JPWO2018078952A1 - Resin composition for interlayer film of laminated glass, film material for interlayer film, and method for producing laminated glass - Google Patents

Abstract

Disclosed is a resin composition for an interlayer film of laminated glass comprising a copolymer of a monomer mixture containing a (meth) acryloyl compound and a silicon compound having an ethylenically unsaturated group.

Description

  The present invention relates to a resin composition for interlayer films of laminated glass, a film material for interlayer films, and a method for producing laminated glass.

  At present, laminated glass is widely used as glass for vehicles such as automobiles, sunroofs, interior panels, etc., because it is safe because glass fragments do not scatter even when damaged by external impact. Yes. Laminated glass is also used in windows for trains, aircraft, construction machinery, buildings, and the like.

  As an example of the laminated glass, an interlayer film for laminated glass made of polyvinyl acetal resin such as polyvinyl butyral resin plasticized with a plasticizer is interposed between at least a pair of glass plates, and those obtained by integrating them. (For example, see Patent Documents 1 to 3).

JP-A-62-100463 JP-A-2005-206445 International Publication No. 2012/091117

  Many conventional laminated glasses have the same degree of splitting ability as glass with the same thickness, but are more difficult to break against externally applied impacts and have high splitting ability. Is required.

  The present invention provides a resin composition for an interlayer film of laminated glass, a film material for an interlayer film, and a method for producing the laminated glass, which can produce a laminated glass excellent in splitting resistance against an externally applied impact. With the goal.

  The present invention provides a resin composition for an interlayer film of a laminated glass of a monomer mixture containing a (meth) acryloyl compound and a silicon compound having an ethylenically unsaturated group. The present invention also relates to an application of the above resin composition for producing an interlayer film of laminated glass and an application for producing laminated glass.

  The (meth) acryloyl compound may contain alkyl (meth) acrylate and (meth) acrylate having a hydroxyl group.

  The monomer mixture may contain 50 to 90 parts by mass of alkyl (meth) acrylate, 5 to 30 parts by mass of (meth) acrylate having a hydroxyl group, and 5 to 20 parts by mass of a silicon compound having an ethylenically unsaturated group.

  The resin composition according to the present invention may further contain a thermal crosslinking agent.

  The present invention also includes a base material and a resin layer provided on the base material, and the resin layer includes two glass plates facing each other and an intermediate film sandwiched between the two glass plates. A film for an interlayer film of a laminated glass, used for forming the interlayer film of a laminated glass provided, wherein the resin layer is a layer formed from the resin composition for an interlayer film Providing materials.

  The haze of the resin layer may be 5% or less.

  The present invention further relates to a method for producing a laminated glass comprising two opposing glass plates and an intermediate film sandwiched between the two glass plates, the resin layer provided for the intermediate film of the laminated glass. Including a step of bonding two glass plates together to obtain a laminate, and a step of heating and pressing the laminate under conditions of 30 to 150 ° C. and 0.3 to 1.5 MPa. A method for producing glass is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the resin composition for interlayer films of a laminated glass, a film material, and a laminated glass which can produce the laminated glass excellent in the crack prevention property with respect to the externally applied impact can be provided.

It is a schematic cross section which shows one Embodiment of the film material for interlayer films of a laminated glass. It is a schematic cross section which shows one Embodiment of a laminated glass. It is a schematic cross section which shows one Embodiment of a laminated glass.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings depending on cases, but the present invention is not limited to the following embodiments.

  In this specification, “(meth) acrylate” means at least one of “acrylate” and “methacrylate” corresponding thereto. The same applies to other similar expressions such as (meth) acryloyl.

<Resin composition for interlayer film of laminated glass>
The resin composition for an interlayer film of laminated glass of the present embodiment (hereinafter sometimes simply referred to as “resin composition”) contains a (meth) acryloyl compound and a silicon compound having an ethylenically unsaturated group. A monomer mixture copolymer.

  The resin composition according to the present embodiment includes a specific copolymer, whereby adhesion to the adherend surface such as glass is improved. Therefore, the toughness of the laminate (laminated glass) having the resin composition as an intermediate film is improved, and the high splitting property of the laminated glass can be expressed.

(Copolymer)
The copolymer according to this embodiment includes a structural unit based on a compound having a (meth) acryloyl group (however, a silicon atom is not included as a constituent atom) and a structural unit based on a silicon compound having an ethylenically unsaturated group. Is included.

  Examples of the compound having one (meth) acryloyl group include (meth) acrylic acid, (meth) acrylamide, (meth) acrylamide derivatives, alkyl (meth) acrylate, (meth) acrylate having an alkylene glycol chain, and hydroxyl group. (Meth) acrylate having an aromatic ring, (meth) acrylate having an alicyclic group, (meth) acryloylmorpholine, tetrahydrofurfuryl (meth) acrylate and (meth) acrylate having an isocyanate group It is done.

  Examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, and n-pentyl (meth). Acrylate, n-hexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, dodecyl (meth) acrylate, stearyl (meth) acrylate, etc. The alkyl (meth) acrylate which has a C1-C18 alkyl group of these is mentioned. Among these, as the alkyl (meth) acrylate, n-butyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate and n-octyl (meth) acrylate are preferable, and 2-ethylhexyl (meth) acrylate is preferable. More preferred. Alkyl acrylate is preferred over alkyl methacrylate. Alkyl (meth) acrylates may be used alone or in combination of two or more.

  Examples of the (meth) acrylate having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 1-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 1- Examples include hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and 1-hydroxybutyl (meth) acrylate.

  Examples of the (meth) acrylate having an alkylene glycol chain include polyethylene such as diethylene glycol mono (meth) acrylate, triethylene glycol mono (meth) acrylate, tetraethylene glycol mono (meth) acrylate and hexaethylene glycol mono (meth) acrylate. Glycol mono (meth) acrylate; polypropylene glycol mono (meth) acrylate such as dipropylene glycol mono (meth) acrylate, tripropylene glycol mono (meth) acrylate and octapropylene glycol mono (meth) acrylate; dibutylene glycol mono (meth) Polybutylene glycol mono (meth) acrylates such as acrylate and tributylene glycol mono (meth) acrylate; Xytriethylene glycol (meth) acrylate, methoxytetraethylene glycol (meth) acrylate, methoxyhexaethylene glycol (meth) acrylate, methoxyoctaethylene glycol (meth) acrylate, methoxynonaethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) Examples thereof include alkoxy polyalkylene glycol (meth) acrylates such as acrylate, methoxyheptapropylene glycol (meth) acrylate, ethoxytetraethylene glycol (meth) acrylate, butoxyethylene glycol (meth) acrylate, and butoxydiethylene glycol (meth) acrylate. These alkylene glycol chain-containing (meth) acrylates may be used alone or in combination of two or more.

