WO2001042158A1

WO2001042158A1 - Dispersion composition of fine inorganic particles, composition for interlayer for laminated glass, interlayer, and laminated glass

Info

Publication number: WO2001042158A1
Application number: PCT/JP2000/008819
Authority: WO
Inventors: Yoshimi Kawamoto; Fuminori Osako; Hitoshi Okada; Kuniko Nagai
Original assignee: Asahi Glass Company, Limited; Fuji Titanium Industry Co., Ltd.
Priority date: 1999-12-13
Filing date: 2000-12-13
Publication date: 2001-06-14

Abstract

A dispersion composition which comprises 100 parts by weight of fine inorganic particles, 1 to 50 parts by weight of a hydroxylated fatty acid ester, and a plasticizer. When the composition is incorporated into various molding resins, resin moldings which have excellent transparency and in which the fine inorganic particles are evenly dispersed are obtained because the fine inorganic particles are evenly dispersed in the composition. Also provided are: a composition for forming a low-haze interlayer for laminated glasses for vehicles; an interlayer for laminated glasses, and a laminated glass.

Description

Specification

Inorganic fine particle dispersion composition, composition for interlayer film of laminated glass, interlayer film and laminated glass

The present invention relates to a fine particle dispersion composition containing inorganic fine particles, a composition for a laminated glass interlayer film containing the liquid composition, an interlayer film for a laminated glass, and a laminated glass. Background art

By applying various types of fine particles to a substrate by coating or inking, etc. to form a film, or by dispersing various types of fine particles in various molded products such as films and sheets, the unique properties of the fine particles Utilizing, products that perform various useful functions have been developed. For example, tin-containing indium oxide (hereinafter referred to as “IT0”) is used for window glass for vehicles, heat-reflective coatings for architectural glass, transparent electrodes such as solar cells and liquid crystal displays, electoluminescence displays and sunset panels. It is used for various applications such as transparent conductive films. The film made of ITO is formed by a sputtering method, a vacuum evaporation method, a coating method, or the like. recent years,

Attention has been focused on a method of forming an ITO film or an ITO film by using ITO fine particles and applying it as a paint or kneading it into a resin. This enables processing into complex shapes.

By the way, some vehicle window glasses and architectural window glasses require functions such as heat insulation and heat ray shielding. In particular, it is necessary for vehicle window glass to block the radiant energy of solar light entering the vehicle, and to suppress temperature rise and cooling load in the vehicle. For this purpose, a heat ray reflective film consisting of a transparent thin film of metal oxide is formed on the surface of the glass, or the composition and coloring of the glass itself are adjusted to provide heat ray absorption performance and to improve the heat ray shielding property. ing. However, when a thin film of metal oxide or the like is formed on the surface of glass, conductivity is generated in the glass, so that radio wave transmission is reduced. So, for example, vehicle keyless entry systems, or future highways It may not be possible to support various systems based on radio signals such as automatic billing systems on roads.

Also, if the laminated glass interlayer used for the window glass (windshield) in front of the driver's seat of the vehicle is provided with functions such as heat ray shielding and radio wave transmission, it is useful as a window glass for vehicles and buildings. It is. Therefore, Japanese Patent Application Laid-Open No. 8-2599279 discloses that an intermediate film disposed between two transparent glass plates has a particle diameter of 0.2; Glasses in which functional ultra-fine particles having properties and radio wave permeability are dispersed have been proposed.

Generally, if fine particles are mixed in the interlayer film of a laminated glass, the haze value will increase. That is, the haze value of a laminated glass in which inorganic fine particles are distributed and blended in an interlayer film tends to be large. Therefore, in the laminated glass described in the above publication, it is said that an increase in haze value is prevented by reducing the particle diameter of the fine particles. On the other hand, even if an attempt is made to disperse and mix inorganic fine particles having a particle diameter of 0.2 m or less in the intermediate film, if sufficient dispersion cannot be realized, the haze value of the intermediate film increases due to secondary aggregation and the like. The above-mentioned publication describes that as a means for dispersing and blending the inorganic fine particles in the intermediate film, forming the intermediate film after dispersing the inorganic fine particles in a plasticizer of the intermediate film. However, even by such means, the inorganic fine particles cannot be sufficiently dispersed. In particular, when inorganic fine particles having a large or small particle size were mixed, the uniformity and dispersibility were poor. As a result, even if this is dispersed in an interlayer film of laminated glass, heat ray shielding performance is poor, or inorganic particles having a small particle size cannot be uniformly dispersed, and the haze value is large, and transparency is high. However, it was inadequate as a laminated glass for vehicles requiring visibility. Disclosure of the invention

