Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
  • B60J1/00—Windows; Windscreens; Accessories therefor
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
  • C08K5/101—Esters; Ether-esters of monocarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
  • C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
  • C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
  • C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols

Definitions

• the present invention relates to an interlayer film for laminated glass and laminated glass.
• a glass plate used for a window glass or the like is excellent in durability and daylighting property, but it is known that its damping performance (1 an 8 for bending vibration) is very small. For this reason, there is a phenomenon (coincidence effect) in which the vibration of the glass and the vibration of the incident sound wave coincide with each other to cause a resonance state and the transmission loss is significantly reduced.
• an interlayer film for laminated glass (hereinafter, also simply referred to as “intermediate film”) having excellent damping performance.
• the interlayer film has the ability to reduce vibrational energy by converting it into thermal energy.
• an intermediate film for example, in Patent Document 1, a resin film 8 made of a copolymer of polystyrene and a rubber resin (hereinafter referred to as “styrene-based thermoplastic elastomer”) is a plasticized polyvinyl acetal.
• An intermediate film for laminated glass has been proposed which is sandwiched between resin film layers made of a base resin.
• the resin film (laminated resin film) to be laminated adjacent to the resin film containing the polyvinyl acetal resin and the plasticizer is the styrene-based thermal resin as in the above example.
• the plasticizer for example, dihexyl adipate, dioctyl phthalate, and other polyvalent calcium.
• Patent Document 1 Japanese Patent Laid-Open No. 2007_9 1 4 9 1
• Patent Document 2 International Publication No. 2 0 1 1/0 1 6 4 9 5 Panfret
• the polyvinyl acetal resin composition using a plasticizer or an ether plasticizer as a plasticizer has higher hygroscopicity than the case where 3°8 is used as a plasticizer, and as a result, such a resin composition
• a plasticizer or an ether plasticizer as a plasticizer
• the adhesion of the polyvinyl acetal resin layer to glass can be controlled by the addition amount of an adhesion control agent such as magnesium acetate, but the polyvinyl acetal resin has high hygroscopicity or contains a large amount of water. In the layer, it was also found that there is a problem that the influence of the decrease in adhesive strength due to moisture is large and it is difficult to control with an adhesive strength modifier. ⁇ 2020/175178 3 (:171? 2020/005739
• the present invention can provide an interlayer film that can solve the above-mentioned problems, that is, can achieve sufficient adhesion to glass and control of adhesion to glass with sufficiently high transparency and sound insulation.
• the purpose is to provide a good interlayer film.
• the present inventors have conducted extensive studies on an interlayer film for laminated glass, and as a result, completed the present invention. That is, the present invention includes the following preferred embodiments.
• An interlayer film for laminated glass comprising at least one layer composed of a thermoplastic resin material and at least one layer composed of a polyvinyl acetal resin composition
• the thermoplastic resin material comprises, as a thermoplastic resin, a polymer block containing 60 mol% or more of an aromatic vinyl monomer unit (3) and a polymer block containing 60 mol% or more of a conjugated gen monomer unit. 13) and a block copolymer hydrogenated product having, and the content of the polymer block (3) in the block copolymer hydrogenated product is relative to the total mass of the block copolymer hydrogenated product. 25% by mass or less,
• the polyvinyl acetal resin composition contains a polyvinyl acetal resin and a plasticizer having an aromatic ring in its molecular structure, and the content of the plasticizer is ⁇ to 100 parts by mass of the polyvinyl acetal resin. 5 to 100 parts by mass, and the three values of the plasticizer are 1.0.
• An interlayer film for laminated glass that is 2 or more.
• the polyvinyl acetal resin composition contains, as the plasticizer, one or more plasticizers selected from the group consisting of benzoic acid esters, aromatic phosphoric acid esters and phthalic acid esters, [1] to The interlayer film for laminated glass according to any one of [4].
• the polyvinyl acetal resin composition further contains one or more magnesium salts selected from the group consisting of magnesium salts of carboxylic acids having 2 to 12 carbon atoms, [1] to [5] An interlayer film for laminated glass according to any one of 1.
• thermoplastic resin material is measured by performing a complex shear viscosity test under the condition of frequency 1 1 to 1 according to “3 ⁇ 7 2 4 4 — 1 0 :2 0 0 5”. Any one of the above [1] to [6], which has one peak with a maximum of 3 n 5 in the range of 30° ⁇ or more and 10° ⁇ or less, and the height of the one peak is 1.5 or more.
• the eight layers having a thickness of 100 or more and 400 or less, and the thickness of one layer laminated on both surfaces of the eight layers is 200 or more!
• Laminated glass which is a vehicle sunroof, vehicle rear glass or head-up display glass.
• FIG. 1 is a schematic cross-sectional view showing a configuration which is one embodiment of an interlayer film for laminated glass of the present disclosure.
• FIG. 2 is a schematic cross-sectional view showing a configuration which is one embodiment of an interlayer film for laminated glass of the present disclosure.
• the interlayer film for laminated glass of the present disclosure includes at least one layer including eight layers made of a thermoplastic resin material and at least one layer including a polyvinyl acetal resin composition.
• the polyvinyl acetal resin composition constituting the Mitsumi layer contains a polyvinyl acetal resin and a plasticizer having an aromatic ring in its molecular structure, and the content of the plasticizer is 100 parts by mass of the polyvinyl acetal resin. 0.5 to 100 parts by mass, and the three values of the plasticizer (solubility parameter, 3 0 1 l 1 0 1 I-so ⁇ ⁇ !) are 1 0.0 (solubility parameter, 3 0 1 l 1 0 1 I-so ⁇ ⁇ !) are 1 0.0 (solubility parameter, 3 0 1 l 1 0 1 I-so ⁇ ⁇ !) are 1 0.0 (solubility parameter, 3 0 1 l 1 0 1 I-so ⁇ ⁇ !) are 1 0.0 (solubility parameter, 3 0 1 l 1 0 1 I-so ⁇ ⁇ !) are 1 0.0 (solubility parameter, 3 0
• the plasticizer is a plasticizer having specific 3 values and having an aromatic ring in the molecular structure.
• a plasticizer having a specific 3 value and having an aromatic ring in the molecular structure will be described.
• the plasticizer contained in the polyvinyl acetal resin composition forming the Mitsumi layer has an aromatic ring in the molecular structure.
• the 3 value of the plasticizer to 1 0.0 ( ⁇ 3 ⁇ / Rei_rei_1 3) 2 or more, adjacent layers, e.g.
• the plasticizer for the eight layers described below [a layer composed of a thermoplastic resin material containing a hydrogenated product of an aromatic vinyl-conjugated gen-based block copolymer (for example, a styrene-based thermoplastic elastomer) as a thermoplastic resin]
• the migration can be suppressed. If the plasticizer contains many functional groups other than aromatic rings, ⁇ 2020/175178 6 ⁇ (: 171-1?2020/005739
• the value of 3 becomes low, and as a result, migration of the plasticizer to the adjacent layer, for example, eight layers is likely to occur, which easily causes haze in the eight layers or deterioration of sound insulation properties of the laminated glass.
• the three values of the plasticizer in the present disclosure are preferably not less than, more preferably 10.3 ( ⁇ 3I Ku 1 0.4 ( ⁇ / Rei_rei_1 3) 1/2 or more, particularly preferably 1 0.5 ( ⁇ 3 ⁇ / ⁇ 3) That is all. here, Is a value calculated according to the calculation method of 60 ”3 ([3 ⁇ 4..6 ⁇ ⁇ , , 1 4, 1 47 (1 974)).
• the plasticizer having a specific three value and having an aromatic ring in the molecular structure preferably has no hydroxyl group in the molecular structure.
• the hydroxyl group-containing plasticizer is preferable from the viewpoint that it is easy to suppress the migration of the plasticizer from a layer composed of a resin composition containing the plasticizer to an adjacent layer (for example, a layer).
• the hygroscopicity of the resin composition containing the plasticizer also becomes high. Therefore, an interlayer film including a layer composed of such a resin composition may be formed.
• problems may occur with respect to the adhesion to glass and the controllability of adhesion.
• the plasticizer having a specific 3 value and having an aromatic ring in the molecular structure preferably has a hydroxyl value of 10. Below, 9.
• the hydroxyl value of the plasticizer can be measured according to "3" ⁇ 1 557.
• the plasticizer can have a refractive index n D of about 1.5 or more.