  Examples of the (meth) acrylate having an aromatic ring include benzyl (meth) acrylate and phenoxyethyl (meth) acrylate. Examples of the (meth) acrylate having an alicyclic group include cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, and dicyclopentanyl (meth) acrylate. Examples of (meth) acrylamide derivatives include N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, and N-isopropyl (meth). Examples include acrylamide, N, N-diethyl (meth) acrylamide and N-hydroxyethyl (meth) acrylamide. Examples of the (meth) acrylate having an isocyanate group include 2- (2-methacryloyloxyethyloxy) ethyl isocyanate and 2- (meth) acryloyloxyethyl isocyanate.

  The copolymer according to this embodiment preferably includes a structural unit based on alkyl (meth) acrylate. The copolymerization ratio of the alkyl (meth) acrylate is preferably 50 to 90% by mass and more preferably 50 to 85% by mass with respect to the total mass of the copolymer. When the copolymerization ratio of the alkyl (meth) acrylate is within such a range, the adhesion between the resin layer and the adherend can be improved. Such a copolymer can be obtained by copolymerizing a monomer mixture containing alkyl (meth) acrylate in the same content ratio as the above copolymerization ratio. It is more preferable that the polymerization rate is substantially close to 100% by mass.

  The copolymer according to this embodiment preferably includes a structural unit based on (meth) acrylate having a hydroxyl group. The copolymerization ratio of the (meth) acrylate having a hydroxyl group is preferably 5 to 30% by mass and more preferably 10 to 30% by mass with respect to the total mass of the copolymer. When the copolymerization ratio of the (meth) acrylate having a hydroxyl group is within such a range, transparency with a haze of 5.0% or less can be expressed in the reliability test (heating and humidifying conditions) of the laminated glass.

Haze is a value (%) representing turbidity. The total transmittance T _{t of} light irradiated through a lamp and transmitted through the sample, and the transmittance T _{d of} light diffused and scattered in the sample. Therefore, it is obtained as (T _d / T _t ) × 100. These are defined by JIS K 7136, and can be easily measured by a commercially available turbidimeter, for example, NDH-5000 manufactured by Nippon Denshoku Industries Co., Ltd.

  The (meth) acryloyl compound according to this embodiment preferably contains an alkyl (meth) acrylate and a (meth) acrylate having a hydroxyl group.

  The (meth) acryloyl compound further contains a compound having a (meth) acryloyl group and a polar group such as a morpholino group, an amino group, a carboxyl group, a cyano group, a carbonyl group, a nitro group or a group derived from an alkylene glycol. May be. By containing the (meth) acrylate having a polar group, the adhesion between the resin layer and the adherend is easily improved.

  Examples of the silicon compound having an ethylenically unsaturated group include a group having an unsaturated bond such as a (meth) acryloyl group, a styryl group, a cinnamic acid ester group, a vinyl group, and an allyl group, and silicon as a constituent atom. If it is a compound which has an atom, it will not specifically limit. As a silicon compound which concerns on this embodiment, a siloxane compound or a silane compound may be sufficient, for example, the compound represented by following formula (a), (b) or (c) is mentioned. As the silicon compound, compounds represented by the formula (a), (b) or (c) may be used alone or in combination of two or more.

式中、Ｒ^１は水素原子又はメチル基を示し、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５、Ｒ^６及びＲ^７はそれぞれ独立に水素原子又はメチル基を示し、Ｒ^８は１価の炭化水素基を示し、Ｌ^１は酸素原子が介在してもよい２価の炭化水素基又は単結合を示し、ｍは１〜３００の整数を示す。

In the formula, R ¹ represents a hydrogen atom or a methyl group, R ² , R ³ , R ⁴ , R ⁵ , R ⁶ and R ⁷ each independently represents a hydrogen atom or a methyl group, and R ⁸ represents a monovalent carbonization. Represents a hydrogen group, L ¹ represents a divalent hydrocarbon group or a single bond in which an oxygen atom may be interposed, and m represents an integer of 1 to 300.

式中、Ｒ^１は水素原子又はメチル基を示し、Ｒ^２、Ｒ^３、Ｒ^４、Ｒ^５、Ｒ^６及びＲ^７はそれぞれ独立に水素原子又はメチル基を示し、Ｌ^１及びＬ^２はそれぞれ独立に酸素原子が介在してもよい２価の炭化水素基又は単結合を示し、ｎは１〜３００の整数を示す。

In the formula, R ¹ represents a hydrogen atom or a methyl group, R ² , R ³ , R ⁴ , R ⁵ , R ⁶ and R ⁷ each independently represents a hydrogen atom or a methyl group, and L ¹ and L ² represent each Independently represents a divalent hydrocarbon group or a single bond in which an oxygen atom may intervene, and n represents an integer of 1 to 300;

式中、Ｒ^１は水素原子又はメチル基を示し、Ｒ^９、Ｒ^１０及びＲ^１１はそれぞれ独立には水素原子又は１価の炭化水素基を示し、Ｌ^３は酸素原子が介在してもよい２価の炭化水素基又は単結合を示す。

In the formula, R ¹ represents a hydrogen atom or a methyl group, R ⁹ , R ¹⁰ and R ¹¹ each independently represents a hydrogen atom or a monovalent hydrocarbon group, and L ³ may be an oxygen atom intervening. A divalent hydrocarbon group or a single bond is shown.

  Examples of the monovalent hydrocarbon group include an alkyl group having 1 to 6 carbon atoms and a phenyl group. Examples of the divalent hydrocarbon group include an alkylene group having 1 to 20 carbon atoms.

