JP3004535B2 - Automotive coating film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film for protecting a paint film of an automobile which is temporarily used to protect a paint film of an automobile body during transportation or storage of the automobile.

[0002]

2. Description of the Related Art Recently, when a car manufactured by an automobile manufacturer is transported or stored, it is applied to a car body or the like by the action of stones, dust, dust, iron powder, bird droppings, acid rain, gas, and the like. There is a problem that the coating film is damaged, the coating film undergoes deterioration in appearance such as a change in gloss and discoloration, and the commercial value is reduced. In particular, there is a high probability of occurrence of such deterioration of the coating film in an export vehicle having a long transportation time and a long storage time. Therefore, conventionally, a wax-based coating film protective agent mainly composed of paraffin has been used, and the coating film has been protected by applying the protective agent to the surface of a coating film of an automobile. However, the wax-based coating film protective agent has insufficient coating film protecting performance against iron powder, bird droppings, acid rain, and the like. When the system coating film protective agent is removed with a solvent or the like, a problem of pollution caused by waste liquid and a problem of treatment of waste liquid occur. For this reason, as disclosed in JP-A-2-300281 and JP-A-3-221169,
There has been proposed a method of applying a pressure-sensitive adhesive film to the surface of an automobile body to protect a paint film.

[0003]

However, when an adhesive film is applied as described above, if the film is deteriorated by outdoor exposure for a long period of time, the adhesive together with the film is peeled off from the coating film when the film is peeled off from the body surface of an automobile. However, there is a problem that the adhesive may remain on the surface of the coating film and become dirty. For this reason, the basic characteristics required of a film for protecting automobile coating films are that the films are less deteriorated even if they are exposed outdoors for a long period of time, and that the coating films do not cause contamination such as adhesive residue. In recent years, coating films for automotive coatings have been relatively softened, and various additives have been added to improve coating film performance, so that aluminum, stainless steel, colored steel plates, resin plates, etc. have been conventionally used. When the pressure-sensitive adhesive film used for surface protection is used for automotive coating film protection, stress due to deformation of the support or the pressure-sensitive adhesive layer is applied to the coating film, or additives in the coating film move to the pressure-sensitive adhesive layer. Or, for this reason, bubbles are mixed between the film and the coating film to form air bubble marks, wrinkle marks when attaching the film, or marks at the edge of the film are generated. In addition, there is a problem that the appearance of the coating film is significantly impaired. The present invention has been made in view of the above points, there is no risk of contaminating the coating film or impairing the aesthetics of the coating film, stones, dust, dust, iron powder, It is an object of the present invention to provide a film for protecting automotive coatings that can protect bird droppings, acid rain, gas, and the like.

[0004]

SUMMARY OF THE INVENTION The automotive coating protective film according to the present invention has an ultraviolet transmittance of 190 to 370 in wavelength.
A colored polyolefin-based film having a molecular weight of 10% or less in the range of nm is used as a support and has a number average molecular weight of 15,000.
0 or less of polyisobutylene, butyl rubber, or polybutene as a main component, and 0.1 to 10 parts by weight of a release agent based on 100 parts by weight of the main component, and a terpene or terpene phenol-based tackifier. Is 1 to
An adhesive layer prepared by blending 100 parts by weight and 0.1 to 10 parts by weight of an additive for automotive paint is formed on a support. In the present invention, a support comprising 0.1 to 5 parts by weight of an additive for automotive coatings added to a colored polyolefin-based film having a transmittance of ultraviolet light of 10% or less in a wavelength range of 190 to 370 nm. Is preferred. Further, it is preferable that a polyolefin-based film colored white in N7 or more in the Munsell color system is used as the support. Furthermore, in the present invention, it is preferable to use at least one of silicone as a release agent, and an anti-drip agent, a surfactant, a leveling agent, a weather resistance improver, and a rheology control agent as an additive for automotive coatings. .