• Refractive index of the layer composed of polyvinyl acetal resin composition containing such plasticizer is polyvinyl acetal resin containing a plasticizer such as 308 are generally used (n D of about 1.45)
• n D of about 1.405
• the difference between the refractive index of the surface layer and the refractive index of the inner layer may be observed. The smaller the difference in refractive index, the more the light scattering caused by the light is suppressed.
• Servant ⁇ 0 2020/175 178 7 ⁇ (: 17 2020 /005739
• the refractive index n D of the plasticizer is preferably 1.50 or more, more preferably 1.51 or more, and particularly preferably 1.
• the refractive index of a plasticizer can be measured by, for example, an Abbe refractometer
• the polyvinyl acetal resin composition contains, as the plasticizer, one or more plasticizers selected from the group consisting of benzoic acid esters, aromatic phosphoric acid esters and phthalic acid esters.
• the benzoic acid ester is not particularly limited as long as it has specific 3 values, and a known benzoic acid ester can be used as a plasticizer.
• the bonding group with benzoic acid is an alkylene glycol group
• the repeating unit of the glycol chain is preferably 10 or less from the viewpoint of easily obtaining low hygroscopicity.
• Specific examples of such benzoic acid ester include diethylene glycol dibenzoate (
• alkylene glycol dibenzoates such as dipropylene glycol dibenzoate ( ⁇ ).
• benzoic acid ester can also be preferably used, and examples of such products include Koujo (“Monosizer Minichi 38” and “Monosizer Minichi 10” manufactured by 3 stock companies, as well as stocks.
• An example is "Adeka Sizer N- 6 1 2 0" manufactured by the company Hachimitsu Hachi.
• the aromatic phosphoric acid ester is not particularly limited as long as it has three specific values, and an aromatic phosphoric acid ester known as a plasticizer can be used. Specific examples thereof include triphenyl phosphate (D), tricresyl phosphate (D), and trixylenyl phosphate (D).
• the phthalic acid ester is not particularly limited as long as it has three specific values, and a known phthalic acid ester can be used as a plasticizer. Specific examples thereof include diphenyl phthalate and benzylputyl phthalate (Mimi).
• the polyvinyl acetal resin composition of the present disclosure is ⁇ 2020/175 178 8 ⁇ (:171? 2020 /005739
• plasticizer having an aromatic ring in the molecular structure.
• plasticizers may be contained alone or in combination of two or more.
• the polyvinyl acetal resin composition of the present disclosure may further contain one or more plasticizers other than such plasticizers.
• the content of the plasticizer having a specific 3 value and an aromatic ring in the molecular structure is 0.5 to 100 parts by mass with respect to 100 parts by mass of the polyvinyl acetal resin. is there .
• the content of the plasticizer is preferably 50 parts by mass or less, more preferably 45 parts by mass or less, from the viewpoint of easily obtaining good impact resistance of the laminated glass using the obtained interlayer film. It is preferably 43 parts by mass or less, and particularly preferably 40 parts by mass or less.
• the content of the plasticizer is preferably 1 part by mass or more, more preferably 5 parts by mass or more, and further preferably 10 parts by mass or more with respect to 100 parts by mass of the polyvinyl acetal resin.
• the content of the plasticizer may be preferably 15 parts by mass or more, 20 parts by mass or more, or 25 parts by mass or more with respect to 100 parts by mass of the polyvinyl acetal resin.
• the ratio of plasticizers that have a specific value of 3 to the total mass of plasticizers and that have an aromatic ring in the molecular structure is such that the migration of plasticizers from the Mitsumi layer to the adjacent layers (for example, eight layers) is low.
• the ratio of plasticizers that have a specific value of 3 to the total mass of plasticizers and that have an aromatic ring in the molecular structure is such that the migration of plasticizers from the Mitsumi layer to the adjacent layers (for example, eight layers) is low.
• the ratio of plasticizers that have a specific value of 3 to the total mass of plasticizers and that have an aromatic ring in the molecular structure is such that the migration of plasticizers from the Mitsumi layer to the adjacent layers (for example, eight layers) is low.
• the polyvinyl acetal resin composition of the present disclosure contains a polyvinyl acetal resin in addition to the plasticizer.
• the degree of acetalization of the polyvinyl acetal resin used in the present disclosure is preferably 40 mol% or more, more preferably 60 mol% or more, preferably 90 mol% or less, more preferably 85 mol% or less. , And more preferably 80 m ⁇ 2020/175 178 9 ⁇ (:171? 2020 /005739
• the degree of acetalization is a unit consisting of two carbons in the main chain of a polyvinyl alcohol-based resin, which is a raw material for the production of polyvinyl acetal resin (for example, a vinyl alcohol unit, a vinyl acetate unit, an ethylene unit, etc.), and a repeating unit. It is the amount of the above-mentioned unit forming acetal, based on the one repeating unit.
• the degree of acetalization is within the range of the lower limit value and the upper limit value described above, the compatibility of the polyvinyl acetal resin and the plasticizer tends to be good, and the polyvinyl acetal resin composition containing the polyvinyl acetal resin and the plasticizer is formed. This is preferable from the viewpoint of the process because the product can be easily obtained.
• the degree of acetalization of the polyvinyl acetal resin is preferably 65 mol% or more from the viewpoint of water resistance. The degree of acetalization can be adjusted by adjusting the amount of aldehyde used in the acetalization reaction.
• the content of vinyl acetate units in the polyvinyl acetal resin is preferably 30 mol% or less, more preferably 20 mol% or less.
• the content of vinyl acetate units is a unit consisting of two carbons in the main chain of the polyvinyl alcohol resin, which is the raw material for the production of polyvinyl acetal resin (for example, vinyl alcohol units, vinyl acetate units, ethylene units, etc.).
• the unit is the amount of vinyl acetate units based on one repeating unit.
• the lower limit of the content of vinyl acetate units is not particularly limited.
• the content of vinyl acetate units is usually 0.3 mol% or more.
• the content of the vinyl acetate unit can be adjusted by appropriately adjusting the saponification degree of the raw material polyvinyl alcohol resin.
• the content of vinyl alcohol units in the polyvinyl acetal resin is preferably
• the content of the vinyl alcohol unit is a unit composed of two carbons in the main chain of the polyvinyl alcohol-based resin, which is a raw material for manufacturing polyvinyl acetal resin (for example, ⁇ 2020/175178 10 ⁇ (: 171-1? 2020/005739
• vinyl alcohol units are defined as one repeating unit, and the amount of vinyl alcohol units is based on the repeating unit.
• the content of the vinyl alcohol unit is equal to or more than the lower limit value, the adhesion force with glass can be easily controlled well. Further, when the content of the vinyl alcohol unit is not more than the upper limit value, the penetration resistance or impact resistance function required for the interlayer film as a safety glass can be controlled appropriately.
• the content of vinyl alcohol unit can be adjusted by adjusting the amount of aldehyde used in the acetalization reaction.
• a polyvinyl acetal resin is usually composed of an acetal-forming unit, a vinyl alcohol unit, and a vinyl acetate unit, and the amount of each of these units is, for example, "" 3 ⁇ 6 7 2 8 "Polyvinyl petilal test method" Or nuclear magnetic resonance method (1 ⁇ /
• polyvinyl acetal resin only one kind may be used alone, or two or more kinds having different acetalization degrees or viscosity average polymerization degrees may be used in combination.
• the polyvinyl acetal resin can be produced by a conventionally known method, typically, it can be produced by acetalizing a polyvinyl alcohol resin (for example, a polyvinyl alcohol resin or an ethylene vinyl alcohol copolymer) with aldehyde.
• a polyvinyl alcohol resin for example, a polyvinyl alcohol resin or an ethylene vinyl alcohol copolymer
• aldehyde for example, a polyvinyl alcohol resin is dissolved in warm water, and the obtained aqueous solution is heated to a predetermined temperature (for example, 0 ° ⁇ or more, preferably 10°° or more, for example, 90°° or less, preferably 20° or less.
• the temperature is maintained at 0°C or below), the required acid catalyst and aldehyde are added, and the acetalization reaction proceeds while stirring.
• the reaction temperature is raised to about 70 ° C. to ripen it to complete the reaction, and then neutralization, washing with water and drying are carried out to
• the viscosity average polymerization degree of the polyvinyl alcohol-based resin which is a raw material of the polyvinyl acetal resin, is preferably 100 or more, more preferably 300 or more, more preferably 400 or more, and further preferably 60. 0 or more, particularly preferably 70 ⁇ 2020/175178 1 1 ⁇ (: 171-1?2020/005739
• the viscosity average degree of polymerization of the polyvinyl alcohol resin is preferably 500 or less, more preferably 300 or less, further preferably 250 or less, particularly preferably 230 or less, most preferably Is less than 2000. If the viscosity average degree of polymerization of the polyvinyl alcohol resin is too high, it may be difficult to form a layer made of the polyvinyl acetate resin composition.