  In the copolymer according to this embodiment, the copolymerization ratio of the monomer unit based on the silicon compound is preferably 5 to 20% by mass, and 10 to 20% by mass with respect to the total mass of the copolymer. It is more preferable. When the copolymerization ratio of the silicon compound is within such a range, the adhesion between the resin layer and the adherend is improved, and the toughness of the laminate is improved, so that the splitting property of the laminated glass is further improved. To do.

  From the viewpoint of further improving the splitting property of the laminated glass and the transparency of the interlayer film, the monomer mixture is composed of 50 to 90 parts by mass of alkyl (meth) acrylate, 5 to 30 parts by mass of (meth) acrylate having a hydroxyl group, It may contain 5 to 20 parts by mass of a silicon compound having a saturated group, 50 to 85 parts by mass of an alkyl (meth) acrylate, 10 to 30 parts by mass of a (meth) acrylate having a hydroxyl group, and silicon having an ethylenically unsaturated group You may contain 5-20 mass parts of compounds.

  The monomer mixture may contain a compound having two or more (meth) acryloyl groups and a compound having a polymerizable group other than the (meth) acryloyl group, as long as the effects exhibited by the present invention are not significantly impaired. Examples of the compound having a polymerizable group other than the (meth) acryloyl group include acrylonitrile, styrene, vinyl acetate, ethylene, propylene, and divinylbenzene.

  The weight average molecular weight (Mw) of the copolymer is preferably 80000 to 1000000, preferably 100000 to 900000, using a standard polystyrene calibration curve by gel permeation chromatography (GPC). Is more preferable, and it is still more preferable that it is 200000-800000. When the Mw of the copolymer is 80000 or more, it is easy to obtain a resin layer having adhesion to the adherend. When the Mw of the copolymer is 1,000,000 or less, the viscosity of the resin composition does not become too high, and the processability when forming the resin layer is improved.

  The copolymer according to the present embodiment can be synthesized by using a known polymerization method such as solution polymerization, emulsion polymerization, suspension polymerization, and bulk polymerization.

  As the polymerization initiator for synthesizing the copolymer, a compound that generates a radical by heat can be used. Examples of the polymerization initiator include organic peroxides such as benzoyl peroxide and lauroyl peroxide; 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-methylbutyronitrile), and the like. An azo compound is mentioned.

(Other additives)
If necessary, the resin composition may contain various additives together with the copolymer.

  As an additive, for example, a crosslinking agent may be used in order to increase the cohesive strength of the resin composition. Specific examples of the crosslinking agent include a photocrosslinking agent and a thermal crosslinking agent.

  Examples of the photocrosslinking agent include alkylene diol di (meth) acrylate having an alkylene group having 1 to 20 carbon atoms; alkylene glycol di (meth) acrylate such as polyethylene glycol di (meth) acrylate and polypropylene glycol di (meth) acrylate. Bisphenol type di (meth) acrylates such as ethoxylated bisphenol A di (meth) acrylate, ethoxylated bisphenol F di (meth) acrylate, bisphenol A type epoxy (meth) acrylate; and urethane di (meth) acrylate having a urethane bond Can be mentioned.

  The urethane di (meth) acrylate having a urethane bond may have a polyalkylene glycol chain from the viewpoint of good compatibility with other components, and from the viewpoint of ensuring transparency, an alicyclic structure. You may have. When the compatibility between the photocrosslinking agent and the copolymer is low, the resin layer formed from the resin composition may become cloudy.

  From the viewpoint of further suppressing the occurrence of bubbles and peeling under high temperature or high temperature and high humidity, the weight average molecular weight of the photocrosslinking agent is preferably 100,000 or less, more preferably 300 to 100,000, and 500 to 80,000. More preferably it is.

  The content in the case of using a photocrosslinking agent is preferably 15% by mass or less, more preferably 10% by mass or less, and preferably 7% by mass or less with respect to the total mass of the copolymer. Further preferred. When the content of the photocrosslinking agent is within such a range, a resin layer having sufficient adhesion can be obtained. Although there is no restriction | limiting in particular about the minimum of content of a photocrosslinking agent, From a viewpoint of making film forming favorable, it is preferable that it is 0.1 mass% or more, and it is more preferable that it is 2 mass% or more. More preferably, it is at least mass%.

  As a thermal crosslinking agent, thermal crosslinking agents, such as an isocyanate compound, a melamine compound, an epoxy compound, can be used, for example. As the thermal crosslinking agent, a polyfunctional thermal crosslinking agent such as trifunctional or tetrafunctional is more preferable in order to form a network structure that gently spreads in the resin layer.

  From the viewpoint of reactivity, an isocyanate compound is preferable as the thermal crosslinking agent, and a polyisocyanate compound is more preferable. Examples of the polyisocyanate compound include a polyfunctional hexamethylene diisocyanate compound which is a reaction product of hexamethylene diisocyanate trimer, triol such as totimethylolpropane, diol or monofunctional alcohol and hexamethylene diisocyanate. .

  The content in the case of using a thermal crosslinking agent is preferably 5% by mass or less, more preferably 2% by mass or less, and more preferably 1% by mass or less with respect to the total mass of the copolymer. Further preferred. When the content of the thermal crosslinking agent is within such a range, a resin layer having sufficient adhesion can be obtained. Although there is no restriction | limiting in particular about the minimum of content of a thermal crosslinking agent, From a viewpoint of making film formation favorable, it is preferable that it is 0.01 mass% or more.

  When either the copolymer or the crosslinking agent is a curing system using active energy rays, a photopolymerization initiator is required. A photoinitiator accelerates | stimulates hardening reaction by irradiation of an active energy ray. Active energy rays refer to ultraviolet rays, electron beams, α rays, β rays, γ rays and the like.

  The photopolymerization initiator is not particularly limited, and known materials such as a benzophenone compound, an anthraquinone compound, a benzoyl compound, a sulfonium salt, a diazonium salt, and an onium salt can be used.

