JP7117122B2 - Resin composition and laminate - Google Patents

Description

The present invention relates to resin compositions and laminates.

BACKGROUND ART Paints and paint substitute films are used for painting vehicles such as automobiles. In particular, paints and paint substitute films used for vehicle exteriors are required to have durability such as weather resistance, heat resistance, and water resistance, as well as resistance to oils such as gasoline and brake oil. Therefore, it is preferable that the surface of the paint or paint substitute film as described above is covered with a protective layer.

For example, Patent Document 1 below discloses a paint composition that contains a benzotriazole-based ultraviolet absorber and a triazine-based ultraviolet absorber as essential components and is capable of forming a coating film capable of maintaining the lower layer protective function over a long period of time. . A coating film composed of such a coating composition can be used as a protective layer on the surface of the above coating or coating substitute film.

JP-A-2002-256217

The paint composition disclosed in Patent Document 1 aims to exhibit long-term weather resistance by combining a triazine-based UV absorber with a benzotriazole-based UV absorber. However, benzotriazole-based ultraviolet absorbers tend to shift the absorption wavelength to the longer wavelength side due to interactions with metal compounds. Therefore, the paint composition disclosed in Patent Document 1 may turn yellow when it comes into contact with a metal compound. For example, since water may contain metal components such as calcium and magnesium, the coating composition disclosed in Patent Document 1 may turn yellow when it comes into contact with water. Therefore, a coating film composed of a composition containing a benzotriazole-based ultraviolet absorber, such as the coating composition disclosed in Patent Document 1, is not suitable for fields where water resistance is required. In addition, a cyanoacrylate-based ultraviolet absorber can also be mentioned as an ultraviolet absorber whose interaction with metal compounds, amines, and the like is suppressed. However, the cyanoacrylate UV absorber hardly absorbs light with a wavelength of 340 nm or more, and is sometimes used in combination with a benzotriazole UV absorber or a benzophenone UV absorber that absorbs light with a wavelength of 370 nm or more.

Moreover, the resin composition containing an ultraviolet absorber may contain a light stabilizer from the viewpoint of suppressing the decomposition of the ultraviolet absorber. Oxygen radicals, peroxy radicals, alkyl radicals, and the like, which are radicals involved in resin deterioration, are quenched by the light stabilizer. For example, amino ether-type hindered amine light stabilizers with the N—O—R structure quickly scavenge peroxy radicals. In addition, hindered amine photostabilizers other than amino ether types are first oxidized by oxygen radicals to form nitroxy radicals, and then react with carbon radicals to obtain amino ether hindered amine photostabilizers having an N—O—R structure. agent. Therefore, amino ether-type hindered amine light stabilizers can quickly quench peroxy radicals. On the other hand, hindered amine light stabilizers other than amino ether types can quickly quench oxygen radicals. Since the radical species that can be quickly quenched differ depending on the structure of the light stabilizer, there is room for improvement in the combination of the UV absorber and the light stabilizer.

As described above, conventional coating compositions such as those disclosed in Patent Document 1 are not suitable for fields where water resistance is required. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a resin composition and a laminate that have water resistance and can protect a substrate.

In order to solve the above problems, the resin composition of the present invention is characterized by containing a triazine-based ultraviolet absorber (B) and two or more hindered amine-based light stabilizers (C).

In addition, the two or more hindered amine light stabilizers (C) are an amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and a hindered amine light stabilizer other than an amino ether type ( C2) and preferably.

Further, the hindered amine light stabilizer (C2) other than the amino ether type consists of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid. It preferably contains an ester compound.

Further, the resin (A) is further included, and the content of the ester compound composed of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid is It is preferably 3 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the resin (A).

Further, the amino ether type hindered amine light stabilizer (C1) preferably contains bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate.

Further, the resin (A) is further included, and the content of the bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate is added to 100 parts by mass of the resin (A). On the other hand, it is preferably 0.5 parts by mass or more and 6 parts by mass or less.

Moreover, it is preferable that the triazine-based ultraviolet absorber (B) contains a hydroxyphenyltriazine-based ultraviolet absorber.

Further, the hydroxyphenyltriazine-based ultraviolet absorber is 2-[4-{(2-hydroxy-3-alkyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl )-1,3,5-tridiane.

Moreover, the triazine-based ultraviolet absorber (B) preferably contains a triazine-based ultraviolet absorber having an alkyl group having 12 or 13 carbon atoms.