• the viscosity average polymerization degree of the polyvinyl alcohol resin is Is preferably 1 800 or less, more preferably 1600 or less, further preferably 1300 or less, even more preferably 1100 or less, and particularly preferably 1100 or less.
• the preferable value of the viscosity average degree of polymerization of the polyvinyl acetal resin is the same as the preferable value of the preferable viscosity average degree of polymerization of the polyvinyl alcohol resin.
• the degree of saponification of the polyvinyl alcohol resin is not less than the lower limit, the transparency and heat resistance of the resin tend to be excellent, and the reactivity with aldehyde becomes good.
• the degree of saponification is more preferably 95 mol% or more.
• the viscosity average degree of polymerization and the degree of saponification of the polyvinyl alcohol-based resin can be measured based on, for example, "" 3 ⁇ 6 7 2 6 "Polyvinyl alcohol test method".
• an aldehyde having 1 to 12 carbon atoms is preferable.
• the number of carbon atoms of the aldehyde is within the above range, the reactivity of acetalization is good, and the resin is blocked during the reaction. ⁇ 2020/175 178 12 ⁇ (:171? 2020 /005739
• the aldehyde is not particularly limited, and examples thereof include formaldehyde, acetaldehyde, propionaldehyde, _butyraldehyde, isoptyl aldehyde, valeraldehyde, Hexyl aldehydes, 2-ethylputyl aldehydes, door-heptyl aldehydes, door octyl aldehydes, n-nonyl aldehydes, door decyl aldehydes, benzaldehyde and cinnamaldehyde, and other aliphatic, aromatic or alicyclic aldehydes.
• n _ butylamine aldehyde is particularly preferred.
• the above aldehydes may be used alone or in combination of two or more.
• polyfunctional aldehydes and aldehydes having other functional groups may be used in a small amount within the range of 20% by mass or less of the total aldehydes.
• the polyvinyl acetal resin is most preferably a polyvinyl propyl resin.
• the polyvinyl butyral resin it is possible to use a polyvinyl alcohol polymer obtained by saponifying a copolymer of a vinyl ester and another monomer, which is obtained by ptyralizing a polyvinyl alcohol-based polymer with butyl aldehyde. it can.
• the other monomer mentioned above include ethylene, propylene, and styrene.
• a monomer having a hydroxyl group, a carboxy group or a carboxylate group can be used.
• the polyvinyl acetal resin composition of the present disclosure may also contain, as a resin component, a resin other than the polyvinyl acetal resin.
• a resin component a resin other than the polyvinyl acetal resin.
• the content of the polyvinyl acetal resin in the polyvinyl acetal resin composition is preferably 40% by mass or more, more preferably 50% by mass or more, and more preferably The amount is 60% by mass or more, particularly preferably 80% by mass or more, and most preferably 90% by mass or more.
• Polyvinyl acetal The content of the polyvinyl acetal resin in the resin composition is 95% by mass or more. ⁇ 2020/175 178 13 ⁇ (: 171? 2020/005739
• 98 mass% or more, 99 mass% or more, 99.9 mass% or more or 99.99 mass% or more may be preferable.
• the polyvinyl acetal resin composition of the present disclosure contains, in addition to the above-mentioned plasticizer and polyvinyl acetal resin, an adhesive strength adjusting agent disclosed in, for example, WO 03/0 3 3 5 8 3. May be.
• Polyvinyl acetal resin When the composition contains an adhesion modifier, the polyvinyl acetal resin composition contains one or more magnesium salts selected from the group consisting of magnesium salts of carboxylic acids having 2 to 12 carbon atoms. It is preferable. This magnesium salt preferably acts as an adhesive force adjusting agent for adjusting the adhesiveness with glass.
• magnesium acetate which is commonly used, is also preferably used, but on the wall inside the film forming apparatus (for example, on the wall inside the extruder, on the inner wall of the extrusion die and/or on the inner wall of the die lip). From the viewpoint that the formation of the white layer in (3) is easily suppressed, it is preferable to use a magnesium salt of a carboxylic acid having 6 to 12 carbon atoms.
• Examples of the carboxylic acid having 6 to 12 carbon atoms include hexanoic acid, 2-ethylbutanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, 2-ethylhexanoic acid, 2-ethylbutyric acid.
• the optimum addition amount depends on the plasticizer used, the type of the adhesion control agent added, or the type of the resin layer to be laminated.
• the content of magnesium ions derived from the magnesium salt of rurubonic acid with respect to the total mass of the polyvinyl acetal resin composition is preferably 1 to 4200, more preferably 2 to 300, and further preferably 3 to 1. It is 0 0 0 1.
• one or more kinds of additives such as modified silicone oil or organic acids may be used in addition to the magnesium salt or in place of the magnesium salt.
• modified silicone oils include epoxy-modified silicone oils, ether-modified silicone oils, ester-modified silicone oils, amine-modified silicone oils and carboxyl-modified silicones as shown in Japanese Patent Publication No. 5-2995/90.
• examples include oil.
• the organic acid include at least one organic acid having 4 to 30 carbon atoms, as disclosed in JP-A No. 2017-1710.
• the polyvinyl acetal resin composition of the present disclosure further requires, as other components, an antioxidant, an ultraviolet absorber, a light stabilizer, an antiblocking agent, a pigment, a dye, a functional inorganic compound, a heat shielding material, or the like. It may be contained according to.
• antioxidants include phenol-based antioxidants, phosphorus-based antioxidants, and sulfur-based antioxidants.
• the addition amount of the antioxidant is preferably 0.001 part by mass or more, more preferably 0.01 part by mass or more, and preferably 5 with respect to 100 parts by mass of the polyvinyl acetal resin. It is not more than 1 part by mass, more preferably not more than 1 part by mass. When the amount of the antioxidant is not less than the lower limit and not more than the upper limit, a sufficient antioxidant effect can be imparted.
• UV absorber examples include benzotriazole UV absorbers, hindered amine UV absorbers, benzoate UV absorbers, triazine compounds, benzophenone compounds, malonate compounds, indole compounds, Examples thereof include anilide oxalate compounds.
• the ultraviolet absorbers may be used alone or in combination of two or more.
• the amount of the ultraviolet absorber added is, on a mass basis with respect to the polyvinyl acetal resin, preferably 10 or more, more preferably 100 or more, and preferably 50, 00 or less, It is preferably 10 or 0 or less.
• the addition amount of the ultraviolet absorber is within the range of the lower limit value and the upper limit value described above. ⁇ 2020/175178 15 ⁇ (: 171-1?2020/005739
• Examples of the light stabilizer include hindered amine light stabilizers and the like.
• thermoelectric material By including a heat-shielding material, it is possible to impart a heat-shielding function to the interlayer film for laminated glass and reduce the transmittance of near-infrared light having a wavelength of about 1500 n when it is made into a laminated glass. it can.
• the heat-shielding material is preferably tin-doped indium oxide, antimony-doped tin oxide, zinc antimonate, metal-doped tungsten oxide, diimonium dye, aminium dye, phthalocyanine dye, anthraquinone.
• the content thereof is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and further preferably 0.01% by mass or more, It is particularly preferably 0.2% by mass or more, preferably 5% by mass or less, and more preferably 3% by mass or less.
• the heat-shielding material may be included in any of the eight layers and the Mitsumi layer included in the interlayer film for laminated glass described below, and the above-mentioned “content” means the tree and the Mitsumi layer. It means the amount when the total mass of all the fat material or resin composition is 100 mass %.
• the “content” of the organic dye compound described later has the same meaning.
• the wavelength of about 1 is obtained without affecting the visible light transmittance of the laminated glass using the obtained interlayer film. It is easy to effectively reduce the transmittance of near infrared light of 5 0 0 n ⁇ !.
• the average particle size of the heat ray-shielding particles is preferably 100 or less, and more preferably 50 n or less.
• the average particle diameter is an average particle diameter measured by a laser diffractometer.
• an organic dye compound When used as the heat-shielding material, its content is preferably 0.001 mass% or more, more preferably 0.005 mass% or more, and further preferably. ⁇ 2020/175178 16 ⁇ (: 171-1?2020/005739
• the content of the organic dye compound is within the range of the lower limit value and the upper limit value described above, the wavelength of about 150° C. is exerted without affecting the visible light transmittance of the laminated glass using the obtained interlayer film. 0 It is easy to effectively reduce the near-infrared light transmittance of.
