JP2013018200A - Laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate capable of suppressing rise in temperature without impairing beautiful appearance.SOLUTION: This laminate is obtained by laminating a colored layer on a base layer. The colored layer includes a synthetic resin, a colorant, and transparent glass powder having an average particle size less than 1 μm.

Description

  The present invention relates to a laminate excellent in aesthetics and heat shielding properties.

From the viewpoint of landscape, aesthetics are required for building materials used for building exteriors and the like. In recent years, as a building material, for example, an image of natural stone has been attracting attention, and a material having a relatively thick thickness and being given a heavy feeling by various uneven patterns has been adopted.
On the other hand, in recent years, in urban areas, a climate unique to urban areas has been created by artificial radiant heat discharged from concrete buildings and cooling. In particular, the outdoor temperature rise in urban areas in summer is significant, causing a problem called the heat island phenomenon. For such problems, various materials have been proposed in order to suppress the temperature rise of the building exterior surface.

  Under such a background, for example, Patent Documents 1 and 2 disclose glass powder and the like as transparent heat-shielding pigments, and these transparent heat-shielding pigments are added to materials such as building exteriors. It has been suggested that a material excellent in heat shielding properties can be obtained while maintaining the design properties.

JP 2009-262378 A JP 2000-288466 A

  However, glass powder usually has a particle size of submillimeter to millimeter order, and when such a large particle size glass powder is used, it is possible to maintain a certain degree of aesthetics and heat insulation, but satisfactory performance. May not be obtained. In addition, there is a possibility that the aesthetics of the building exterior may be impaired and it is difficult to suppress the temperature rise.

  This invention is made | formed in view of such a problem, and it aims at obtaining the laminated body which can suppress a temperature rise, without impairing aesthetics.

  As a result of intensive studies to achieve the above object, the present inventors have found that by using nano-level glass powder, it is possible to suppress an increase in temperature without impairing the original design of the material. It came to complete.

That is, the laminate of the present invention has the following characteristics.
1. A laminate in which a colored layer is laminated on a base layer,
A laminate in which the colored layer contains a synthetic resin, a coloring material, and a transparent glass powder having an average particle diameter of less than 1 μm.
2. 1. The average particle size of the transparent glass powder is 160 nm or more and 900 nm or less. The laminated body as described in.
3. 1. The surface of the transparent glass powder is coated with a silane coupling agent. Or 2. The laminated body as described in.
4). The colored layer contains 5 to 3000 parts by weight of a colorant and 10 to 200 parts by weight of a transparent glass powder with respect to 100 parts by weight of the solid content of the synthetic resin. To 3. The laminated body in any one of.
5. The colored layer further contains hollow particles and / or porous particles. To 4. The laminated body in any one of.

  The laminated body of this invention can suppress a temperature rise, without impairing aesthetics.

  Hereinafter, modes for carrying out the present invention will be described.

(Colored layer)
The colored layer of the present invention is a layer that imparts design properties to the laminate.
As a colored layer, a synthetic resin, a coloring material, and a transparent glass powder having an average particle diameter of less than 1 μm are included.

  Examples of synthetic resins include acrylic resins, silicone resins, acrylic silicone resins, fluororesins, vinyl acetate resins, acrylic / vinyl acetate resins, vinyl chloride resins, urethane resins, acrylic urethane resins, epoxy resins, alkyd resins, and polyvinyl alcohol resins. , Polyester resin, ethylene resin, polyvinyl alcohol, cellulose and derivatives thereof. Examples of the synthetic resin include water-dispersed, water-soluble, non-water-dispersed, solvent-soluble, and solvent-free types, which may be either one-component type or two-component type. Good.

  The glass transition temperature of the synthetic resin is preferably −60 ° C. to 60 ° C., more preferably −40 ° C. to 40 ° C., and further preferably −30 ° C. to 30 ° C. When the glass transition temperature of the synthetic resin is within such a range, it is possible to impart moderate flexibility. The glass transition temperature is a value determined by the Fox formula.

