has been applied. Then, the intermediate image formed on the transfer body 11 is brought into contact with the recording medium 17 while being pressed by the pressing roller 18 to transfer the intermediate image to the recording medium.

The transfer body 11 of the present invention can be installed on the support member 12. The support member 12 is driven to rotate in the direction of the arrow about the rotation shaft 13 of the support member, and each device disposed in the periphery operates in synchronization with the rotation. Specifically, the reaction liquid applying device 14 sequentially applies the reaction liquid and the ink applying device 15 to the moving transfer body 11, and an intermediate image (ink image) is formed on the transfer body. The intermediate image formed on the transfer body 11 is moved to the transfer portion in contact with the recording medium by the movement of the transfer body 11. While the intermediate image is in contact with the recording medium, the pressing member 18 presses the transfer body 11 through the recording medium, whereby the intermediate image is transferred onto the recording medium.
The transfer body 11 is supported on a support member 12. As a method for supporting the transfer body 11, various adhesives and double-sided tapes may be used. Alternatively, the transfer body 11 may be supported on the support member 12 by using an installation member by attaching an installation member made of metal, ceramic, resin, or the like to the transfer body 11.
The support member is required to have a certain degree of structural strength from the viewpoint of conveyance accuracy and durability. As the material of the support member, metal, ceramic, resin, or the like is preferably used. Among them, in addition to rigidity and dimensional accuracy that can withstand pressurization during transfer, in order to reduce inertia during operation and improve control responsiveness, the following are preferably used.
For example, metal materials such as aluminum, iron, and stainless steel; resin materials such as acetal resin, epoxy resin, polyimide, polyethylene, polyethylene terephthalate, nylon, and polyurethane; ceramic materials such as silica ceramics and alumina ceramics. Moreover, it is also preferable to use these in combination. As the support member, for example, a roller-like or belt-like member can be preferably used in accordance with the form of the recording apparatus to be applied or a transfer mode to the recording medium. The use of a drum-shaped support member or a belt-shaped endless web structure support member makes it possible to repeatedly use the same transfer body, which is extremely preferable from the viewpoint of productivity.

[Reaction solution application process]
The transfer type inkjet recording method of the present invention preferably further includes a step of applying a reaction liquid onto the transfer body (reaction liquid applying step) in order to form a good ink image. Further, it is preferable to apply a reaction liquid to the transfer body before applying ink. When the reaction liquid comes into contact with the ink, the fluidity of a part of the ink and / or ink composition on the transfer body is lowered, and bleeding and beading during image formation by the ink can be suppressed. . Specifically, a reactant (also referred to as an ink thickening component) contained in the reaction liquid reacts chemically when it comes into contact with a color material or resin that is a part of the composition constituting the ink. Or physically adsorbed. This causes an increase in the viscosity of the ink as a whole, and a local increase in viscosity due to agglomeration of some of the components constituting the ink, such as the color material, resulting in a partial fluidity of the ink and / or ink composition. Can be reduced. As a method for applying the reaction solution, various conventionally known methods can be appropriately used. For example, die coating, blade coating, gravure roller, or a combination of these with an offset roller can be used. Moreover, it is also preferable to use an inkjet device as a method which can provide a reaction liquid at high speed and with high precision.