Moreover, it is preferable that the resin (A) is further included, and the content of the triazine-based ultraviolet absorber (B) is 10 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the resin (A).

Moreover, it is preferable to further contain a fluororesin.

Moreover, it is preferable that a cross-linking agent is further included.

Moreover, it is preferable that the said crosslinking agent is an isocyanate type crosslinking agent.

Moreover, in order to solve the above problems, the laminate of the present invention is characterized by comprising a base material and a resin layer composed of the above resin composition laminated on the base material.

ADVANTAGE OF THE INVENTION According to this invention, the resin composition and laminated body which have water resistance and can protect a base|substrate are provided.

It is a figure which shows roughly the cross section of the laminated body which concerns on embodiment of this invention.

The embodiments illustrated below are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention can be modified and improved from the following embodiments without departing from its gist.

[Laminate]
FIG. 1 is a diagram schematically showing a cross section of a laminate according to an embodiment of the invention. A laminate 1 of the present embodiment includes a substrate 3 and a resin layer 2 laminated on the substrate 3 .

The material of the base material 3 is not particularly limited. The base material 3 is made of resin, metal, ceramics, paper, wood, or a combination thereof, for example. Moreover, the thickness of the base material 3 is not particularly limited, and is selected according to the application of the laminate 1 . The thickness of the base material 3 is, for example, 20 μm or more and 500 μm or less, preferably 30 μm or more and 100 μm or less.

Examples of resins that can be used as the base material 3 include polyvinyl chloride, polyvinylidene chloride, polyvinylidene fluoride, poly(ethylene-tetrafluoroethylene), polycarbonate, polyester, poly(meth)acrylate, polyolefin, polyamide, polyvinyl alcohol, polystyrene, polyurethane and the like. (Meth)acrylate means one or both of acrylate and methacrylate. One of these resins may be used alone, or two or more thereof may be used in combination. When two or more kinds of resins are used in combination, these resins may be mixed to form a single substrate 3, or the substrate 3 may be formed of a plurality of layers made of different resins. Among the above resins, it is preferable to use polyvinyl chloride. The tensile elongation at break of polyvinyl chloride can be easily adjusted by adding a plasticizer or the like. Therefore, by using polyvinyl chloride for the substrate 3, the laminate 1 can follow the adherend surface even if the shape of the adherend surface to which the laminate 1 is adhered is complicated.

The resin layer 2 is a layer made of a resin composition which will be described later.

The thickness of the resin layer 2 is not particularly limited. For example, it is 1 μm or more and 100 μm or less, preferably 3 μm or more and 20 μm or less.

The resin layer 2 is formed by applying a resin composition, which will be described later, onto the substrate 3 and curing the composition. Examples of coating methods for the resin composition include screen printing, gravure printing, bar coating, knife coating, roll coating, blade coating, die coating, spray coating, and dip coating. Among these, screen printing is particularly preferred. Examples of the method for curing the resin composition include hot air drying and a method using an oven or a hot plate. Alternatively, the resin composition is applied onto the substrate 3 with a comma coater (registered trademark) and then dried with hot air, and the resin layer 2 made of the resin composition is peeled off from the substrate 3 and used as a single layer film. can also

In addition, the laminate 1 may include other members such as a pressure-sensitive adhesive layer and an adhesive layer for adhering to the adherend surface as necessary. Moreover, between the resin layer 2 and the base material 3, a single-layer or multiple-layer printed layer, an adhesive layer, or the like may be provided. When the laminate 1 includes a printed layer between the resin layer 2 and the substrate 3, the method for forming the printed layer is not particularly limited. The printed layer is formed by, for example, applying a composition containing a resin, a colorant, a solvent, etc., onto the base material 3 by a method such as screen printing, and then subjecting the composition to drying, curing, or the like as necessary. Further, when the laminate 1 includes a printed layer between the resin layer 2 and the base material 3, after forming the printed layer on the base material 3 as described above, the printed layer is subjected to the above-described process. A resin layer 2 is formed.

[Resin composition]
The resin composition constituting the resin layer 2 contains a resin (A), a triazine-based ultraviolet absorber (B), and two or more types of hindered amine-based light stabilizers (C).