Examples of the colorant include pigments, aggregates, and the like, and a laminate having excellent design properties can be obtained using one or more of these.
Examples of pigments include phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green, azo pigments such as monoazo red, first yellow, permanent yellow, and disazo yellow, perylene pigments such as perylene red, quinacridone pigments such as quinacridone red, isoindo Organic pigments such as linone pigments, methine / azomethine pigments, benzimidazolone pigments, dioxazine pigments; titanium oxide, barium sulfate, zinc oxide, calcium carbonate, silicon oxide, iron oxide, magnesium oxide, zirconium oxide, yttrium oxide , Metal oxides such as indium oxide, other inorganic pigments such as molybdenum red, cobalt blue, manganese violet, bitumen, ultramarine blue; metal powder pigments such as aluminum, nickel, stainless steel; pearl pigment, fluorescent Fee, special pigments such phosphorescent pigment, and the like.
As the aggregate, any of natural products and artificial products can be used. For example, mica, kaolin, clay, porcelain clay, china clay, talc, aluminum hydroxide, magnesium hydroxide, calcium carbonate, shells, barite powder, Marble, granite, serpentine, granite, fluorite, cryolite, feldspar, quartzite, silica sand, etc., ceramic pulverized products, ceramic pulverized products, glass beads, glass pulverized products, metals, etc. The surface may be coated with the pigment or the like.
The size of the colorant is not particularly limited, but the pigment is about 100 nm to less than 1 μm, and the aggregate is about 1 μm to 3 mm.

  The mixing ratio of the synthetic resin and the coloring material in the colored layer is preferably 5 parts by weight or more and 3000 parts by weight or less, more preferably 20 parts by weight or more and 2000 parts by weight or less with respect to 100 parts by weight of the synthetic resin in terms of solid content. More preferably, it is 30 parts by weight or more and 1500 parts by weight or less.

  The colored layer imparts design properties with a colorant, and not only its hue, but, for example, when using an aggregate, a three-dimensional design having an uneven shape with an aggregate is applied, or various coating instruments are used. It can also be used to give a three-dimensional design having an uneven shape. For example, surface shapes with irregular shapes such as Yuzu skin pattern, ripple pattern, stucco pattern, sand wall pattern, stone pattern, rock texture pattern, sandstone pattern, blown pattern, lunar pattern, comb-drawn pattern, insect-eating pattern, etc. Three-dimensional designs.

Moreover, in this invention, although heat-shielding property can be provided irrespective of the kind of coloring material, heat-shielding property can be improved more by using the coloring material which has heat-insulating property.
Examples of the colorant having heat insulation include, for example, metal oxides such as titanium oxide, zinc oxide and iron oxide, heat insulation pigments such as metal powder pigments such as aluminum, nickel and stainless steel, or heat insulation pigments on the surface of the aggregate. And the like coated with.

The transparent glass powder having an average particle diameter of less than 1 μm is a material having transparency and heat shielding properties.
The transparent glass powder has the effect of reflecting solar heat while having transparency, but when a normal transparent glass powder of 1 μm or more is used, the shape of the transparent glass powder is visually recognized or partially In some cases, fluctuations and noises occur and the design of the colored layer is impaired.
In the present invention, the transparent glass powder is made into small particles of less than 1 μm and nano-level so that the shape of the transparent glass powder is not visually recognized, the occurrence of fluctuations and noise is suppressed, and the design of the colored layer is improved. It is possible to maintain the designability for a long time without damaging it. Moreover, the heat-shielding improvement is also seen by making a particle diameter into a nano level.
The average particle diameter of the transparent glass powder is not particularly limited as long as it is less than 1 μm, but is preferably 180 nm to 900 nm, more preferably 190 nm to 500 nm, still more preferably 200 nm to 400 nm, and most preferably 205 nm to 350 nm. It is.
The average particle size of the transparent glass powder can be measured by a dynamic light scattering method or the like.

Examples of the material of the transparent glass powder include soda lime glass, soda potash glass, quartz glass, phosphosilicate glass, fluoride glass, lead glass, lanthanum glass, barium glass, borosilicate glass, and aluminosilicate glass.
Moreover, the refractive index of glass will not be specifically limited if it is 1.4 or more and 2.0 or less.
A technique for obtaining a transparent glass powder having an average particle diameter of less than 1 μm is not particularly limited, but it can be obtained by pulverizing a transparent glass powder having an average particle diameter of 1 μm or more and other glass products. Such a glass pulverized product is preferably used for the transparent glass powder having an average particle diameter of less than 1 μm of the present invention. Further, as the transparent glass powder, those colored with metal or the like can be used.

The transparent glass powder having an average particle diameter of less than 1 μm is preferably one whose surface is coated with a silane coupling agent.
By covering with a silane coupling agent, the affinity between the synthetic resin and the transparent glass powder can be improved, and more excellent transparency can be imparted, while the strength of the colored layer and the adhesion to the base layer There is also an effect of improving physical properties such as.

