JPH0924569A - Flexible synthetic resin composite material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the change of properties and the release of a film in a high temperature and high moisture environment by providing an organic thin film having specific storage elastic modulus and thickness at least at the part of the surface of a synthetic resin molding having the specific storage elastic modulus, and providing an inorganic thin film thereon. SOLUTION: An organic thin film having a storage elastic modulus at -20 to 60 deg. of 2000 to 100MPa and a thickness of 20 to 60μm is provided at least on the part of the surface of the molding of synthetic resin having storage elastic modulus at -20 to 60 deg.C of 1000 to 50MPa. An inorganic thin film is provided on the organic thin film to form a plexible synthetic resin composite material. Accordingly, the synthetic resin composite material having the degree of freedoms of the form due to flexibility and no change of properties and release of film under high temperature and high humidity and using outdoor can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft synthetic resin composite, and more particularly, to a synthetic resin reflecting mirror or a synthetic resin decoration which has flexibility and flexibility in terms of shape and is excellent in durability. The present invention relates to a soft synthetic resin composite useful as a product.

[0002]

2. Description of the Related Art Conventionally, synthetic resin reflecting mirrors and synthetic resin ornaments have been subjected to wet processes such as plating on the surface of synthetic resin moldings, vacuum deposition, sputtering, ion plating, etc. It is put into practical use by forming a metal thin film by using the dry process described above and further coating it with a protective paint in order to prevent deterioration and damage of the metal thin film. For example, in the case of ABS resin, the surface is hard chrome plated to be put to practical use as a decorative item such as a mark for vehicles, and in the case of acrylic resin, an aluminum thin film is formed on the sheet surface by vacuum deposition. It is also put to practical use as a synthetic resin mirror lined with protective paint. Recently, there has been a demand for synthetic resin reflectors and synthetic resin ornaments to have a particular degree of freedom in attachment. Synthetic resin reflectors and synthetic resin ornaments that use conventional hard materials are required. In the case of products, there are problems such as lack of flexibility, cracking of the thin film when bent forcibly, and cracking of the molded product, and it is the actual situation that the demands of the market cannot be met.

Therefore, an object of the present invention is to provide a synthetic resin reflector which has flexibility in form and therefore does not undergo alteration or film peeling even under high temperature and high humidity conditions and outdoors. Another object of the present invention is to provide a soft synthetic resin composite useful as a synthetic resin decorative article.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have combined a synthetic resin molded product having a specific flexibility with an organic thin film and provided it on the synthetic resin molded product. The present invention has been completed by finding that the above object can be achieved by further disposing an inorganic thin film on the organic thin film. That is, according to the present invention, the above object is −2.
Storage elastic modulus at 0 to 60 ° C is 1000 to 50 MPa
The storage elastic modulus at −20 to 60 ° C. is 2000 to 1 on at least a part of the surface of the molded product of the synthetic resin in the range of
This is achieved by a soft synthetic resin composite body in which an organic thin film having a thickness of 20 to 60 μm is provided at 00 MPa, and an inorganic thin film is further provided on the organic thin film.

Hereinafter, the present invention will be described in detail. The resin used in the present invention has a storage elastic modulus at −20 to 60 ° C. of 1000 to 50 MPa, preferably 800 to 1
It is necessary that the synthetic resin is in the range of 50 MPa. When the storage elastic modulus of the synthetic resin exceeds 1000 MPa, the composite is inferior in flexibility, whereas when it is less than 50 MPa, the shape retention of the composite is insufficient and deformation tends to occur. is there. In the present invention, the storage elastic modulus means a dynamic viscoelasticity measuring device, preferably a polymer.
Laboratory-manufactured dynamic viscoelasticity measuring device DMTA MKII
Bending mode, frequency 1Hz, heating rate 3 ℃ /
The value obtained under the min measurement condition (hereinafter the same).

The type of synthetic resin is not particularly limited as long as it is within the above storage elastic modulus range. For example, polyether or polyester elastomers, polyester polymers and butadiene-styrene-acrylonitrile copolymers. (Hereinafter sometimes abbreviated as ABS), polyvinyl chloride (hereinafter sometimes abbreviated as PVC), a blend with at least one selected from an acrylic core-shell polymer, polyurethane, polyvinyl chloride and the like. To be Above all, a polyester elastomer, polybutylene terephthalate (hereinafter, referred to as PB) having excellent adhesion to an organic thin film provided on the surface of the molded product of the synthetic resin.
(Abbreviated as T)) and a blend of ABS or an acrylic core-shell polymer are preferable, and the heat generated by blending the PBT-based polymer and the acrylic core-shell polymer is preferable in terms of flexibility, light resistance and hydrolysis resistance. A plastic resin composition is particularly preferably used.