<Reaction solution>
Hereinafter, each component which comprises the reaction liquid applied to this embodiment is demonstrated in detail.
(Reactant)
The reaction liquid agglomerates a component (resin, self-dispersing pigment, etc.) having an anionic group in the ink by contacting with the ink, and contains a reactive agent. Examples of the reactive agent include cationic components such as polyvalent metal ions and cationic resins, and organic acids.
Examples of the polyvalent metal ion include divalent metal ions such as Ca ²⁺ , Cu ²⁺ , Ni ²⁺ , Mg ²⁺ , Sr ²⁺ , Ba ²⁺ and Zn ²⁺ , Fe ³⁺ , Cr ³⁺ , Y ³⁺ and Al ^3+. Of the trivalent metal ions. In order to contain a polyvalent metal ion in the reaction solution, a polyvalent metal salt (which may be a hydrate) constituted by combining a polyvalent metal ion and an anion can be used. Examples of the anion include Cl ⁻ , Br ⁻ , I ⁻ , ClO ⁻ , ClO ₂ ⁻ , ClO ₃ ⁻ , ClO ₄ ⁻ , NO ₂ ⁻ , NO ₃ ⁻ , SO ₄ ²⁻ , CO ₃ ²⁻ , HCO _3. ⁻ , PO ₄ ³⁻ , HPO ₄ ²⁻ , and inorganic anions such as H ₂ PO ₄ ⁻ ; HCOO ⁻ , (COO ⁻ ) ₂ , COOH (COO ⁻ ), CH ₃ COO ⁻ , C ₂ H ₄ (COO ⁻ ) ₂ , organic anions such as C ₆ H ₅ COO ⁻ , C ₆ H ₄ (COO ⁻ ) ₂ and CH ₃ SO ₃ ^— . When a polyvalent metal ion is used as the reactant, the content (% by mass) in terms of the polyvalent metal salt in the reaction solution is 1.00% by mass or more and 20.00% by mass or less based on the total mass of the reaction solution. Preferably there is.
The reaction solution containing an organic acid has a buffering ability in an acidic region (pH less than 7.0, preferably pH 2.0 to 5.0), thereby converting an anionic group of a component present in the ink into an acid form. Aggregates. Examples of organic acids include formic acid, acetic acid, propionic acid, butyric acid, benzoic acid, glycolic acid, lactic acid, salicylic acid, pyrrole carboxylic acid, furan carboxylic acid, picolinic acid, nicotinic acid, thiophene carboxylic acid, levulinic acid, and coumarin acid. Monocarboxylic acids and salts thereof; oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, itaconic acid, sebacic acid, phthalic acid, malic acid, tartaric acid, dicarboxylic acids, and the like Examples thereof include salts and hydrogen salts; tricarboxylic acids such as citric acid and trimellitic acid and salts and hydrogen salts thereof; tetracarboxylic acids such as pyromellitic acid and salts and hydrogen salts thereof. The content (% by mass) of the organic acid in the reaction solution is preferably 1.00% by mass or more and 50.00% by mass or less.
Examples of the cationic resin include a resin having a primary to tertiary amine structure and a resin having a quaternary ammonium salt structure. Specific examples include resins having a structure such as vinylamine, allylamine, vinylimidazole, vinylpyridine, dimethylaminoethyl methacrylate, ethyleneimine, and guanidine. In order to enhance the solubility in the reaction solution, a cationic resin and an acidic compound can be used in combination, or a quaternization treatment of the cationic resin can be performed. When a cationic resin is used as the reactant, the content (% by mass) of the cationic resin in the reaction solution may be 1.00% by mass or more and 10.00% by mass or less based on the total mass of the reaction solution. preferable.
(Ingredients other than reactants)
As the components other than the reactants, the same materials as the aqueous medium and other additives mentioned above as those that can be used in the ink can be used.

[Intermediate image forming process]
In this step, ink is applied by the inkjet device 15 to the image forming surface of the transfer body 11 to which the reaction liquid has been applied, and an intermediate image is formed. As an inkjet device, for example, an ink is ejected by forming a bubble by causing film boiling in the ink by an electro-thermal converter, a form in which the ink is ejected by an electro-mechanical converter, and an ink using static electricity. The form etc. which discharge are mentioned. In order to perform high-density printing at high speed, a form using an electro-thermal converter is preferably used as an ink jet device. There is no restriction | limiting in particular as a form of the whole inkjet device. Line head type head in which ink discharge ports are arranged in the moving direction of the transfer body (axial direction in the case of a drum shape), or shuttle type head that performs recording while scanning the head perpendicular to the moving direction of the transfer body Can also be used.

