JPH07314920A - Image receiving medium for sublimation-type heat transfer - Google Patents

Abstract

PURPOSE:To provide a resin for a receiving layer with improved crosslinking density, excellent heat resistance and excellent strength during heating and to provide a good transferred image. CONSTITUTION:An image receiving medium for heat transfer used for a method for sublimation-type heat transfer recording wherein an image receiving medium and a recording medium are laminated in such a way that the transfer layer of the recording medium and the receiving layer of the image receiving medium are faced each other and under the condition of (the speed of the image receiving medium)/(the speed of the recording medium)>1 or (the amt. of transfer of the image receiving medium)/the amt. of transfer of the recording medium)>1, printing under heating is performed from the recording medium side, is provided. In addition, the image receiving medium for sublimation-type heat transfer wherein a dyeable resin with OH groups of at least 20 on average per one molecule and a curing agent with isocyanate groups are incorporated in a receiving layer and a catalyst for accelerating the reaction of these groups are incorporated, is provided.

Description

Detailed Description of the Invention

[0001]

2. Description of the Related Art Generally, a sublimation type thermal transfer recording method uses one recording medium (ink sheet) of yellow, magenta, cyan, and (black) for obtaining one full-color image, and then uses an unused portion. However, it has the disadvantage of high running cost because it is discarded even if it exists.
Therefore, in order to improve this drawback, in recent years, a method of printing and recording many times by repeatedly using the same ink sheet has been performed. Specifically, a constant velocity mode method in which an ink sheet and an image receiving medium (image receiving sheet) are repeatedly printed in a state of running at high speed, and the speed of the image receiving sheet is set to n times (n> 1) the speed of the ink sheet. Two methods are an n-fold mode method in which both sheets are repeatedly printed while running.
The latter n-fold mode method prints a large number of times by a relative speed method in which the overlap between the used portion of the ink layer before the ink layer and the used portion of the ink layer after the ink layer is gradually shifted. In the multiple recording method using the n-fold mode method, since a part of the unused portion of the ink layer is always supplied every time printing is performed, the multiple recording method using the constant velocity mode method is merely a repeated use of the used portion. Compared with the recording method, there is an advantage that the variation in the remaining ink amount due to the recording history can be reduced. The sublimation-type thermal transfer method based on the n-fold mode method includes a recording medium for sublimation-type thermal transfer having a transfer layer containing a thermal sublimation dye, and an image receiving medium having an image receiving layer provided on a substrate, and a transfer layer of the recording medium. The image receiving medium and the image receiving layer are superposed so as to face each other, and under the conditions of image receiving medium speed / recording medium speed> 1, or image receiving medium feed amount / recording medium feed amount> 1 (that is, image receiving medium velocity Is faster than the speed of the recording medium), and heating printing is performed from the substrate side of the recording medium.

However, in this recording method,
Compared with the conventional method, mechanical distortion is likely to occur on the contact surface between the transfer body and the image receiving medium during heating, so the transfer medium or the image receiving medium is more likely to be destroyed, and transport failure (sticking) is more likely to occur, resulting in a satisfactory recorded image. May not be able to get. Therefore, the transfer medium and the image receiving medium are required to have higher heat resistance than conventional ones. Therefore, a cured resin is preferably used as the receiving layer resin, and a curing reaction product of an isocyanate and a resin having an OH group is preferably used (JP-A-4-153084, JP-A-5-104865). However, even in such an image receiving medium, since the curing reaction of the image receiving layer resin is insufficient, the crosslinking density of the image receiving layer resin is small, and the heat resistance and the strength at the time of heating are still insufficient, so that a good image cannot be obtained. There is.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image receiving medium for sublimation type thermal transfer which has an improved crosslink density of a receptor layer resin, is excellent in heat resistance and strength upon heating and gives a good transferred image. And

[0004]

According to the present invention, the image receiving medium and the recording medium are superposed so that the transfer layer of the recording medium and the receiving layer of the image receiving medium face each other, and the speed of the image receiving medium / the recording medium. A thermal transfer image receiving medium used in a sublimation type thermal transfer recording method in which heat printing is performed from the recording medium side under the following conditions: speed> 1, or image carrier feed amount / recording medium feed amount> 1.
Sublimation type thermal transfer characterized in that the receptor layer contains a dyeing resin having an average of 20 or more OH groups per molecule and a curing agent having an isocyanate group, and a catalyst for promoting the reaction of these groups. An image receiving medium is provided.