In a preferred embodiment of the above thermoplastic resin composition, for example, (1) when a PBT resin is produced, a vinyl aromatic compound polymer block (A-1) and polybutadiene having a 1,2-bond content of less than 30% are used. At least one block (A) selected from the group consisting of hydrogenated polybutadiene blocks (A-2) in a hydrogenated form, and hydrogenated polyisoprene blocks (B-1)
, Selected from the group consisting of hydrogenated polybutadiene blocks (B-2) and hydrogenated isoprene / butadiene copolymer blocks (B-3) in the form of hydrogenated polybutadiene having 30 to 80% 1,2-bonds. Modified block copolymer consisting of at least one block (B) and having a hydroxyl group at the terminal
(I), and / or a vinyl aromatic compound polymer block (C) and a polyisobutylene block (D), and a modified block copolymer (II) having a hydroxyl group at the terminal,
Theoretical weight of PBT resin and modified block copolymer
The ratio of the total weight of (I) and (II) added is 98/2 to 4
A PBT resin composition obtained by adding to the reaction system at a ratio of 0/60 until the polycondensation reaction of the PBT resin is completed, and (2) mainly by means of an emulsion polymerization method, alkyl acrylate. Ester and / or the following general formula

[0008]

Embedded image CH ₂ ═C (—R) —CH═CH ₂

A monomer system comprising a diene compound represented by the formula (wherein R represents a hydrogen atom or a methyl group) is polymerized, and then the glass transition point of the outer layer portion formed is 5
Containing multi-layer structure copolymer particles having a hard outer layer in a proportion of 75 to 5% by weight, which is obtained by polymerizing radical-polymerizable monomers selected in a combination such that the temperature is 0 ° C. or higher, Moreover, the above PBT resin composition (1) /
The weight ratio of the above-mentioned multilayer structure copolymer particles (2) is from 10/90 to
The thermoplastic resin composition is in the range of 75/25, and particularly preferably, the weight ratio of the PBT resin composition (1) / the multilayer structure copolymer particles (2) is 30/70 to 70.
It is a thermoplastic resin composition within the range of / 30.

The acid component for producing the PBT-based resin may consist of terephthalic acid or its ester-forming derivative, but if necessary, a small amount (usually 20
Other acid components (mol% or less) may be included. Also,
The diol component may consist of 1,4-butanediol only, but if necessary, a small amount (usually 20 mol% or less)
Other diol components may be included. The PBT-based resin may contain a small amount of trifunctional or higher-functional monomer components such as glycerin, trimethylolpropane, pentaerythritol, trimellitic acid, and pyromellitic acid, as long as the characteristics are not adversely affected. As the method for producing the PBT resin composition (1), any method similar to that used in the synthesis of ordinary polyester resins can be adopted except that the modified block copolymer is added.

The modified block copolymers (I) and (I
The hydroxyl group of I) may be located at the terminal of any of the block (A), the block (B), the block (C) and the block (D), but the hard block (A)
Alternatively, it is preferably located at the end of (C). The content of terminal hydroxyl groups in the modified block copolymer is preferably 0.5 or more per molecule on average,
It is preferably in the range of 0.7 to 2. The number average molecular weight of the block (A) in the modified block copolymer (I) or the block (C) in the modified block copolymer (II) is preferably in the range of 4000 to 50,000. Block (B) in united (I)
Alternatively, the number average molecular weight of the block (D) in the modified block copolymer (II) is preferably in the range of 10,000 to 100,000, and further, the modified block copolymer (I) and the modified block copolymer (II) Has a number average molecular weight of 150
It is preferably in the range of 00 to 150,000. The modified block copolymer is more preferably a modified triblock copolymer represented by block (A) -block (B) -block (A) -OH in terms of flexibility.