<Ink>
Hereafter, each component which comprises the ink applied to this embodiment is demonstrated in detail.
(Color material)
As the color material, pigments and dyes can be used. The content of the coloring material in the ink is preferably 0.5% by mass or more and 15.0% by mass or less, and 1.0% by mass or more and 10.0% by mass or less based on the total mass of the ink. Is more preferable.
Specific examples of the pigment include inorganic pigments such as carbon black and titanium oxide; organic pigments such as azo, phthalocyanine, quinacridone, isoindolinone, imidazolone, diketopyrrolopyrrole and dioxazine.
As a dispersion method of the pigment, a resin dispersion pigment using a resin as a dispersant, a self-dispersion pigment in which a hydrophilic group is bonded to the particle surface of the pigment, or the like can be used. Further, a resin-bonded pigment in which an organic group containing a resin is chemically bonded to the pigment particle surface, a microcapsule pigment in which the surface of the pigment particle is coated with a resin, or the like can be used.
As the resin dispersant for dispersing the pigment in the aqueous medium, it is preferable to use a resin dispersant that can disperse the pigment in the aqueous medium by the action of the anionic group. As the resin dispersant, a resin as described later can be preferably used, and a water-soluble resin can be more preferably used. The content (mass%) of the pigment is a mass ratio with respect to the content of the resin dispersant (pigment / resin dispersant), and is preferably 0.3 times or more and 10.0 times or less.
As the self-dispersing pigment, a pigment in which an anionic group such as a carboxylic acid group, a sulfonic acid group, or a phosphonic acid group is bonded to the pigment particle surface directly or through another atomic group (-R-) is used. be able to. The anionic group may be either an acid type or a salt type, and when it is a salt type, it may be either partially dissociated or completely dissociated. Examples of the cation serving as a counter ion when the anionic group is a salt type include alkali metal cations; ammonium; organic ammonium. Specific examples of other atomic groups (—R—) include linear or branched alkylene groups having 1 to 12 carbon atoms; arylene groups such as phenylene groups and naphthylene groups; carbonyl groups; imino groups; amide groups. Sulfonyl group; ester group; ether group and the like. Moreover, it is good also as group which combined these groups.
As the dye, one having an anionic group is preferably used. Specific examples of the dye include dyes such as azo, triphenylmethane, (aza) phthalocyanine, xanthene, and anthrapyridone.
(resin)
The ink can contain a resin. The content (% by mass) of the resin in the ink is preferably 0.1% by mass or more and 20.0% by mass or less, and 0.5% by mass or more and 15.0% by mass or less based on the total mass of the ink. More preferably.
The resin may be added to the ink for the purpose of (i) stabilizing the dispersion state of the pigment, that is, as the above-described resin dispersant and its auxiliary, (ii) improving various characteristics of the recorded image. it can. Examples of the form of the resin include a block copolymer, a random copolymer, a graft copolymer, and combinations thereof. Further, the resin may be in a state of being dissolved as a water-soluble resin in an aqueous medium, or in a state of being dispersed as resin particles in an aqueous medium. The resin particles do not have to include a color material.
In the present invention, that the resin is water-soluble means that, when the resin is neutralized with an alkali equivalent to the acid value, it does not form particles whose particle diameter can be measured by a dynamic light scattering method. To do. Whether or not the resin is water-soluble can be determined according to the following method. First, a liquid (resin solid content: 10% by mass) containing a resin neutralized with an alkali corresponding to an acid value (sodium hydroxide, potassium hydroxide, etc.) is prepared. Next, the prepared liquid is diluted 10 times (volume basis) with pure water to prepare a sample solution. And when the particle diameter of resin in a sample solution is measured by a dynamic light scattering method, when the particle | grains which have a particle diameter are not measured, it can be judged that the resin is water-soluble. The measurement conditions at this time can be set, for example, as SetZero: 30 seconds, the number of measurements: 3 times, and the measurement time: 180 seconds. As the particle size distribution measuring apparatus, a particle size analyzer (for example, trade name “UPA-EX150”, manufactured by Nikkiso) using a dynamic light scattering method can be used. Of course, the particle size distribution measuring apparatus and measurement conditions to be used are not limited to the above.