Next, the present invention will be described with reference to the drawings. Figure 1
Shows the basic structure of the image receiving medium of the present invention. The image receiving medium 1 is a substrate 2 on which a receiving layer 3 is provided. That is, the receiving layer 3 is provided on the base 2. The receiving layer 3 contains a reaction product of a dyeing resin that easily dyes a sublimation dye on a substrate and a compound having an isocyanate group, which is a curing agent, as main components.

In the image-receiving medium of the present invention, the dyeing resin constituting the receiving layer is a resin showing dyeability to sublimable dyes, and if it has an average of 20 or more OH groups per molecule. There is no particular limitation, and examples thereof include polyester resins, vinyl chloride resins, acrylic resins, polyurethane resins, vinyl acetate resins and nylon resins. The resin preferably used in the present invention is a vinyl chloride resin. Commercially available products include, for example, VAGH of Union Carbide, etc., and electrified vinyl 1000 GKT, 1000 GK of Electrochemical Industry, 1
000GSK, 1000LCH, etc. are mentioned. When the number of OH groups in the dyeable resin is not more than 20 on average per molecule, the resin layer is insufficiently cured and does not have sufficient heat resistance. No recorded image can be obtained.

The curing agent used in the present invention is a compound having an isocyanate group, which cross-links the dyeing resin to improve the heat resistance of the receiving layer resin and the releasability from the recording medium. Examples of such isocyanate compounds include tolylene diisocyanate, hexamethylene diisocyanate, 4,4-diphenylmethane diisocyanate, triphenylmethane triisocyanate, adducts of tolylene diisocyanate with trimethylolpropane, and tolylene diisocyanate trimer. Although various isocyanates are used, the use of aromatic isocyanates is preferable because the reaction rate is high and the curing reaction of the receiving layer is facilitated.

The molar ratio of the reactive group of the compound having an isocyanate group to the dyeing resin having an OH group is NCO / OH =
It is preferably 0.2 to 2, and when the NCO group is small, the heat resistance is insufficient. On the contrary, when the NCO group is too large, shrinkage occurs when the resin for the receiving layer undergoes a curing reaction, Since the composition ratio of the dyeable resin in the layer is relatively small, the sensitivity may be lowered in some cases. In the present invention, a catalyst can be added to these curing agents in the receiving layer to accelerate the curing reaction. A curing agent of a type that normally does not crosslink unless heated at a high temperature can be suitably crosslinked at a lower temperature than before by using a catalyst, and a preferable releasing performance and heat resistance can be obtained. To perform heat treatment to accelerate the curing reaction,
It is not preferable because the base material and the resin for the receiving layer are discolored, or the image receptor is generally deformed by the deformation of the base material by heating.

As the catalyst, those generally used as polyurethane catalysts are used, and examples thereof include N-methylmorpholine, dimethylmethanolamine, diethylcyclohexylamine, triethylamine, cobalt naphtherate, N, N-dimethylbenzylamine, N. , N-dimethyllaurylamine, N, N-dimethylpiperazine,
Basic catalysts such as triethylenediamine, cobalt naphthenate, benzyltrimethylammonium hydroxide, stannous chloride, stannic chloride, tetra-n-butyltin, dibutyltin dilaurate, tri-n-butyltin acetate, di-n -Butyltin oxide, di-n-octyltin oxide, tin tetrachloride, n-butyltin trichloride, trimethyltin hydroxide, dimethyltin dichloride, dibutyltin laurate, dibutyltin / dilaurate, lead octylate, etc. And so on. The addition amount of the catalyst is 0.05 to 1.
It is preferable to contain 3% by weight. If the amount is too small, the curing promoting effect is low and it is difficult to obtain sufficient heat resistance.