Examples of the silane coupling agent include β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropylethoxysilane, and γ-glycid. Xypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylsilane, N-β ( Aminoethyl) γ-aminopropylmethyldimethoxysilane, N-β (aminoethyl) γ-aminopropylmethyltrimethoxysilane, isocyanate functional silane, γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropylmethyldi Ethoxy , Γ-methacryloxypropyltriethoxysilane, γ-acryloxytrimethoxysilane, p-styryltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, N- [2- (vinylbenzylamino) ethyl] -3-amino Propyltrimethoxysilane and the like, and one or more of these can be used.
The ratio of the transparent glass powder and the silane coupling agent is preferably 0.1 parts by weight or more and 3.0 parts by weight or less based on 100 parts by weight of the transparent glass powder in terms of solid content.

The mixing ratio of the synthetic resin and the transparent glass powder is preferably 10 parts by weight or more and 200 parts by weight or less, more preferably 20 parts by weight or more and 180 parts by weight or less, with respect to 100 parts by weight of the solid content of the synthetic resin. More preferably, it is 30 to 150 weight part.
By being such a ratio, the outstanding heat-shielding property can be acquired, without impairing the design property of a colored layer.
If there is too much synthetic resin, heat shielding properties may be inferior. When there are too many transparent glass powders, there exists a possibility that the designability of a colored layer may be impaired.

In the colored layer, in addition to the above components, hollow particles and / or porous particles may be contained. When the colored layer contains hollow particles and / or porous particles, it is effective for improving the heat insulating properties of the colored layer. Further, the stress in the colored layer is relieved, cracking and the like can be prevented, and the colored layer can be maintained stably over a long period of time.
The mixing ratio of the hollow particles and / or the porous particles is preferably 10 to 300 parts by volume, more preferably 30 to 30 parts by volume in terms of solid content, with respect to 100 parts by volume of the colorant, in total of the hollow particles and / or porous particles. 200 capacity parts.

  Examples of the hollow particles include hollow ceramic particles and hollow resin particles. Examples of the ceramic component constituting the hollow ceramic particles include sodium silicate glass, aluminum silicate glass, borosilicate sodium glass, fly ash, alumina, shirasu, obsidian and the like. Examples of the resin component constituting the hollow resin particles include acrylic resin, styrene resin, acrylic-styrene copolymer resin, acrylic-acrylonitrile copolymer resin, acrylic-styrene-acrylonitrile copolymer resin, acrylonitrile-methacrylonitrile copolymer resin, Examples thereof include acrylic-acrylonitrile-methacrylonitrile copolymer resins and vinylidene chloride-acrylonitrile copolymer resins. The hollow particles are obtained by foaming these components by a known method. Such hollow particles only have to be in a foamed state in the final laminate, and can also be foamed in the course of manufacturing the laminate.

The average particle diameter of the hollow particles is preferably 0.1 to 200 μm (more preferably 1 to 150 μm). The density of the hollow particles is preferably 0.01 to 1 g / cm ³ , more preferably 0.01 to 0.8 g / cm ³ . As long as the hollow particles satisfy the above range, the shape thereof is not limited, but in the present invention, those having a true spherical shape are particularly preferable.

Examples of porous particles include marlite, boehmite, silica gel, zeolite, alumina, allophane, diatomaceous earth, siliceous shale, sepiolite, attapulgite, montmorillonite, zonolite, imogolite, vermiculite, perlite, Oya stone powder, activated clay, charcoal, activated carbon Wood powder, shirasu balloon, ferrite balloon, porous synthetic resin particles and the like. The average particle diameter of the porous particles is preferably 1 μm to 3 mm, more preferably 5 μm to 2 mm. The density of the porous particles is preferably 0.01 to 1 g / cm ³ , more preferably 0.01 to 0.8 g / cm ³ .

In the colored layer, a light stabilizer can be used in addition to the above components. By including such a light stabilizer, the designability and excellent adhesion of the colored layer can be maintained over a long period of time, and the effects of the present invention can be sufficiently exhibited.
Examples of such light stabilizers include hindered amine light stabilizers. Specifically, for example, bis (2,2,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octoxy- 2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2) 2- (3,5-di-tert-butyl-4-hydroxybenzyl) -2-n-butylmalonate , 6,6-pentamethyl-4-piperidyl), tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, tetrakis (1,2,2) , 6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate and the like.
The mixing ratio of the light stabilizer is preferably 0.01 to 10 parts by weight, more preferably 0.05 to 5 parts by weight, and still more preferably 0 to 100 parts by weight of the colorant in terms of solid content. 0.1 to 3 parts by weight.