A first object of the present invention is that, since inorganic fine particles are uniformly dispersed, a resin molded article in which inorganic fine particles are uniformly dispersed can be obtained by being blended with various resin molded articles. An object of the present invention is to provide an inorganic fine particle dispersion composition.

Further, a second object of the present invention is to provide a composition for an interlayer film capable of uniformly dispersing inorganic fine particles in an interlayer film of a laminated glass to obtain a laminated glass having low conductivity and excellent heat ray shielding properties. An object of the present invention is to provide an interlayer film and a laminated glass using the same.

The present inventors have found that in order to obtain a molded article or a coating film in which inorganic fine particles are uniformly dispersed, it is effective to obtain a liquid dispersion in which inorganic fine particles are uniformly dispersed. It was found that it is effective to mix a fatty acid ester, particularly an ester of a unsaturated ester having a hydroxyl group, at a specific ratio with the inorganic fine particles. As a result, in particular, IT-fine particles dispersed in the interlayer film of laminated glass as inorganic fine particles, which have a particle size distribution within a specific range where the particle size is smaller than before, have excellent heat ray shielding properties. At the same time, they found that it was effective for forming an interlayer having a small haze value. It has been found that it is effective to mix a specific ratio of a hydroxyl group-containing unsaturated fatty acid ester with the ITO fine particles in order to obtain a dispersion in which the ITO fine particles having the particle size distribution are uniformly dispersed. did.

The present invention relates to an inorganic fine particle, an unsaturated fatty acid ester having a hydroxyl group, and a plasticizer.

-Fine particles: Inorganic fine particle dispersion composition containing 1 to 50 parts by mass of a monounsaturated fatty acid ester to ΐ-.α parts by mass (hereinafter referred to as “the present invention”). Liquid composition of the invention ").

The present invention also provides a composition for an interlayer film of a laminated glass (hereinafter, referred to as a “membrane composition of the present invention”) using the above-described fine particle dispersion composition.

The present invention further relates to a laminated glass in which a resin material for an intermediate film comprising the composition for an intermediate film and a polyvinyl butyral-based resin or an ethylene-vinyl acetate copolymer-based resin is formed into a film. An interlayer is provided.

The present invention further provides a laminated glass in which a plurality of glass plates are laminated via the interlayer film for laminated glass. BEST MODE FOR CARRYING OUT THE INVENTION In the liquid composition or the film composition of the present invention, the inorganic fine particles have a particle size distribution in which the content of particles having a particle diameter of 40 nm or more in the liquid or the film after dispersion is 10% or less. This is preferable because it has excellent heat-ray shielding properties and a degree of particle size variation that can prevent secondary aggregation. In addition, the inorganic fine particles have a particle size distribution in which the content of particles having a particle diameter of 100 nm or more in the liquid or film after dispersion is 20% or less, particularly, a particle diameter of 70 nm. Those having a particle size distribution in which the content of the above particles is 20% or less are preferable because they have excellent heat ray shielding properties and a degree of particle diameter variation that can prevent secondary aggregation. Further, it is particularly preferable that the inorganic fine particles have a particle size distribution in which the content of particles having a particle diameter of 200 nm or more in the liquid or film after dispersion is 0.5% or less.

In the present invention, the particle size and particle size distribution of the ITO fine particles are the particle size and particle size distribution measured by a dynamic scattering type particle size distribution measuring method. Note that the particle size distribution of particles in a liquid or in a film usually indicates the content of particles having a primary particle diameter equal to or larger than a certain value, but in the present specification, it has the following meaning. That is, in the liquid composition and the film composition of the present invention, the secondary particles resulting from the secondary aggregation of the primary particles composed of single inorganic fine particles act as much as the primary particles in the liquid or the film. It has a particle size that is effective for the present invention. Therefore, the above particle size distribution refers to the particle size distribution of the inorganic fine particles in a liquid or in a film regardless of the presence or absence of secondary aggregation. And it is preferable that the liquid composition and the film composition of the present invention have the above particle size distribution including the primary particles and the secondary particles.