In the present invention, a polyolefin film is used as a support. As the polyolefin-based film, a homopolymer or copolymer of an α-olefin such as ethylene, propylene or butene, or a copolymer of a monomer such as vinyl acetate or methyl methacrylate can be used. Polyolefin-based films are excellent in weather resistance and heat resistance, but antioxidants, ultraviolet absorbers, lubricants, plasticizers, etc. are added for the purpose of further improving these properties and improving workability and workability. It can also be used. Among the polyolefin-based films, a polypropylene-based film can be preferably used because it has heat resistance higher than the ambient temperature of use.

Coloring of the polyolefin-based film serving as a support can be carried out by adding a pigment which is usually performed, or by printing on the back surface of the support. Here, the pigment to be added and the ink to be printed need to have weather resistance for the purpose of the present invention, and it is preferable to use an inorganic material having high weather resistance. The degree of coloring is to improve the weather resistance of the polyolefin film or the pressure-sensitive adhesive serving as the support.
It is necessary to set the amount of transmitted ultraviolet light to be 10% or less, more preferably 1% or less in the range of 190 to 370 nm. In the present invention, it is preferable to use a support comprising 0.1 to 5 parts by weight of a coating additive added to a polyolefin film.

The color of a support formed of a polyolefin-based film may be determined based on the price, processability, characteristics of the support, and the like. A Munsell color system having a white color of N7 or more is preferable. In the Munsell color system, achromatic colors are represented by the symbol N, and in the arrangement, ideal black is set to 0, ideal white is set to 10, and the difference in the sense of brightness between them is divided into equal rates. Represent.

When carbon black or the like is used to make black, high concealing and blocking properties can be obtained, so that the addition of a small amount can reduce the amount of transmitted ultraviolet light to 10% or less. It is not preferable because the temperature rise is large and the temperature of the film increases to 80 ° C. or more due to direct sunlight in summer, and depending on the type of the coating film, a problem such as thermal deformation may occur. On the other hand, when the white color is N7 or more in the Munsell color system, the temperature rise is preferably as small as 50 to 60 ° C. However, when a white pigment alone is used to make the white color of N7 or more in the Munsell color system, the weather resistance of the support itself becomes insufficient, so that it is necessary to add a weather resistance improver. Examples of the weather resistance improver include antioxidants such as amine-based, quinoline-based, hydroquinone-based, phenol-based and phosphite-based antioxidants, and salicylic acid derivatives, benzophenone-based, benzotriazole-based, and hindered amine-based ultraviolet rays. An absorber, a light stabilizer, or the like can be used, and the amount of addition thereof is in the range of 0.1 to 5% by weight, more preferably 0.1 to 5% by weight.
１1% by weight. If the addition amount is less than 0.1% by weight, the effect of the addition cannot be expected, while if the addition amount exceeds 5% by weight, the additive may migrate to the adhesive and adversely affect the adhesive. .

By coating an adhesive on one side of a support formed of a polyolefin-based film and providing an adhesive layer, the film for protecting automotive coatings according to the present invention can be prepared. As for, those containing polyisobutylene, butyl rubber and polybutene as main components are used. Polyisobutylene is a polymer of isobutylene, and butyl rubber is mainly composed of a copolymer of isobutylene and isoprene, and is obtained by copolymerizing a monomer having a crosslinkable functional group such as carboxylic acid and hydroxyl group, or chlorine. Can also be used. Further, polybutene is a copolymer mainly composed of isobutylene and a structural isomer such as 1-butene or n-butene. These polyisobutylenes,
Butyl rubber and polybutene may be used alone or in combination, but those having a number average molecular weight of 150,000 or less are used. By using a material having such a relatively small molecular weight, stress relaxation of the pressure-sensitive adhesive can be increased. Number average molecular weight is 150
If it exceeds 000, the trace of sticking of the coating film protecting film on the coating film of an automobile as an adherend is likely to occur.

