JPS63134239A - Receiving body for heat-sensitive transfer recording using volatile pigment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image receptor for thermal transfer recording using sublimable dyes.

[Industrial application field]

The image receptor for thermal transfer recording using the sublimable dye of the present invention is:
Facsimiles (facsimiles), printers,
It can be advantageously used for color recording in OA terminals such as copying machines, color recording of television images, etc.

[Conventional technology]

Various methods are being considered for color recording in the aforementioned OA terminals and color recording of television images, such as electrophotography, inkjet, and thermal transfer recording.
The thermal transfer recording method is advantageous over other methods in terms of maintainability of the device, ease of operation, and low cost of the device and consumables.

In the thermal transfer recording method described above, an image receptor is superimposed on the ink-coated surface of a color sheet, in which ink containing pigments, binders, etc. is coated on a sheet-like base material, and the back surface of the color sheet is printed with a thermal head. Recording is performed by heating the color sheet to transfer the dye in the color sheet to the image receptor.

Such thermal transfer recording methods include a melt transfer recording method that uses a color sheet coated with heat-melting ink, and a sublimation transfer recording method that uses a color sheet coated with an ink containing a sublimable dye. This method allows easy control of the amount of dye sublimation transfer by adjusting the energy applied to the thermal head, making it easy to express gradation, and is particularly advantageous for color recording.

In the sublimation transfer recording method, since it is necessary to dye the image receptor with the dye sublimated from the color sheet, the surface of the image receptor is mainly made of thermoplastic resin that has a high affinity with the dye used. However, since the temperature of the thermal head is generally 200°C or higher, the ink binder of one color sheet and the thermoplastic resin of the image receiving layer are This causes a problem in that the color sheet and the image receptor are fused together, making it difficult to separate them after recording.

In addition, the obtained records are required to have long-term stability, such that the color tone of the records does not fade or discolor over a long period of time, and the recorded images do not become blurred.

Conventionally, as a method for preventing such fusion between the color sheet and the image receptor, there is a method of improving heat resistance using an image-receiving N/IiK crosslinking resin (JP-A-Sho!?-2/!J-RI No. 2). (Japanese Patent Application Laid-Open No. 107-107rrj), or a method of roughening the surface of the image-receiving layer by adding a pigment to the resin of the image-receiving layer (Japanese Patent Application Laid-Open No. 107-107-1982). was suggested.

However, the former method has the disadvantage that the resin of the image-receiving layer is cured by crosslinking, resulting in poor dyeing during transfer and low color density. In addition, in the latter method, due to the roughening of the surface, the adhesion between the color sheet and the image receptor during transfer is insufficient, which tends to cause a decrease in color density and color unevenness. However, it had the disadvantage of contaminating other papers etc. afterwards.

Furthermore, as an attempt to prevent the fusion between the color sheet and the image receptor, there is a method of applying silicone grease on the image receiving layer (Japanese Unexamined Patent Publication No. Sho! Turf 1! 11#), a method of coating an isocyanate compound and A method of applying a modified silicone oil having a functional group that reacts with an incyanate compound (Japanese Unexamined Patent Publication No. 67-722297), or a method of containing a reaction cured product of an amino-modified silicone and an epoxy-modified silicone in the image-receiving layer ( Japanese Patent Publication Showa 4O-III
-791) was proposed. However, the method using these silicone compounds has the disadvantage that the transferred dye dissolves into the grease and the image oozes, and the latter method does not completely react with the in7anate group or epoxy group. If incyanate groups or epoxy groups remain, the remaining incyanate groups or epoxy groups are transferred by sublimation and react with the dye, resulting in discoloration of the dye, which may reduce the preservation and stability of records. There's a problem.

[Problem that the invention seeks to solve]

The present invention aims to provide an image receptor for thermal transfer recording using a sublimable dye, which exhibits good peeling from a color sheet after transfer recording and provides recording with excellent stability.

[Ninth way to solve the problem]

As a result of various studies to solve the above-mentioned problems, the present inventors discovered that amino-modified silicone and carboxylic acid, sulfonic acid, etc. or a layer containing a silicone compound obtained by reacting amino-modified silicone with carboxylic acid, sulfonic acid, or a derivative thereof is provided on the image-receiving layer. By doing so, they discovered that the object can be easily achieved and arrived at the present invention.