• the thickness of each of the Mimi layers is preferably 1
• the thickness of the Mimi layer is equal to or more than the above lower limit, it is easy to impart appropriate bending rigidity to the interlayer film, and it is easy to suppress deterioration of sound insulation in a high frequency range, and it is possible to prevent the Mimi layer from sufficiently absorbing glass. Adhesiveness is easily expressed.
• the thickness of the mimi layer is less than or equal to the above upper limit, the thickness of the interlayer film for laminated glass does not become too thick, which is advantageous for reducing the weight of the laminated glass.
• their thickness may be the same or different.
• the thicknesses of the plurality of mound layers are different, it is preferable that the thickness of at least one mimi layer is within the above-mentioned preferred range. Thickness can be measured with a thickness gauge.
• the hygroscopicity of the interlayer film is preferably low from the viewpoint of the adhesiveness to glass and the adhesion controllability.
• the interlayer film of the present disclosure includes at least one eight layer and at least one layer, and the eight layer is a thermoplastic resin containing a hydrophobic resin (hydrogenated aromatic vinyl-conjugated gen-based block copolymer) as a resin component. Since it is composed of a resin material, the hygroscopicity of the interlayer film depends largely on the hygroscopicity of the Mitsumi layer, not on the eight layers.
• the polyvinyl acetal resin composition constituting the mimi layer has low hygroscopicity.
• the sheet-shaped polyvinyl acetal resin composition having a thickness of 500, the moisture content at the time of humidity conditioning at 20° ⁇ and a relative humidity of 20% for 48 hours is preferably ⁇ 0.45 mass% or less. It is preferably 0.35 mass% or less, and the moisture content when humidity is adjusted at 20 ° ⁇ and relative humidity 65% for 48 hours is preferably 1.8 mass% or less.
• the content is preferably 1.65% by mass or less, and more preferably 1.45% by mass or less.
• the water content can be adjusted to be equal to or lower than the upper limit value by selecting a plasticizer.
• the water content can be measured by the method described in Examples below.
• the thermoplastic resin material forming the layer is made of a thermoplastic resin or a resin composition containing a thermoplastic resin.
• the thermoplastic resin material forming the eight layers contains, as a thermoplastic resin, a polymer block ( 3 ) containing an aromatic vinyl monomer unit of 60 mol% or more and a conjugated diene monomer unit of 60 mol% or more. It contains a hydrogenated product of a block copolymer having a polymer block (10) (hereinafter also referred to as “block copolymer (8)”), and the weight of the block copolymer in the hydrogenated product is increased.
• the content of the combined block (3) is 25 mass% or less based on the total mass of the hydrogenated product of the block copolymer.
• the aromatic vinyl compound constituting the aromatic vinyl monomer units such as styrene, ⁇ - methyl styrene, 01-methyl styrene, _ methylstyrene, ⁇ 3 ⁇ 4 _ methylstyrene, / 3-methylstyrene, 2 , 6-dimethylstyrene, indene, vinylnaphthalene and the like.
• the aromatic vinyl compounds may be used alone or in combination of two or more. Of these, styrene, ⁇ -methylstyrene, _methylstyrene and mixtures thereof are preferable, and styrene is more preferable, from the viewpoint of production cost and physical property balance.
• the content of the aromatic vinyl monomer unit in the polymer block (3) is 60 mol% or more, preferably 80%, based on all the constitutional units constituting the polymer block (3). Mol% or more, more preferably 85 mol% or more, further preferably 90 mol% or more, particularly preferably 95 mol% or more, and may be substantially 100 mol%.
• the content of the aromatic vinyl monomer unit in the polymer block (8) is at least the above lower limit, good moldability or mechanical strength is obtained. ⁇ 2020/175 178 18 ⁇ (:171? 2020 /005739
• the polymer block (3) contains a structural unit derived from an unsaturated monomer other than the aromatic vinyl monomer unit, as long as the object and effects of the present disclosure are not impaired. Good.
• unsaturated monomers include, for example, butadiene, isoprene, 2,3-dimethylbutadiene, 1,3-pentadiene, 1,
• Examples include 3-hexagen, isoptylene, methyl methacrylate, methyl vinyl ether, 1 ⁇ ! _ vinylcarbazole, /3-pinene, 8, 9 _ _ menthen, dipentene, methylene norbornene and 2-methylene tetrahydrofuran.
• the content of the other unsaturated monomer unit in the polymer block (8) is less than 40 mol%, preferably less than 40 mol% based on all the constituent units constituting the polymer block (3). It is less than 20 mol%, more preferably less than 15 mol%, further preferably less than 10 mol%, particularly preferably less than 5 mol%.
• the polymer block (3) is substantially free of the other unsaturated monomer unit described above.
• the bonding form thereof is not particularly limited, and may be random or tapered.
• the content of the aromatic vinyl monomer unit and the content of the other unsaturated monomer unit in the polymer block (3) in the block copolymer (8) are determined by the block copolymer. determined from the 1 1 ⁇ 1 _ IV! spectrum can be adjusted to the desired content by adjusting the charge ratio of monomers in the preparation of the block copolymer (eight).
• the block copolymer (8) may have at least one polymer block (8).
• those polymer blocks (3) may be the same or different from each other.
• “different polymer blocks” means that the monomer units constituting the polymer block, the weight average molecular weight, the stereoregularity, and, when having a plurality of monomer units, each monomer Body unit ratio and co-weight ⁇ 2020/175 178 19 ⁇ (:171? 2020/005739
• the weight average molecular weight of the polymer block (8) contained in the block copolymer (8) is not particularly limited.
• the weight average molecular weight of at least one polymer block (8) among the polymer blocks contained in the block copolymer () is preferably 3,00 0 to 60 0,00 0, more preferably 4, It is 0 0 0 to 5 0, 0 0 0.
• the weight average molecular weight is a polystyrene equivalent weight average molecular weight obtained by gel permeation chromatography ( ⁇ ) measurement.
• the glass transition temperature of the polymer block (3) is preferably 1 2 0 ° ⁇ below, yo Ri preferably at 1 1 0 ° ⁇ less, preferably 6 0 ° ⁇ As, more preferably 7 0 ° ⁇ or more.
• the glass transition temperature of the polymer block (3) is measured by the method described in Examples below, and adjusted to a desired range by adjusting the charging ratio of each monomer in the preparation of the block copolymer (). it can.
• the content of the polymer block (3) in the hydrogenated product of the block copolymer () [When a plurality of polymer blocks (3) are present, their total content] is a block copolymer (). 25% by mass or less based on the total mass of the hydrogenated product. Depending on the morphology of the block copolymer (8) 3 The value of 5 also changes, especially when a microphase-separated structure consisting of a sphere structure is adopted. 5 tends to be higher.
• the content of the polymer block (3) in the hydrogenated product of the block copolymer () greatly affects the ease of forming the sphere structure. ⁇ 2020/175 178 20 ⁇ (:171? 2020 /005739
• the content of the block copolymer (3) with respect to the total mass of the hydrogenated product of the block copolymer () is 25 mass% or less, preferably 20 mass% or less, more preferably 15 mass% or less.
• the adjustment is very advantageous for further improving the sound insulation of the obtained interlayer film.
• the content of the polymer block (3) described above is more preferably 14% by mass or less, more preferably 13% by mass or less, more preferably 12.5% by mass or less, and more preferably 11% by mass. Hereafter, it is particularly preferably 9% by mass or less. From the viewpoint of sound insulation, the content of the polymer block (3) is preferably 3% by mass or more, more preferably 3.5% by mass or more.
• the content of the polymer block (3) described above is preferably 3 to 25% by mass.
• the content of the above-mentioned polymer block (3) is preferably 6 to 25% by mass, more preferably 8 to 25% by mass, especially from the viewpoint of easily improving the handling property and mechanical properties of the eight layers. It is preferably from 10 to 25% by mass.
• the content of the polymer block (3) described above is preferably 3.5 to 25% by mass, more preferably 4 to 15% by mass.
• the content of the polymer block (3) in the hydrogenated product of a block copolymer (eight) is 1 1 to 1 _ 1 ⁇ / a hydrogenated product of a block copolymer ()
• conjugated diene compound that constitutes the conjugated gen monomer unit contained in the polymer block (well)
• conjugated diene compound that constitutes the conjugated gen monomer unit contained in the polymer block (well)
• conjugated gen compound examples thereof include 3-dimethyl-1,3-butadiene, 1,3-pentadiene and myrcene.