The inorganic fine particles used in the liquid composition or the film composition of the present invention are dispersed in various molded articles such as films, films, and sheets, and various useful functions are utilized by utilizing the unique properties of the fine particles. It is a fine particle that exerts the desired properties, and is appropriately selected according to the use, article, required characteristics, and the like. In particular, the present invention relates to a dispersion using at least one type of heat-shielding fine particles selected from IT fine particles, antimony-containing tin oxide fine particles, tin-containing aluminum oxide fine particles, zinc oxide fine particles, and titanium nitride fine particles as inorganic fine particles. Suitable for liquid compositions. The content ratio of tin: indium in the IT〇 fine particles is 1:99 to 20:80, preferably 4:96 to 15:85 by mass ratio. By setting the tin content in such a range, particularly excellent heat ray shielding properties can be obtained.

In the present invention, the inorganic fine particles may be obtained by any conventionally known production method, and are not particularly limited. For example, IT〇 fine particles are obtained by hydrolyzing an aqueous solution of an indium compound or tin compound, filtering and washing the sol containing the formed colloidal particles, and then heat-treating the mixture. Dispersion and azeotropic dehydration, followed by calcination; and by reducing the amount of water in the reaction system to the amount of the organic solvent or less, adding an aqueous alkali solution to the solution of indium salt and tin salt, and then dissolving indium hydroxide and tin hydroxide. The mixture may be produced by any method such as a method of generating a mixture of substances and performing a heat treatment. Among them, ITO fine particles obtained by heat-treating a hydrate of tin oxide and indium oxide obtained by adding an aqueous alkali solution to a solution of a tin salt and an indium salt are preferable. In this manufacturing method, it is effective to carry out a crushing treatment to a predetermined particle size in advance during the heat treatment, since coarse particles can be reduced and the particle diameter can be made uniform.

Examples of the ester of a hydroxyl group-containing unsaturated fatty acid used as a dispersant include esters of polyglycerin, sorbitan, sucrose and the like with a hydroxyl group-containing unsaturated fatty acid. In particular, an ester of polyglycerin is preferred, and the polyglycerol may contain a branched polyglycerin and a cyclic polyglycerin partially or condensed at the 3-position in addition to the linear polydaricerin condensed at the tertiary position.

The polyglycerol constituting the ester of polyglycerin may have a number average degree of polymerization of 2 to 20, and more preferably 2 to 10 in view of the dispersibility of the ITO fine particles.

In the present invention, the unsaturated fatty acid having a hydroxyl group is a chain carboxylic acid having at least one hydroxyl group and at least one double bond or triple bond in a molecule. Examples of the unsaturated fatty acid having a hydroxyl group include ricinoleic acid, stearoyl acid, and ricinoelaidic acid. Examples of the polyglycerol ester used as the ester of the unsaturated fatty acid having a hydroxyl group include one or a mixture of two or more of the following glycerin esters.

For example, diglycerin monoricinolate, diglycerin diricinolate, triglycerin monoricinolate, triglycerin diricinolate, tetraglycerin monoricinolate, tetraglycerin diricinolate, hexaglycerin monoricinolate, hexaglycerin Diricinoleate, decaglycerin monoricinoleate, decaglycerin diricinoleate, polyglycerin monoricinoleate, polyglycerin diricinoleate, polyglycerin polyricinoleate, etc. And ester conjugates of unsaturated fatty acids having a hydroxyl group with polydaricerin.

Specific examples of the ester of a hydroxyl group-containing unsaturated fatty acid used in the present invention include those marketed by Ajinomoto Co. under the trade name "Ajispa Ichi" and those sold by Sakamoto Pharmaceutical Company Limited under the trade name "SY Grease Yuichi". And the like. The plasticizer, which is an essential component of the liquid composition or the film composition of the present invention, is appropriately selected depending on the application, and is not particularly limited. For example, organic plasticizers such as monobasic acid ester and polybasic acid ester; and phosphoric acid plasticizers such as organic phosphoric acid and organic phosphorous acid are used.