That is, the image receptor for thermal transfer recording using the sublimable dye of the present invention has an image receptor layer mainly composed of a thermoplastic resin on the surface of the substrate, and the surface of the image receptor layer is coated with amino-modified silicone and carbon dioxide. This image receptor is characterized by having a layer containing a silicone compound obtained by reaction with an acid, sulfonic acid, or a derivative thereof.

In the present invention, various means are possible for forming the surface of the image-receiving layer into a layer containing a silicone compound obtained by reacting an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof. Usually, the image-receiving layer itself contains a silicone compound obtained by reacting amino-modified silicone with carboxylic acid, sulfonic acid, or a derivative thereof, or the image-receiving layer is further coated with a silicone compound obtained by reacting amino-modified silicone with carboxylic acid, sulfonic acid, or a derivative thereof. It is convenient and preferable to provide a layer containing a silicone compound obtained by reaction with a derivative of.

Examples of the substrate for the image receptor of the present invention include various FC papers made of cellulose fibers, various synthetic papers made of synthetic resins, and plastic films.

As the thermoplastic resin for forming the image-receiving layer in the image receptor of the present invention, since disperse dyes are generally used as sublimable dyes, a resin having excellent affinity with such dyes (pigments) is desirable. Examples of such thermoplastic resins include polyester resins obtained by condensation of dicarboxylic acid components such as terephthalic acid, isophthalic acid, and succinic acid, and glycol components such as ethylene glycol, diethylene glycol, propylene glycol, and neopentyl glycol; Acrylic resins such as methyl methacrylate, polybutyl methacrylate, polymethyl acrylate, and polybutyl acrylate, polystyrene, As resin, polycarbonate, polysulfone, polyvinylpyrrolidone,
Ethyl cellulose, acetyl cellulose, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, etc. include saturated linear polyester resin, vinyl chloride resin, and acrylic. This type of resin is particularly preferred because it has excellent affinity with disperse dyes. Moreover, these resins can be used alone or in mixtures.

The silicone compound obtained by the reaction of the amino-modified silicone used in the present invention with a carboxylic acid, a sulfonic acid, or a derivative thereof is, for example, an amino-modified silicone represented by the following formulas (A) and (1) (each formula During,
(R represents c'Fi, - or 0H30-) (A) (B) can be obtained by reaction with various carboxylic acid or sulfonic acid derivatives. Examples of the above amino-modified silicones include Shin-Etsu Silicone KF-j, KF-r! from Shin-Etsu Chemical Co., Ltd. 7 KF-13-r
KIF-1j9 KF-140KF-jrt/,
KF-/Buko, KF-/4hiro, KF-rts, X-22
-3410,X-22-JrOD,X-22-! 70
IO,KF-? It is commercially available under trade names such as 47.

Among these, KF-393K'F- with the smaller amino equivalent
rs7 KIP-762KF-/47 etc. show particularly excellent performance.

In addition, the amino equivalent is expressed as the value obtained by dividing the molecular weight of the silicone by the number of amino groups contained in the amino-modified silicone molecule, and the smaller the amino equivalent, the higher the content of amino groups. The amino equivalent weight of the product is shown in the table below.

Carboxylic acid reacted with the above amino-modified silicone,
Examples of sulfonic acids and their derivatives include the acids themselves, acid halides, acid anhydrides, and esters. Specific examples thereof include formic acid, acetic acid, propionic acid, β-chloropropionic acid, etc.
acids, aliphatic saturated carboxylic acids such as trifluoroacetic acid, butyric acid, valeric acid, caproic acid, lauric acid, palmitic acid, stearic acid, behenic acid, succinic acid, adipic acid, etc., acrylic acid, methacrylic acid, alpha-chloro Aliphatic unsaturated carboxylic acids such as acrylic acid, oleic acid, linoleic acid, maleic acid, fumaric acid, benzoic acid, p
- Aromatic carboxylic acids such as chlorobenzoic acid, p-methylbenzoic acid, phthalic acid, naphthalic acid, pyromellitic acid, and trimellitic acid, and their acid chlorides, acid bromides, and ester acid anhydrides. Chloroformic acid and its methyl, ethyl, propyl, butyl, hexyl, octyl, and benzyl esters;
Examples include sulfonic acids such as benzenesulfone (ELp-) luenesulfonic acid, and acid chlorides, acid bromides, and esters thereof.