The elastic body phase forming the inner core of the multilayer structure copolymer particle (2) preferably has a cross-linked molecular chain structure in order to function as an elastic body, and the molecules in the inner core are preferable. The chains and the molecular chains in the outer layer are preferably grafted by chemical bonds. For that purpose, it may be preferable to use a small amount of a polyfunctional polymerizable monomer together in the polymerization of a monomer system comprising an alkyl acrylate and / or a diene compound. When a monomer system containing a diene compound as a main component is used, it itself does not need to use a polyfunctional polymerizable monomer because it functions as a crosslinking or grafting point. Further, the hard outer layer in the multilayer structure polymer (2) is prepared by emulsion polymerization.
In the presence of the polymer functioning as an elastic body obtained as described above, the glass transition point of the outer layer portion formed is 50.
It can be obtained by polymerizing the radical-polymerizable monomers selected in a combination such that the temperature is at least ° C. Examples of the radical-polymerizable monomer used for forming the outer layer include alkyl methacrylate such as methyl methacrylate, aromatic vinyl compound such as styrene, and the like, but methyl methacrylate is used in view of weather resistance. Is most preferred. The average particle size of the multilayer structure copolymer particles (2) used is
From the viewpoint of flexibility, it is preferably in the range of 0.03 to 0.5 μm.

As the synthetic resin molded article used in the present invention,
Films, sheets, and synthetic resins made of the above synthetic resins are used for press molding or injection molding of molded products having various shapes. The surface of these molded products is not only smooth but also has a fine shape for the purpose of decoration. It does not matter even if it has unevenness, unevenness, etc., or has characters etc. engraved or projected.

The organic thin film provided on the synthetic resin molded article has a storage elastic modulus at −20 to 60 ° C. of 2000 to
It is necessary that the organic thin film has a pressure of 100 MPa, preferably 1800 to 200 MPa. Storage elastic modulus is 20
When it exceeds 00 MPa, it is not preferable because the organic thin film is easily cracked when the composite is bent.
If it is less than MPa, cracks may occur in the inorganic thin film or the gloss of the inorganic thin film may disappear in a durability test such as a heat shock test, which is not preferable. The material is not particularly limited as long as it satisfies the storage elastic modulus range, and examples thereof include polyester paints, acrylic urethane paints, and silicon paints. Adhesiveness with the synthetic resin and the inorganic thin film A polyester-based coating composition that is particularly excellent in is preferably used. The thickness of the organic thin film is too small, the effect of suppressing the occurrence of cracks in the inorganic thin film is small, and the coating appearance may not be good, and if it is too thick, the inorganic thin film will have poor flexibility. There is a problem that cracks easily occur and the softness of the synthetic resin molded product cannot be exhibited, and it is necessary that the thickness is 20 to 60 μm, preferably 25 to 45 μm.

The organic thin film may contain additives such as a colorant, an ultraviolet absorber, a light stabilizer and an antioxidant within a range that does not impair the effects of the present invention. As a method for forming an organic thin film, a method of applying the above-mentioned coating material by, for example, spray coating, cast coating, brush coating, dip coating, spin coating, etc., and performing treatments such as drying and curing is usually adopted. The method and conditions for drying and curing the thin film are not particularly limited as long as they are suitable for the coating material to be used, but for example hot air circulation drying, hot air circulation electrothermal infrared irradiation,
Normally 60 due to gas infrared irradiation, high frequency dielectric heating, etc.
The treatment is performed at a temperature of about 130 ° C for about 30 to 120 minutes.

The inorganic thin film provided on the organic thin film provided on the surface of the synthetic resin molded product is not particularly limited as long as it can exhibit a metallic luster, and for example, aluminum, chromium, nickel- Metals such as chromium, titanium, copper, silver, gold, titanium nitride, titanium oxide,
Examples include ceramics such as indium oxide. The thickness of the inorganic thin film is usually about 50 to 1000 angstroms, but is 150 for those having a beautiful metallic luster that can be used as a reflecting mirror or a decorative article and which requires high durability. It is preferably about 400 Å. The method for forming the inorganic thin film includes vacuum vapor deposition, sputtering, ion assisted vapor deposition,
Dry methods such as ion plating and wet plating methods are usually used. Of these methods, sputtering is most preferably used because it has good film thickness accuracy and excellent adhesion. The sputtering conditions for the inorganic thin film are preferably Ar gas pressure of 1 × 1.
Sputtering at 0 ^-1 Pa or less is important for obtaining a durable metal thin film, for example, a chromium thin film.