Examples of the above monobasic acid esters include triethylene glycol, butyric acid, isobutyric acid, cabronic acid, 2-ethylbutyric acid, heptanoic acid, n-octylic acid, 2-ethylhexylic acid, and pelargonic acid (n-nonyl). Acid) and glycol-based esters obtained by reaction with an organic acid such as decyl acid. In addition to the above, esters obtained by reacting tetraethylene glycol or tripropylene glycol with the above organic acid can also be used.

Examples of the above-mentioned polybasic acid esters include esters obtained by reacting an organic acid such as adipic acid, sebacic acid, and azelaic acid with a linear or branched alcohol having 4 to 8 carbon atoms. . Examples of the phosphoric acid plasticizer include tributoxetyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like. Among the above plasticizers, in particular, triethylene glycol-di-2-ethylbutyrate, triethylene glycol-di-2-ethylhexoate, triethylene glycol di-caprylate, triethylene glycol-di-n-octylate and others , Dibutyl sebacate, dioctylazelate, dibutylcarbyl adipate and the like are preferably used. These may be used alone or in combination of two or more.

In the liquid composition or the film composition of the present invention, the content ratio of the inorganic fine particles and the ester of the unsaturated fatty acid having a hydroxyl group is 100 parts by mass of the inorganic fine particles with respect to 100 parts by mass of the unsaturated fatty acid having a hydroxyl group. The proportion of the ester is 1 to 50 parts by mass. From the viewpoint of achieving both the dispersibility and the heat ray shielding property, the ratio of 5-35 parts by mass of the ester of a hydroxyl group-containing unsaturated fatty acid to 100 parts by mass of the inorganic fine particles is preferable.

Further, the content ratio of the plasticizer in the liquid composition of the present invention is preferably 20 to 200 parts by mass with respect to 100 parts by mass of the inorganic fine particles from the viewpoint of good dispersibility and uniform dispersion of the inorganic fine particles. The range of parts by mass is preferred, and the range of 60 to 100 parts by mass is particularly preferred. The liquid composition of the present invention may contain, in addition to the above components, an organic solvent or the like for the purpose of lowering the viscosity during dispersion and improving the dispersibility. Organic solvents include toluene, xylene, high-boiling petroleum hydrocarbons, hydrocarbon solvents such as n-hexane, cyclohexane, and n-heptane, and halogenated hydrocarbons such as methylene chloride, chloroform, and dichloroethane. Solvent, dioxane, tetrahydrofuran, butyl ether, butyl ether, diglyme, etc., ether solvents, methyl isobutyl ketone, cyclohexanone, isophorone, etc., ketone solvents, ethyl acetate, butyric acetate, ethylene glycol monoethyl ether Ester solvents such as acetate and 2-methoxypropyl acetate, methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, butyl alcohol, t-butyl alcohol, amyl Alcohol, n - to Kishiruaruko Alcohol, n-heptyl alcohol, 2-ethylhexyl alcohol, lauryl alcohol, stearyl alcohol, cyclopentanol, cyclohexal, benzyl alcohol, p-t-butylbenzyl alcohol, etc., ethylene glycol Monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, propylene glycol monoethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, etc. And amide solvents such as dimethylformamide. These are appropriately selected depending on the use of the liquid composition or the film composition of the present invention, and these can be used alone or in combination of two or more.

The dispersion liquid composition of the present invention is produced by mixing inorganic fine particles, an ester of a unsaturated fatty acid having a hydroxyl group and a plasticizer, and other components to be blended as required, for example, an organic solvent in a roll mill, a pole mill, a sand ground. It can be manufactured by dispersing using a mill, a paint shearer, a die, a dissolver, an ultrasonic disperser, etc. as appropriate.

The dispersion is appropriately adjusted according to the particle size distribution of the inorganic fine particles, the mixing ratio of the inorganic fine particles, the ester of the unsaturated fatty acid having a hydroxyl group and the plasticizer, the dispersing device used, and the like.