In the present invention, the image-receiving layer itself contains a silicone-based compound obtained by the reaction of amino-modified silicone with the above-mentioned carboxylic acid, sulfonic acid, or their derivatives. Adding a silicone compound obtained by reacting an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof to a stock solution for an image-receiving layer dissolved or dispersed in an appropriate solvent;
The coating solution may be prepared by mixing and applying the coating solution onto a substrate using a Kfi cloth and drying. Further, 1-amino-modified silicone and carboxylic acid, sulfonic acid or their derivatives are added to the stock solution for the image-receiving layer described above, and a coating solution prepared by mixing the mixture is applied onto the substrate,
By drying, the amino-modified silicone may be reacted with carboxylic acid, sulfonic acid, or a derivative thereof during formation of the image-receiving layer. In these image-receiving layer forming methods, by heat-treating under appropriate conditions after drying, the releasability from the color sheet after transfer can be improved. Appropriate heat treatment conditions are 50 to 720°C for about 70 to 60 minutes.

In a method in which a silicone compound obtained by reacting amino-modified silicone with carboxylic acid, sulfonic acid, or their derivatives is added to the stock solution for the image-receiving layer, the amount of the silicone compound is /~ 20 weight-i
% is preferred.

In addition, in the method of adding amino-modified silicone and carboxylic acid, sulfonic acid, or their derivatives to the stock solution for the image-receiving layer, the amount of carboxylic acid, sulfonic acid, or their derivatives used is the amino-modified + 1'lJ cone. A suitable amount of O, S~/, 5 molar equivalents based on the amino group is preferred, and the amount of the amino-modified silicone is preferably 7 to 20% by weight based on the thermoplastic resin.

Water and various organic solvents can be used as the solvent. In addition, organic solvents include aromatic solvents such as toluene and xylene, ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, ester solvents such as ethyl acetate and butyl acetate,
Alcohol solvents such as methanol, ethanol, impropatol, butanol, and methyl cellosolve; halogenated hydrocarbon solvents such as methylene chloride, trichloroethylene, and chlorobenzene; ether solvents such as dioxane and tetrahydro 7'77;dimethylformamide; An amide solvent such as N-methylpyrrolidone is used.

Further, in addition to the above-mentioned components, the coating liquid may contain an ultraviolet absorber, an antioxidant, a light stabilizer, a fluorescent whitening agent, etc., if necessary.

As for the application method, for example, a method using a reverse roll coater, gravure coater, rod coater, air doctor coater, etc. (For details, refer to "Coating Method" written by Yuji Harasaki, published by Maki Shoten, 7977), etc. is used.

There is healing.

An image receptor according to another embodiment of the present invention, in which a layer containing a silicone compound obtained by reacting an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof is formed on the image-receiving layer. is obtained by the same method as the method for forming the image-receiving layer described above, except that a coating solution containing no silicone compound obtained by the reaction of amino-modified silicone with carboxylic acid, sulfonic acid, or their derivatives is used. An image-receiving layer is formed on the substrate, and a layer containing a silicone compound obtained by the reaction of an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof may be further formed thereon.

As a method for forming a layer containing a silicone compound obtained by reacting the amino-modified silicone with carboxylic acid, sulfonic acid, or a derivative thereof, The silicone compound obtained by the reaction with the above-mentioned amino-modified It may be applied onto an image-receiving layer that does not contain a silicone compound obtained by reacting silicone with carboxylic acid, sulfonic acid, or a derivative thereof, and then dried. In addition, amino-modified silicone and carboxylic acid,
Diluting sulfonic acids or their derivatives with a suitable solvent,
Depending on the case, a solution prepared by mixing the sublimable dye with a resin having good permeability may be applied onto the above-mentioned image receiving surface not containing the silicone compound and dried. The amount of carboxylic acid, sulfonic acid, or their derivatives used in this case is 0 to 0,000 for the amino groups in the amino-modified silicone. ~/, 5
That view is appropriate. The coating film thickness is 00007 to 5 μm as a dry film thickness, preferably 0.07 to 5 μm.