<Resin (A)>
Examples of the resin (A) include resins such as fluorine resins, (meth)acrylic resins, urethane resins, polyester resins, polycarbonate resins, vinyl chloride resins, and acrylonitrile-butadiene-styrene (ABS) resins. (Meth)acryl means one or both of acryl and methacryl. One of these resins may be used alone, or two or more of them may be used in combination. However, the resin (A) preferably contains a fluororesin. The bond energy of the C—F bond in the fluororesin (441 kJ/mol) is greater than the maximum ultraviolet energy (411 kJ/mol) from sunlight. Therefore, the fluororesin is difficult to be decomposed by sunlight. Further, since the C—F bond has a small polarization, the fluororesin has poor reactivity and is difficult to be decomposed by hydrolysis or the like. Therefore, the heat resistance and weather resistance of the resin (A) can be very good by including the fluororesin in the resin (A).

When the resin (A) contains a fluororesin, the fluororesin is not particularly limited, but is preferably a copolymer mainly composed of trifluoroethylene and vinyl ether. Since trifluoroethylene and vinyl ether are almost alternately copolymerized, they are considered to have particularly good weather resistance among fluororesins. Copolymers of trifluoroethylene and vinyl ether are considered to have good compatibility with other resins and additives among fluororesins.

Moreover, the resin (A) preferably contains a (meth)acrylic resin from the viewpoint of adhesion between the resin layer 2 and the substrate 3, compatibility with additives, and the like. Stabilizers such as ultraviolet absorbers (UVA) and light stabilizers (HALS) can bleed out from the resin layer 2 over time due to good compatibility between the resin contained in the resin (A) and the additives. As a result, the weather resistance of the resin layer 2 can be improved as compared with the case where the resin (A) does not contain the (meth)acrylic resin.

Moreover, it is preferable that the resin (A) contains a cross-linking agent. Examples of the cross-linking agent include isocyanate-based cross-linking agents. Further, the isocyanate-based cross-linking agent is preferably a non-yellowing isocyanate-based cross-linking agent. Examples of the isocyanate-based cross-linking agent include an aliphatic isocyanate-derived isocyanate cross-linking agent and an alicyclic isocyanate-derived isocyanate cross-linking agent. Specifically, an isocyanate cross-linking agent derived from hexamethylene diisocyanate (HDI), an isocyanate cross-linking agent derived from hydrogenated xylylene diisocyanate (H ₆ XDI), an isocyanate cross-linking agent derived from hydrogenated diphenylmethane diisocyanate (H ₁₂ MDI), and isophorone diisocyanate (IPDI)-derived isocyanate crosslinkers.

<Triazine-based UV absorber (B)>
As will be described later, the resin composition of the present embodiment uses two or more hindered amine light stabilizers (C) to suppress a decrease in the ultraviolet absorption intensity of the triazine-based ultraviolet absorber (B). Therefore, the resin composition of the present embodiment can maintain the ultraviolet absorption intensity for a long period of time without using the benzotriazole-based ultraviolet absorber or even if the content of the benzotriazole-based ultraviolet absorber is reduced. Moreover, the triazine-based UV absorber (B) is less likely to yellow than the benzotriazole-based UV absorber. Therefore, the resin composition of the present embodiment can be prevented from yellowing due to contact with water. Therefore, the resin layer 2 has water resistance.

Also, the triazine-based ultraviolet absorber (B) easily absorbs ultraviolet rays in the wavelength band of 290 nm to 380 nm, which are involved in deterioration of organic compounds. Since the triazine-based ultraviolet absorber (B) also absorbs ultraviolet rays exceeding the wavelength band of 340 nm, it can protect the organic compound from ultraviolet rays without the combined use of the benzotriazole-based ultraviolet absorber.

The triazine-based ultraviolet absorber (B) preferably contains a hydroxyphenyltriazine-based ultraviolet absorber. Further, the triazine-based ultraviolet absorber (B) is 2-[4-{(2-hydroxy-3-alkyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl )-1,3,5-tridiane. 2-[4-{(2-hydroxy-3-alkyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-tridian is a hydroxyl group , the cross-linking agent reacts with the hydroxyl group, and bleeding can be suppressed.

In addition, the triazine-based ultraviolet absorber (B) preferably contains a triazine-based ultraviolet absorber having an alkyl group having 12 or 13 carbon atoms, or a triazine-based ultraviolet absorber having an alkyl group having 12 carbon atoms and an alkyl It is also preferred to include a mixture with a triazine-based UV absorber having 13 carbon atoms in the group.

The content of the triazine-based ultraviolet absorber (B) contained in the resin composition forming the resin layer 2 is preferably 10 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the resin (A). When the content of the triazine-based ultraviolet absorber (B) is 10 parts by mass or more, the base protective property of the resin layer 2 can be enhanced. Moreover, when the content of the triazine-based ultraviolet absorber (B) is 20 parts by mass or less, bleeding of the triazine-based ultraviolet absorber (B) can be suppressed.

