JPH0711110B2 - Activator composition for transfer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a transfer target and an activated transfer sheet by applying to a print pattern on a transfer sheet to activate (dissolve or swell) the print pattern. The present invention relates to a transfer activation liquid composition suitable for a transfer method in which a printed pattern is transferred by contacting under pressure, and in particular, the present invention relates to a type in which a transfer sheet is deformed at the time of transfer so as to follow the uneven shape of a transfer target. The present invention relates to a transfer activation liquid composition suitable for the transfer method.

(Prior Art) Various types of activating liquid compositions have been conventionally known for use in this type of transfer system, but they still have unsatisfactory points as described below.

Conventional composition One or a mixture of two or more solvents having a relatively slow drying rate, generally called a slow drying solvent.

When transfer is carried out using this composition, the pattern of the obtained transferred product has no water resistance, and for example, when immersed in warm water of 40 ° C., partial floating or peeling of the pattern occurs in about 1 to 3 days. Will end up. Generally speaking, the water resistance varies depending on the application, but it is desired that there is no abnormality even if it is immersed in 40 ° C. warm water for 5 days or more.

Conventional composition A slow-drying solvent in which a thermoplastic synthetic resin is dissolved. The slow-drying solvent and / or the thermoplastic synthetic resin may be one kind or a mixture of two or more kinds, like the composition.

As a specific example, a nitrocellulose resin and an alkyd resin dissolved in butyl carbitol or cellosolve also have a performance of about 1 to 3 days at 40 ° C., and as a thermoplastic synthetic resin, acrylic resin, ethyl cellulose resin, or polyvinyl butyral. Even if the resin or the like is used alone or as a mixture, neither is sufficient.

Alternatively, in addition to improving the composition of the activating liquid composition as described above, after transfer, a polyurethane resin paint having good penetrability and wettability with respect to the transferred pattern is used, and the penetrability as a solvent in the paint is also improved. It is possible to select and use a good one, but in the case of synthetic resin moldings where this type of transfer is often performed, on the contrary, cracking tends to occur in the moldings due to solvent penetration, and the impact resistance decreases. This is not preferred, and if a thermosetting resin other than polyurethane is used, heating is required for curing, and it is not suitable for many transfer targets made of thermoplastic synthetic resin.

Furthermore, a method of applying a primer to the surface of the molded product prior to transfer is also conceivable. However, as a primer, compatibility and adhesion with the resin component in the molded product and the activation liquid composition, and the printed pattern of the transfer sheet, etc. It is extremely complicated to select the sex in each case.

(Object of the Invention) Accordingly, in the present invention, the pattern transferred to the transfer target has excellent water resistance, does not adversely affect the transfer target, and the transfer itself can be performed in the same manner as the conventional transfer. It is intended to provide an activating liquid composition for use.

(Structure of the Invention) The present inventor has prepared and studied various activating liquid compositions in order to achieve the above-mentioned object. As a result, the solvent has an isocyanate group, which is a component for forming a polyurethane resin. It was confirmed that the above object was achieved by including the compound and the polyol compound.

The present invention has been made as a result of research based on these processes, and the transfer activation liquid composition of the present invention comprises a solvent capable of activating a print pattern formed on a transfer sheet substrate and the solvent. It is characterized in that it contains a compound having an isocyanate group and a polyol compound which is soluble in water and can form a polyurethane resin by a reaction.