Note that there are various sublimable dyes that can be used in color sheets for thermal transfer recording using the image receptor of the present invention. For example, various sublimable dyes such as azo, anthraquinone, nitro, styryl, naphthoquinone, quinophthalone, azomethine, coumarin, and fused polycyclic dyes are used.

〔Effect of the invention〕

The image receptor of the present invention exhibits good peeling from a color sheet after transfer recording, provides records with good gradation and resolution, and has good storage stability of records.

〔Example〕

The following is a more detailed explanation of Examples and Comparative Examples.
These examples are not intended to limit the invention. In all of these examples, "parts" mean "parts by weight."

Examples/a) Production of image receptor Saturated polyester resin TP-, 220 (trade name manufactured by Nippon Gosei Kagaku Co., Ltd.) 70 parts, methyl ethyl ketone 15 parts,
15 parts of xylene, and 0.0% of a silicone compound obtained by reacting amime-modified silicone with palmitic acid chloride by the method described in d) below. ! The coating liquid for the image-receiving layer obtained by mixing and dissolving the two parts was coated on synthetic paper (P-4) WP.
-/10 (trade name manufactured by Nisshinbo Co., Ltd.) was coated with a wire bar AJ (wet film thickness 2≠μm) and then dried with hot air using a dryer to form a dry coating film (image receiving layer) with a thickness of about 7μm. Ta. Furthermore, an image receptor was manufactured by heating in an oven at 700° C. for 3Q minutes.

b) Manufacture of color sheet A color sheet is manufactured by the method described below using a biaxially stretched polyethylene terephthalate film (thickness 6 μm) whose back side of the ink-applied surface is heat-resistant treated with polyimide resin as the base film. did.

In other words, anthraquinone-based sublimable dye λ having the chemical structural formula λ? , cellulose acetate (product name L-JO, manufactured by Daicel Chemical Industries, Ltd.)
10f, a mixture of methyl ethyl ketone 1009 was treated with a paint conditioner using glass beads for about 30 minutes, and the ink was applied to the above polyethylene terephthalate using a wire bar. C) Transfer Recording The inked surface of the above color sheet was Using a thermal head that overlaps the image-receiving layer surface of the image receptor described above and has a heat-generating resistor density of hirodot/wR, a power of 0.1-W/dot is applied for various times as listed in Table 1 below. was applied and recorded. As a result, no fusion occurred between the sheet and the image receptor during recording. Furthermore, the sheet and image receptor could be easily separated after recording.

Furthermore, the obtained recording had good resolution of each dot, and showed a clear magenta color, and the color density increased as the application time increased, as shown in Table 1 below. The color density was measured using a densitometer RD-! made by Macbeth, USA.
/44 type (filter m: Utsuten&!I) (the same applies to Example 2 and subsequent examples).

In addition, the recorded image receptor is heated at 40℃ and relative humidity is ♂0.
% for 3 days, and the stability of the recording was tested, and it was found that there was no bleeding on the recording, and no discoloration or fading occurred.

d) Preparation of silicone compound Amino modified silicone KF-39! (amino hit ij4<
7; Shin-Etsu Chemical Co., Ltd. (product name) 7.22 and triethylamino λ? into methyl ethyl ketone 2Of, 2t of palmitic acid chloride was added dropwise thereto, and after reacting at about 50°C for 7 hours, the reaction solution was diluted with water/00
, discharged into l. The obtained liquid K! O-ethyl acetate was added to separate the aqueous layer and the constricted layer, and the organic layer was collected.

Next is the organic layer! After washing with 700 nt1 of caustic soda solution and 100 nt1 of water, it was dried over anhydrous sodium sulfate. After removing the anhydrous sodium sulfate by filtration, ethyl acetate was evaporated from the resulting solution to obtain the desired product.

FIG. 1 shows the infrared absorption spectrum of the raw material amino-modified silicone KF-323, and FIG. 2 shows the infrared absorption spectrum of the target product.

