JPH02106393A - Sublimation type thermal transfer recording image receiver - Google Patents

Abstract

PURPOSE:To prevent thermal fusion bonding to an ink sheet by providing a dye receiving layer in which sublimation dye made of resin modified with partial hydrolysis of silane coupling agent from phenoxy resin is dyed on a board. CONSTITUTION:Resin modified with partial hydrolysis of silane coupling agent from phenoxy resin is dissolved or dispersed in organic solvent to prepare coating solution. A board is coated with the solution, and dried to form a dye receiving layer in which sublimation dye is dyed, thereby manufacturing a sublimable heat transfer recording image receiver. The modified resin for forming the receiving layer desirably contains 1.0 - 50wt.% of content of partial hydrolysis of silane coupling agent with respect to the phenoxy resin. The coating amount of the receiving layer on the board is desirably 0.1 - 20g/m<2> of solid fraction content.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sublimation type thermal transfer image receptor used in combination with a thermal transfer recording medium having a transfer layer containing a thermal sublimable dye.

[Prior Art] Conventionally, polyester resins have been mainly used as resins for the dye-receiving layer of image receptors on which images are recorded by heat-transferring sublimable dyes in a thermal transfer ink sheet using a sublimation-type thermal transfer recording method. In addition, patents are sometimes found for vinyl chloride, vinyl acetate resin, polystyrene, cellulose resin, etc. Although these resins have good dyeing properties, they have low heat resistance, so they have the problem of fusing with the ink sheet during recording.To solve this problem, these resins are usually coated with silicone oil, etc. It is necessary to contain a mold release agent, which has the disadvantage that the storage stability of images after recording is deteriorated.

[Problems to be Solved by the Invention] In view of these circumstances, the present invention provides a sublimation thermal transfer that does not cause thermal adhesion to an ink sheet and can form images with excellent light resistance and storage stability. The object of the present invention is to provide an image receptor for use in the present invention.

[Means for Solving the Problems] In order to solve the above problems, the present inventors have made repeated studies, and found that phenoxy modified with a partial hydrolyzate of a silane coupling agent was used as a resin for the dye-receiving layer. We have discovered that it is effective to select the resin, and have arrived at the present invention.

That is, the present invention provides an image receptor having a dye-receiving layer on a substrate to which a sublimable dye can be dyed, in which the receptor layer is made mainly of a resin obtained by modifying a phenoxy resin with a partial hydrolyzate of a silane coupling agent. This is an image receptor for type thermal transfer recording.

The dye-receiving layer in the present invention is mainly composed of a partial hydrolyzate of a phenoxy resin and a silane coupling agent as described above, and the partial hydrolyzate is 1.0% by weight or more and 50% by weight based on the phenoxy resin. Used within the range below. The dye-receiving layer can be formed by dissolving or dispersing these in an appropriate organic solvent and applying a coating solution to the substrate.

The phenoxy resin used here is a resin synthesized from divalent phenols and epichlorohydrin, and the divalent phenols are bisphenol A1 dichlorobisphenol A1 bisphenol F1 bisphenol ACP.
, bisphenol L1 bisphenol v1 bisphenol S, and the like.

Further, a partial hydrolyzate of a silane coupling agent is prepared by appropriately combining a difunctional silane coupling agent and a trifunctional silane coupling agent, and adding water and an acid or alkaline catalyst in an organic solvent.

Difunctional silane coupling agents include dimethyldichlorosilane, diphenyldichlorosilane, dimethyldimethoxysilane, dimethyljethoxysilane, diphenyldimethoxysilane, γ-glycidoxypropylmethyljethoxysilane, N-β(aminoethyl)γ- Aminopropylmethyldimethoxysilane and the like can be used.

In addition, trifunctional silane coupling agents include methyltrichlorosilane, phenyltrichlorosilane, methyltrimethoxysilane, phenyltriethoxysilane, decyltrimethoxysilane, vinyltriethoxysilane, γ
-Methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-chloropropyltrimethoxysilane, etc. can be used.

Further, in the present invention, a release agent such as amino-modified silicone, epoxy-modified silicone, alkyd-modified silicone, etc. can be contained in the dye-receiving layer. Use of these silicones further improves the effect of preventing heat fusion with the transfer medium. However, as the silicone content increases, the storage stability after recording deteriorates as described above, so the silicone content is desirably 10% by weight or less based on the amount of resin in the dye-receiving layer.

Incidentally, a filler can also be contained in the dye-receiving layer. Examples of fillers include white pigments such as silica, titanium oxide, and calcium carbonate, and the amount added is preferably 5 to 60% by weight based on the amount of resin in the receiving layer. In addition, the dye-receiving layer may contain a surfactant, an ultraviolet absorber, an antioxidant, etc. as appropriate.

Further, as the substrate in the image receiving medium of the present invention, synthetic paper, art paper, high quality paper, coated paper, cellulose fiber paper, plastic film, etc. may be used alone or in a laminate thereof.
Preferably used.

The coating amount of the dye-receiving layer on the substrate is preferably 01 to 20 g/nf in terms of solid content.

[Example] Next, the present invention will be explained in more detail with reference to Examples.

Example 1 2.4 g of dimethyldimethoxysilane and 1.4 g of methyltrimethoxysilane were dissolved in 20 ml of tetrahydrofuran, 0.3 ml of 1% sulfuric acid was added, and the mixture was stirred at room temperature for 3 hours to perform hydrolysis.

10 g of phenoxy resin [PKHH, manufactured by Tomoe Kogyo Co., Ltd.] was dissolved in 80 ml of tetrahydrofuran, to which was added the hydrolyzate of the above silane coupling agent, and then 0.1 g of dibutyltin oxide was added as a curing catalyst to form a receptor layer. It was used as a coating liquid.