In the present invention, one type of release agent such as dimethyl silicone oil, amino-modified silicone oil, epoxy-modified silicone oil, polyether-modified silicone oil, alcohol-modified silicone oil, polyester-modified silicone resin or the like is used in the dye receiving layer. It is preferable to contain two or more kinds. Examples of commercially available products include S
H200, SF8427, SF8411, SF842
7, SF8428, ST102PA, ST101PA,
AY42-125 (above made by Toray Dow Corning Silicone) etc. are mentioned. As a combination, epoxy-modified silicone oil and methyl-modified silicone oil,
Combinations of polyether-modified silicone oil and methyl-modified silicone oil, polyether-modified silicone oil and methyl-modified silicone oil, alcohol-modified silicone oil and dimethylsilicone oil, etc. are preferred.

Further, in the present invention, a filler is added to the receiving layer,
A surfactant, an ultraviolet absorber, an antioxidant, a fluorescent whitening agent, etc. may be contained. Examples of the filler include silica, titanium oxide, white pigments such as calcium carbonate, and organic fine particles of fluororesin.
It is preferably 5 to 60% by weight based on the receiving layer. Other additives may be appropriately contained in the receiving layer. The thickness of the receiving layer is preferably about 1 to 20 μm, and particularly 1 to 1 μm.
The range of 0 μm is preferable.

Further, as the base material in the image receiving medium of the present invention, synthetic paper, art, fine paper, coated paper, gravure paper, baryta paper, cellulose fiber paper, plastic film and the like are suitable alone or as a laminate thereof. Used for. When using paper such as cellulose fiber paper,
When the surface is pressed by the thermal head, the unevenness of the substrate is picked up and the image quality becomes uneven, so it may not be suitable for some printing devices. It is preferable to use a film, particularly preferably one having excellent heat insulation and cushioning properties with air bubbles inside, but it is more preferable because it has a drawback that it is likely to cause dimensional change or deformation due to heat. It is preferable to use it as a laminated body which is attached using an adhesive or elastic adhesive. The thickness of the high-quality paper, the film and the laminate is 4 to 300 μm, preferably 9 to 200 μm.

For the purpose of improving the appearance and smoothness of the image receiving medium, an intermediate layer can be applied, or after providing the intermediate layer and the image receiving layer, smoothing can be performed by a pressure device such as a super calender. If necessary, the surface or back surface of the image receiving medium may be subjected to antistatic treatment with a surfactant or the like.

[0014]

EXAMPLES The present invention will now be described with reference to examples.

Example 1 Polyethylene terephthalate film (trade name: E51
00, Toyobo Co., Ltd., coated with a two-component curable acrylic adhesive (trade name: Olivine BPS5506, Toyo Ink) on one side (dry coating amount 10 g / m ² ), dried, and then foamed polyethylene terephthalate film (trade name) : Lumirror E60L, Toray) were stacked, and pressed between the hot rolls at a temperature of 90 ° C. for sticking. Furthermore, a polyethylene terephthalate film (commercial name: E5) to which a foamed polyethylene terephthalate film synthetic paper is not attached
100, Toyobo), the above-mentioned two-component curable acrylic adhesive is applied and dried, and a foamed polyethylene terephthalate film (trade name: Lumirror E60L, Toray) is similarly attached and further aged. A substrate was formed. On the upper surface of the thus obtained base foamed polyethylene terephthalate film (trade name: Lumirror E60L, Toray), [solution A] having the following composition was applied to a thickness of 6 μm. [Liquid A] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 9.1 parts Adduct of hexamethylene diisocyanate with trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) 1. 2 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.005 Parts Toluene 10 parts Methyl ethyl ketone 30 parts The coated laminate was dried to prepare an image receiving medium.