Examples of the release agent used as the second component of the pressure-sensitive adhesive include vegetable oils, aliphatic soaps, silicones, fluororesins, substances containing long-chain alkyl groups such as waxes and alkyl carbamates, and the like. In particular, silicone is preferable because it has a high effect of preventing the occurrence of film sticking marks and a long-term effect of suppressing an increase in the adhesive force of the pressure-sensitive adhesive over time. As this silicone resin, Si-O-Si
Can be used those having various molecular weights and modified ones having a siloxane bond represented by the formula: straight silicone oils such as dimethyl silicone and methyl phenyl silicone oil, copolymers with polyoxyalkylenes, and amino-modified Examples include a modified silicone oil such as silicone, or an emulsion thereof. The release agent is added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the main component of the pressure-sensitive adhesive. If the added amount is less than 0.1 part by weight, a substantial effect due to the addition of the release agent cannot be obtained, and if the added amount exceeds 10 parts by weight, the adhesive strength due to the release agent is remarkably reduced, which is not preferable.

In the present invention, a terpene or terpenephenol-based tackifier is used as the tackifier used as the third component of the pressure-sensitive adhesive.
A terpene such as pinene or dipentene as a main component, a copolymer of phenols such as phenol or bisphenol, and a modified product thereof by hydrogenation or the like can be used. By the addition of the tackifier, a decrease in adhesive strength due to a release agent or an additive for automotive paint can be suppressed, and an appropriate adhesive strength can be maintained. The addition amount of the terpene or terpene phenol-based tackifier is in the range of 1 to 100 parts by weight based on 100 parts by weight of the main component of the pressure-sensitive adhesive. If the amount is less than 1 part by weight, a substantial effect due to the addition of the tackifier cannot be obtained.
If the amount is more than the weight part, cloudiness of the adherend or transfer of the pressure-sensitive adhesive to the adherend occurs, and weather resistance is undesirably reduced.

The additive for automotive paint used as the fourth component of the pressure-sensitive adhesive is preferably an additive contained in the paint of the automotive paint film to which the adhesive film for protecting automotive paint film according to the present invention is applied. Agents, surfactants, leveling agents, weatherability improvers, rheology control agents, fungicides, preservatives, electrostatic coating aids, etc., and at least one or more are used. Some automotive coating additives have the same effect but have multiple effects. The amount of the additive for automotive paint is set in the range of 0.1 to 10 parts by weight as the amount of each additive based on 100 parts by weight of the main component of the pressure-sensitive adhesive. If the added amount is less than 0.1 part by weight, a substantial effect due to the addition cannot be obtained, and if it exceeds 10 parts by weight, the components of each additive migrate from the adhesive to the coating film side, and Is undesirably denatured or transferred to the surface of the coating film and remains on the surface of the coating film when the film for protecting the coating film is released from the mold.

The anti-dripping agent of the automotive additive used in the present invention is an additive added to a paint in order to prevent the paint from dripping and flowing when a coating film is formed on a nearly vertical object to be coated. The rheology control agent is added to adjust the fluidity and viscosity of the paint. It is used to control the viscosity of paints and to give structural viscosity to paint fluids and to prevent dripping. Some anti-dripping agents and rheology control agents act as both. Examples thereof include carboxymethylcellulose, sodium alginate, colloidal silica, organic bentonite, and aluminum stearate.