  Moreover, unless the effect of this invention is impaired remarkably, a colored layer can contain another component as needed. Examples of such components include plasticizers, algae inhibitors, antibacterial agents, deodorants, adsorbents, flame retardants, extender pigments, fibers, ultraviolet absorbers, antioxidants, catalysts, and the like.

As a base layer in this invention, what consists of fibrous materials, such as a woven fabric, a nonwoven fabric, a mesh, a cloth | cross, for example, is preferable, and when a laminated body is constructed to a building exterior surface, a laminated body is stabilized Has a supporting effect. The fibrous material has a thickness of 0.05 to 1.5 mm (more preferably 0.1 to 1.2 mm, more preferably 0.2 to 1.0 mm), and a basis weight of 5 to 300 g / m ² (more preferably 10 to 250 g / m ² , and more preferably 20 to 200 g / m ² ).

The laminate of the present invention can be suitably applied mainly to building exterior surfaces.
For example, the method etc. which stick the laminated body which consists of a colored layer / base layer produced beforehand to the building exterior surface etc. are mentioned. The building exterior surface may be an existing building exterior wall or a base material used for building exterior.
Examples of the base material for building exterior include concrete, mortar, fiber-mixed cement board, cement calcium silicate board, slag cement pearlite board, gypsum board, tile, ALC board, siding board, extrusion board, and steel sheet. , Plastic boards, wood boards and the like, and these substrates may be subjected to some surface treatment.

The method for producing a laminate comprising a colored layer / base layer in advance is not particularly limited, and a component for forming the colored layer (hereinafter referred to as “colored layer composition”) is applied on the base layer. Examples thereof include a method or a method of laminating a colored layer prepared in advance on a base layer.
In such a method, for example, a known applicator such as spray, roller, scissors, brush, spatula, reciprocator, coater, pouring and the like can be used. The three-dimensional pattern of the colored layer can be applied by using a tool such as a design roller, a kite, a brush, a comb, a spatula, a stamp, an emboss, or a formwork or the like to which a three-dimensional pattern has been added in advance. Alternatively, after forming the colored layer, a part of the colored layer can be scraped off and applied.

  The thickness of the colored layer may be appropriately set according to the purpose, but is preferably 0.05 mm to 10 mm, more preferably 0.1 mm to 8 mm.

What is necessary is just to stick the manufactured laminated body to a building exterior surface using an adhesive agent, an adhesive, an adhesive tape, a nail, a collar, etc. In addition, it can also be fixed using pins, fasteners, rails or the like.
Moreover, when sticking a laminated body with an adhesive agent, adjacent laminated bodies can be stuck and stuck, or a laminated body can be stuck at a predetermined | prescribed space | interval and a joint can be provided. In this invention, a joint part can be easily formed by sticking a laminated body so that an adhesive agent may be exposed between laminated bodies. In this case, the interval (joint width) for adhering the laminate is preferably about 1 to 30 mm. Within such a range, a decorative finish utilizing the joint pattern can be obtained. The adhesive at the joint may be smoothed with a spatula or the like as necessary. In addition, although the atmospheric temperature at the time of hardening an adhesive agent can be set suitably, it may be normal temperature normally.
Moreover, a protective layer can also be laminated | stacked on the laminated body of this invention to such an extent that the effect of this invention is not impaired.

  Experimental examples are shown below to clarify the features of the present invention.

(Experimental example 1)
With the formulation shown in Table 1, a colored layer composition is prepared, and the colored layer composition A is 2 mm in dry thickness on a glass nonwoven fabric (thickness 0.4 mm, basis weight 50 g / m ² ). Thus, it was applied with a coater and dried at 60 ° C. for 60 minutes to obtain a laminate, and the following test was performed.