Further, in the present invention, for the purpose of protecting the inorganic thin film from scratches, deterioration due to moisture, oxygen, etc., and deterioration of adhesion, at least the entire surface of the inorganic thin film, preferably the entire surface of the molded product, is covered with 15 to 15 parts. It is preferable to provide one or more overcoat layers having a thickness of about 30 μm. As the overcoat paint, for example, polyester-based paint, acrylic urethane-based paint, silicon-based paint, alkyd-based paint or the like is used, and further contains fluorine for the purpose of imparting water resistance, oil resistance and the like. A paint such as a polyester-based, acrylic urethane-based, or alkyd-based paint, which is particularly excellent in terms of adhesion to an inorganic thin film, is preferably used.

[0018]

EXAMPLES The present invention will be described in more detail below with reference to examples, but the invention is not limited thereto. The synthetic resins and thin films of Examples and Comparative Examples and the composites were evaluated by the following methods.

(Measurement of Storage Elastic Modulus) Synthetic resin molded product: A test piece was cut out from a molded flat plate having a thickness of about 3 mm to have a cross section of about 3 mm × 1.5 mm, and a dynamic viscoelasticity measuring device (Polymer Laboratory Co., Ltd.) was used. DMTA
MKII). The measurement conditions are a bending mode, a frequency of 1 Hz, and a heating rate of 3 ° C./min. Organic thin film: The coating material was dried and cured in a petri dish to a thickness of about 1 mm, and a test piece having a cross section of about 1 mm x 3.5 mm was cut out and measured with the same apparatus and conditions as above.

(Measurement of film thickness) Organic thin film: The cross section was enlarged and measured with an optical microscope. Inorganic thin film: measured by multiple interference method.

(General Durability Evaluation) 1. Weather resistance test Using a sunshine carbon arc weatherometer (manufactured by Suga Test Instruments Co., Ltd.), exposed at a black panel temperature of 63 ° C. for 1000 hours from the surface side provided with the inorganic thin film having the metallic luster of the soft synthetic resin composite. After that, the appearance was visually observed and observed with an optical microscope at × 200 magnification, and the adhesion of the thin film was evaluated by a cross-cut cellophane tape peeling test based on JIS K5400. 2. Water resistance test After standing in warm water at 45 ° C for 200 hours, the same evaluation as the weather resistance test was performed. 3. Heat resistance test The same evaluation as in the weather resistance test was performed after leaving the sample in an air thermostat at 70 ° C. for 100 hours. 4. Cold / humidity test-Leave in a -30 ° C atmosphere for 23 hours, then in a room for 1 hour, then in 50 ° C warm water for 23 hours, then again in a room for 1 hour, and then in an 80 ° C air bath. 3 tests of leaving for 1 hour and then for 1 hour in the room
Carry out a cycle. After that, the same evaluation as the weather resistance test was performed.

(Flexibility Test) The soft synthetic resin composites were manually added to wooden molds having various radii of curvature, and the appearance was visually observed.

Example 1 (Production of Polyester Resin Composition) 74.8 parts by weight of dimethyl terephthalate, 41.7 parts by weight of 1,4-butanediol, and 0.03 parts by weight of tetraisopropyl titanate were charged into a reaction vessel (theoretical amount of PBT produced). : 85 parts by weight), 170 under normal pressure
The transesterification reaction was carried out by heating while gradually raising the temperature from ℃ to 230 ℃, and the transesterification reaction was stopped when 23.8 parts by weight of methanol was distilled. Then, SEEPS-OH which is a modified block copolymer [having a hydroxyl group at one polystyrene block end, a polystyrene block (number average molecular weight: 6000) / 1,3-butadiene hydrogenated product of isoprene copolymer] Block (number average molecular weight: 28000) / polystyrene block (number average molecular weight: 6000) triblock (hydroxyl group content: 0.8 / molecule; styrene unit content based on the block copolymer before hydrogenation: 30% by weight; The molar ratio of isoprene unit / 1,3-butadiene unit: 1/1; 1,4-butadiene content in 1,3-butadiene in the copolymer block of 1,3-butadiene and isoprene before hydrogenation: 95 %, 3,4-bond amount: 5%; Hydrogenation product of 1,3-butadiene-isoprene copolymer Unsaturation based on block: 5%; number average molecular weight: 40,000] Then, the system is depressurized and transferred to the polycondensation reaction system. That is, the reaction temperature was raised from 230 ° C. to 250 ° C. and the pressure was reduced from atmospheric pressure to 0.2 mmHg over about 30 minutes under the reaction temperature and pressure. The polycondensation reaction was carried out for 60 minutes, and then the polycondensation reaction was stopped by supplying nitrogen gas to the reaction tank to return the system to normal pressure, and the polyester resin composition [A-1] Got