The weather resistance improver is added to improve the weather resistance, and is typically an antioxidant or an ultraviolet absorber. Among them, the antioxidant is a chemical added for preventing oxidative deterioration, and is also called an antioxidant or an ozone deterioration preventive. Radical chain reaction inhibitor to prevent radicals generated by receiving light or heat energy from proceeding to the next chain process, and peroxides that decompose peroxides generated during the oxidation process into stable compounds It is roughly divided into decomposers. As the former, phenol-based and aromatic amine compounds are typically used, and as the latter, sulfur-based and phosphorus-based compounds are typically used. As an antioxidant, N, N,
N-di-2-naphthyl-p-phenylenediamine, hydroquinone-based 2,5-di- (t-amyl) hydroquinone, quinoline-based trimethyldihydroquinoline polymer, 6-ethoxy-2,2,4- Trimethyl-
1,2-dihydroquinoline, 2,2-dihydroquinoline
6-di-t-butyl-p-cresol, 2,2′-methylenebis- (4-methyl-6-t-butylphenol), 4,4′-butylidene-bis- (3-methyl-6
-T-butylphenol), 4,4'-thio-bis-3
-Methyl-6-t-butylphenol, stearyl-β
-(3,5-di-t-butyl-4-hydroxyphenol propionate, tetrakis- [methylene-3-
(3 ′, 5′-di-tert-butyl-4′-hydroxyphenyl) propionate] methane, 1,3,5-trimethyl-2,4,6-tris- (3,5-di-tert-butyl-
4-hydroxy-benzyl) benzene, 1,1,3-tris- (2-methyl-4-hydroxy-5-t-butylphenol) butane, sulfur-based dilaurylthiodipropionate, distearylthiodipropionate ,
Lauryl stearyl thiodipropionate, dimyristyl thiodipropionate, phosphorus-based triisodecyl phosphite, diphenyl isodecyl phosphite,
Triphenyl phosphite, trinolyl phosphite,
As a phosphite, triphenyl phosphite, for metal deactivation use, N-salicyloyl-N ′
-Aldehyde hydrazine, N-salicyloyl-N'-acetylhydrazine, N, N'-diphenyloxamide,
N, N'-di- (2-hydroxyphenyl) oxamide is exemplified.

The ultraviolet absorber is a substance added to prevent deterioration due to ultraviolet rays, and salicylic acid derivatives, benzophenones and benzotriazoles are preferably used. Illustrative examples of UV absorbers include phenyl salicylate, pt-butyl-phenyl-salicylate, p-octylphenyl-salicylate, and 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy in the benzophenone system. In 4-n-octoxybenzophenone, 4-dodecyloxy-2-hydroxy-benzophenone, and benzotriazole, 2- (2′-
(Hydroxy-5'-methyl-phenyl) benzotriazole, 2- (2'-hydroxy-3'-t-butyl-
5'-methyl-phenyl) -5-chloro-benzotriazole, 2- (2'-hydroxy-4'-n-octoxy-phenyl) benzotriazole.

The surfactant is a compound containing a hydrophilic group and a lipophilic group in an appropriate ratio, and includes anionic, cationic, nonionic and amphoteric surfactants. Detergent cleaning, penetration,
It is added for the purpose of dispersing, agglomerating, emulsifying, demulsifying, solubilizing, foaming, defoaming, lubricating, soft, antistatic, water repellent, sterilizing, and rust preventing effects.

The leveling agent is an additive for the purpose of smoothing the coating film. The leveling agent is also affected by the resin constituting the coating film, the boiling point of the solvent, and the like. It lowers the surface tension. For this, a surfactant, a silicone-based surfactant, and a fluorine-based surfactant are used.

It goes without saying that the pressure-sensitive adhesive used in the present invention may contain a compounding agent which is generally compounded, such as a coloring agent, in addition to the first to fourth components. When the additive for automotive paint is contained in the support, it can be obtained by blending the additive for automotive paint with the polyolefin resin, melt-kneading with an extruder or the like, and extruding into a film shape with a T-die or the like. it can. The automotive paint additive may be added to both the support and the adhesive. When coloring the support by printing, an additive for automotive paint may be added to the ink. Then, by applying the pressure-sensitive adhesive prepared by mixing the components as described above to one surface of the support and providing a pressure-sensitive adhesive layer, it is possible to produce the automotive coating protection film according to the present invention. Yes, by sticking this film for car coating protection on the surface of the body of the car with an adhesive, the coating applied to the car is stone, dust,
It can protect from dust, iron powder, bird droppings, gas, acid rain, etc.