Solvent The solvent has the ability to dissolve or swell the printed pattern formed on the substrate of the transfer sheet, preferably does not erode the transferred material to cause cracks, and preferably The printed pattern can be held in a dissolved or swollen state from the time when it is applied to the transfer sheet to the time when the transfer is completed. Solvents that can be adopted from this point of view are, for example, the following: Pentane, hexane, heptane, octane, etc., or a mixture thereof such as gasoline, petroleum, benzine, mineral spirits, petroleum naphtha, etc. Group hydrocarbons, aromatic hydrocarbons such as benzene, toluene, xylene, cyclohexane and ethylbenzene, halogenated hydrocarbons such as trichloroethylene, perchlorethylene, chloroform and carbon tetrachloride, methyl alcohol, ethyl alcohol, propyl alcohol , Butyl alcohol, amyl alcohol, penzyl alcohol, diacetone alcohol and other monohydric alcohols, ethylene glycol, propylene glycol, glycerin and other polyhydric alcohols, acetone, methyl ethyl ketone, methyl isobutyl ketone,
Ketones such as cyclohexanone, methylcyclohexanone and isophorone, ethyl ether, isopropyl ether, ethylene glycol mono-methyl ether, ethylene glycol mono-ethyl ether, diethylene glycol mono-methyl ether, diethylene glycol mono-ethyl ether, diethylene glycol, mono・ Ethers such as butyl ether, diethylene glycol ・ di ・ butyl ether, ethylene glycol ・ mono ・ methyl ether ・ acetate ・ ethylene glycol ・
Acetates such as mono-ethyl ether-acetate-diethylene glycol-mono-methyl acetate, diethylene glycol-mono-ethyl ether-acetate, diethylene glycol-mono-butyl ether-acetate, butyrate esters, etc., nitro hydrocarbons, Nitriles, amines, other acetals, acids, furans, etc.

These solvents may be used alone or in combination of two or more, if necessary.

Isocyanate group-containing compound As a compound having an isocyanate group capable of forming a polyurethane resin by a reaction, an isocyanate (-N
= C = O) group having two or more groups, typically TDI (tolylene diisocyanate) or M
It is a diisocyanate such as DI (diphenylmethane diisocyanate). Of these, TDI has insufficient weather resistance and yellows over time, so MD is used when weather resistance is required.
Use I.

Other diisocyanates include ethylene, tetramethylene, hexamethylene, heptamethylene, octamethylene, decamethylene-p-phenylene, and m.
-Phenylene-, m-toluylene-, and other diisocyanates or naphthalene-1,5-di- (p-isocyanyl-dicyclohexyl) methane, or triisocyanates such as tri- (p-isocyanylphenyl) methane You can

Polyol Compound Specific examples of the polyol capable of reacting with the above-mentioned compound having an isocyanate group to form a polyurethane resin include acrylic polyol, polyester polyol, and polyether polyol. In addition to this, as the polyol, an acrylated alkyd polyol or a cardura-modified alkyd polyol can be used.

While acrylic polyol has good solvent separation and is easy to use in terms of drying, a printed pattern activated by a composition containing it is relatively difficult to delay. Also, polyester polyol is advantageous in that it spreads the printed pattern, but it does not release solvent well and is inferior to acrylic polyol in terms of drying. Therefore, when polyester polyol is used, a matting agent or nitrocellulose resin is apparently added. It is better to improve the drying property of.

There are various modes of combining the above-mentioned solvent, compound having an isocyanate group, and polyol compound.

(A) A method of preparing an activation liquid composition for transfer using either a compound having an isocyanate group or a polyol compound and a solvent.

In this case, after performing transfer using the transfer activation liquid composition, one of the compounds having an isocyanate group and the polyol compound which is not contained in the transfer activation liquid composition. When coating is performed using the transparent coating material as the main component, both compounds can react on the transferred material to form a polyurethane resin. However, it requires two steps.

(B) A method of preparing a transfer activation liquid composition using both a compound having an isocyanate group and a polyol compound and a solvent.

In this case, the polyurethane resin can be produced only by performing the transfer using the transfer activation liquid composition. More preferably, the printed pattern of the outermost layer may be further protected by using the same type of polyurethane resin paint.

(C) A method in which one of the compound having an isocyanate group and the polyol compound is used in excess with respect to the other to form a transfer activation liquid composition together with a solvent.

In this case, it is advisable to perform coating after transfer using a component that reacts with an excess component of the two components capable of forming the polyurethane resin in the transfer activation liquid composition. Alternatively, a compound having an isocyanate group and a polyol compound are used in both the composition of the transfer activation liquid composition and the coating composition for topcoat, provided that one component is excessive in one composition and the other composition is composed in the other composition. It is even more preferable to make excess the component that reacts with the excess component in the one composition. Of course, equimolar amounts of the respective components that form the polyurethane resin may be used in the transfer activation liquid composition and the top coating composition.

In any of the above cases, it is acceptable to add another synthetic resin to the transfer activator composition within a range that does not impair the characteristics of the polyurethane resin, and to use it on the transfer target after transfer. When the solvent in the activating liquid composition is removed by a method of dissolving with water instead of a heat drying method, the extender pigment is activated for transfer for the purpose of improving solubility in water. It may be added to the liquid composition.