  Examples of the photopolymerization initiator include benzophenone, N, N, N ′, N′-tetramethyl-4,4′-diaminobenzophenone (Michler ketone), N, N, N ′, N′-tetraethyl-4,4 ′. -Diaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, α-hydroxyisobutylphenone, 2-ethylanthraquinone, t-butylanthraquinone, 1,4-dimethylanthraquinone, 1-chloroanthraquinone, 2,3-dichloroanthraquinone, 3-chloro-2-methylanthraquinone, 1,2-benzoanthraquinone, 2-phenylanthraquinone, 1,4-naphthoquinone, 9,10-phenanthraquinone, thioxanthone, 2-chlorothioxanthone, 1-hydroxycyclohexyl phenyl ketone, 2,2- Aromatic ketone compounds such as methoxy-1,2-diphenylethane-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one and 2,2-diethoxyacetophenone; benzoin and methylbenzoin, ethyl Benzoin compounds such as benzoin; benzoin ether compounds such as benzoin methyl ether, benzoin ethyl ether, benzoin isobutyl ether and benzoin phenyl ether; benzyl compounds such as benzyl and benzyldimethyl ketal; β- (acridin-9-yl) (meth) acryl Ester compounds such as acids; acridine compounds such as 9-phenylacridine, 9-pyridylacridine and 1,7-diacridinoheptane; 2- (o-chlorophenyl) -4,5-diphenylimidazole dimer, 2- o-chlorophenyl) -4,5-di (m-methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4,5-diphenylimidazole dimer, 2- (o-methoxyphenyl) -4 , 5-diphenylimidazole dimer, 2- (p-methoxyphenyl) -4,5-diphenylimidazole dimer, 2,4-di (p-methoxyphenyl) 5-phenylimidazole dimer, 2- ( 2,4,5-triarylimidazole dimer such as 2,4-dimethoxyphenyl) -4,5-diphenylimidazole dimer and 2- (p-methylmercaptophenyl) -4,5-diphenylimidazole dimer 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -1-butanone; 2-methyl-1- [4- (methylthio) fe L] -2-morpholino-1-propane; bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide; oligo (2-hydroxy-2-methyl-1- (4- (1-methylvinyl) phenyl) Propanone). These compounds may be used in combination.

  Examples of the photopolymerization initiator that does not color the resin composition include 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, and 1- [4- (2-hydroxyethoxy). ) -Phenyl] -2-hydroxy-2-methyl-1-propan-1-one and the like; bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, bis (2,6 -Acylphosphine oxide compounds such as -dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide; oligo (2-hydroxy-2-methyl-1- (4 -(1-methylvinyl) phenyl) propanone) It is.

  In order to form a particularly thick resin layer, the photopolymerization initiator may be, for example, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4. -Acylphosphine oxide compounds such as trimethyl-pentylphosphine oxide and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide may also be included.

  The content of the photopolymerization initiator is preferably 0.05 to 5% by mass, more preferably 0.1 to 3% by mass, and more preferably 0.1 to 0.5% with respect to the total mass of the resin composition. More preferred is mass%. By setting the content of the photopolymerization initiator to 5% by mass or less, it is possible to obtain a resin layer that has high transmittance and is not yellowish in hue and excellent in transparency.

  If necessary, the resin composition may contain an additive other than the crosslinking agent. As an additive, for example, a polymerization inhibitor such as paramethoxyphenol added for the purpose of increasing the storage stability of the resin composition, or for the purpose of increasing the heat resistance of an intermediate film obtained by photocuring the resin composition. An antioxidant such as triphenyl phosphite, a light stabilizer such as HALS (Hindered Amine Light Stabilizer) added for the purpose of enhancing the resistance of the resin composition to light such as ultraviolet rays, and the adhesion of the resin composition to glass are enhanced. For this purpose, a silane coupling agent to be added is mentioned.

<Film material for interlayer film of laminated glass>
The film material for an interlayer film of laminated glass according to the present embodiment has a base material and a resin layer provided on the base material, and the resin layer is between the two glass plates facing each other and the two glass plates. It is used for forming an intermediate film of laminated glass comprising an intermediate film sandwiched between two layers. The said resin layer is a layer formed from the resin composition for intermediate films mentioned above.

  As shown in FIG. 1, the film material 1 for an intermediate film according to the present embodiment includes a resin layer 11, one base material 10 and the other base material 12 laminated so as to sandwich the resin layer 11. You may have.

  As the base material 10, it is preferable to use a lightly peelable base material than the base material 12. Examples of the substrate 10 include polymer films such as polyethylene terephthalate, polypropylene, and polyethylene, and among them, a polyethylene terephthalate film (hereinafter sometimes referred to as “PET film”) is preferable. From the viewpoint of workability, the thickness of the substrate 10 is preferably 25 to 150 μm, more preferably 30 to 100 μm, and still more preferably 40 to 80 μm.

  The planar shape of the substrate 10 is larger than the planar shape of the resin layer 11, and the outer edge of the substrate 10 preferably projects outward from the outer edge of the resin layer 11. The width at which the outer edge of the base material 10 protrudes from the outer edge of the resin layer 11 is preferably 2 to 20 mm from the viewpoint of ease of handling, ease of peeling, and reduction of adhesion of dust and the like, and preferably 4 to 10 mm. More preferably. When the planar shape of the resin layer 11 and the base material 10 is a substantially rectangular shape such as a substantially rectangular shape, the width of the outer edge of the base material 10 protruding from the outer edge of the resin layer 11 is 2 to 20 mm on at least one side. It is preferable that it is 4 to 10 mm on at least one side, more preferably 2 to 20 mm on all sides, and particularly preferably 4 to 10 mm on all sides.

  As the substrate 12, it is preferable to use a substrate that is more peelable than the substrate 10. Examples of the base material 12 include polymer films such as polyethylene terephthalate, polypropylene, and polyethylene, and among them, a PET film is preferable. From the viewpoint of workability, the thickness of the substrate 12 is preferably 50 to 200 μm, more preferably 60 to 150 μm, and still more preferably 70 to 130 μm.