[0019]

The film for protecting automotive coatings produced as described above uses a colored polyolefin-based film having a transmittance of ultraviolet rays of 10% or less in a wavelength range of 190 to 370 nm as a support. Sex can be obtained. The number average molecular weight of the main component of the adhesive is 150,000.
Since the following polyisobutylene, butyl rubber, and polybutene are used, the stress relaxation of the adhesive can be increased, and the release agent to be blended as the second component bleeds out between the adhesive layer and the coating film. By imparting appropriate lubricity between the agent layer and the coating film, the stress applied to the coating film due to deformation during application of the film for protecting the coating film and during use can be suppressed. Furthermore, since the automotive paint additive is compounded as a fourth component in the adhesive, the transfer of the automotive paint additive contained in the paint film from the paint film to the adhesive layer is suppressed, and the paint is added to the paint film. Deterioration can be prevented from occurring. In addition, since a terpene or terpene phenol-based tackifier is compounded as a third component in the adhesive, the adhesive force is reduced by a release agent compounded as the second component or an automotive paint additive compounded as the fourth component. And maintain proper adhesive strength.

By adding and adding an automotive paint additive to the support, the automotive paint additive added to the pressure-sensitive adhesive layer can be added from immediately after the production of the automotive coating protective film to the time of use or during use. This is for suppressing the concentration of the additive for automotive coatings from being reduced in the pressure-sensitive adhesive layer by diffusing into the support. When the concentration of the paint additive in the pressure-sensitive adhesive layer decreases, the components of the paint additive in the automotive coating that are easily transferred tend to transfer from the coated film to the pressure-sensitive adhesive layer. This is because there is a risk of causing damage. In addition, since the component for coloring the support deteriorates the weather resistance of the support, the addition of an additive for automotive coatings can suppress the deterioration due to the coloring component and improve the weather resistance of the support.

[0021]

Next, the present invention will be described in detail with reference to examples. (Example 1) 3 parts by weight of titanium oxide (trade name of "Titanium dioxide", trade name of Ishihara Sangyo Co., Ltd.) as a white colorant with respect to 97 parts by weight of polypropylene resin (trade name "AS171A" of Sumitomo Chemical Co., Ltd.) 0.1 parts by weight of an agent (Sumitomo Chemical Co., Ltd. product name "MU41") was added and kneaded, and the mixture was extruded by a T-die method to obtain a thickness of 4 parts.
A 0 μm polypropylene film was prepared. This film had a light transmittance of 1% or less at a wavelength of 190 to 370 nm and was N9 white in the Munsell color system. Then, using this film as a support, the pressure-sensitive adhesive prepared by the formulation in the column of "Example 1" in Table 1 was applied to the surface so as to have a thickness of 5 μm, and the pressure-sensitive adhesive layer was provided. A protective film was made.

(Examples 2 and 3) The pressure-sensitive adhesive prepared according to the formulation in the column of "Example 2" or "Example 3" in Table 1 was applied so as to have a thickness of 5 μm. In the same manner, a film for protecting automotive coatings was prepared.

(Comparative Examples 1, 2, and 3) An adhesive prepared in accordance with the composition of "Comparative Example 1,""Comparative Example 2," or "Comparative Example 3" in Table 1 was applied so that the thickness became 5 μm. Is
In the same manner as in Example 1, a film for protecting an automobile coating film was prepared.

[0024]

[Table 1]

* 1 Tonex Corporation product name "MM
L-140 "* 2 BASF Japan Corporation product name" Opanol B
50 "* 3 BASF Japan K.K.
10 "* 4 Shin-Etsu Chemical Co., Ltd. product name" KF96 "* 5 Yashara Chemical Co., Ltd. product name" YS Resin P "
X1150 "* 6 Big Chemie product name" BYK-306 "* 7 Sumitomo Chemical Co., Ltd. product name" Sumilyzer BH "
T "