On the other hand, as a transfer recording medium, an 8 μm thick aromatic polyamide film having a silicone cured resin film (thickness 1 μm) on the back surface is coated with (Coating agent 2 for ink layer) having the following formulation and dried to receive an image. Created the medium. (Coating for ink layer) Sublimation dye (trade name: Kayaset Blue 714, manufactured by Nippon Kayaku Co., Ltd.) 16 parts Polyvinyl butyral resin (trade name: BX-1, manufactured by Sekisui Chemical Co., Ltd.) 7 parts Isocyanate (trade name: Coronate L, manufactured by Nippon Polyurethanes Co., Ltd. 2 parts Side chain epoxy modified silicone oil (trade name: SF8411, Toray Dow Corning Silicone) 1 part Both ends polyether modified silicone oil (trade name: SF8411, Toray Dow Corning Silicone) 1 part Toluene 35 parts Methyl ethyl ketone 105 parts

Example 2 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution B was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid B] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 8.8 parts Adduct form of hexamethylene diisocyanate with trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) ) 1.6 parts Both ends polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.005 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 3 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution C was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid C] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 6.4 parts Adduct form of hexamethylene diisocyanate with trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) 4. 8 parts Both ends polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.005 Part Toluene 10 parts Methyl ethyl ketone 30 parts

Example 4 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution D was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid D] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (Brand name: 1000GKT, Denki Kagaku Kogyo Co., Ltd.) 5.8 parts Adduct of hexamethylene diisocyanate with trimethylolpropane (Brand name: Takenate D160N, Takeda Yakuhin) 5 6 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0. 005 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 5 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution E was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid E] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 9.1 parts Adduct with hexamethylene diisocyanate and trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) 1. 2 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.005 Part Toluene 10 parts Methyl ethyl ketone 30 parts

Example 6 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution F was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [F liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 8.8 parts Adduct of hexamethylene diisocyanate with trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) ) 1.6 parts Both ends polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.15 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 7 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution G was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [G liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 6.4 parts Adduct form of hexamethylene diisocyanate with trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) 4. 8 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.15 Part Toluene 10 parts Methyl ethyl ketone 30 parts