(Thermal insulation test)
The laminate obtained by the above method was used as a test body, and the test body was irradiated with a 250 W infrared lamp from a distance of 30 cm, and the back surface temperature of the test body when the temperature rise reached equilibrium was measured. The rise inhibitory property was evaluated. The evaluation was “A” when the temperature was less than 55.0 ° C., “A ′” when the temperature was 55.0 ° C. or more and less than 55.5 ° C., and 55.5 ° C. or more and less than 56.0 ° C. What was present was “B”, what was 56.0 ° C. or more and less than 56.5 ° C. was “B ′”, what was 56.5 ° C. or more and less than 57.0 ° C. was “C”, 57.0 ° C. "C '" when the temperature was 5 ° C or higher and lower than 57.5 ° C, "D" when the temperature was 57.5 ° C or higher and lower than 58.0 ° C, and "D'" if the temperature was 58.0 ° C or higher. It was. The evaluation is shown in Table 1.

(Design test)
The laminate obtained by the above-mentioned method was used as a test body, and the surface of the test body was visually confirmed to evaluate the design properties. The evaluation was performed in four stages (excellent A>B>C> D inferior), in which “A” indicates an excellent aesthetic appearance and “D” indicates an inferior aesthetic appearance. The evaluation is shown in Table 1.

The details of each raw material are as follows.
Synthetic resin A: acrylic resin emulsion, solid content 50% by weight, glass transition temperature 0 ° C.
Synthetic resin B: acrylic silicon resin emulsion, solid content 50% by weight, glass transition temperature 0 ° C.
Coloring material A: colored silica sand (average particle size 120 μm, pale yellow)
Colorant B: heavy calcium carbonate (average particle size 80 μm, white)
Colorant C: Silica (average particle size 150 μm, light brown)
Colorant D: Titanium oxide powder (average particle size 250 nm, white)
Transparent glass powder A: ground glass powder (soda lime glass, average particle size 250 nm)
Transparent glass powder B: ground glass powder (soda lime glass, average particle size 250 nm) surface-treated with γ-methacryloxypropyltrimethoxysilane (ground glass powder: γ-methacryloxypropyltrimethoxysilane = 100: 1 (weight ratio)
Transparent glass powder C: ground glass powder (soda lime glass, average particle size 210 nm) surface-treated with γ-methacryloxypropyltrimethoxysilane (ground glass powder: γ-methacryloxypropyltrimethoxysilane = 100: 1 (weight ratio)
Transparent glass powder D: ground glass powder (soda lime glass, average particle size 400 nm) surface-treated with γ-glycidoxypropyltrimethoxysilane (ground glass powder: γ-glycidoxypropyltrimethoxysilane = 100: 1 (weight ratio))
-Transparent glass powder E: ground glass powder (soda lime glass, average particle size 1 μm)
-Transparent glass powder F: Glass particles (soda-lime glass, average particle size 60 μm)
・ External pigment: Kaolin particles (average particle size 250 nm)
Hollow particles: Hollow resin beads made of acrylonitrile (average particle size 40 μm, density 0.03 g / cm ³ )
・ Additives: Dispersant, film-forming aid, viscosity modifier, antifoaming agent (method for adjusting crushed glass powder)
The pulverized glass powder was prepared by wet pulverizing soda lime glass particles (transparent glass powder F) having an average particle diameter of 60 μm using a planetary ball mill.
Moreover, the raw material which surface-treated the ground glass powder with the silane coupling agent mixed 100 parts by weight of isopropyl alcohol and 1 part by weight of the silane coupling agent with 100 parts by weight of the ground glass powder, and stirred at 50 ° C. for 2 hours. And dried at 70 ° C. for 24 hours.

(Experimental Examples 2 to 16)
Except having replaced with the composition for colored layers shown in Table 1, the test body was produced by the method similar to Test Example 1, and the test similar to Test Example 1 was done. The results are shown in Table 1.

Claims (5)

A laminate in which a colored layer is laminated on a base layer,
A laminate in which the colored layer contains a synthetic resin, a coloring material, and a transparent glass powder having an average particle diameter of less than 1 μm.   The average particle diameter of transparent glass powder is 160 nm or more and 900 nm or less, The laminated body of Claim 1 characterized by the above-mentioned.   The laminate according to claim 1 or 2, wherein the surface of the transparent glass powder is coated with a silane coupling agent.   The colored layer contains 5 parts by weight or more and 3000 parts by weight or less of a coloring material and 10 parts by weight or more and 200 parts by weight or less of a transparent glass powder with respect to 100 parts by weight of the solid content of the synthetic resin. The laminated body in any one of Claim 3. The laminate according to any one of claims 1 to 4, wherein the colored layer further contains hollow particles and / or porous particles.