  The planar shape of the substrate 12 is larger than the planar shape of the resin layer 11, and the outer edge of the substrate 12 preferably projects outward from the outer edge of the resin layer 11. The width at which the outer edge of the base material 12 protrudes from the outer edge of the resin layer 11 is preferably 2 to 20 mm from the viewpoint of ease of handling, ease of peeling, and reduction of adhesion of dust and the like, and preferably 4 to 10 mm. More preferably. When the planar shape of the resin layer 11 and the base material 12 is a substantially rectangular shape such as a substantially rectangular shape, the width at which the outer edge of the base material 12 projects beyond the outer edge of the resin layer 11 is 2 to 20 mm on at least one side. It is preferable that it is 4 to 10 mm on at least one side, more preferably 2 to 20 mm on all sides, and particularly preferably 4 to 10 mm on all sides.

  The peel strength between the base material 10 and the resin layer 11 is preferably lower than the peel strength between the base material 12 and the resin layer 11. Thereby, the base material 12 becomes difficult to peel from the resin layer 11 than the base material 10. The peel strength can be adjusted, for example, by subjecting the base material 12 and the base material 10 to surface treatment. As the surface treatment method, for example, a release treatment of the base material with a silicone compound or a fluorine compound may be mentioned.

  As a method of forming the resin layer 11, a known technique can be used. For example, first, the resin composition according to the present embodiment is diluted with a volatile solvent such as 2-butanone, cyclohexanone, methyl ethyl ketone, ethyl acetate, and toluene to prepare a coating solution. Subsequently, the said coating liquid is apply | coated on the base material 12, and it removes by drying a solvent, and can form the resin layer which has arbitrary thickness. In preparing the coating liquid, each component may be blended and then diluted with a solvent, or may be diluted in advance with a solvent before blending each component. As a coating method, for example, a known method such as a flow coating method, a roll coating method, a gravure coating method, a wire bar coating method, or a lip die coating method can be used.

  After forming the resin layer 11 on the base material 12, the base material 10 is laminated | stacked on the resin layer 11, and the film material for intermediate films which concerns on this embodiment is produced. The resin layer 11 is sandwiched between the base material 10 and the base material 12. In order to control the peelability between the resin layer 11 and the base material 10 and the base material 12, the resin composition may contain a surfactant such as a polydimethylsiloxane-based surfactant or a fluorine-based surfactant. Good.

  Although the thickness of the resin layer 11 is not specifically limited since it is suitably adjusted with a use use and a method, 10-5000 micrometers, 25-200 micrometers, 25-180 micrometers, or 25-150 micrometers may be sufficient. When used in this range, an interlayer film for laminated glass that is more excellent in splitting resistance against externally applied impacts can be obtained.

  The light transmittance of the resin layer 11 with respect to light in the visible light region (wavelength: 380 nm to 780 nm) is preferably 80% or more, more preferably 90% or more, and still more preferably 95% or more. .

  The haze of the resin layer 11 is preferably 5% or less, more preferably 3% or less, and still more preferably 1% or less. The haze of the laminated glass in which the resin layer 11 is sandwiched between two float glasses may be 5% or less, 3% or less, or 1% or less.

  According to the film material for an intermediate film according to this embodiment, storage and transportation can be facilitated without damaging the resin layer 11.

  As the intermediate layer, the resin layer 11 can, for example, be made of glass, glass and resin transparent substrates (or transparent films), or resin transparent substrates (or transparent films) bonded together.

<Laminated glass>
The interlayer film for laminated glass according to the present embodiment (hereinafter sometimes simply referred to as “intermediate film”) can be applied to various types of laminated glass. The laminated glass includes two glass plates facing each other and an intermediate film sandwiched between the two glass plates. The method for producing a laminated glass according to the present embodiment includes a step of bonding two glass plates to obtain a laminate through the resin layer included in the above-described interlayer film film material for laminated glass, and 30 to 150 ° C. And a step of subjecting the laminate to a heat and pressure treatment under conditions of 0.3 to 1.5 MPa.

  Examples of the glass plate include inorganic glass plates such as float glass, air-cooled tempered glass, chemically tempered glass, and multilayer glass. One or both of the two glass plates may be a resin transparent substrate. Examples of the transparent substrate include transparent plastic substrates such as acrylic resin substrates, polycarbonate substrates, cycloolefin polymer substrates, and polyester substrates.

  The thickness of the glass plate may be, for example, 0.1 to 50 mm, 0.5 to 30 mm, 1 to 20 mm, or 2 to 10 mm.

  FIG. 2 is a side sectional view schematically showing one embodiment of a laminated glass. A laminated glass 2 shown in FIG. 2 includes a first glass plate (for example, float glass) 20, an intermediate film 21, and a second glass plate (for example, float glass) 22, which are laminated in this order. The laminated glass 2 shown in FIG. 2 can be manufactured by the following method using the film material 1 for intermediate films of FIG. 1, for example.

  First, the base material 10 in the intermediate film material 1 is peeled from the resin layer 11 to expose the surface of the resin layer 11. Subsequently, after sticking the surface of the resin layer 11 used as the intermediate film 21 on the 1st glass plate (for example, float glass) 20 which is a 1st adherend, and pressing with the roller etc., the base material 12 is resin layer 11 To expose the surface. Subsequently, the surface of the resin layer 11 is attached to a second glass plate (for example, float glass) 22 which is a second adherend, and is heated and pressurized to pass through the intermediate film 21 (resin layer 11). The laminated glass 2 in which the first glass plate 20 and the second glass plate 22 are bonded together is produced.

  By using the resin layer 11, adherends can be easily bonded to each other without wrinkles. Moreover, the process of heat-pressing can also be performed in a short time at a low temperature. By using the resin layer 11, the intermediate film 21 is not whitened, and the stable transparency of the laminated glass can be maintained.

  The conditions of the heating and pressurizing treatment are a temperature of 30 to 150 ° C. and a pressure of 0.3 to 1.5 MPa, but from the viewpoint of further removing entrained bubbles, 50 to 150 ° C. or 50 to 70 ° C. 0.3-0.5 MPa may be sufficient. Further, the treatment time is preferably 5 to 60 minutes, and more preferably 10 to 30 minutes. The heat and pressure treatment can be performed using, for example, an autoclave or a vacuum laminator.

  The second adherend may be an inorganic glass plate such as float glass, but the second adherend may be a resin transparent substrate. Examples of the transparent substrate include transparent plastic substrates such as acrylic resin substrates, polycarbonate substrates, cycloolefin polymer substrates, and polyester substrates.