The liquid composition of the present invention can be prepared to have a concentration that can be directly used for the production of laminated glass by appropriately adjusting the amount of the plasticizer in the production thereof, or stored in the form of a concentrated substance. It can be transported, diluted with a plasticizer or solvent by the user, and adjusted to an appropriate concentration before use.

INDUSTRIAL APPLICABILITY The liquid composition of the present invention is suitable as an inorganic fine particle dispersion composition for forming an interlayer film of a laminated glass for vehicles, and has a small haze value, and is capable of forming an interlayer film which is transparent and has excellent heat ray shielding properties. Can be. In addition, since it has excellent dispersibility of inorganic fine particles as well as a material for interlayer films of laminated glass for vehicles, it can be applied to uses such as a heat ray shielding film used for vehicle or building window glass. The liquid composition of the present invention may be blended with a main constituent resin of the intermediate film and, if necessary, a plasticizer and other additives to obtain a composition for an interlayer film of a laminated glass.

Examples of the main constituent resin of the intermediate film include polyvinyl butyral resin, ethylene monoacetate vinyl copolymer resin, and the like.

Still other additives include UV absorbers, light stabilizers, antioxidants, adhesion regulators, colorants, and the like.

Examples of the ultraviolet absorber include 2- (2'-hydroxy-5'-methylphenyl) benzotriazole (manufactured by Ciba-Geigy Corporation, trade name: Tinuvin P), 2- (2'-hydroxy-1 ', 5 '-Di-t-butylphenyl) benzotriazole (Ciba-Geigy Corporation, trade name: Tinuvin 320), 2- (2'-Hydroxy-3, _t-butyl_5'-Methylphenyl) -5 —Black-mouth benzotriazole (manufactured by Ciba-Geigy Corporation, trade name: Tinuvin 3 26), 2- (2′-hydroxy-3 ′, 5′-diamylphenyl) benzotriazole (manufactured by Ciba-Geigy Corporation, trade name: Benzotriazols such as tinuvin 328). Examples of the light stabilizer include hinderdamine-based light stabilizers, for example, trade name: ADK STAB LA-57 manufactured by Asahi Denka Co., Ltd.

Examples of the antioxidant include phenol-based antioxidants, for example, Sumitomo Chemical Co., Ltd., trade name: Sumilizer-I B H-cho, Ciba-Geigy Co., Ltd., trade name: Irganox 11010, and the like.

Examples of the adhesive force adjuster include a metal salt of a carboxylic acid, that is, a potassium salt of octylic acid, hexylic acid, butyric acid, formic acid, and the like.

By using the intermediate film composition and the main constituent resin of the intermediate film obtained as described above, an intermediate film for laminated glass having a small haze value, and being transparent and excellent in heat ray shielding properties can be obtained. In other words, the intermediate film composition is kneaded with the resin for the main component of the intermediate film and the additives to be added as required, and formed into a film to obtain an intermediate film.

In this case, the inorganic fine particles are contained in an amount of 0.01 to 1 part by mass based on a total mass of 100 parts by mass of the main constituent resin of the interlayer film, the inorganic fine particles, the ester of the unsaturated fatty acid having a hydroxyl group, and the plasticizer. It is preferred to contain 10 parts by mass and 0.001 to 5 parts by mass of an ester of an unsaturated fatty acid having a hydroxyl group.

By the way, from the viewpoint of improving dispersibility, a dispersion composition in which inorganic fine particles are dispersed using a small amount of a plasticizer with respect to the plasticizer required for the interlayer film is prepared, and then a composition for the interlayer film is prepared. May be. In such a case, when forming an intermediate film, an intermediate film is formed after further adding a plasticizer to the dispersion composition.

Therefore, the interlayer film for laminated glass contains 0.01 to 10 parts by mass of inorganic fine particles and 0.001 to 5 parts by mass of an ester of an unsaturated fatty acid having a hydroxyl group with respect to 30 parts by mass of the plasticizer. It is preferable to be formed from a resin material for forming an intermediate film. The following effects can be obtained by using the intermediate film produced at the above-mentioned preferable mixing ratio. That is, the interlayer film thus produced is interposed between a plurality of glass plates to produce a laminated glass in which a plurality of glass plates are laminated via the interlayer film. In this way, a laminated glass having a small haze value, being excellent in desired heat ray shielding properties, and having radio wave transmission performance, suitable for a vehicle window glass can be obtained.