The acid value of the resin is preferably from 100 mgKOH / g to 250 mgKOH / g in the case of a water-soluble resin, and preferably from 5 mgKOH / g to 100 mgKOH / g in the case of a resin particle. The weight average molecular weight of the resin is preferably 3,000 to 15,000 in the case of a water-soluble resin, and preferably 1,000 to 2,000,000 in the case of a resin particle. The volume average particle diameter of the resin particles measured by a dynamic light scattering method (measurement conditions are the same as described above) is preferably 100 nm or more and 500 nm or less.
Examples of the resin include acrylic resins, urethane resins, and olefin resins. Of these, acrylic resins and urethane resins are preferable.
As acrylic resin, what has a hydrophilic unit and a hydrophobic unit as a structural unit is preferable. Among these, a resin having a hydrophilic unit derived from (meth) acrylic acid and a hydrophobic unit derived from at least one of a monomer having an aromatic ring and a (meth) acrylic acid ester monomer is preferable. In particular, a resin having a hydrophilic unit derived from (meth) acrylic acid and a hydrophobic unit derived from at least one monomer of styrene and α-methylstyrene is preferable. Since these resins are likely to interact with the pigment, they can be suitably used as a resin dispersant for dispersing the pigment.
The hydrophilic unit is a unit having a hydrophilic group such as an anionic group. The hydrophilic unit can be formed, for example, by polymerizing a hydrophilic monomer having a hydrophilic group. Specific examples of hydrophilic monomers having a hydrophilic group include acidic monomers having a carboxylic acid group such as (meth) acrylic acid, itaconic acid, maleic acid and fumaric acid, and anions such as anhydrides and salts of these acidic monomers. And the like monomer. Examples of the cation constituting the salt of the acidic monomer include ions such as lithium, sodium, potassium, ammonium, and organic ammonium. The hydrophobic unit is a unit having no hydrophilic group such as an anionic group. The hydrophobic unit can be formed, for example, by polymerizing a hydrophobic monomer having no hydrophilic group such as an anionic group. Specific examples of the hydrophobic monomer include monomers having an aromatic ring such as styrene, α-methylstyrene, benzyl (meth) acrylate; methyl (meth) acrylate, butyl (meth) acrylate, (meth) acrylic acid 2 -(Meth) acrylic acid ester monomers such as ethylhexyl.
As a urethane-type resin, it can obtain by making polyisocyanate and a polyol react, for example. Further, it may be further reacted with a chain extender. Examples of the olefin resin include polyethylene and polypropylene.
(Aqueous medium)
The ink can contain water or an aqueous medium that is a mixed solvent of water and a water-soluble organic solvent. As water, deionized water or ion exchange water is preferably used. The content (% by mass) of water in the aqueous ink is preferably 50.0% by mass or more and 95.0% by mass or less based on the total mass of the ink. The content (% by mass) of the water-soluble organic solvent in the aqueous ink is preferably 3.0% by mass or more and 50.0% by mass or less based on the total mass of the ink. As the water-soluble organic solvent, any of those usable for ink-jet inks such as alcohols, (poly) alkylene glycols, glycol ethers, nitrogen-containing compounds and sulfur-containing compounds can be used.
(Other additives)
In addition to the above-mentioned components, the ink has various antifoaming agents, surfactants, pH adjusting agents, viscosity adjusting agents, rust preventives, antiseptics, antifungal agents, antioxidants, anti-reducing agents, etc. The additive may be contained.