The film for protecting the paint film prepared in Examples 1 to 3 and Comparative Examples 1 to 3 was attached to the painted surface of a steel plate coated with a black acrylic automotive paint, and the initial adhesive strength and the adhesion to the paint film were determined. The effects were investigated. Table 2 shows the results. The initial adhesive strength was measured at a peel angle of 90 ° and a peel speed of 200 mm / m.
In, the measurement was performed under the conditions of a measurement atmosphere of 20 ° C. and a relative humidity of 65%. In addition, a test for examining the effect on the coating film was conducted using A (Nippon Paint Co., Ltd. product name "9050") and B (Nippon Paint Co., Ltd. product name "5
61C1 ", C (Nippon Paint Co., Ltd. product name" 650
PZ "), three coatings were applied to each of the A coating, B coating and C coating. At June, 1993, an outdoor exposure table facing south at 45 ° in the Yuki Plant of Hitachi Chemical Co., Ltd. The test was performed by outdoor exposure for three months until the moon. If the result is good without bubble marks and film boundary marks,
A mark indicating a bubble mark and a film boundary mark that can be recognized by a coating expert is indicated by “△”, and a mark having a clear bubble mark and a film boundary mark to all eyes is indicated by “×”.

[0027]

[Table 2]

As can be seen from Table 2, each of the experimental examples has a high initial adhesive force and little influence on the coating film, whereas Comparative Example 1 has a high initial adhesive force but a large adverse effect on the coating film. In Comparative Examples 2 and 3, the initial adhesive strength was low and the bad influence on the coating film was large.

Example 4 Example 1 was repeated except that a Munsell color system of N8 was used as the polypropylene film.
In the same manner as described above, a film for protecting an automobile coating film was prepared.

Comparative Example 4 Example 1 was repeated except that a Munsell color system of N5 was used as the polypropylene film.
In the same manner as described above, a film for protecting an automobile coating film was prepared.

Comparative Example 5 Example 1 was repeated except that a Munsell color system of N2 was used as a polypropylene film.
In the same manner as described above, a film for protecting an automobile coating film was prepared. The coating film protection films prepared in Examples 1 and 4 and Comparative Examples 4 and 5 were attached to the painted surface of a steel plate coated with black acrylic automotive paint A, and the effects on the surface temperature and the coating film were examined. Was. Table 3 shows the results.

[0032]

[Table 3]

As can be seen from Table 3, in Comparative Examples 4 and 5, the surface temperature was increased and the coating film was greatly affected, but in Examples 1 and 4 where the Munsell color system was N7 or more. It is confirmed that there is no such a problem in the case of.

(Examples 5, 6, 7 and Comparative Example 6 ) Polypropylene resin (trade name "A", Sumitomo Chemical Co., Ltd.)
S171A)) 97 parts by weight of titanium oxide (Ishihara Sangyo Co., Ltd. “Titanium Dioxide”) was added as a white colorant in an amount of 3 parts by weight, and the resulting base was kneaded with the additives for automotive coatings shown in Table 4. An extruded polypropylene film having a thickness of 40 μm was prepared by a T-die method. This film has a wavelength of 19
The light transmittance at 0 to 370 nm was 1% or less, and N9 was white in the Munsell color system. Using this film as a support, the composition shown in Table 4 was applied as an adhesive so as to have a thickness of 5 μm to prepare a film for protecting an automobile coating film.
The films for protecting automobile coating films prepared in Examples 5 to 7 and Comparative Example 6 were stuck on each of three types of acrylic black coated plates D, E, and F, and after the initial adhesive strength and outdoor exposure test (6 to 9) 3 months before the month, 6 months from June to November)
Was evaluated for its effect on the coating film. Table 4 shows the results.

[0035]

[Table 4]

* 2 to * 7 are the same as the symbols in Table 1. * 8 Sumitomo Chemical Co., Ltd. product name "AS171A" * 9 Ishihara Sangyo Co., Ltd. "Titanium dioxide" * 10 Sumitomo Chemical Co., Ltd. product name "MU41" * 11 Soken Chemical Co., Ltd. product name "Microgel" * 12 Geigy Co., Ltd. "Tinuvin 622LD" Coating evaluation symbols are the same as in Table 3 Comparative Examples have a large effect on coatings, but Examples have no effect on coatings. Good, almost not seen.