  The interlayer film of the laminated glass may be a single layer like the laminated glass 2 of FIG. 2, or the interlayer film is a resin layer composed of a plurality of layers like the laminated glass 2 according to the embodiment shown in FIG. There may be. The intermediate film 21 included in the laminated glass of FIG. 3 is a resin layer composed of three layers of a first layer 21a, a second layer 21b, and a third layer 23c. Copolymerization of a monomer mixture in which at least one of the first layer 21a, the second layer 21b, and the third layer 21c contains a (meth) acryloyl compound and a silicon compound having an ethylenically unsaturated group A layer formed from the resin composition for an interlayer film according to the above-described embodiment including the coalescence is preferable.

  The number of layers constituting the intermediate film may be, for example, 2 or more, 3 or more, 4 or more, 5 or more, or 6 or more, or 10 or less, 8 or less, or 7 or less. May be.

  All of the plurality of layers constituting the intermediate film may be a layer formed from the resin composition for an intermediate film according to the above-described embodiment, or a part of the plurality of layers is formed from another resin composition. It may be a layer formed. The other resin composition may contain, for example, a resin such as polyvinyl acetal resin such as polyvinyl butyral resin, ethyl vinyl alcohol resin, or ionomer.

  Among the plurality of layers constituting the intermediate film, the thickness of the layer formed from the resin composition for an intermediate film according to the above embodiment is not particularly limited, but the impact resistance and the visibility are more excellent. From a viewpoint, it is preferable that it is 75-1200 micrometers. The thickness of the other layers is not particularly limited, but is preferably 100 to 1000 μm from the same viewpoint. An example of a preferable thickness range of the entire intermediate film is the same as that of the single-layer intermediate film.

  The layer formed from the resin composition for an interlayer film according to the above-described embodiment in the interlayer film composed of a plurality of layers is provided at a position adjacent to the glass plate from the viewpoint of further improving the impact resistance of the laminated glass. It is preferable.

  Laminated glass having an intermediate film composed of a plurality of layers is the same as the laminated glass having a single-layer intermediate film described above, except that two glass plates are bonded together via a resin layer composed of a plurality of layers. Can be manufactured. A resin layer composed of a plurality of layers laminated in advance may be used, or each layer may be sequentially laminated on one glass plate, and the other glass plate may be bonded from above.

  The intermediate film according to this embodiment may be used for combining and bonding functional layers having functionality such as an antireflection layer, an antifouling layer, a dye layer, and a hard coat layer of laminated glass.

  The antireflection layer may be a layer having antireflection properties such that the visible light reflectance is 5% or less. As the antireflection layer, a layer obtained by treating a transparent substrate such as a transparent plastic film with a known antireflection method can be used.

  The antifouling layer is for preventing the surface from becoming dirty. As the antifouling layer, a known layer made of a fluorine-based resin or a silicone-based resin can be used to reduce the surface tension.

  The dye layer is used to increase color purity, and is used to reduce light having an unnecessary wavelength that is transmitted through the laminated glass. The dye layer can be obtained by dissolving a dye that absorbs light having an unnecessary wavelength in a resin and forming or laminating it on a base film such as a polyethylene film or a polyester film.

  The hard coat layer is used to increase the surface hardness. As a hard-coat layer, what formed or laminated | stacked acrylic resin, such as urethane acrylate and an epoxy acrylate; base films, such as a polyethylene film, can be used, for example. Similarly, in order to increase the surface hardness, a hard coat layer formed or laminated on a transparent protective plate such as glass, acrylic resin, or polycarbonate can be used.

  When setting it as such a laminated body, the resin layer 11 can be laminated | stacked using a roll lamination, a vacuum bonding machine, or a single wafer bonding machine.

  With the laminated glass manufacturing method according to the present embodiment, a laminated glass excellent in splitting resistance against an externally applied impact can be produced.

  Hereinafter, the present invention will be described by way of examples. In addition, this invention is not limited to a following example.

The weight average molecular weight (Mw) of the copolymer produced in the production example was measured using a standard polystyrene calibration curve according to the GPC method and using the following GPC measurement apparatus and measurement conditions.
RI detector: L-3350 (Hitachi, Ltd., product name)
Eluent: THF
Column: Gelpac GL-R420 + R430 + R440 (Hitachi Chemical Co., Ltd., product name)
Column temperature: 40 ° C
Flow rate: 2.0 mL / min

Production Example 1
In a reaction vessel equipped with a condenser, a thermometer, a stirrer, a dropping funnel and a nitrogen inlet tube, 85.0 g of 2-ethylhexyl acrylate, 10.0 g of 2-hydroxyethyl acrylate, one-end methacryloyl-modified polysiloxane compound (Shin-Etsu Chemical Co., Ltd.) Co., Ltd., product name “X-22-2426”, ethylenically unsaturated group equivalent: 12000 g / mol) 5.0 g and ethyl acetate 145.0 g are added, and nitrogen substitution is performed with an air volume of 100 mL / min in 15 minutes. It heated from normal temperature (25 degreeC) to 65 degreeC. Next, while maintaining the temperature at 65 ° C., a solution in which 0.1 g of lauroyl peroxide was dissolved in 5.0 g of ethyl acetate was added and reacted for 8 hours to obtain a copolymer A-1 (Mw 700,000) having a solid concentration of 40%. A solution was obtained.

Production Example 2
In a reaction vessel, 2-ethylhexyl acrylate 80.0 g, 2-hydroxyethyl acrylate 10.0 g, one-end methacryloyl-modified polysiloxane compound (ethylenically unsaturated group equivalent: 12000 g / mol) 10.0 g and ethyl acetate 145.0 g were added. A solution of copolymer A-2 (Mw 700,000) having a solid content concentration of 40% was obtained in the same manner as in Production Example 1 except for the addition.

Production Example 3
In a reaction vessel, 20.0 g of 2-ethylhexyl acrylate, 10.0 g of 2-hydroxyethyl acrylate, 20.0 g of one-end methacryloyl-modified polysiloxane compound (ethylenically unsaturated group equivalent: 12000 g / mol) and 145.0 g of ethyl acetate were added. A solution of copolymer A-3 (Mw 700,000) having a solid content concentration of 40% was obtained in the same manner as in Production Example 1 except for the addition.

