JPH01294085A - Production of transfer sheet - Google Patents

Abstract

PURPOSE:To enhance the performance of a repairing transfer sheet, by aging a laminate at normal temperature for at least 10 days, releasing a film from the laminate, coating the laminate deprived of the film with a coating material comprising a urethane resin, a hardener, a softener and a coloring agent, and drying the coating material. CONSTITUTION:A silicone release agent is applied to one side of a carrier film, followed by a heat treatment, and an acrylic resin solution is applied thereto, followed by drying by heating to provide an adhesive layer 10-25mum in film thickness. A protective film subjected to a releasing treatment with a silicone release agent is laid on the adhesive layer to produce a laminate. The laminate is aged at normal temperature for at least 10 days, then the protective film is released from the laminate, and the laminate deprived of the protective film is coated with a coating material comprising a urethane resin, a hardener, a softener and a coloring agent, followed by drying by heating to produce a transfer sheet for repairing an external automotive trim. The film thickness of the coating material is preferably 20-120mum, and the heating is preferably carried out at 100-200 deg.C for 1-10min.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a transfer sheet used when repairing scratches and other minor scratches (hereinafter simply referred to as "minor scratches") on the exterior of an automobile by picking up and painting them. Concerning the manufacturing method.

[Prior Art and Problems to be Solved by the Invention] As shown in Japanese Patent Publication No. 47719/1983, a transfer sheet consisting of a carrier film, a release agent 1-1, an adhesive layer, and a paint layer is known. However, the manufacturing method is complicated, or the performance of the obtained transfer sheet, such as storage stability, adhesion to the vehicle body, and ease of handling, is problematic, and few of them are satisfactory. In particular, transfer sheets for repairing minor scratches on the exterior of automobiles require preparation of transfer sheets in a large number of colors, and the manufacturing method has been an issue. The present invention aims to provide a transfer sheet for repairing minor scratches on the exterior of automobiles using a simple method and having excellent performance.

"Means for Solving the Problems" The present invention consists of (1) applying a silicone mold release agent to one side of a carrier film, subjecting it to heat treatment, applying an acrylic resin solution thereon and drying it by heating to form a glue thickness of 10 to 25 μm; After forming an adhesive layer on the laminate, which was further treated with a silicone mold release agent and overlaid with a protective film, the laminate was aged at room temperature for 10 days or more, and then the laminate film was formed. Peel off,
A method for manufacturing a transfer sheet for automobile exterior repair, which is characterized by applying a paint consisting of a urethane resin, a curing agent, a softening agent, and a coloring agent and drying it by heating, and (2) providing a carrier film with strong or weak releasability on both sides. , apply a silicone mold release agent, heat treat it, apply an acrylic resin solution to the side with low mold release properties, heat and dry it to form an adhesive layer with a thickness of 10 to 25μ, and roll it onto the core. An automobile characterized in that it is rolled up, aged at room temperature for 10 days or more, then unwound, and a coating consisting of a urethane resin, a hardening agent, a softening agent, and a coloring agent is applied on the adhesive layer and then heated and dried. This is a method for manufacturing a transfer sheet for exterior repair.

The carrier film and protective film referred to in the present invention include kraft paper, gratin paper, PVA undercoat)
M, PE (polyethylene) laminated paper, clay coated paper, aluminum foil, OPP film, polyester film, etc.

The silicone mold release agent is one obtained by heating and crosslinking a reactive siloxane polymer and a reactive siloxane as a crosslinking agent in the presence of a catalyst, and the crosslinking reaction may be either a condensation reaction or an addition reaction. As a condensation reaction, a siloxane polymer (for example, one with an end group of =5SiOH) and a siloxane (for example, one with an end group of =5SiOH) and a siloxane (for example, one with an end group of
=, HO8i, etc.) using an organotin catalyst, and addition reactions include siloxane polymers (for example, those with terminal groups of EBSiCH=CH2) and siloxanes (for example, those with terminal groups of H8i). ) with a platinum-based catalyst.

The ratio of the reactive siloxane polymer to the crosslinking agent is 2 to 15 ts in excess of the reaction equivalent, and 5 ts or less of dimethyl silicone oil may be added as another additive. The strength of mold releasability is determined by the amount of dimethyl silicone added and the amount of crosslinking agent added. For example, the greater the amount of dimethyl silicone oil and crosslinking agent, the greater the mold releasability. However, too much is inappropriate and 6
9. In the mold release treatment of the protective film and the mold release treatment on both sides of the carrier film where the mold release property is high, it is necessary to use a crosslinking agent in the range of 2 to 15 units in excess of the reaction equivalent. There is.