• the conjugated gen compound may be used alone,
• the conjugated gen compound a mixture of butadiene and isoprene may be used.
• the mixing ratio [isoprene/butadiene] (mass ratio) is not particularly limited, but is preferably 5/95 to 95/5, more preferably 10/90 to 90/10, and further preferably 40/60 to 70/30, and particularly preferably 45/5 5 to 65/35.
• the mixing ratio [isoprene/butadiene] is expressed in terms of molar ratio, it is preferably 5/95 to 95/5, more preferably 10/9 ⁇ to 90/10, further preferably 40/60 to 70/. 30, particularly preferably 45/55 to 55/45.
• the content of the conjugated diene monomer unit in the polymer block (distance) is 60 mol% or more, preferably 65 mol% or more, based on all the constitutional units constituting the polymer block (distance). It is preferably 80 mol% or more.
• the upper limit of the content of the synergistic gen monomer unit is not particularly limited.
• the content of conjugated gen monomer units may be 100 mol %.
• the polymer block (13) may have only constituent units derived from one kind of conjugated gen compound, or may have constituent units derived from two or more kinds of conjugated gen compound. Good. As described above, in the present disclosure, the polymer block (well) contains the conjugated diene monomer unit in an amount of 60 mol% or more.
• a polymer block is a constitutional unit derived from isoprene (hereinafter sometimes abbreviated as “isoprene unit”), a constitutional unit derived from butadiene (hereinafter referred to as “butadiene gene unit”) May be abbreviated as "), or the total amount of isoprene units and butadiene units is preferably 60 mol% or more in each case. This makes it easy to obtain an interlayer film having excellent sound insulation.
• the polymer block (shallow) has two or more types of conjugated gen monomer units, their bond forms are random, tapered, completely alternating, partially blocky, block, or two types thereof. Any of the above combinations may be used. ⁇ 2020/175 178 22 ⁇ (:171? 2020 /005739
• the polymer block (10) contains a constituent unit derived from another polymerizable monomer other than the conjugated gen monomer unit, as long as the object and effects of the present disclosure are not impaired. May be.
• Other polymerizable monomers include, for example, styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, 111 _methylstyrene, _methylstyrene, _1:-butylstyrene, 2,4-dimethylstyrene, vinylnaphthalene and vinyl.
• Aromatic vinyl compounds such as anthracene, as well as methyl methacrylate, methyl vinyl ether, 1 ⁇ 1-vinylcarbazole, -Pinene, 8, 9-menthene, dipentene, methylenenorbornene, 2-methylethylenetetrahydrofuran, 1,3-cyclopentadiene, 1,3-cyclohexagen, 1,3-cycloheptagene and 1,3-cyclo.
• Examples include octagen. Among them, styrene, ⁇ -methylstyrene and methylstyrene are preferable, and styrene is more preferable.
• the polymer block (swell) contains the other polymerizable monomer unit described above, specific combinations thereof are preferably isoprene and styrene, butadiene and styrene, and more preferably isoprene and styrene. It is styrene.
• the thermoplastic resin material forming the layer may have a high 13 n 5 content.
• the content of the other polymerizable monomer unit in the polymer block () is less than 40 mol%, preferably 35 mol, based on all the constituent units constituting the polymer block (10). %, and more preferably less than 20 mol %.
• the bonding form thereof is not particularly limited and may be random or tapered.
• the content of the conjugated diene monomer unit and the content of the other polymerizable monomer unit in the polymer block (13) in the block copolymer (8) are as follows. 1 1 to 1 — IV! spectrum, and can be adjusted to a desired content by adjusting the charging ratio of each monomer in the preparation of the block copolymer (8).
• the structural unit that constitutes the polymer block (distance) is an isoprene unit or a pig. ⁇ 2020/175 178 23 ⁇ (:171? 2020 /005739
• butadiene can be a 4-bond or a 1,4-bond, and the bond form of butadiene is 1,2-bond or 1,4-bond.
• the total content of 3, 4-bond units and 1, 2 _ bond units (hereinafter sometimes referred to as "vinyl bond amount”) in the polymer block (13) in the block copolymer () is It is preferably 20 mol% or more, more preferably 40 mol% or more, and particularly preferably 50 mol% or more. Further, although not particularly limited, the total amount of vinyl bonds described above is preferably 90 mol% or less, more preferably 85 mol% or less.
• the vinyl bond content is dissolved block copolymer before hydrogenation of (eight) in thousand ⁇ 3 1 Calculated by measuring the spectrum.
• the structural units that make up the polymer block consist of only isoprene units
• the ratio of the total peak area of isoprene units to the peak areas corresponding to 3, 4-bond units and 1, 2-bond units The vinyl bond content is calculated.
• the structural unit constituting the polymer block (13) is composed only of a butadiene unit
• the vinyl bond amount is calculated from the ratio of the total peak area of the butadiene unit and the peak area corresponding to the 1,2-bond unit.
• the constitutional units constituting the polymer block (b) include isoprene and butadiene units
• the vinyl bond amount is calculated from the ratio of the peak area corresponding to the 1,2-bond unit in the butadiene unit.
• the vinyl bond amount increases, the value of 13 n 5 of the thermoplastic resin material forming the layer tends to increase. By controlling the position of the 5 peak within a specific temperature range, the sound insulation of the resulting interlayer film can be improved.
• the vinyl bond amount can be adjusted in a desired range by adjusting the addition amount of the organic Lewis base used in the anion polymerization for producing the block copolymer (8).
• the amount is preferably 15,000 to 800,000, more preferably 50,000 to 700,000, further preferably 70,000 to 600,000 in a state before hydrogenation. Particularly preferred is 90,000 to 500,000, and most preferred is 1 30,000 to 450,000.
• the weight average molecular weight is the polystyrene-equivalent weight average molecular weight obtained by gel permeation chromatography _ ( ⁇ ⁇ ) measurement, and the weight average molecular weight of the polymer block () is the polymer block (). It means a value calculated from the difference in weight average molecular weight before and after copolymerization.
• the glass transition temperature of the polymer block (deposit) is preferably 10 ° ⁇ or less, more preferably 0 ° ⁇ or less, preferably 1 30 ° ⁇ or more, more preferably 1 20 ° ⁇ or more. Is.
• the glass transition temperature of the polymer block (slag) is measured by the method described in the Examples below, and adjusted to a desired range by adjusting the charging ratio of each monomer in the preparation of the block copolymer (). it can.
• the block copolymer (8) may have at least one polymer block (13).
• those polymer blocks (swells) may be the same or different from each other.
• the content of the polymer block (13) in the hydrogenated product of the block copolymer () is a block copolymer It is preferably 75 to 97 mass% with respect to the total mass of the hydrogenated product in ().
• the hydrogenated product of the block copolymer () tends to have appropriate flexibility or good moldability.
• the morphology of the hydrogenated product of block copolymer (8) causes I 3
• the value of 5 also changes, especially when a microphase-separated structure consisting of a sphere structure is adopted. 5 tends to be high. Formation of sphere structure ⁇ 2020/175178 25 ⁇ (:171? 2020 /005739
• the content of the polymer block (b) in the hydrogenated product of the block copolymer (8) is very advantageous to further improve the sound insulation of the resulting interlayer film by adjusting the content of () to preferably 75 to 97% by mass.
• the content of the polymer block (10) described above is more preferably 75 to 96.5% by mass, further preferably 85 to 96% by mass, and particularly preferably 90 to 96% by mass. ..
• the content of the polymer block (10) is preferably 75 to 94% by mass, more preferably 75 to 9% by mass.
• the content of the above-mentioned polymer block (10) is 75 to 96.5% by mass, and the content of the polymer block (13) is within this range. If it is inside, it is possible to improve the handleability and mechanical properties of the obtained eight layers while ensuring high sound insulation.
• the content of the polymer block (distance) in the hydrogenated product of the block copolymer (8) is from 1 1 to 1 _ 1 ⁇ /
• the bonding form is not limited, and may be linear, branched, radial, Alternatively, any of the binding forms obtained by combining two or more of these may be used.
• the bond form between the polymer block (3) and the polymer block (13) is a straight chain, and for example, the polymer block (3) is eight and the polymer block (13) is Is represented by, the diblock copolymer represented by Examples thereof include triblock copolymers, tetrablock copolymers represented by 8_Mimiichihachi_Mitsumi, and pentablock copolymers represented by 8_Mimi_Hachimi_8.