<Hindered amine light stabilizer (C)>
Two or more hindered amine light stabilizers (C) are used. Two types of hindered amine light stabilizers (C) may be used, or three or more types may be used. The hindered amine light stabilizer (C) comprises an amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and a hindered amine light stabilizer (C2) other than an amino ether type. preferably included.

An amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and a hindered amine light stabilizer (C2) other than an amino ether type are contained in the resin composition constituting the resin layer 2. Therefore, it is thought that these light stabilizers can quickly quench the radical sources involved in the deterioration of resins and UV absorbers. Therefore, the decomposition of the triazine-based UV absorber (B) is suppressed, so that the ultraviolet absorption intensity of the triazine-based UV absorber (B) is maintained, and deterioration of the base due to UV light is thought to be suppressed. Thus, by using two or more types of hindered amine light stabilizers (C), the light stability of the underlayer can be enhanced.

The amino ether type hindered amine light stabilizer (C1) having an NOR structure contains at least bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl) sebacate is preferred. Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)sebacic acid ester is relatively neutral among amino ether-type hindered amine light stabilizers, and therefore resin (A) cross-linking inhibition and yellowing can be suppressed.

The content of the amino ether type hindered amine light stabilizer (C1) having an N—O—R structure is preferably 0.5 parts by mass or more and 6 parts by mass or less with respect to 100 parts by mass of the resin (A). . Degradation of the resin layer 2 and the triazine-based ultraviolet absorber (B) is caused by setting the content of the amino ether type hindered amine light stabilizer (C1) having an N—O—R structure to 0.5 parts by mass or more. is suppressed. Further, by setting the content of the amino ether type hindered amine light stabilizer (C1) having an N—O—R structure to 6 parts by mass or less, the amino ether type hindered amine light stabilizer having an N—O—R structure Bleeding of the light stabilizer (C1) can be suppressed.

Examples of the hindered amine light stabilizer (C2) other than the amino ether type include hindered amine light stabilizers composed of secondary amines and tertiary amines. Hindered amine light stabilizer (C2) other than amino ether type is an ester compound composed of at least 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid. is preferably included. The ester compound is substantially neutral and does not easily react with the proton-dissociating acidic group in the cross-linking agent contained in the resin (A) or the triazine-based ultraviolet absorber (B). Therefore, inhibition of cross-linking and yellowing of the resin (A) can be suppressed.

The content of the hindered amine light stabilizer (C2) other than the amino ether type contained in the resin composition constituting the resin layer 2 is 3 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the resin (A). is preferably 8 parts by mass or more and 30 parts by mass or less. By setting the content of the hindered amine light stabilizer (C2) other than the amino ether type to 3 parts by mass or more, the weather resistance of the resin layer 2 itself can be further improved. Further, by setting the content of the non-aminoether-type hindered amine light stabilizer (C2) to 30 parts by mass or less, the amino ether-type hindered amine light stabilizer (C1) having an N—O—R structure and Bleeding of the hindered amine light stabilizer (C2) other than the amino ether type can be further suppressed.

The total content of the amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and the content of the hindered amine light stabilizer (C2) other than the amino ether type is the resin (A). It is preferably 3.5 parts by mass or more and 36 parts by mass or less, more preferably 8 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass. By setting the content of these components to 3.5 parts by mass or more, not only the weather resistance of the resin layer 2 but also the substrate protection properties can be improved. In addition, by setting the content of these to 36 parts by mass or less, an amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and a hindered amine light stabilizer (C2) other than an amino ether type ) can be suppressed.

Moreover, the resin composition of this embodiment may contain other components as needed. Other components include catalysts, solvents, leveling agents, other light stabilizers, antioxidants, plasticizers, surfactants, colorants, brightening agents, fillers, and the like.

As described above, the resin composition of the present embodiment contains a triazine-based ultraviolet absorber (B) and two or more hindered amine-based light stabilizers (C). By including two or more types of hindered amine light stabilizers (C) in this way, the weather resistance of the resin composition can be enhanced as described above. Moreover, the resin composition of the present embodiment may not contain a benzotriazole-based ultraviolet absorber. Therefore, yellowing due to contact with water can be suppressed. Therefore, the resin composition of the present embodiment and the resin layer 2 made of the resin composition have water resistance and can protect the substrate.