《Example>

Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples of the present invention, but the present invention is not limited to these examples.

(Example 1 )

IT〇 fine particles (S η: I η = 1: 9) 120 g, polyglycerin ricinoleate (manufactured by Sakamoto Pharmaceutical Co., Ltd., SY grease Yuichi) 240 g, and a plasticizer 25,600 g was charged into Shinmaru Enterprises Bead Mill ECM-PILOT and treated for 7 hours to produce an ITO fine particle dispersion. This example is an example in which the ester of the unsaturated fatty acid having a hydroxyl group is 20 parts by mass with respect to 100 parts by mass of the ITO fine particles.

(Example 2)

ITO fine particles were dispersed in the same manner as in Example 1 except that the amount of the ITO fine particles and the amount of polyglycerin ricinoleate used were 200 g and 200 g, respectively. A liquid was produced. In this example, the amount of the ester of the unsaturated fatty acid having a hydroxyl group is 100 parts by mass with respect to 100 parts by mass of the IT fine particles.

(Example 3)

The ITO fine particle dispersion was prepared in the same manner as in Example 1 except that polyglycerin ricinoleic acid ester (manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., SY Glister-) was replaced by polyglycerin fatty acid ester (manufactured by Ajinomoto Co., Ltd., Azispar). Manufactured.

(Example 4)

ITO fine particle dispersion liquid in the same manner as in Example 2 except that polyglycerin ricinoleate (manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., SY Grease Yuichi) was replaced by polyglycerin fatty acid ester (manufactured by Ajinomoto Co., Ltd., Azispar). Was manufactured.

(Example 5)

ITO fine particle dispersions were produced in the same manner as in Example 1, except that the amounts of polyglycerin ricinoleate and plasticizer used were 6 g and 2794 g, respectively. In this example, the amount of the ester of the unsaturated fatty acid having a hydroxyl group is 0.5 part by mass with respect to 100 parts by mass of the ITO fine particles.

(Example 6)

An ITO fine particle dispersion was produced in the same manner as in Example 1 except that the amounts of the polyglycerin ricinoleate and the plasticizer were set to 700 g and 2100 g, respectively. This example is an example in which the ester of the unsaturated fatty acid having a hydroxyl group is 58 parts by mass with respect to 100 parts by mass of the ITO fine particles.

(Examples 7-9)

Instead of polyglycerin ricinoleate, polyglycerin monostearate (Example 7), polyglycerin n-hydroxystearate ester (Example 8), or polyglycerin oleate (Example 9) An ITO fine particle dispersion was produced in the same manner as in Example 1 except that the above was used.

(Evaluation)

The particle size distribution and visible light of the IT〇 fine particle dispersions obtained in Examples 1 to 9, respectively The transmittance and the haze value were measured, and the haze value of the laminated glass was measured. Table 1 shows the results. In the table, A is the particle size distribution (% of particles with a particle diameter of 40 nm or more:%), B is the particle size distribution (% of particles with a particle diameter of 70 nm or more:%), and C is the total light transmission of the dispersion. , D is the haze value of the dispersion, and E is the measurement result of the haze value of the laminated glass. Note that “aggregation” in the remarks in the table indicates that the ITO fine particles in the dispersion were aggregated so that the particle diameter became large enough to impair the transparency of the dispersion.

The particle size distribution was measured with a particle size distribution analyzer (LB-500, manufactured by Horiba, Ltd.) to measure the ratio of particles having a particle diameter of 40 nm or more and 70 nm or more. Specifically, the same dispersion was subjected to 100 times of uptake analysis of the same dispersion liquid by the standard use method described in the instruction manual for LB-500. Note that 50 iterations were performed for each data acquisition.

The total light transmittance and haze value of the dispersion in the visible light range are set so that the concentration of the ITO fine particles in the dispersion is 10% and the thickness of the liquid is about 0.1 mm between the two glass plates. Was evaluated.