This coating solution is applied to synthetic paper approximately 150 μm thick (product name: YUPO F).
PG-150 (manufactured by Tamago Yuka Synthetic Paper Co., Ltd.) using a wire bar and dried at 80°C for 1 hour to a thickness of approximately 5 μm.
An image receptor of the present invention was prepared by forming a dye-receiving layer.

Comparative Example 1 An image receptor was prepared by forming a receptor layer using only phenoxy resin (PKHH) in the same manner as in Example 1 without adding a hydrolyzate of a silane coupling agent.

Example 2 γ-glycidoxypropylmethyljethoxysilane2.
5 g of vinyltriethoxysilane and 0.8 g of vinyltriethoxysilane were dissolved in 20 ml of tetrahydrofuran, 3 ml of 1% sulfuric acid Q was added, and the mixture was stirred at room temperature for 3 hours to perform hydrolysis.

10 g of phenoxy resin [PKHC1 manufactured by Tomoe Kogyo Co., Ltd.] was dissolved in 80 ml of tetrahydrofuran, the hydrolyzate of the above silane coupling agent was added thereto, and then 0.1 g of dibutyltin diacetate was added as a curing catalyst to form a receptor layer. It was used as a coating liquid.

A receptor layer was formed using this coating liquid in the same manner as in Example 1 to produce an image receptor.

Comparative Example 2 Silicone oil (KF3) was added to phenoxy resin (PKHC) without adding a hydrolyzate of silane coupling agent.
No. 93, manufactured by Shin-Etsu Chemical Co., Ltd.] A receptor layer was formed in the same manner as in Example 1 using a coating solution to which 0.5 g was added to prepare an image receptor.

Example 3 1.2 g of dimethyldimethoxysilane and 0.6 g of phenyltriethoxysilane were dissolved in 20 ml of tetrahydrofuran, 0.3 ml of 1% sulfuric acid was added, and the mixture was stirred at room temperature for 3 hours to perform hydrolysis.

Phenoxy resin [phenoart YP-50, Tobu Kasei (
Co., Ltd.] was dissolved in 80 ml of tetrahydrofuran, the hydrolyzate of the above silane coupling agent was added thereto, and then 0.1 g of dibutyltin oxide was added as a curing catalyst.
g was added to prepare a receptor layer coating solution. A receptor layer was formed using this coating liquid in the same manner as in Example 1 to produce an image receptor.

Comparative Example 3 A receptor layer was prepared in the same manner as in Example 1 using a coating solution prepared by adding 0.5 g of silicone oil (KF393) to phenoxy resin (Phenoate YP-50) without adding a hydrolyzate of a silane coupling agent. An image receptor was prepared by forming the following.

Example 4 1.8 g of dimethyldimethoxysilane and 0.7 g of γ-aminopropyltriethoxysilane were added to 2 g of tetrahydrofuran.
0 ml of the solution, 9.5 ml of 1% aqueous sodium hydroxide solution was added thereto, and the mixture was stirred at room temperature for 3 hours to perform hydrolysis.

10 g of phenoxy resin (BAKEL ITE, manufactured by Union Carbide) was dissolved in 80 ml of tetrahydrofuran, the hydrolyzate of the silane coupling agent was added thereto, and then 0.0 g of dibutyltin diacetate was added as a curing catalyst.
1 g was added to prepare a receptor layer coating solution. A receptor layer was formed using this coating liquid in the same manner as in Example 1 to produce an image receptor.

Comparative Example 4 A receptor layer was formed in the same manner as in Example 1 using a coating solution prepared by adding 1.0 g of silicone oil (KF393) to phenoxy resin (BAKELITE) without adding a hydrolyzate of a silane coupling agent. An image receptor was prepared.

[Evaluation of image receptor] An ink layer coating liquid with the following formulation was applied to a thickness of approximately 1 μm on a 6 μm thick PET film with a silicone cured resin film (approximately 1 μm thick) as a back layer as a sublimation transfer medium. A transfer medium was obtained.

(Ball weight part) Polyvinyl butyral resin, 10BX-1 (manufactured by Tsukisui Kagaku Co., Ltd.) Sublimation dye for cyan, Kayaset 8 Bluef 14 (manufactured by Nippon Kayaku Co., Ltd.) Toluene 45 Methyl ethyl ketone 45 The obtained transfer medium and image receptor were The ink layer of the transfer medium and the dye-receiving layer of the image receptor were overlapped so that they faced each other, and images were recorded from the back side of the transfer medium using a thermal head by varying heating energy. The recording density of the thermal head was 6 dots/mm, and the recording output was 0.42 W/dot.

The image samples after recording were tested for light resistance and the like. The results are shown in Table 1.

Table 1 Note) ■Image density: Macbeth densitometer RD-514 ■Lightfastness: After exposure for 24 hours using a xenon fader, changes in the image were visually determined. ○: Good, ×: Poor ■Storability: After being stored in a dark place at 60° C. for 100 hours, changes in the image were visually judged.

○...Good, ×...Poor ■The sample of Comparative Example 1 could not be tested due to heat fusion.

[Effects of the Invention] As described above, the image receptor configured according to the present invention is not thermally fused to an ink sheet and can provide images with excellent light resistance and storage stability.

Claims (2)

[Claims] (1) An image receptor having a dye-receiving layer on a substrate in which a sublimable dye can be first deposited, characterized in that the receptor layer is mainly made of a resin obtained by modifying a phenoxy resin with a partial hydrolyzate of a silane coupling agent. Image receptor for sublimation thermal transfer recording (2) The content of the partial hydrolyzate of the silane coupling agent is 1.0% by weight or more and 50% by weight based on the phenoxy resin.
The image receptor for sublimation type thermal transfer recording according to claim (1), which is less than