Production Example 4
In a reaction vessel, 25.0 g of 2-ethylhexyl acrylate, 25.0 g of 2-hydroxyethyl acrylate, 20.0 g of one-end methacryloyl-modified polysiloxane compound (ethylenically unsaturated group equivalent: 12000 g / mol) and 145.0 g of ethyl acetate were added. A solution of copolymer A-4 (Mw 700,000) having a solid content concentration of 40% was obtained in the same manner as in Production Example 1 except for the addition.

Production Example 5
In a reaction vessel, 2-ethylhexyl acrylate 80.0 g, 2-hydroxyethyl acrylate 10.0 g, both-end methacryloyl-modified polysiloxane compound (Shin-Etsu Chemical Co., Ltd., product name “X-22-164E”, ethylenically unsaturated group) (Equivalent: 7800 g / mol) Except for adding 10.0 g and ethyl acetate 145.0 g, the same procedure as in Production Example 1 was followed to obtain a solution of copolymer A-5 (Mw 700000) having a solid content concentration of 40%. .

Production Example 6
The same operation as in Production Example 1 except that 80.0 g of 2-ethylhexyl acrylate, 10.0 g of 2-hydroxyethyl acrylate, 10.0 g of 3-acryloxypropyltrimethoxysilane and 145.0 g of ethyl acetate were added to the reaction vessel. Thus, a solution of copolymer A-6 (Mw 700,000) having a solid concentration of 40% was obtained.

Production Example 7
In a reaction vessel, 2-ethylhexyl acrylate 80.0 g, 4-hydroxybutyl acrylate 10.0 g, one-end methacryloyl-modified polysiloxane compound (ethylenically unsaturated group equivalent: 7800 g / mol) 10.0 g and ethyl acetate 145.0 g A solution of copolymer A-7 (Mw 700,000) having a solid content concentration of 40% was obtained in the same manner as in Production Example 1 except for the addition.

Production Example 8
Copolymer A-8 having a solids concentration of 40% was prepared in the same manner as in Production Example 1 except that 90.0 g of 2-ethylhexyl acrylate, 10.0 g of 2-hydroxyethyl acrylate and 145.0 g of ethyl acetate were added. Mw 700,000) was obtained.

<Preparation of resin composition for interlayer film and production of film material for interlayer film>
Example 1
For 100 parts by mass of the copolymer A-1 solution obtained in Production Example 1, 0.2 parts by mass of a polyisocyanate compound (Tosoh Corporation, product name “Coronate HL”) is used as a thermal crosslinking agent. By mixing, a coating liquid of the resin composition was prepared.
Next, a coating liquid of the resin composition was applied to a PET film (base material 12) having a thickness of 75 μm on the surface using a bar coater so that the thickness after drying was 100 μm. The resin layer was formed by heating and drying for a minute. Thereafter, a PET film (base material 10) having a thickness of 75 μm that had been subjected to a mold release treatment was placed on the resin layer, and this was attached with a 1.0 kgf hand roller to produce an intermediate film material.

Example 2
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-2 obtained in Production Example 2 was used.

Example 3
A resin composition coating film and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-3 obtained in Production Example 3 was used.

Example 4
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-4 obtained in Production Example 4 was used.

Example 5
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-5 obtained in Production Example 5 was used.

Example 6
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-6 obtained in Production Example 6 was used.

Example 7
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-7 obtained in Production Example 7 was used.

Comparative Example 1
A resin composition coating solution and a film material were obtained in the same manner as in Example 1 except that the solution of copolymer A-8 obtained in Production Example 8 was used.

Comparative Example 2
Polyvinyl butyral (PVB) resin having a half-width of a peak corresponding to a hydroxyl group obtained by measuring an infrared absorption spectrum of 245 cm ⁻¹ (degree of acetalization 68.0 mol%, vinyl acetate component ratio 0.6 mol %) 100 parts by mass and 38 parts by mass of triethylene glycol bis (2-ethylhexanoate) as a plasticizer were mixed and sufficiently melt-kneaded with a mixing roll, and then pressed at 150 ° C. for 30 minutes with a press molding machine. Molding was performed to obtain a 380 μm-thick resin film containing PVB resin, which was used as an interlayer film for laminated glass.

<Evaluation>
About the film material for intermediate films obtained by each Example and the comparative example, it evaluated by the following method. The results are shown in Table 1.

1. Measurement of Haze A sample having a size of 50 mm × 50 mm was cut out from the film material for an interlayer film of Example and Comparative Example 1, and this was left under conditions of 85 ° C. and 85% RH for 24 hours. Then, after peeling the base material 10 and exposing the surface of the resin layer, the surface of the resin layer was affixed to float glass 50 mm long, 50 mm wide, and 2.7 mm thick, and pressed with a roller. Next, the substrate 12 is peeled off from the resin layer to expose the surface of the resin layer, and the surface of the resin layer is made into a float glass having a length of 50 mm, a width of 50 mm, and a thickness of 2.7 mm in a vacuum state using a vacuum laminator. The laminated body was produced by pasting. Then, the laminated body was heat-pressed by an autoclave under conditions of a temperature of 50 ° C., a pressure of 0.5 MPa, and a holding time of 30 minutes to obtain a laminated glass. In Comparative Example 2, the resin film was cut into a size of 50 mm × 50 mm, left for 24 hours under the conditions of 85 ° C. and 85% RH, then taken out and sandwiched with the float glass, temperature 135 ° C., pressure 118 N / cm ^2. A laminated glass was obtained by heating and pressurizing with an autoclave at 20 MPa for 20 minutes.
The haze was measured for the obtained laminated glass using the turbidimeter (Nippon Denshoku Industries Co., Ltd. make, NDH-5000).