In addition, the resin layer 2 may be transparent or may be colored. The laminate 1 including the resin layer 2 of the present embodiment is suitable, for example, as a film, a sticker, or the like to be attached to the interior or exterior parts of a vehicle or the surface of an object installed outdoors.

EXAMPLES Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these.

(Example 1)
Fluorine resin (trade name: Lumiflon (registered trademark) LF-552, manufactured by Asahi Glass Co., Ltd.) 90.0 parts by mass, acrylic resin (trade name: Nikalite (registered trademark) H4007, manufactured by Nippon Carbide Industry Co., Ltd.) 10.0 mass Part, cross-linking agent (trade name: Coronate HK, manufactured by Tosoh Corporation, polyisocyanate containing isocyanurate of hexamethylene diisocyanate (HMDI)) 20.7 parts by mass, triazine-based UV absorber (trade name: Tinuvin 400, BASF Japan Co., Ltd.) 14.9 parts by mass, an amino ether type hindered amine light stabilizer having an N—O—R structure (trade name: Tinuvin 123, BASF Japan Co., Ltd., bis(1-octyloxy-2, 2,6,6-tetramethyl-4-piperidinyl) sebacate) 4.4 parts by mass, and a hindered amine light stabilizer other than amino ether type (trade name: Tinuvin 249, manufactured by BASF Japan Ltd., 4- A resin composition was prepared by mixing 8.8 parts by mass of an ester compound composed of hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid.

Table 1 shows the blending ratio of the resin composition in parts by mass.

Next, an acrylic film (trade name: Hi-S CalA0800, manufactured by Nippon Carbide Industry Co., Ltd., tensile elongation at break: 150%) was prepared as a substrate. Screen ink KI ink (silver) (manufactured by Teikoku Ink Co., Ltd.) was printed on this substrate using a 180-mesh screen to form a printed layer. Next, the substrate on which the printed layer is formed is dried by heating in a hot air dryer in an environment of 60 ° C. for 60 minutes, left to stand in an environment of 25 ° C. for 24 hours, and a 180 mesh screen is used on the printed layer. Then, screen ink KI ink (yellow) (manufactured by Teikoku Ink Co., Ltd.) was printed to further form a printed layer. Next, the substrate on which these printed layers were formed was dried by heating in a hot air dryer at 60° C. for 60 minutes, and allowed to stand at 25° C. for 24 hours. Thereafter, the resin composition is applied onto the printed layer using a 180-mesh screen so that the thickness after drying is 20 μm, and is dried by heating in an environment of 80° C. for 60 minutes using a hot air dryer. gone. Thereafter, the resin composition was allowed to stand in an environment of 25° C. for 5 hours to form a resin layer made of the resin composition on the printed layer. Thus, a laminate having a substrate layer, a printed layer and a resin layer was obtained.

(Examples 2 to 8 and Comparative Examples 1 to 6)
A laminate was obtained in the same manner as in Example 1, except that the formulation of the resin composition was changed as shown in Tables 1 and 2. As in Table 1, Table 2 shows the blending ratio of the resin composition in parts by mass. In Example 3, Comparative Example 4, and Comparative Example 5, a triazine-based ultraviolet absorber (trade name: Tinuvin 479, manufactured by BASF Japan Ltd.) was used. Further, in Comparative Example 5, a benzotriazole-based ultraviolet absorber (trade name: Tinuvin 109, manufactured by BASF Japan Ltd.) was used, and in Comparative Example 6, a benzotriazole-based ultraviolet absorber (trade name: Tinuvin 928, BASF Japan Co., Ltd.) was used. company) was used.

<Evaluation method>
The laminates according to the above examples and comparative examples were evaluated by the methods described below. Evaluation results are shown in Tables 1 and 2.

(Weather resistance of resin layer)
The laminate is placed in a metal weather tester (manufactured by Daipla Wintes) equipped with a KF-1 filter (295 nm to 780 nm), and light is applied at 75 mW/cm ² in an environment with a black panel temperature of 63 ° C and 50% RH. irradiated. During the light irradiation, the laminate was showered with water for 120 seconds every two hours. After irradiating the laminate with light for 200 hours while watering the laminate in this way, the laminate was taken out from the tester. Then, the gloss value before and after being put into the tester is measured from the resin layer side with a gloss meter UGV-5 manufactured by Suga Test Instruments Co., Ltd., and the difference in the gloss value at a viewing angle of 60 ° before and after being put into the tester. was evaluated according to the following criteria.
S: less than 1 A: 1 or more and less than 3 B: 3 or more and less than 5 C: 5 or more and less than 7 D: 7 or more and less than 10 E: 10 or more

(Weather resistance of laminate)
As in the evaluation of the weather resistance of the resin layer, the laminate was exposed to light while being sprayed with water using a metal weather tester, and the color difference before and after entering the tester was measured using a colorimeter CM-3600d manufactured by Konica Minolta on the resin layer side. The color was measured from the beginning, and the difference in color difference before and after being put into the tester was evaluated according to the same criteria as the evaluation of the weather resistance of the resin layer.