[Drying process]
The transfer type inkjet recording method according to the present invention may have a drying step for reducing the liquid content from the formed intermediate image. In the transfer type inkjet recording apparatus shown in FIG. 3, the liquid content is reduced from the intermediate image by heating using the heater 16. If the liquid content of the intermediate image is excessive, excess liquid may overflow or overflow in the next transfer process. As a result, the intermediate image may be disturbed or transferability may be deteriorated. As a method for removing the liquid component, any of various commonly used methods can be preferably applied. For example, a method by heating, a method of blowing low-humidity air, a method of reducing pressure, a method of contacting an absorber, and the like can be mentioned. A plurality of these may be combined. Or it is also possible to dry by natural drying.

[Transfer process]
After the drying step, the intermediate image is brought into contact with the recording medium, and a printed matter on which the final image is recorded is obtained by a transfer step in which the intermediate image is transferred from the image forming surface of the transfer body to the recording medium. The recording medium in the present invention includes not only plain paper and glossy paper used in general printing but also widely includes cloth, plastic, film and other printing media. When the intermediate image comes into contact with the recording medium, it is preferable that the intermediate image is efficiently transferred to the recording medium by pressing the recording medium toward the transfer body with the pressing roller 18. It is also preferable to press in multiple stages because good transferability can be obtained.

[Cleaning process]
The transfer body may be used repeatedly and continuously from the viewpoint of productivity. In that case, it is preferable to carry out a cleaning step of cleaning and regenerating the surface of the transfer member with a cleaning roller or the like before the next image formation. In the transfer type ink jet recording apparatus shown in FIG. 3, the cleaning roller 19 cleans and regenerates the surface of the transfer body. As a means for performing cleaning, any of various commonly used methods can be preferably applied. For example, a method of applying a cleaning liquid in a shower form, a method of wiping a wet Molton roller in contact with the surface, a method of contacting the surface of the cleaning liquid, a method of scraping with a wiper blade, a method of applying various energy, and the like. A plurality of these may be combined.

Examples of the present invention and comparative examples will be described below.
<Synthesis of sol composition>
Using (A) cyclic ether group-containing silane compound, (B) alkyl group-containing silane compound, (C) long-chain fluorinated alkyl group-containing silane compound, and (D) fluorinated alkyl group-containing silane compound shown in Table 1 below The sol composition was synthesized as follows.

[Example 1] (Synthesis of sol composition S01)
Each silane compound, acetic acid, and water shown below were mixed, and the resulting mixture was heated at 80 ° C. for 6 hours to obtain a sol composition S1.
・ A1 86.94g (25mol%)
・ B1 153.64g (74mol%)
・ C3 7.15g (1mol%)
・ Acetic acid 0.162g (500ppm)
・ Water 75.98 g (1.5 mol / SiOR)
Here, mol / SiOR indicating the water addition ratio is defined as the number of moles of water added per 1 mol of hydrolyzable alkoxy groups in the silane compound.
²⁹ Si-NMR measurement of S1 was performed in 100 MHz and CDCl ₃ solvent, and the condensation rate was calculated from the peak integration value of the spectrum, which was 70%.

[Examples 2 to 26] (Synthesis of sol compositions S02 to S26)
Similarly to the synthesis of the sol composition S01 of Example 1, the sol compositions S02 to S02 in the amount ratio of each silane compound, acetic acid, and water shown in Table 2 below, with the reaction temperature and reaction time shown in Table 2 below. S26 was synthesized. For each sol composition, the condensation ratio calculated from ²⁹ Si-NMR measurement is shown in Table 2.

[Comparative Examples 1 to 8] (Synthesis of Comparative Sol Compositions H01 to H08)
Comparative sol composition H01 in the amount ratio of each silane compound, acetic acid and water shown in Table 2 above, at the reaction temperature and reaction time shown in Table 2 below, as in the synthesis of sol composition S01 of Example 1. To H08 were synthesized. For each sol composition, the condensation rate calculated from ⁹ Si-NMR measurement is shown in Table 2.