• a linear triblock copolymer or a diblock copolymer is preferable, and an 8____8 type triblock copolymer is preferably used from the viewpoints of flexibility and ease of production. ⁇ 2020/175 178 26 ⁇ (: 171? 2020 /005739
• the layer comprises, as a thermoplastic resin, one or more hydrogenated products of the block copolymer (8) [hereinafter, also referred to as "hydrogenated block copolymer ()"]. It is preferable to contain.
• 80 mol% or more of the carbon-carbon double bonds of the polymer block (slung) are hydrogenated (hereinafter sometimes abbreviated as “hydrogenation”).
• 85 mol% or more is more preferably hydrogenated
• 88 mol% or more is more preferred
• 90 mol% or more is particularly preferred.
• this value may be referred to as "hydrogenation rate").
• the hydrogenation rate may be 99 mol% or less, and may be 98 mol% or less.
• the hydrogenation rate is the carbon-carbon content of the conjugated gen monomer unit in the polymer block (). It is a value calculated from the content and calculated from the content.
• the weight average molecular weight of the hydrogenated block copolymer (8) determined by gel permeation chromatography in terms of standard polystyrene is preferably 15,000 to 800,000, more preferably 50,000 to 700,000, more preferably 70,000 to 600,000, particularly preferably 90,000 to 500,000, most preferably 1 30,000 to 450,000.
• weight average molecular weight of the hydrogenated block copolymer () is at least the above lower limit, heat resistance tends to be high, and when it is at most the above upper limit, moldability tends to be good.
• the method for producing the block copolymer (8) is not particularly limited.
• the block copolymer () can be produced by, for example, an anionic polymerization method, a cationic polymerization method or a radical polymerization method.
• the 1,2-bonding amount and the 3,4-bonding amount of the block copolymer (8) are increased by adding an organic Lewis base during anionic polymerization.
• the amount of 1,2-bonding and 3,4-bonding of the block copolymer (8) can be adjusted by adjusting the addition amount of the organic Lewis base, that is, ⁇ 2020/175 178 27 ⁇ (:171? 2020 /005739
• the amount of vinyl bonds can be easily controlled. As the vinyl bond amount increases, the value of 13 n 3 in the thermoplastic resin material forming the eight layers tends to increase.By controlling the position of the peak of 35 within a specific temperature range, the intermediate The sound insulation of the film can be improved.
• the hydrogenated block copolymer () can be obtained by subjecting the block copolymer (/ ⁇ ) to a hydrogenation reaction.
• the method for subjecting the unhydrogenated block copolymer () to the hydrogenation reaction include, for example, isolating the unhydrogenated block copolymer () from the reaction solution containing the produced block copolymer (8). , A method in which it is dissolved in a solvent inert to the hydrogenation catalyst, or the unhydrogenated block copolymer () in the reaction solution is reacted with hydrogen in the presence of a hydrogenation catalyst. Is mentioned.
• the hydrogenation rate is preferably 80 mol% or more, more preferably 85 mol% or more, further preferably 88 mol% or more, and particularly preferably 90 mol% or more.
• thermoplastic resin material forming the layer is "
• the maximum peak of 1 3 n 3 measured by performing a complex shear viscosity test under the condition of a frequency of 1 to 1 is 1 30° ⁇ or more and 1 ⁇ ° ⁇ or less (Hereinafter, this temperature may be referred to as “I 3 n 5 peak temperature”), and the I 3 5 Peak height (hereinafter referred to as “I 3 It is sometimes called “5 peak height”) is 1.5 or more.
• the I 3 n 5 peak temperature of the thermoplastic resin material forming the eight layers included in the interlayer film for laminated glass of the present disclosure is preferably 1 30 ° ⁇ or more, more preferably 1 25 ° ⁇ or more. , And more preferably 1° 20° or more. I an 8 If the peak temperature is above the lower limit, 5000 It is easy to obtain good sound insulation in the frequency range of 0000! Meanwhile, 1 3 n 5 peak temperature preferably 10 ° ⁇ hereinafter, more preferably ⁇ ° ⁇ or less, more preferably one 5 ° ⁇ below. If the tan 8 peak temperature is below the upper limit, 2000 From 5000 It is easy to obtain good sound insulation in the middle frequency range.
• tan 8 peak temperature is within the range of the lower limit value and the upper limit value described above, 2000 to 1000 Good sound insulation in the frequency range up to 0 Hz is likely to be brought about.
• tan S is also called loss tangent, and is the shear loss elastic modulus divided by the shear storage elastic modulus. The higher this value, the higher the sound insulating property is expected. Tan 5 is measured by the method described in Examples below.
• the thermoplastic resin material forming the layer A contains the hydrogenated product of the block copolymer (A) as the thermoplastic resin
• the block copolymerization In the polymer (A) the content of the polymer block (a) which is a hard segment is adjusted, and the polymer block (a) which is a hard segment or the polymer block (b) which is a soft segment is constituted.
• Examples include a method of adjusting the type of the monomer, the bonding form, the glass transition temperature of each segment itself, and the like.
• the content of the polymer block (a) in the block copolymer (A) should be reduced, or the type or combination of the monomers constituting the polymer block (b) should be changed.
• the tan 5 peak temperature can be adjusted (increased) by increasing the amount of vinyl bonds, etc.
• the t an S peak height is preferably 1.5 or more, more preferably 2.0 or more, further preferably 2.2 or more, and particularly preferably 2.4 or more.
• the upper limit of t a n 5 peak height is not particularly limited.
• the height of t a n 5 peak is usually less than 5.0.
• thermoplastic resin material forming the A layer contains a hydrogenated product of the block copolymer (A) as a thermoplastic resin
• a micro phase is used as a method for increasing the tan S peak height.
• the separation structure may be a sphere structure, and the amount of vinyl bonds in the polymer block (b) may be increased.
• thermoplastic resin material constituting the A layer is preferably such that the hydrogenated block copolymer (A) as a thermoplastic resin is contained in an amount of 60 mass% with respect to the total mass of the thermoplastic resin material. Or more, more preferably 70 mass% or more, and further preferably 80 mass% or more. Content of the hydrogenated block copolymer (A) in layer A ⁇ 2020/175 178 29 ⁇ (: 171? 2020 /005739
• thermoplastic resin material forming the eight layers may include other thermoplastic resins (if necessary), as long as the effect of the present disclosure is not impaired.
• additives such as crystal nucleating agents; hydrogenated coumarone-indene resins, hydrogenated rosin-based resins, hydrogenated terpene resins, hydrogenated resins such as alicyclic hydrogenated petroleum resins; olefin and diolefin polymers
• a tackifying resin such as an aliphatic resin; hydrogenated polyisoprene, hydrogenated polybutadiene, butyl rubber, polyisobutylene, polybutene, polyolefin elastomer, specifically ethylene-propylene copolymer, ethylene-propylene copolymer, propylene Butylene copolymer, polyolefin resin, olefin polymer, polyethylene resin, etc.).
• the thermoplastic resin material forming the layer comprises the hydrogenated block copolymer () as a thermoplastic resin.
• interlayer film for laminated glass of the present disclosure eight layers and one layer preferably have a thickness of 1
• the optimum thickness of the eight layers depends on the thickness of the other layers (for example, the above-mentioned Mimi layer) or the storage elastic modulus of each layer that constitutes the interlayer film, but the thicker the layer, the higher the sound insulation. Therefore, the storage elastic modulus of the whole interlayer tends to decrease.
• the thickness of the eight layers 1 layer is thicker than 4 0 0 tends frequency range of occurrence of coincidence effect of the laminated glass is higher than 6 0 0 0 1 ⁇ 1 ⁇ , 6 0 0 0 1 ⁇ 1 2
• the decrease in sound insulation in the above frequency range may become noticeable.
• the thickness of each of the eight layers and one layer is more preferably 350 or less, and particularly preferably 300 or less.
• the thickness of the eight layers is less than 100, in addition to lowering the sound insulation, the storage elastic modulus of the entire interlayer increases, and the frequency range in which the coincidence effect occurs becomes the middle frequency range.
• the thickness of each of the eight layers and one layer is more preferably 120 or more, and particularly preferably 150 or more, because the thickness decreases as the value decreases.
• the total thickness of the plurality of layers is preferably 950 or less, more preferably 750 or less.