Example λ a) Production of receiver A receiver was produced in the same manner as in Example, except that the silicone compound prepared by the method d) below was used.

b) Manufacture of color sheets It was carried out in the same manner as in Example.

C) Transfer recording was carried out in the same manner as in Example 1, and the image receptor and the sheet were not fused during recording, and the image receptor and color sheet could be easily separated after recording.

In addition, each of the obtained recordings had good resolution of each dot and exhibited a clear magenta color, and the color density thereof increased as shown in Table 1 below, as the pulse application time increased.

Furthermore, each record is ℃, relative humidity? When tested after being left at θ% for 3 days, there was no color bleeding, discoloration or fading, and it showed good stability.

d) Preparation of silicone compound In place of palmitic acid chloride used in Example 3, chloroformic acid (n) butyl ester was used. three? The desired silicone compound was prepared in the same manner as in Example except that . The infrared absorption spectrum of the obtained silicone compound is shown in FIG.

Example 3 a) Production of image receptor An image receptor was produced in the same manner as in Example 1, except that the silicone compound prepared by the method d) below was used.

11+) Manufacturing of color sheets It was carried out in the same manner as in Example.

C) Transfer Recording When transfer recording was carried out in the same manner as in Example/, there was no fusion between the image receptor and the sheet during recording, and the image receptor and color sheet could be easily separated after recording.

In addition, each of the obtained records had good resolution of each dot and exhibited a clear magenta color, and the color density increased with the application time as shown in Table 7 below.

Furthermore, each record is 0℃, relative humidity? When tested after being left at θ% for 3 days, there was no color bleeding, discoloration or fading, and good stability was exhibited.

d) Preparation of silicone compound In place of palmitic acid chloride used in Example 2, acetic anhydride was used. ! The desired silicone compound was prepared in the same manner as in Example except that Ftll!t was used. did. The infrared absorption spectrum of the obtained silicone compound is shown in Figure 1.

Examples≠ a) Production of image receptor A coating liquid for an image receiving layer obtained by mixing and dissolving saturated polyester resin TP-2λo io parts, 775 parts of methyl ethyl keto, and 75 parts of xylene was applied to synthetic paper Yubo FPG-
/! 0 (trade name manufactured by Oji Yuka Co., Ltd.) with a wire bar to a wet film thickness of -2≠μm, and then dried with hot air using a dryer to form a dry coating film (image-receiving layer) with a thickness of about 2 μm. On the injured layer, a silicone compound prepared by the method described in Example/a) K! A coating solution containing 725 parts of methyl ethyl ketone and 725 parts of methyl ethyl ketone was coated with a wire parser to a wet film thickness of 6 μm, and then dried with hot air using a dryer to form an overcoat layer, thereby producing an image receptor.

b) Manufacture of color sheets It was carried out in the same manner as in Example.

C) Transfer recording: The image receptor and color sheet could be easily separated after recording.

In addition, each of the obtained records had good resolution of each dot and exhibited a clear magenta color, and the color density increased with the application time as shown in Table 1 below.

When tested by leaving each record at 60° C. and relative humidity/Q% for 3 days, it showed good stability with no color bleeding, discoloration or fading.

Example! a) Manufacture of image receptor An image receptor was manufactured in the same manner as in Example 1, except that 10 parts of the saturated polyester resin TP-22, 775 parts of methyl ethyl keto, 2775 parts of xylene, and a coating solution for the image receiving layer were used.

b) Manufacture of color sheets It was carried out in the same manner as in Example.

C) Transfer recording Example When transfer recording was carried out in the same manner as in Example 1, there was no fusion between the image receptor and the sheet during recording, and the image receptor and color sheet could be easily separated after recording.

In addition, each of the obtained records had good resolution of each dot and exhibited a clear magenta color, and the color density thereof increased as the pulse application time was increased as shown in Table 1 below.

Further, each of the records was tested by being left for 3 days at a temperature of 10° C. and a relative humidity of 10° C., and showed good stability without color bleeding, discoloration, or fading.