<Production and evaluation of transfer body>
Subsequently, a transfer body was produced using the obtained sol composition and evaluated.
[Example 27] (Production and Evaluation of Transfer T01)
CPI-410S (trade name, manufactured by San Apro Co., Ltd.), an additive EO ((bistriethoxysilylpropyl) polyethylene oxide), which is a photocationic polymerization initiator as a sol composition and a photopolymerization initiator, at the ratios shown below. And a solvent were mixed and stirred to obtain a curable solution.
-S01 40.0 parts by mass-CPI-410S 0.6 parts by mass-EO 7.0 parts by mass-PGMEA 2.4 parts by mass-Ethanol 40.0 parts by mass-Isobutyl acetate 10.0 parts by mass

Subsequently, a laminate having an elastic layer having a thickness of 200 μm formed by silicone rubber having a rubber hardness (durometer type A hardness) of 40 degrees on a PET (polyethylene terephthalate) film having a thickness of 0.05 mm as a base material. Prepared. Next, atmospheric pressure plasma treatment was performed on the surface of the elastic layer of the laminate. Then, on the surface of the elastic layer of the laminate subjected to the atmospheric pressure plasma treatment, the surface layer portion forming coating solution was applied by slit coating to form a film. Thereafter, the coating liquid for forming the surface layer portion is exposed by irradiating with a UV lamp (exposure amount: 1.74 J / cm ² ), and further heated at 150 ° C. for 2 hours, the above-mentioned The coating liquid was cured to obtain a transfer body T01 having a surface layer portion (surface layer) constituting the image forming surface.
When the cured product film thickness of the surface layer portion of the obtained transfer body T01 was measured with an optical interference film thickness meter, the film thickness variation σ in n20 measurement was 253 nm. Further, when the contact angle of pure water was measured on the surface of the obtained transfer member T01, it was 93 °.

Next, the obtained transfer body T01 was subjected to the following evaluation using the transfer type inkjet recording apparatus shown in FIG. A cylindrical drum made of an aluminum alloy was used as the support member 12 for the transfer body.
First, the reaction liquid was continuously applied to the surface of the transfer body using a roller type coating device. As the reaction solution, a reaction solution having the following composition was used.
-Citric acid 30.0 parts by mass-Potassium hydroxide 3.5 parts by mass-Glycerol 5.0 parts by mass-Surfactant (Product name: MegaFac (registered trademark) F444, manufactured by DIC Corporation)
3.0 mass parts ・ Ion-exchanged water 41.5 mass parts

Subsequently, the ink for image formation was ejected from the ink jet device to the image forming surface of the transfer body to form an intermediate image on the transfer body. As the ink jet device, a device of a type that ejects ink by an on-demand method using an electric-heat converter is used. As the ink, a resin-dispersed pigment ink having the following composition was used.
・ C. I. Pigment Blue 15 3.0 parts by mass-Styrene-acrylic acid-ethyl acrylate copolymer (acid value 240, weight average molecular weight 5000) 1.0 part by mass-Glycerol 10.0 parts by mass-Ethylene glycol 5.0 parts by mass・ Surfactant (trade name: acetylenol (registered trademark) E100, manufactured by Kawaken Fine Chemicals Co., Ltd.)
0.5 parts by mass ・ Ion-exchanged water 80.5 parts by mass

Using a high-quality paper (trade name: OK Prince Quality, Oji Paper Co., Ltd., basis weight: 81.4 g / m ² ) as a recording medium, an intermediate image was transferred to the recording medium to form a final image. This transfer was performed 30000 times at a printing speed of 0.30 m / sec. Durability, intermediate image quality, and transferability were evaluated based on the following criteria from the state of the transferred body, the intermediate image, and the final image after recording 30000 times. The evaluation results are shown in Table 3. In this evaluation, if the evaluation of durability, intermediate image quality, and transferability were all B or more, it was determined that a transfer type inkjet recording transfer body having high durability and transferability was obtained.