(water resistant)
After the laminate was immersed in warm water of 40° C. for 168 hours, the appearance of the resin layer was visually observed and evaluated according to the following criteria.
A: No change in appearance.
B: Yellowed.

(bleed)
After the laminate was allowed to stand at 23° C. and 50% RH for 168 hours, the appearance of the resin layer was visually observed and evaluated according to the following criteria.
A: No change in appearance.
B: Bleeding or blooming occurred.

As shown in Tables 1 and 2, the resin compositions according to Examples 1 to 8 contain a triazine-based UV absorber and two or more hindered amine-based light stabilizers. The resin compositions according to Examples 1 to 8 have enhanced light stability and excellent weather resistance by containing two or more hindered amine light stabilizers. Moreover, the resin compositions according to Examples 1 to 8 do not contain a benzotriazole-based ultraviolet absorber, and yellowing due to contact with water is suppressed. Therefore, the laminate containing the resin composition according to Examples 1 to 8 and the resin layer made of the resin composition has water resistance and can protect the laminate. On the other hand, in the laminates of Comparative Examples 1 to 6, the resin layer on the surface contained only one type of light stabilizer (HALS), and the weather resistance of the resin layer, the weather resistance of the laminate, water resistance, and bleeding. is insufficient.

As described above, the laminate comprising the resin composition of the present invention and a resin layer comprising the resin composition can achieve both weather resistance and water resistance of the substrate.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, there is provided a resin composition and a laminate that have water resistance and are capable of protecting a substrate, and are expected to be used in fields such as decoration of vehicles such as automobiles. .

DESCRIPTION OF SYMBOLS 1... Laminate 2... Resin layer 3... Base material

Claims (12)

a resin (A);
a triazine-based ultraviolet absorber (B);
two or more hindered amine light stabilizers (C);
including
The two or more hindered amine light stabilizers (C) are an amino ether type hindered amine light stabilizer (C1) having an N—O—R structure and a hindered amine light stabilizer (C2) other than an amino ether type. and, including
The hindered amine light stabilizer (C2) other than the amino ether type is an ester compound comprising 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid. A resin composition comprising: The content of the ester compound composed of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol and 3,5,5-trimethylhexanoic acid per 100 parts by mass of the resin (A) 2. The resin composition according to claim 1, wherein the content is 3 parts by mass or more and 30 parts by mass or less. 2. The amino ether type hindered amine light stabilizer (C1) comprises bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)sebacic acid ester. Or the resin composition according to 2. The content of the bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)sebacic acid ester is 0.5 parts by mass or more with respect to 100 parts by mass of the resin (A)6 4. The resin composition according to claim 3, wherein the content is parts by mass or less. 5. The resin composition according to any one of claims 1 to 4, wherein the triazine-based ultraviolet absorber (B) contains a hydroxyphenyltriazine-based ultraviolet absorber. The hydroxyphenyltriazine-based ultraviolet absorber is 2-[4-{(2-hydroxy-3-alkyloxypropyl)oxy}-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)- 6. The resin composition according to claim 5, comprising 1,3,5-tridian. 7. The resin composition according to claim 6, wherein the triazine-based ultraviolet absorber (B) contains a triazine-based ultraviolet absorber having an alkyl group with 12 or 13 carbon atoms. 8. Any one of claims 1 to 7, wherein the content of the triazine-based ultraviolet absorber (B) is 10 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the resin (A). The resin composition according to . 9. The resin composition according to any one of claims 1 to 8, further comprising a fluororesin. 10. The resin composition according to any one of claims 1 to 9, further comprising a cross-linking agent. 11. The resin composition according to claim 10, wherein the cross-linking agent is an isocyanate-based cross-linking agent. A laminate comprising a substrate and a resin layer composed of the resin composition according to any one of claims 1 to 11 and laminated on the substrate.

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