2. Production of Laminated Glass After the base material 10 was peeled from the film material for an intermediate film produced in Example and Comparative Example 1 to expose the surface of the resin layer, the surface of the resin layer was 110 mm long, 110 mm wide, and thickness 2. Affixed to a 7 mm float glass and pressed with a roller. Next, the base material 12 is peeled off from the resin layer to expose the surface of the resin layer, and the surface of the resin layer is stuck on a float glass having a length of 110 mm, a width of 110 mm, and a thickness of 2.7 mm in a vacuum state using a vacuum laminator. Thus, a laminate was produced. Then, the laminated body was heat-pressed by an autoclave under conditions of a temperature of 50 ° C., a pressure of 0.5 MPa, and a holding time of 30 minutes to obtain a laminated glass.
The resin film produced in Comparative Example 2 is sandwiched between float glasses, heated and pressurized by an autoclave under conditions of a temperature of 135 ° C., a pressure of 118 N / cm ² MPa, and held for 20 minutes, and a resin film containing PVB resin is provided as an intermediate film. A laminated glass was obtained.

3. Impact resistance test A steel ball with a mass of about 1040g and a diameter of 63.5mm is placed in the order of 5cm to 100cm in 5cm increments at a position within 25mm from the center point of the produced 110mm long and 110mm wide laminated glass (peripheral support). The height when the glass broke was recorded. Six laminated glasses made of the respective interlayer films were tested, and the average height was calculated. The higher the value of the broken glass, the higher the splitting property. Furthermore, on the basis of the height at which the laminated glass of Comparative Example 2 having an interlayer film containing PVB resin was broken, the height at which the laminated glass of each Example and Comparative Example was broken was calculated according to the following formula (1). The value was calculated as a split ratio.
Split ratio: height of broken glass of each measurement sample / height of broken glass of Comparative Example 2 (1)

4). Laminated glass with multilayer interlayer Example 8
After peeling one PET film from the film material of Example 1 to expose the surface of the resin layer, the surface of the resin layer was attached to float glass having a length of 110 mm, a width of 110 mm, and a thickness of 2.7 mm, and pressed with a roller. It was. Next, the other PET film is peeled off from the resin layer to expose the surface of the resin layer, and a 760 μm-thick polyvinyl butyral resin film (made by Sekisui Chemical Co., Ltd., hereinafter referred to as “PVB film”) is exposed on the surface of the exposed resin layer. ) And pressed with a roller. Subsequently, the surface of the PVB film was attached to float glass having a length of 110 mm, a width of 110 mm, and a thickness of 2.7 mm in a vacuum state using a vacuum laminator to prepare a laminate. Thereafter, the laminate is heated and pressurized by holding it for 30 minutes under a vacuum condition at a temperature of 120 ° C. using a vacuum laminator, and an intermediate film composed of a layer containing the copolymer P-1 and a PVB film is formed. A laminated glass provided was obtained.

Example 9
After peeling off one PET film from the film material of Example 1 to expose the surface of the resin layer, a PVB film (manufactured by Sekisui Chemical Co., Ltd.) having a thickness of 380 μm was attached to the surface of the exposed resin layer, and a roller was used. Pressed. Next, the other PET film was peeled from the resin layer to expose the surface of the resin layer, and a PVB film having a thickness of 380 μm was attached to the exposed surface of the resin layer and pressed with a roller. Subsequently, using a vacuum laminator, the surfaces of the PVB films on both sides were attached to float glass having a length of 110 mm, a width of 110 mm, and a thickness of 2.7 mm to prepare a laminate. Thereafter, the laminate was heated and pressurized by holding it for 30 minutes under a vacuum condition at a temperature of 120 ° C. using a vacuum laminator, and a layer containing copolymer P-1 and two PVB films sandwiching the layer 3 The laminated glass provided with the intermediate film which consists of a layer was obtained.

Comparative Example 3
A float glass having a length of 110 mm, a width of 110 mm, and a thickness of 2.7 mm was used without any particular treatment.

Evaluation The produced laminated glass, the laminated glass of Comparative Example 2 and the float glass of Comparative Example 3 were subjected to the same impact resistance test as described above, and the height of the laminated glass of Comparative Example 2 was determined as a reference. The splitting ratio was determined. For the laminated glass of Example 8, Test Example 1 in which the layer adjacent to the float glass on the upper side (the side on which the hard sphere collides) was a resin layer containing the copolymer P-1, and the layer adjacent to the upper float glass The impact resistance test of Test Example 2 was conducted using PVB film. In addition, the penetration resistance of each laminated glass was evaluated by determining “A” when the hard sphere did not penetrate the glass when the glass was broken, and “B” when the rigid sphere penetrated the glass. . Table 2 shows the evaluation results.

  DESCRIPTION OF SYMBOLS 1 ... Film material for intermediate films of laminated glass, 2 ... Laminated glass, 10, 12 ... Base material, 11 ... Resin layer, 20, 22 ... Glass plate (for example, float glass), 21 ... Intermediate film.

Claims (7)

  The resin composition for interlayer films of a laminated glass containing the copolymer of the monomer mixture containing a (meth) acryloyl compound and the silicon compound which has an ethylenically unsaturated group.   The resin composition for interlayer films according to claim 1, wherein the (meth) acryloyl compound contains an alkyl (meth) acrylate and a (meth) acrylate having a hydroxyl group.   The monomer mixture contains 50 to 90 parts by mass of the alkyl (meth) acrylate, 5 to 30 parts by mass of the (meth) acrylate having a hydroxyl group, and 5 to 20 parts by mass of a silicon compound having the ethylenically unsaturated group. The resin composition for interlayer films according to claim 2.   The resin composition for interlayer films according to any one of claims 1 to 3, further comprising a thermal crosslinking agent. A laminated glass comprising a base material and a resin layer provided on the base material, wherein the resin layer includes two glass plates facing each other and an intermediate film sandwiched between the two glass plates A film material for an interlayer film of laminated glass used to form the interlayer film of
The film material for intermediate films whose said resin layer is a layer formed from the resin composition for intermediate films as described in any one of Claims 1-4.   The film material for an intermediate film according to claim 5, wherein the haze of the resin layer is 5% or less. A method for producing a laminated glass comprising two opposing glass plates and an intermediate film sandwiched between the two glass plates,
A step of bonding the two glass plates together to obtain a laminate through the resin layer provided in the interlayer film material according to claim 5 or 6;
A step of heating and pressurizing the laminate under conditions of 30 to 150 ° C. and 0.3 to 1.5 MPa;
A method for producing laminated glass, comprising:

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