• the respective thicknesses of the plurality of eight layers may be the same or different. When the plurality of eight layers have different thicknesses, it is preferable that the thickness of at least one eight layer is within the above-mentioned preferable range. The thickness can be measured with a thickness meter. Further, the plurality of eight layers may be made of the same thermoplastic resin material or may be made of different thermoplastic resin materials.
• thermoplastic resin material forming the eight layers may further include an antioxidant, an ultraviolet absorber, a light stabilizer, an antiblocking agent, a pigment, a dye or a heat shield material as other components as necessary. It may be added.
• the antioxidant the ultraviolet absorber, the light stabilizer, the heat shield material, and the like
• the same materials as those described in the above description of the polyvinyl acetal resin composition can be used.
• the suitable agent or material may be the same as or different from the suitable agent or material in the polyvinyl acetate resin composition.
• Examples of the antiblocking agent include inorganic particles and organic particles.
• Examples of the inorganic particles include oxides of the elements of Group 8, Group II, Group 18, Group VI, Group VII, Group VIII, Group I, Group II, Group 11 and Group IV and group IV elements. Hydroxides, sulfides, nitrites, halides, carbonates, sulfates, acetates, phosphates, phosphites, organic carboxylates, silicates, titanates, borates and them Water-containing compounds, and complex compounds and natural mineral particles containing them as the main component.
• the main component is a component having the highest content.
• Examples of the organic particles include fluororesins, melamine-based resins, styrene-divinylbenzene copolymers, acrylic resin silicones and cross-linked products thereof.
• these additives are selected from the group consisting of one or a plurality of eight layers and one or a plurality of Mitsumi layers. ⁇ 2020/175178 31 ⁇ (: 171-1? 2020/005739
• the additive When the additive is contained in two or more layers selected from the above group, the same additive may be contained in those layers, or different layers may be contained.
• the method for producing the interlayer film for laminated glass of the present disclosure is not particularly limited.
• a polyvinyl acetal resin composition forming the layers is uniformly kneaded, and then a known film-forming method (for example, extrusion method, calender method, Fabricate by forming the Mami layer by the pressing method, casting method or inflation method), and by making eight layers from the thermoplastic resin material that constitutes the layer by the same method, and stacking these by press molding, etc.
• a known film-forming method for example, extrusion method, calender method, Fabricate by forming the Mami layer by the pressing method, casting method or inflation method
• it may be produced by coextruding the Mitsumi layer, the eight layers and other necessary layers.
• the interlayer film for laminated glass of the present disclosure has a configuration having a plurality of eight layers, and when there are layers sandwiched between the eight layers, for example, a configuration in which a Mimi layer is laminated on both surfaces of the eight layers 2 or more of the interlayer film may be used, and the interlayer film is prepared by uniformly kneading the polyvinyl acetal resin composition constituting the layer and then forming the layer by the publicly known film forming method described above.
• eight layers may be prepared from the thermoplastic resin material constituting the layers in the same manner, and these may be laminated by press molding or the like, or by coextruding the Mitsumi layer, the eight layers and other necessary layers. You may produce.
• an interlayer film for a laminated glass by laminating the above-mentioned two or more interlayer film and the third layer ( ⁇ layer) according to the method for producing laminated glass described later. it can. This laminating may be performed at the same time as laminating the laminated glass with the outermost glass.
• the third layer may be further used.
• ⁇ layers, contact with ⁇ layers, or an interlayer film of a structure in which 8 layers and Mimi layers are laminated on both sides in contact with ⁇ layers for example, Mimi/8 layers/ ⁇ layers/eight layers/Mimi layers. It is sufficient to use an interlayer film having a structure in which Mimi layer/eight layers/Mimi layer are sequentially laminated on both sides (for example, Mimi layer/eight layers/Mimi layer/0 layer/Mimi layer/eight layers/Mimi layer).
• Mimi layer/eight layers/Mimi layer/0 layer/Mimi layer/eight layers/Mimi layer for example, Mimi layer/eight layers/Mimi layer/0 layer/Mimi layer/eight layers/Mimi layer.
• It may be laminated after forming the film, or may be produced by coextruding eight layers, Mitsumi layer, O layer and other necessary layers.
• Resin temperature during extrusion temperature of the resin material or resin composition
• Resin temperature of the resin material or resin composition preferably 1 5 0 ° ⁇ As more preferable properly is a 1 7 0 ° ⁇ As, preferably 2 5 0 ° ⁇ less, more preferably Is less than 230 ° ⁇ .
• the resin temperature during extrusion is within the range of the lower limit value and the upper limit value described above, the resin or the like contained in the resin material or the resin composition is less likely to be decomposed, and thus the resin or the like is less likely to be deteriorated.
• the discharge is easy to stabilize.
• each of the eight layers and the one layer is as described above.
• the laminated structure of the interlayer film for laminated glass can be appropriately determined depending on the purpose.
• Mimi/8 layers/Mimi as shown in Fig. 1, Mimi/Miya/Mimi/Miya, or Mimi/8M/Mimi/Miya/ It may have a laminated structure of a Mitsumi layer. Therefore, in one embodiment of the present disclosure, the interlayer film for laminated glass comprises eight layers and Mimi layers in the order of Mimi layer/eight layers/Mimi layer/eight layers/Mimi layer. Further, the structure may be such that two sets of interlayer films are sandwiched between three pieces of glass.
• the eight layers in the present disclosure can impart sound insulation to the laminated glass.
• a layer that imparts sound insulation may have a low glass transition temperature and have stickiness. Therefore, from the viewpoint of handleability of an intermediate film, when eight layers are layers that impart sound insulation, eight layers are Mimi layers.
• the sandwiched structure is preferable.
• the interlayer film for laminated glass is laminated with the eight layers having a thickness of 100 or more and 400 or less, and on both sides of the eight layers, The one layer has a thickness of not less than 200 and not more than 1500.
• the components constituting each of the eight layers, the Miwa layer and the O layer may be the same or different from each other. ⁇ 2020/175178 33 ⁇ (: 171-1?2020/005739
• the thickness may be different.
• the O layer that may be included in the interlayer film for laminated glass of the present disclosure may be a layer that includes a known resin as a resin component.
• the resin contained in ⁇ layer for example, port Riechiren, polypropylene, polyvinyl chloride, polystyrene, polyvinyl acetate vinyl-polyurethane, polytetrafluoroethylene, acrylic resins, polyamide Mi de, polyacetal _ Le, polycarbonate _ Bonnet _ Bok , Polyester terephthalate, Polyethylene terephthalate, Cyclic polyolefin, Polyphenylene sulfide, Polytetrafluoroethylene, Polysulfone, Polyethersulfone, Polyarylate, Liquid crystal polymer, Polyimide, Styrene thermoplastic elastomer, Ethylene-vinyl acetate copolymer, polymethacrylic acid, or poly(meth)acrylic acid ester, ethylene-(meth)acrylic
• the layer may contain additives such as a plasticizer, an antioxidant, an ultraviolet absorber, a light stabilizer, an antiblocking agent, a pigment, a dye, and a heat shield material, and a layer such as an inorganic multilayer film or a metal conductive layer may be included.
• additives such as a plasticizer, an antioxidant, an ultraviolet absorber, a light stabilizer, an antiblocking agent, a pigment, a dye, and a heat shield material, and a layer such as an inorganic multilayer film or a metal conductive layer may be included.
• ⁇ It may be formed on at least a part of the layer.
• the O layer may be a layer such as an inorganic multilayer film or a metal conductive layer, instead of a layer containing a known resin as a resin component.
• the interlayer film for laminated glass of the present disclosure it is preferable to form a concavo-convex structure on the surface by a conventionally known method such as melt fracture or embossing.
• a conventionally known method such as melt fracture or embossing.
• the shape of the concave-convex structure is not particularly limited, and conventionally known ones can be adopted.
• the total thickness of the interlayer film for laminated glass which comprises eight layers and at least one layer, is preferably at least 0.40101 or more, more preferably at least 0.50101, and preferably twenty five Or less, more preferably 2.0 Below, more preferably 1. It is the following.
• the total thickness is equal to or more than the lower limit, the handling property when producing a laminated glass is excellent, and when the total thickness of the interlayer film is equal to or less than the upper limit, the weight of the entire laminated glass is reduced, and It is preferable because it can reduce the cost of the membrane.
• the total thickness of the interlayer film having such a constitution is preferably ⁇ 08 01 01 or more, more preferably 1.1 01 01 or more, and preferably 4. Or less, more preferably 3. Or less, more preferably 2
• the total thickness is equal to or more than the lower limit, it is possible to obtain a structure having particularly excellent sound insulating properties of the laminated glass, and when the total thickness of the interlayer film is equal to or less than the upper limit, the weight reduction of the entire laminated glass is achieved. This is preferable because it can lead to reduction in the cost of the interlayer film.