The haze value was measured with a haze meter.

(Example of laminated glass)

5 g of the dispersions obtained in Examples 1 and 3, 500 g of polypinyl butyral resin, and 195 g of a plasticizer were further blended to prepare a resin composition. After melt-kneading this resin composition, it was formed into a film by a press molding machine to obtain an interlayer film for laminated glass. Similarly, from a resin composition prepared by blending 3 g of the dispersion obtained in Examples 2 and 4, 500 g of polyvinyl butyral resin, and 197 g as a plasticizer, an intermediate for laminated glass was prepared. A membrane was obtained. Similarly, an interlayer film for laminated glass was prepared from a resin composition prepared by blending 5 g of the dispersion obtained in Example 6, 500 g of polyvinyl butyral resin, and 195 g as a plasticizer. Obtained.

Each of the interlayer films thus obtained was interposed between two glass plates having a thickness of 2 mm, and after the preliminary press-bonding, they were fully press-bonded in a photoclave to obtain a laminated glass according to each example. Next, the haze value of the laminated glass was measured with a haze meter.

(

Industrial applicability

Since the inorganic fine particles are uniformly dispersed in the liquid composition of the present invention, it can be blended with various resin molded articles to obtain a resin molded article excellent in transparency in which the inorganic fine particles are uniformly dispersed. . As a more specific example, an intermediate film having a small haze value, being transparent, and having excellent heat ray shielding properties can be formed by using it as an intermediate film of laminated glass for vehicles. Further, the composition for an interlayer film of the present invention can provide a laminated glass for vehicles which has a small haze value, is transparent, and has excellent heat ray shielding properties.

Claims

The scope of the claims

1. A composition containing inorganic fine particles, an ester of a unsaturated fatty acid having a hydroxyl group, and a plasticizer, wherein the ester of the unsaturated fatty acid is added in an amount of 1 to 50 parts by mass with respect to 100 parts by mass of the inorganic fine particles. Part of the inorganic fine particle dispersion composition.

2. The inorganic fine particle dispersion composition according to claim 1, wherein the inorganic fine particles in the inorganic fine particle dispersion have a content of particles having a particle diameter of 40 nm or more of 10% or less. .

3. The inorganic fine particles are at least one kind of heat ray shielding fine particles selected from tin-containing indium oxide fine particles, antimony-containing tin oxide fine particles, tin-containing aluminum oxide fine particles, zinc oxide fine particles and titanium nitride fine particles. 3. The inorganic fine particle dispersion composition according to 1 or 2.

3. The inorganic fine particle dispersion composition according to claim 1, wherein the inorganic fine particles are tin-containing indium oxide fine particles.

5. The inorganic fine particle dispersion composition according to any one of claims 1 to 4, wherein the unsaturated fatty acid is ricinoleic acid.

6. A composition for an interlayer of a laminated glass, comprising the inorganic fine particle dispersion composition according to any one of claims 1 to 5.

7. An interlayer film for laminated glass, wherein a resin material for an interlayer film containing the composition for an interlayer film according to claim 6 and a polyvinyl butyral-based resin or an ethylene-vinyl acetate copolymer-based resin is formed in a film shape. .

8. With respect to the total mass of 100 parts by mass of the polyvinyl butyral-based resin or the ethylene-vinyl acetate copolymer-based resin, the inorganic fine particles, the ester of the unsaturated fatty acid having a hydroxyl group and the plasticizer, the inorganic fine particles are 0.01. The interlayer film for laminated glass according to claim 7, wherein the interlayer film for a laminated glass comprises from 0.01 to 10 parts by mass and from 0.0001 to 5 parts by mass of an ester of an unsaturated fatty acid having a hydroxyl group.

9. 0.01 to 10 parts by mass of inorganic fine particles and hydroxyl based on 30 parts by mass of plasticizer 9. The interlayer film for laminated glass according to claim 8, comprising 0.001 to 5 parts by mass of an ester of an unsaturated fatty acid having a group.

10. A laminated glass in which a plurality of glass plates are laminated via the interlayer film for a laminated glass according to any one of claims 6 to 9.