The silicone mold release agent to be applied may be an emulsion type, a dispersion type using a smoke agent, or a solvent-free type.
For the 1st fusion type and disversion type, the silicone concentration is adjusted to 4.5~15%, and the amount of adhesion is 0.5%.
~1.5y/r! All you have to do is make it look like this. The coating method may be any of the commonly used methods such as dipping, roll coating, reverse roll coating, air knife coating, and gravure roll coating. The heat treatment temperature after coating is 10
The temperature is 0 to 200°C, and the heat treatment time is 5 to 15 minutes for emulsion type and 10 to 60 seconds for dispersion type.

The aging period of the laminate or the rolled material varies depending on the temperature, but even in summer, the aging period may vary depending on the temperature.
0 days is necessary, and in winter it is likely to be necessary for an even longer period of time.

The acrylic resin must have a molecular weight of 900,000 or more at the end of the reaction, and it suffices if it has adhesive properties (stickiness) and does not yellow due to ultraviolet rays or heat. The thickness may be 10 to 25 μm.

The paint applied on the adhesive layer may be any urethane resin paint that is generally used as automotive paint, such as 100 parts of polyol compound urethane resin (including coloring agent), polyisocyanate resin face. 3 to 18 parts of a hardening agent and a special polyisocyanate resin with an NCO group that is a soft resin with stretching strength (for example, Kansai Paint Co., Ltd., Plastic Hardener) or a soft special polyester resin that has an OH group (for example, Kansai Paint Co., Ltd., Plastic Hardener). An example is one in which 2 to 30 of a softening agent such as 2-knee rubber coat is added to the total amount of the urethane resin and curing agent. The above coating material may be diluted with an appropriate amount of thinner, adjusted to an optimum coating viscosity, and applied to the adhesive layer by spraying or other conventional means to form a coating film with a thickness of 20 to 120 microns.

Heating may be performed at 100 to 200°C for about 1 to 10 minutes.

"Function" The present invention is to once make a laminate of a carrier film, a mold release agent layer, an adhesive layer, and a release-treated protective film (including cases in which the carrier film also serves as the carrier film), and the adhesive layer is used as a mold release layer. The adhesive layer is sandwiched between adhesives and is stabilized by aging at room temperature for a certain period of time. In other words, due to aging, unreacted components (
It is thought that the cross-linking agent and dimethyl silicone oil are uniformly oriented on the adhesive surface and form a kind of barrier layer, and this barrier layer is caused by the solvent in the paint applied after rolling to reach the deep part of the adhesive. It can be assumed that a uniform and smooth coating film is obtained without corrosion, and that the adhesive strength of the adhesive does not decrease.

Furthermore, aging homogenizes the adhesive molecules and evaporates some residual solvent in the adhesive to smooth it out, resulting in a smooth coating film and preventing a decrease in adhesive strength. It is estimated.

Another function is that it protects the adhesive layer and is easy to store as an unpainted product, and can be painted in any color at any time by simply peeling off or rewinding the protective film, making it easy to work with. be.

Furthermore, since the transfer sheet obtained by the present invention is a film composed only of paint after transfer, it has the characteristic that the edges can be polished.

"Examples and Comparative Examples" Example 1 A polyester terephthalate (PET) film with a thickness of 75 μm was used as a carrier film, and one side was coated with an addition reaction type silicone mold release agent (manufactured by Shin-Etsu Chemical Co., Ltd., the proportion of crosslinking agent is the reaction equivalent). The dispersion solution was diluted to 10%, a catalyst was added, and the coating amount was 0.6 y/nt2 (resin content) using the reverse roll coating method.
Heat treatment was performed at 0 to 130°C for 30 seconds. On top of this, apply an acrylic adhesive (molecular weight: 950,000 after completion of reaction, manufactured by Nippon Carbide Industries, KP-480) solution to a thickness (resin content) of 15 μm.
It was coated using a gravure roll coating method and dried by heating.

Using polyethylene laminate paper with a thickness of 80 μm as a protective film, dilute a dispersion solution of an addition reaction silicone mold release agent (manufactured by Shin-Etsu Chemical Co., Ltd., crosslinking agent is used in an amount of 5 units in excess of the reaction equivalent) to 8% and add the catalyst. and the coating amount is 1
y/m2 (resin content) by reverse roll coating, and heat-treated at 120 to 130°C for 30 seconds. A laminate was formed by laminating the protective film so that the release agent layer was in contact with the adhesive layer of the carrier film.

This laminate was aged indoors at 10 to 15°C for 30 days. After aging, remove the protective film and spray paint an automotive urethane paint with the following composition on the adhesive layer with a viscosity of lO~1.
It was diluted with thinner and spray coated to give a coating strength of 5 seconds (Ford Cup Magnetic 4), and dried by heating at 120 to 130° C. for 3 minutes to form a coating film with a thickness of 50 μm.