[0037]

As described above, the present invention uses a colored polyolefin film having a transmittance of ultraviolet rays of 10% or less in a wavelength range of 190 to 370 nm as a support, so that the weather resistance of the support is sufficiently improved. Can be obtained. In addition, at least one of polyisobutylene, butyl rubber, and polybutene having a number average molecular weight of 150,000 or less is used as a main component, and a mold release agent is used in an amount of 0.1 to 10 parts by weight with respect to 100 parts by weight of the main component. 1 to 100 parts by weight of a phenolic tackifier,
Since the pressure-sensitive adhesive layer prepared by blending 0.1 to 10 parts by weight of an additive for automotive paint is formed on the support, the main component of the pressure-sensitive adhesive is relatively low molecular weight polyisobutylene, butyl rubber, polybutene. As a result, the stress relaxation of the pressure-sensitive adhesive can be increased, and the release agent blended as the second component bleeds out between the pressure-sensitive adhesive layer and the coating film, so that the pressure between the pressure-sensitive adhesive layer and the coating film can be reduced. , And a stress applied to a coating film to be applied due to deformation during application of the coating film protecting film and during use can be suppressed.

Further, the additive for automotive paint contained in the coating film is obtained by the additive for automotive paint incorporated in the pressure-sensitive adhesive as a fourth component, and further by the additive for automotive paint contained in the support. Can prevent the deterioration of the coating film by suppressing the transfer from the coating film to the pressure-sensitive adhesive layer, and can suppress the trace of air bubbles mixed between the support and the coating film and wrinkles at the time of application. It is possible to prevent traces, traces at the ends and the like from being attached to the coating film. In addition, the terpene or terpene phenol-based pressure-sensitive adhesive compounded as a third component in the pressure-sensitive adhesive compensates for a decrease in adhesive strength by a release agent compounded as a second component or an automotive paint additive compounded as a fourth component, Further, there is an effect that an increase in the adhesive force of the pressure-sensitive adhesive, which occurs with time, is suppressed synergistically with other additive components and an appropriate adhesive force is maintained.

Continuing from the front page (72) Inventor Koji Hinomori 1150 Gojomiya, Shimodate, Ibaraki Pref.Hitachi Chemical Industry Co., Ltd.Yuki Plant (72) Inventor Muneaki Toyama 19-17 Ikedanakamachi, Neyagawa-shi, Osaka In-company (56) References JP-A-5-98223 (JP, A) JP-A-6-128540 (JP, A) JP-A-3-47886 (JP, A) (58) Fields investigated (Int. . ⁷ , DB name) C09J 7/02

Claims (5)

(57) [Claims] An ultraviolet light transmission amount of 190 to 370 nm.
A colored polyolefin-based film having a molecular weight of 10% or less as a support, and containing, as a main component, at least one of polyisobutylene, butyl rubber, and polybutene having a number average molecular weight of 150,000 or less.
0.1 to 10 parts by weight of a releasing agent and 0 to 1 part by weight of a terpene or terpene phenol-based tackifier to 0 part by weight.
A film for protecting automotive coatings, wherein an adhesive prepared by mixing 00 parts by weight and 0.1 to 10 parts by weight of an additive for automotive paint is formed on a support. 2. The film for protecting automotive coatings according to claim 1, wherein 0.1 to 5 parts by weight of an additive for automotive coatings is contained in a polyolefin film as a support. 3. The film for protecting automotive coatings according to claim 1, wherein the film is a polyolefin-based film colored white with N7 or more in a Munsell color system. 4. The automotive coating protection according to claim 1, wherein silicone is used as the release agent.
For film . 5. An anti-drip agent as an additive for an automotive paint,
5. The film for protecting automotive coatings according to claim 1, wherein at least one of a surfactant, a leveling agent, a weather resistance improving agent, and a rheology controlling agent is used.