(Durability evaluation)
The surface of the transfer body was observed with an optical microscope and evaluated according to the following criteria.
A: No crack was confirmed on the surface of the transfer body.
B: A slight crack was confirmed on the surface of the transfer body.
C: Cracks were confirmed on the surface of the transfer body.
D: Many cracks were confirmed on the surface of the transfer body.
(Evaluation of intermediate image quality)
The coating property of the reaction liquid on the surface of the transfer body closely related to the intermediate image quality and the intermediate image were observed with an optical microscope and evaluated according to the following criteria.
A: The reaction solution was uniformly applied without repelling, and the intermediate image was well formed.
B: Although slight repelling of the reaction solution was confirmed, it was sufficient as an intermediate image.
C: The reaction liquid was confirmed to be repelled, and a part of the intermediate image was not satisfactory.
D: Remarkable repelling of the reaction solution was confirmed, and the intermediate image was not of sufficient quality overall (evaluation of transferability)
The image quality of the ink image on the transfer body after transfer and the final image formed on the recording medium was observed with an optical microscope and evaluated according to the following criteria.
A: The remainder of the ink image is not confirmed on the transfer body, and the final image is also formed favorably.
B: Although the remainder of the ink image was slightly confirmed on the transfer body, the quality of the final image was sufficient.
C: The remaining of the ink image was slightly confirmed on the transfer body, and a part of the final image was not sufficiently transferred.
D: The remainder of the ink image was confirmed on the transfer member, and the final image was not fully transferred.

[Examples 28 to 52] (Production and evaluation of transfer bodies T02 to T26)
Transfer bodies T02 to T26 were produced in the same manner as in Example 27 except that the sol compositions S02 to S26 were used instead of the sol composition S01 in Example 27. Evaluation similar to 27 was performed. The results are shown in Table 3.

[Comparative Examples 9 to 16] (Production and evaluation of transfer bodies U01 to U08)
Transfer bodies U01 to U08 were prepared in the same manner as in Example 27 except that the sol compositions H01 to H08 were used in place of the sol composition S01 in Example 27. Evaluation similar to 27 was performed. The results are shown in Table 3.
In the evaluation using the transfer body using the sol composition of the present invention in Examples 27 to 52, the evaluation was B or more in any evaluation, and it was excellent as a sol composition for a transfer body.
In particular, when Examples 27 to 33 are compared, it is found that the sol compositions S02 to S04 having a ratio of (A) the cyclic ether group-containing silane compound of 30 mol% to 50 mol% are preferable as the sol composition for the transfer body. It was.
Further, Example 29 and Examples 18 to 21 (acid concentrations: 0, 250, 1000, 1500 ppm in order) using the sol composition S03 (acid concentration: 500 ppm) of Example 3 were respectively used. When Examples 44 to 47 used were compared, it was found that sol compositions S03, S19 and S20 reacted at an acid concentration of 250 ppm to 1000 ppm were more preferable in the same composition.
Furthermore, in Examples 48 to 52, it was found that sol compositions S22 to S26 using (D) a fluorinated alkyl group-containing silane compound as the fourth component were more preferable as the sol composition for transfer members.

1 Transfer body 2 Surface layer part

Claims (13)

(A) The following general formula [1]

[Wherein, X represents an organic group containing a cyclic ether group having 2 or 3 carbon atoms constituting the ring. R ¹ and R ² each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. n represents 0 or 1. ]
A cyclic ether group-containing silane compound represented by:
(B) The following general formula [2]

[In the formula, Z represents a linear or branched alkyl group having 1 to 6 carbon atoms. R ³ and R ⁴ each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. m represents 0 or 1; ]
An alkyl group-containing silane compound represented by:
(C) The following general formula [3]