Polyol-based urethane resin 100 parts (Kansai Paint, Rethane PG80, including coloring agent) Polyinocyanate thread hardener 10 parts (Kansai Paint, Rethane PG80 hardener) Incyanate-based softener 10 parts (Kansai Paint, Ltd., Rethane PG80, including coloring agent) Plastic curing agent) Example 2 A 100μ thick polyester tele-7 tallate (PET) film was used as the middle layer film, and an addition-reactive silicone mold release agent (the cross-linking agent was used in an amount of 2-excess than the reaction equivalent) on one side of the film. Shi-1 Furthermore, a catalyst was added to a dispersion solution of dimethylpolysiloxane 350ca0.8% (manufactured by Shin-Etsu Chemical Co., Ltd.), and the coating amount was 1y/m2 (
Resin content) K was coated, heat treated at 120 to 130°C for 30 seconds, and wound up into a roll.

Addition-reactive silicone mold release agent (ratio of crosslinking agent is reaction equivalent, Shin-Etsu Chemical & 1) on the opposite side of this pm-type treatment
Add the catalyst to the dispersion solution and the coating amount is 0.81.
/m” (resin content) Apply to K at 1120-130℃
Heat treatment was performed for 30 seconds.

Next, apply an acrylic adhesive (molecular weight: 950,000 at the completion of reaction, manufactured by Nippon Carbide Industries, KP-4) on top of this mold release agent.
80) was applied to a thickness (resin content) of 15 μm, heated and dried, and then wound into a roll. After aging this roll-shaped laminate in a room at 10-15°C for 45 days, the film is rewound and an automotive urethane paint with the following composition is sprayed on the adhesive surface to a viscosity of 10-15 seconds (Ford Cabuna 4). Dilute with thinner and spray, 120 ~
It was dried by heating at 130° C. for 3 minutes to form a coating film with a thickness of 60 μm.

Polyol-based urethane resin 100 parts (Kansai Paint Co., Ltd., Rethane PG80. Including colorant) Polyisocyanate-based curing agent 15 parts (Kansai Paint Co., Ltd., Rethane PG80 curing agent) Special polyester-based softening agent 12 parts (Kansai Paint Co., Ltd., Rethane PG80, including coloring agent) Knee Rubber Coat) Comparative Example 1 Made in the same manner as in Example 1 except that the aging period was 1 day.

Comparative Example 2 A product made in the same manner as in Example 2 except that the aging period was 3 days.

Comparative Example 3 A product aged for 30 days without using the protective film (guard film) subjected to release treatment in Example 1.

Comparative Example 4 ゛In Example 1, the molecular weight of the adhesive was 60 after the reaction was completed.
Ten thousand things.

Comparative Example 5 In Example 2, the molecular weight of the adhesive was 500,000 after the reaction was completed.

The following table shows the results of comparing the smoothness, gloss, uniformity, adhesion strength to the iron plate, overall workability, and economic efficiency of the coating films of the transfer sheets obtained in the above Examples and Comparative Examples. ○ indicates good, Δ indicates slightly poor, and × indicates poor.

Result Painted surface condition Smoothness ○ OΔ Δ ○ Δ Δ Gloss
○ ○ Δ Δ Δ Δ Δ Uniformity
○ ○ Δ Δ Δ o O adhesive strength (glue) ○
○ Δ Δ Δ Δ ΔWorkability ○ ○ ○
OX ○ ○ Economical ○ ○ Δ ○ × Δ O
"Effects of the Invention" In the present invention, a release-treated carrier film,
By performing a simple operation of aging the laminate of the adhesive layer and the release-treated protective film (including cases where it also serves as a carrier film) for a certain period of time, the paint can be applied uniformly to the adhesive layer. It shows the effectiveness.

Claims (2)

[Claims] (1) Apply a silicone mold release agent to one side of the carrier film, heat treat it, apply an acrylic resin solution on top of it, heat dry it to form an adhesive layer with a thickness of 10 to 25μ, and then apply it on top of it. After aging a laminate of protective films treated with a silicone mold release agent for 10 days or more at room temperature, the protective film of the laminate is peeled off, and the urethane resin, curing agent, softening agent, and coloring are removed. A method for manufacturing a transfer sheet for automobile exterior repair, which comprises applying a paint consisting of a paint and heating and drying it. (2) Apply a silicone mold release agent to both sides of the carrier film with varying degrees of releasability, apply heat treatment, apply an acrylic resin solution to the side with lower mold releasability, and heat dry to create a glue thickness of 10~ A 25 μm adhesive layer is formed, wound into a roll around a core, aged at room temperature for 10 days or more, and then unrolled.The adhesive layer is coated with a urethane resin, a hardening agent, a softening agent, and a coloring agent. A method for manufacturing a transfer sheet for automobile exterior repair, which is characterized by applying paint and heating and drying it.