Example 6 a) Production of image receptor 10 parts of saturated polyester resin TP-22, 775 parts of methyl ethyl keto, xylene/! Part, amino-modified silicone KF-J Rij 004A part, p-) Same as Example/, except that a coating liquid for an image-receiving layer obtained by mixing and dissolving 0.3 parts of methyl luenesulfonate was used. An image receptor was manufactured by the method described in the following.

b) Manufacture of color sheets It was carried out in the same manner as in Example.

C) Transfer Recording When transfer recording was carried out in the same manner as in Example/, there was no fusion between the image receptor and the sheet during recording, and the image receptor and color sheet could be easily separated after recording.

(9) Each of the obtained records had good resolution of each dot and exhibited a clear magenta color, and the color density increased as the pulse application time increased as shown in Table 1 below.

Further, each of the records was tested by being left at 60° C. and a relative humidity of ♂O% for 3 days, and showed good stability with no color bleeding, discoloration or fading.

Example 7 a) Production of image receptor Same method as in Example except that vinyl chloride-vinyl acetate copolymer resin UOAR-VYHI (trade name manufactured by Union Carbide) was used instead of the saturated polyester resin. A good image receptor was manufactured.

b) Manufacture of color sheets It was carried out in the same manner as in Example.

C) Transfer recording was carried out in the same manner as in Example 9. The image receptor and the sheet were not fused during recording, and the image receptor and color sheet could be easily separated after recording.9.

In addition, each of the nine records obtained had good resolution of each dot.
, a clear maze/red color was exhibited, and the color density increased as the oshi application time was shown in Table 1 below.

Further, each of the records was tested by being left at 40° C. and 70% relative humidity for 3 days, and showed good stability with no color blurring, discoloration, or fading.

First surface Examples ♂ to 10 As a sublimable dye, a second
Color sheets were produced in the same manner as in Example except that each of the pigments shown in the table was used. Transfer recording was carried out using this color sheet and the same image receptor as in Example 1, except for the same procedure as in Example.

The results shown in Table 2 show that the color sheet and image receptor could be easily separated after recording, and the resulting recording had good gradation and resolution.

Also, the records obtained at 0℃ and relative humidity? When left for 3 days at zero temperature, there were no signs of color bleeding, discoloration, fading, etc. (all showed good recording stability).

Comparative Example: An image receptor and a color sheet were produced in the same manner as in Example, except that the coating liquid for the image-receiving layer did not contain a silicone compound.

Using the obtained image receptor and color sheet, transfer recording was performed in the same manner as in Example.

The result was that the color sheet and image receptor were fused together, making it difficult to separate.

Comparative Examples λ and 3 Image receptors were manufactured in the same manner as in Examples except that the silicone listed in Table 3 was used as the coating liquid for the image-receiving layer, and recording was performed in the same manner. At times, the image receptor and the color sheet did not fuse together, and the image receptor and the color sheet could be easily separated after recording. The resulting record had good gradation and resolution, and showed a clear magenta color. However, when this record was stored for 3 days in air at 60° C. and relative humidity ♂θ, the dye oozed out and the recorded image became blurred.

Table 3

[Brief explanation of the drawings] Figure 1 shows the infrared absorption spectrum of the raw material amino-modified silicone KF'-3, and Figures 2, 3, and φ respectively show the infrared absorption spectrum of the amino-modified silicone KF-J. 3 shows an infrared absorption spectrum of a silicone compound which is a reaction product of Ri 3 and palmitic acid chloride, chloroformic acid (n) butyl ester, or acetic anhydride. Applicant: Mitsubishi Chemical Industries, Ltd. Agent: Patent attorney For long baths - (and 7 others)

Claims (3)

[Claims] (1) In an image receptor having an image-receiving layer mainly composed of a thermoplastic resin on the surface of a substrate, the surface of the image-receiving layer is made of a silicone-based material obtained by reacting an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof. An image receptor for thermal transfer recording using a sublimable dye, characterized by having a layer containing a compound. (2) The image receptor according to claim 1, wherein the image receptor layer itself contains a silicone compound obtained by reacting an amino-modified silicone with a carboxylic acid, a sulfonic acid, or a derivative thereof. (3) Amino-modified silicone and carboxylic acid on the image-receiving layer,
An image receptor according to claim 1, further comprising a layer containing a silicone compound obtained by reaction with sulfonic acid or a derivative thereof.