Example 8 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution H was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [H liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 5.8 parts Adduct with hexamethylene diisocyanate and trimethylolpropane (trade name: Takenate D160N, Takeda Yakuhin) ) 5.6 parts Both ends polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Triethylenediamine 0.15 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 9 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution I was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid I] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 9.1 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 1. 2 parts Both ends polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (product Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 10 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution J was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid J] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 8.8 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) ) 1.6 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin-based Catalyst (Brand name: Format TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 11 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution K was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [K liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 6.4 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 4. 8 parts Both ends polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 12 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid L was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid L] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 5.8 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 5. 6 parts Polyether-modified silicone oil with both ends (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 13 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution M was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [M liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 8.6 parts Tolylene diisocyanate trimer (trade name: Takenate D218, Takeda Yakuhin) 2.8 parts Both-end polyether Modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Format TK- 1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 14 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid N was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [N liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 8.3 parts Tolylene diisocyanate trimer (trade name: Takenate D218, Takeda Yakuhin Co., Ltd.) 3.4 parts Both-end polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 15 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution O was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Solution O] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 5.3 parts Tolylene diisocyanate trimer (trade name: Takenate D218, Takeda Yakuhin Co., Ltd.) 9.4 parts Both ends poly Ether-modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Fomate TK) -1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 16 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid P was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [P liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 4.6 parts Tolylene diisocyanate trimer (trade name: Takenate D218, Takeda Yakuhin Co., Ltd.) 10.8 parts Both ends poly Ether-modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Fomate TK) -1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 17 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid Q was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [Q liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.5 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 3. 3 parts Polyether-modified silicone oil with both ends (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 18 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid R was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [R liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.0 parts Toluene diisocyanate adduct with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 4. 0 parts Both-end polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 19 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution S was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [S liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 6.6 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D218, Takeda Yakuhin) 6. 8 parts Both ends polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 20 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid T was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [T liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 5.9 parts Tolylene diisocyanate trimer (trade name: Takenate D218, Takeda Yakuhin Co., Ltd.) 8.2 parts Both-end polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 21 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid U was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [U liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.5 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 3. 3 parts Polyether-modified silicone oil with both ends (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product) Name: Formate TK-1L Takeda Yakuhin) 0.15 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 22 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution V was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [V liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 7.0 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Chemicals 7.0 parts Silicone oil modified with polyethers at both ends (Product name: SF8427, Toray Dow Corning Silicone) 0.25 parts Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 parts Catalyst Tin -Based catalyst (Product name: Format TK-1L Takeda Yakuhin) 0.15 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 23 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid W was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [W liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.5 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 3. 3 parts Both ends polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product Name: Formate TK-1L Takeda Yakuhin) 0.005 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 24 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution X was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Solution X] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.0 parts Toluene diisocyanate adduct with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 7. 0 parts Both-end polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product Name: Formate TK-1L Takeda Yakuhin) 0.005 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 25 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution Y was used instead of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid Y] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.5 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 3. 3 parts Both ends polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Example 26 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid Z was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [Z liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.0 parts Toluene diisocyanate adduct with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 7. 0 parts Both-end polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Comparative Example 1 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution b was used in place of the solution A used in Example 1.
Printing was performed in the same manner as in. [Liquid b] Polyester resin (Brand name: Byron 290, Toyobo) 9.6 parts Adduct of tolylene diisocyanate with trimethylolpropane (Brand name: Takenate D103H, Takeda Pharmaceutical Co., Ltd.) 0.53 parts Both ends polyether modified silicone Oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product name: Format TK-1L Takeda Chemicals) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Comparative Example 2 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid c was used in place of the liquid A used in Example 1, and printing was performed in the same manner as in Example 1. [C liquid] PVC / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 10 parts Polyether-modified silicone oil with both ends (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Comparative Example 3 An image receiving medium was prepared in the same manner as in Example 1 except that the following Solution d was used in place of Solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [Liquid d] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 10 parts Polyether-modified silicone oil with both ends (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Comparative Example 4 An image receiving medium was prepared in the same manner as in Example 1 except that the following liquid e was used in place of the liquid A used in Example 1, and printing was carried out in the same manner as in Example 1. [Solution e] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: VAGH, Union Carbide) 7.5 parts Adduct of tolylene diisocyanate with trimethylolpropane (trade name: Takenate D103H, Takeda Yakuhin) 3. 3 parts Both ends polyether modified silicone oil (Product name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (Product name: SH200, Toray Dow Corning Silicone) 0.25 part Catalyst Tin catalyst (Product Name: Formate TK-1L Takeda Yakuhin) 0.05 parts Toluene 10 parts Methyl ethyl ketone 30 parts

Comparative Example 5 An image receiving medium was prepared in the same manner as in Example 1 except that the following solution f was used in place of the solution A used in Example 1, and printing was carried out in the same manner as in Example 1. [F liquid] Vinyl chloride / vinyl acetate / vinyl alcohol copolymer (trade name: 1000GKT, manufactured by Denki Kagaku Kogyo Co., Ltd.) 7.0 parts Adduct of tolylene diisocyanate with trimethyl roll propane (trade name: Takenate D103H, Takeda Yakuhin) ) 4.0 parts Both-end polyether modified silicone oil (trade name: SF8427, Toray Dow Corning Silicone) 0.25 part Dimethyl silicone oil (trade name: SH200, Toray Dow Corning Silicone) 0.25 part Toluene 10 parts Methyl ethyl ketone 30 parts