[Wherein Y ¹ represents a linear or branched fluorinated alkyl group having 9 to 25 fluorine atoms and 4 to 14 carbon atoms. R ⁵ and R ⁶ each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. p represents 0 or 1; ]
A long-chain fluorinated alkyl group-containing silane compound represented by:
A sol composition for a transfer body of a transfer type ink jet recording containing a hydrolysis condensate of
A sol composition having a condensation rate of the hydrolysis-condensation product of 45% to 70%.   The hydrolysis condensate contains 30 mol% or more and 70 mol% or less of units derived from the cyclic ether group-containing silane compound represented by the formula [1], based on the total number of moles of units derived from all silane compounds. The sol composition according to claim 1.   The hydrolyzed condensate contains 0.1 mol% or more and 5 mol% of units derived from the long-chain fluorinated alkyl group-containing silane compound represented by the formula [3], based on the total number of moles of units derived from all silane compounds. The sol composition according to claim 1 or 2, comprising:   The sol composition according to any one of claims 1 to 3, wherein n and m are both 1. The hydrolysis condensate is
(A) a cyclic ether group-containing silane compound represented by the formula [1],
(B) an alkyl group-containing silane compound represented by the formula [2],
(C) a long-chain fluorinated alkyl group-containing silane compound represented by the formula [3],
(D) The following general formula [4]

[Wherein Y ² represents a linear or branched fluorinated alkyl group having 3 to 8 fluorine atoms and 1 to 6 carbon atoms. R ⁷ and R ⁸ each represent a linear or branched alkyl group having 1 to 6 carbon atoms. q represents 0 or 1; ]
A fluorinated alkyl group-containing silane compound represented by:
The sol composition according to any one of claims 1 to 4, wherein the sol composition is a hydrolytic condensate.   The hydrolysis-condensation product contains 1 mol% or more and 50 mol% or less of a unit derived from a fluorinated alkyl group-containing silane compound represented by the formula [4] based on the total number of moles of units derived from all silane compounds. The sol composition according to claim 5, characterized in that (A) The following general formula [1]

[Wherein X is an organic group containing a cyclic ether group having 2 or 3 carbon atoms constituting the ring, and R ¹ and R ² are each independently a straight chain or branched chain having 1 to 6 carbon atoms. Represents an alkyl group. n represents 0 or 1. ]
A cyclic ether group-containing silane compound represented by:
(B) The following general formula [2]

[In the formula, Z represents a linear or branched alkyl group having 1 to 6 carbon atoms. R ³ and R ⁴ each independently represents a linear or branched alkyl group having 1 to 6 carbon atoms. m represents 0 or 1; ]
An alkyl group-containing silane compound represented by:
(C) The following general formula [3]

[Wherein Y ¹ represents a linear or branched fluorinated alkyl group having 9 to 25 fluorine atoms and 4 to 14 carbon atoms. R ⁵ and R ⁶ each represent a linear or branched alkyl group having 1 to 6 carbon atoms. p represents 0 or 1; ]
A long-chain fluorinated alkyl group-containing silane compound represented by:
An organic acid,
Mixing to obtain a mixture;
Hydrolyzing and condensing the mixture to obtain a sol composition containing the hydrolytic condensate;
A process for producing a sol composition, comprising:   The method for producing a sol composition according to claim 7, wherein the content of the organic acid in the mixture is 250 ppm or more and 1000 ppm or less based on the total mass of the mixture.   The ratio of the cyclic ether group-containing silane compound represented by the formula [1] in the mixture is 30 mol% or more and 70 mol% or less based on the total number of moles of all silane compounds. A method for producing a sol composition according to 7 or 8.   The ratio of the long-chain fluorinated alkyl group-containing silane compound represented by the formula [3] in the mixture is 0.1 mol% or more and 5 mol% or less based on the total number of moles of all silane compounds. A method for producing a sol composition according to any one of claims 7 to 9. A transfer body for transfer type inkjet recording having at least a surface layer part,
A transfer body comprising a cured product of the sol composition according to any one of claims 1 to 6 in the surface layer portion.   A transfer type ink jet recording apparatus comprising the transfer body according to claim 11. Forming an ink image on the transfer body by applying ink using an inkjet device; and
Transferring the ink image from the transfer body to a recording medium;
A transfer-type inkjet recording method comprising:
A transfer type ink jet recording method, wherein the transfer body is the transfer body according to claim 11.

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