(Production of Multilayer Copolymer Particles) Under a nitrogen atmosphere, 600 parts by weight of distilled water, 0.168 parts by weight of sodium lauryl sarcosinate as an emulsifier and stearin were placed in a polymerization vessel equipped with a stirrer, a cooling pipe and a dropping funnel. Add 2.1 parts by weight of sodium acidate, heat to 70 ° C to dissolve evenly, and then add butyl acrylate 150 at the same temperature.
By weight, 0.15 part by weight of allyl methacrylate as a polyfunctional polymerizable monomer was added, and after stirring for 30 minutes, 0.15 part by weight of potassium peroxodisulfate was added to initiate polymerization.
After 4 hours, it was confirmed by gas chromatography that all the respective monomers were consumed. Next, 0.3 parts by weight of potassium peroxodisulfate was added to the obtained copolymer, and then a mixture of 48 parts by weight of methyl methacrylate and 2.0 parts by weight of ethyl acrylate was added dropwise from the dropping funnel over 2 hours.
After the dropping was completed, the reaction was continued at 70 ° C. for another 30 minutes, and it was confirmed that each monomer was consumed, and then the polymerization was terminated. The particle size of the obtained latex was 0.23 μm. -20
After cooling to ℃ for 24 hours to aggregate, take out the aggregate,
It was washed 3 times with hot water at 80 ° C. Further, it was dried under reduced pressure at 80 ° C. for 2 days to obtain multi-layer structure copolymer particles [B-1]. The glass transition point (Tg) of the outer layer portion of the obtained multilayer structure copolymer particles was 105 ° C.

(Production of Synthetic Resin) The polyester resin composition [A-1] and the multi-layer structure copolymer particles [B-1] obtained as described above were mixed at a ratio of 60/40 (weight ratio). Were pre-mixed with a 30 mmφ vented extruder (BT-30 manufactured by Plastics Engineering Laboratory Co., Ltd.), melt-kneaded at a temperature of 250 ° C., and pelletized. After vacuum-drying the obtained pellets of the thermoplastic resin composition, an injection molding machine (manufactured by Toshiba Kikai)
Injection molding according to IS80) was performed to obtain a flat plate molded product having a thickness of 3 mm. The obtained molded product had a storage elastic modulus in the range of −20 to 60 ° C. of 700 to 230 MPa and was flexible. Then, on the entire surface of one side of this molded product,
A two-liquid type thermosetting paint consisting of a prepolymer having an aromatic ring and an ester group, an isocyanate and a prepolymer having an ester group, diluted with thinner was used to form a coating film by spray painting, and then in a hot air drying oven. An organic thin film was provided by drying and curing at 115 ° C. for 90 minutes. When the reaction rate was confirmed by DSC, it was confirmed that the curing reaction had proceeded sufficiently. The storage elastic modulus of this organic thin film in the range of −20 to 60 ° C. was 1800 to 500 MPa, and the film thickness was 35 to 45 μm. Next, chromium (purity 99.9%) was deposited on almost the entire surface of the organic thin film by a sputtering method. The film thickness was 200 to 230 angstrom. The sputtering equipment and conditions are shown below. Sputtering device: High frequency magnetron sputtering device CFS-4ES manufactured by Tokuda Manufacturing Co., Ltd. Ultimate pressure: 1.5 × 10 ⁻³ Pa Ar gas introduction pressure: 1 × 10 ⁻¹ Pa deposition rate: 2.3 to 2.7 A / sec.

The synthetic resin composite prepared by the above method had a chrome metallic luster and had a very good appearance. In the bending test, no abnormality was found even when the bending radius was 60 mmR, and the flexibility was excellent. Moreover, the appearance and adhesion were good without any abnormalities. No abnormality was found in the durability test.

Example 2 A synthetic resin prepared in the same manner as in Example 1 except that Paraloid EXL2311, manufactured by Kureha Chemical Industry Co., Ltd. was used as the multi-layer structure copolymer particles, had a storage elasticity in the range of -20 to 60 ° C. The rate was 650-200 MPa. Using this synthetic resin, a synthetic resin composite was prepared in the same manner as in Example 1. As a result, it had a chrome metallic luster and had a very good appearance. Curvature radius 60mmR in bending test
No abnormalities are seen even when bent up to
The adhesion was also good with no abnormality. No abnormality was found in the durability test.