The transfer recording medium and the image receiving medium obtained as described above are overlapped so that the transfer layer of the transfer recording medium and the receiving layer of the image receiving medium face each other, and the speed of the image receiving medium / the transfer recording medium is set. Print at speed = 15, with or without sticking,
The image quality and the pot life were evaluated according to the following criteria. The results are shown in Table 2. Table 1 shows the formulations of Examples and Comparative Examples. [Presence or absence of sticking] ◎: None ○: Almost none △: Somewhat Yes ×: Yes [Good or bad image density] ○: Good ×: No [Good or bad of pot life] ○: Good ×: No

[0048]

[Table 1- (1)]

[Table 1- (2)]

[Table 1- (3)] * 1 Average number of OH groups per molecule * 2 Number of NCO groups / Number of OH groups * 3 Weight ratio in the image receiving layer

[0049]

[Table 2- (1)]

[0050]

[Table 2- (2)]

[0051]

[Table 2- (3)]

[0052]

According to the image receiving medium of the present invention, the dye receiving layer comprises
Since the dyeing resin having an average of 20 or more OH groups per molecule and the curing agent having an isocyanate group are contained and the catalyst for promoting the reaction of these groups is contained, the crosslinking density of the receiving layer resin is sufficiently high. Since it is improved, heat resistance and strength upon heating are increased, and a good image is provided. Claim 2
In the image receiving medium, since the compound having an isocyanate group is an aromatic isocyanate, the crosslinking density of the image receiving layer resin is sufficiently improved, the heat resistance and the strength at the time of heating are increased, and an even better image is provided. The image receiving medium according to claim 3 is
The compounding amount of the NCO group of the compound having an isocyanate group to the compounding amount of the OH group of the dyeing resin is a molar ratio of NCO group /
When the OH group is 0.5 to 1.5, the crosslinking density of the receptor layer resin is sufficiently improved, the heat resistance and the strength upon heating are increased, and a good image can be provided. In the image receiving medium according to the fourth aspect, by using the tin compound as the catalyst, the curing reaction of the image receiving layer resin is sufficiently accelerated, the heat resistance and the strength upon heating are increased, and a good image is provided. Claim 5
In the image receiving medium of No. 3, the addition amount of the catalyst was 0.
When the amount is 1 to 1.3% by weight, the curing reaction of the image receiving layer resin is sufficiently promoted, heat resistance and strength upon heating are increased, and a good image can be provided, and the coating liquid The pot life will be long enough.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an image receiving medium according to the present invention.

Claims (5)

[Claims] 1. An image receiving medium and a recording medium are superposed so that the transfer layer of the recording medium and the receiving layer of the image receiving medium face each other, and the speed of the image receiving medium / the speed of the recording medium> 1, or the feeding of the image receiving body. Amount / feeding amount of recording medium> 1, which is an image receiving medium for thermal transfer used in a sublimation type thermal transfer recording method in which heat printing is performed from the recording medium side under the condition that the receiving layer has an average of 20 or more OH groups per molecule. An image receiving medium for sublimation type thermal transfer comprising a dyeing resin and a curing agent having an isocyanate group, and a catalyst for accelerating the reaction of these groups. 2. The image receiving medium for sublimation thermal transfer according to claim 1, wherein the curing agent having an isocyanate group is an aromatic isocyanate. 3. A curing agent NC having an isocyanate group.
The sublimation type thermal transfer image-receiving image according to claim 2, wherein the compounding amount of O group is a molar ratio of NCO group / OH group = 0.5 to 1.5 with respect to the compounding amount of OH group of the dyeable resin. Medium. 4. The image receiving medium for sublimation thermal transfer according to claim 1, wherein a tin compound is used as a catalyst. 5. The amount of the catalyst added is 0.
The sublimation type image receiving medium for thermal transfer according to claim 4, which is 1 to 1.3% by weight.