Each of the above-mentioned components can be made into a composition by blending them at an appropriate blending ratio in consideration of solubility or dispersibility and dissolving or dispersing them.

Further, when the transfer sheet is deformed in conformity with the shape of the transfer target at the time of transfer, a plasticizer is added to the activation liquid in the sense that the activated printed pattern is easily deformed together with the base material of the transfer sheet. You may keep it. As the plasticizer, general-purpose ones such as DOP (dioctyl phthalate) and DHP (dihexyl phthalate) can be used. However, if a plasticizer containing an OH group such as castor oil or glycerin is used, after transfer, the transferred material is Since the plasticizer remaining on the surface reacts with the isocyanate, the physical and chemical properties of the surface of the obtained product are improved.

The properties of the polyurethane resin produced vary depending on the components used, so it is advisable to use the polyurethane resin properly depending on the intended use. The following are examples thereof: (a) Acrylic polyol and isocyanate (meaning a compound having an isocyanate group, The same applies to the following), the coating film is difficult to spread.

(B) With the combination of polyester polyol and isocyanate, the drying rate of the activating liquid composition is slow.

(C) The combination of the acrylated alkyd polyol and the isocyanate hardly spreads the coating film.

(D) The combination of polyester polyether and isocyanate is the same as in (d) above.

(E) The coating film is difficult to spread with the combination of cardura-modified alkyd polyol and isocyanate.

(F) With combinations of resins and isocyanates other than the above (a) to (e), the water resistance of the printed pattern on the transferred material after transfer is slightly insufficient.

The more specific composition of the transfer activation liquid composition is such that the print pattern is activated, the conformability when the transfer sheet base material is extended (spreadability), the adhesion to the transfer target, and the overcoating. It may be determined in consideration of familiarity and penetrability, that when washing with water after transfer is performed, it does not flow off by washing with a shower or the like, and that the shape of the transferred material is well followed during transfer.

The activating liquid composition for transfer of the present invention can be applied to various transfer sheets as long as the printed pattern can be activated, but in particular, the present invention is such that a transfer film based on a water-soluble film is floated on the water surface. In particular, it is particularly suitable for use as an activator composition for a hydraulic transfer method in which a transfer material is pressed onto the transfer film from above in a state where the print pattern is activated by applying the activator on the transfer film. In addition to the characteristic of the hydraulic transfer method that a printed pattern can be transferred to a transfer target having a complicated shape by applying the hydraulic transfer method, the water resistance of the obtained product is improved.

(Effects of the Invention) According to the present invention, the printed pattern in which the polyurethane resin is adhered to the surface of the final product can be transferred together with the activation liquid for transfer (in some cases, the top coating material), so that the final product has excellent water resistance. It also makes it possible to pass the moist heat test by heating at higher temperatures for testing.

Example A polyvinyl alcohol resin film (manufactured by Nigo Film Co., Ltd., Hi-Selon C-300, thickness 40 μm) and a nitrocellulose resin ink (Moroshi Ink Co., Ltd., KLCF) were used in a gravure printing method to form a rosewood pattern. Two-color printing was performed in the reverse order of the normal printing order.

The printing film obtained above was cut into a square of 800 mm × 800 mm, and the printed surface was floated on the water surface of water in a water tank (inner 950 mm × 950 mm) at a water temperature of 27 ° C.

80 seconds after the printing film was floated, an activating liquid having the following composition was applied using an airless gun so that the application amount was 10 g / m ² .

Activation liquid composition ABS resin plate (made by Japan Synthetic Rubber, thickness 1
mm), the printing film was floated on the surface of water for 100 seconds and then pushed in from above to perform transfer, and then lifted, washed with water, and dried.

After drying, an acrylic urethane resin-based paint (Origin Plate Z manufactured by Origin Electric Co., Ltd.) was applied and cured to a thickness of 10 μm.

The transferred product obtained did not show any abnormality even when immersed in warm water at 40 ° C. for 5 days.

Claims (1)

[Claims] 1. A solvent which is capable of activating a printed pattern formed on a transfer sheet substrate, a compound which is soluble in the solvent and has an isocyanate group, and a reaction with the compound having the isocyanate group. And a polyol compound capable of forming a polyurethane resin by the above method.