Example 3 The same as Example 2 except that the mixing ratio of the polyester resin composition [A-1] and the multilayer structure copolymer particles [B-1] was 50/50 (weight ratio). The storage elastic modulus of the obtained synthetic resin in the range of −20 to 60 ° C. is 470 to
It was 120 MPa. Example 1 using this synthetic resin
When a synthetic resin composite was prepared by the same method as described above, it had a chrome metallic luster and had a very good appearance. In the bending test, no abnormality was found even after bending to a radius of curvature of 60 mmR, flexibility was excellent, and appearance and adhesion were also good with no abnormality. No abnormality was found in the durability test.

Example 4 A prepolymer having an aromatic ring, an ester group and a fluoroalkyl group and an isocyanate were formed so as to cover the entire surface of the chromium thin film of the soft synthetic resin composite having a metallic luster obtained in Example 1. After forming a coating film by spray coating using a two-liquid mixing type thermosetting paint consisting of a prepolymer having an ester group and a thinner, it is dried and cured at 75 ° C for 60 minutes in a hot air drying oven, A colorless and transparent thin film having a film thickness of 20 μm was provided. The obtained composite had a chrome metallic luster and had a very good appearance. In the bending test, no abnormality was found even after bending to a radius of curvature of 60 mmR, flexibility was excellent, and appearance and adhesion were also good with no abnormality. No abnormality was found in the durability test.

Example 5 As a synthetic resin, a polyester elastomer (Perprene S3001 manufactured by Toyobo Co., Ltd.) having a storage elastic modulus at −20 to 60 ° C. of 900 to 135 MPa was used, and a flat plate (80 mm × 80 mm × 3 mmt) was formed by injection molding. Was produced. Next, in the same manner as in Example 1, a synthetic resin composite having metallic luster was produced. The obtained composite had a chrome metallic luster and had a very good appearance. In the bending test, no abnormality was found even after bending to a radius of curvature of 60 mmR, flexibility was excellent, and appearance and adhesion were also good with no abnormality. No abnormality was found in the durability test.

Comparative Example 1 As a synthetic resin, an ABS resin having a storage elastic modulus at −20 to 60 ° C. of 2050 to 1700 MPa (Psycolac T grade manufactured by Ube Saikon Co., Ltd.) was used, and a flat plate (80 mm × 80 mm ×) was formed by injection molding. 3 mmt) was molded. Then, a synthetic resin composite having metallic luster was prepared in the same manner as in Example 1. The appearance of the obtained composite was good, and there was no problem in adhesion and durability, but it was hard and not flexible.

Comparative Example 2 The synthetic resin used in Example 2 was used, and the thickness of the organic thin film was adjusted to 1
A synthetic resin composite was produced in the same manner as in Example 1 except that the thickness was 5 μm. The appearance of the obtained composite was good, but cracks occurred in the chromium film in the durability test.

Comparative Example 3 Using the synthetic resin used in Example 2, the thickness of the organic thin film was adjusted to 8
A synthetic resin composite was produced in the same manner as in Example 1 except that the thickness was 0 μm. The obtained composite had a good appearance, but was inferior in flexibility and cracked in the thin film in the 90 mmR bending test.

[0034]

According to the present invention, at least a part of the surface of a molded article of synthetic resin having a storage elastic modulus at -20 to 60 ° C in the range of 1000 to 50 MPa is -20 to 60 ° C.
Has a storage elastic modulus of 2000 to 100 MPa, a thickness of 20 to 60 μm, and an inorganic thin film formed on the organic thin film. A flexible synthetic resin composite that has flexibility in its shape and is useful as a synthetic resin reflector or synthetic resin ornament that does not deteriorate or peel off even under high temperature and high humidity conditions even when used outdoors. You can get the body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaki Ishii 41 Miyukigaoka, Tsukuba City, Ibaraki Prefecture Kuraray Co., Ltd.

Claims (1)

[Claims] 1. A storage elastic modulus at -20 to 60 ° C. is 1.
The storage elastic modulus at −20 to 60 ° C. is 2000 to 100 MPa and the thickness is 20 to 60 μm on at least a part of the surface of the molded product of the synthetic resin in the range of 000 to 50 MPa.
2. A soft synthetic resin composite body, comprising: an organic thin film, and an inorganic thin film provided on the organic thin film.