• the present disclosure is also directed to a laminated glass in which the interlayer film for laminated glass of the present disclosure is sandwiched between two sheets of glass.
• the laminated glass according to the present disclosure has excellent sound insulation due to the interlayer film for laminated glass according to the present disclosure, and therefore, the windshield for vehicles, the side glass for vehicles, the sunroof for vehicles, the rear glass for vehicles, or the head-up display. It is preferably used as a glass for use.
• the vehicle in the present disclosure means a train, a train, a car, a ship, an aircraft, or the like.
• the cross-sectional shape of the intermediate film is preferably such that the end face side on the side _ is thick and the other end face side is thin.
• the cross-sectional shape may be a wedge-shaped shape such that the thickness gradually decreases from one end face side to the other end face side, or between one end face side and the other end face side.
• the thickness may be the same up to an arbitrary position, and the cross-section may be partially wedge-shaped so that the thickness gradually decreases from the desired position to the other end face, as long as there is no problem in manufacturing. It may have an arbitrary cross-sectional shape regardless of the position.
• the layers whose cross-sectional thickness changes may be all layers or only some layers.
• the laminated glass of the present disclosure usually two pieces of glass are used on the outermost side.
• the glass is not particularly limited, and for example, inorganic glass, organic glass, or a combination thereof can be used.
• inorganic glass are float sheet glass, polished ⁇ 2020/175 178 35 ⁇ (:171? 2020 /005739
• Examples include plate glass, template glass, mesh plate glass and heat ray absorbing plate glass.
• Examples of the material forming the organic glass include acrylic resin (for example, polymethylmethacrylate resin) and polycarbonate resin.
• the glass may be colorless, colored, transparent or non-transparent.
• the thickness of the glass is not particularly limited, but it is preferably 100!
• the interlayer film of the present disclosure has excellent sound insulation properties, even if thinner glass is used, high sound insulation properties are exhibited, so that the weight of the laminated glass can be reduced.
• the thickness is preferably 3.0. Or less, more preferably 2. Or less, more preferably 2.0 or less, particularly preferably 1.8 It is the following.
• the thickness of one glass is 1.8 111 111 or more and the thickness of the other glass is 1.8 111 111 or less, and the difference between the thicknesses of the two glasses is 0.2.
• the difference in thickness between the two glasses described above is preferably ⁇ . Is over 1
• .0 111 It may be more than or equal to, and it may be less than or equal to.
• a laminated glass having a structure in which the thickness of the glass outside the vehicle is the same as that of the glass inside the vehicle is mainly used. Even in such a case, the interlayer film with high sound insulation according to the present disclosure is preferably used. To be done.
• the sound insulation of laminated glass can be evaluated by the loss coefficient obtained by the damping test of laminated glass by the central excitation method described in the examples below, and the maximum loss coefficient at the secondary resonance frequency of laminated glass is The higher the sound quality, the better the sound insulation of the laminated glass.
• the maximum loss coefficient at the secondary resonance frequency of the laminated glass is preferably 0.30 or more, more preferably ⁇ 0.40 or more, and further preferably ⁇ 0.50 or more.
• the laminated glass of the present disclosure can be manufactured by a conventionally known method. Examples of such methods include a method using a vacuum laminator device and a vacuum bag. ⁇ 2020/175 178 36 ⁇ (: 171? 2020 /005739
• a method using a vacuum ring, a method using a vacuum ring, a method using a nip roll, and the like are included. It is also possible to carry out a method of additionally charging into the autoclave after temporary pressure bonding.
• the method using the vacuum laminator device for example, a known device used for manufacturing a solar cell is used, and a reduced pressure of 1 X 10- ⁇ 93 or more and 3 X 10- ⁇ 93 or less is used. Lamination is performed at a temperature of 0° ⁇ or more and 200°° or less (especially 1300°° or more and 170°° or less).
• No. 6 83 for example, about 2 x 1 Lamination is performed under the pressure of 3 above 1300° and above 1450°.
• Examples of the method using the nip roll include a method in which the first temporary pressure bonding is performed at a temperature equal to or lower than the flow starting temperature of the polyvinyl acetal resin, and then the pressure bonding or the temporary pressure bonding is performed under a condition close to the flow starting temperature. Specifically, for example, it is heated to 30° ⁇ or more and 100° o or less with an infrared heater or the like, degassed by the mouth, and then temporarily pressure-bonded, and further 50° ⁇ or more 1
• One method is to heat to 50° or less and then press-bond or temporarily press-bond with the mouth.
• the autoclave process that is additionally performed after the temporary pressure bonding is, for example, 1 IV! 3 or more and 1 5 IV! 3 or less under pressure. ° in ⁇ as 1 6 0 ° ⁇ below a temperature of 0. 5 hours or more 2 hours or less time is performed.
• polyvinyl putilal (hereinafter referred to as "Mimi") resin has the same viscosity average degree of polymerization (") as the target viscosity average degree of polymerization.
• Mimi polyvinyl putilal
• ⁇ Polyvinyl alcohol having a viscosity average degree of polymerization measured based on “Test method for polyvinyl alcohol”) was used, which was acetalized with _butyraldehyde in the presence of a hydrochloric acid catalyst. ⁇ 2020/175 178 37 ⁇ (: 171-1? 2020/005739
• thermoplastic material that constitutes the layer
• thermoplastic resin material that constitutes the eight layers is heated at a temperature of 230° (:,,
• thermoplastic resin material (hydrogenated block copolymer, also referred to as “hydrogenated block copolymer” below) are dissolved in ⁇ ⁇ 3 to be 1 1 ⁇ 1 — 1 ⁇ /
• the hydrogenated block copolymers (thermoplastic resin materials constituting the layers) used in the examples and comparative examples are the glass transition temperature derived from the monomer constituting the polymer block (3), and the polymer And the glass transition temperature derived from the monomer constituting the block (). Therefore, the glass transition temperature of the polymer block (3) and the glass transition temperature of the polymer block (swell) contained in the hydrogenated block copolymer as the glass transition temperature of the hydrogenated block copolymer are Scanning calorimetric measurement Seiko Denshi Kogyo Co., Ltd.). In the measurement, the temperature was increased from 120° ⁇ to 150° ⁇ at a heating rate of 10° ⁇ /min and the temperature at the inflection point of the measurement curve was read.
• Sheet-like polyvinyl acetal tree with a thickness of 500 made in each reference example ⁇ 2020/175 178 38 ⁇ (:171? 2020 /005739
• the fat composition was conditioned for 48 hours under conditions of 20 ° and 20% relative humidity, or 48 hours under conditions of 20 ° and 65% relative humidity.
• the moisture content of the sheet-shaped polyvinyl acetal resin composition whose humidity was adjusted was measured using a force-fitting moisture meter ( ⁇ _200: volumetric moisture meter) manufactured by Mitsubishi Chemical Analytsk Co., Ltd.
• Laminated glass was produced according to the following procedure, and the haze was measured based on "3 ⁇ 71 05.”
• Each of the interlayer films prepared in the examples or comparative examples was cut into a size of 50 ⁇ 40 in width, left standing in an atmosphere of 20 ° ⁇ and 20% relative humidity for 48 hours, and then put on a commercially available flat glass. I put it between two sheets. Using a vacuum laminator device, temporary pressure bonding was performed under the condition of 301 ⁇ 3 under reduced pressure of 100 ° ⁇ for 20 minutes, and then using an autoclave, temperature of 140 ° ⁇ , pressure 1.
• a laminated glass was produced by pressure bonding under the condition of 60 minutes. The haze was measured 1 day and 30 days after the laminated glass was prepared.
• Each of the interlayer films prepared in the examples or comparative examples was cut into a size of 300 in length and 25 in width, and commercially available float glass (length: 300 X thickness
• a damping test of laminated glass was performed by the central excitation method.
• the mechanical impedance at the excitation point is calculated based on the obtained excitation force and the velocity signal obtained by integrating the acceleration signal, and the horizontal axis is the frequency and the vertical axis is the mechanical impedance.
• the loss coefficient (second order) of the laminated glass was calculated from the indicated frequency and the half-width.
• the refractive index of the plasticizer was measured with an Abbe refractometer.
• a resin acetalization degree of 70 mol%, vinyl acetate unit content of 0.9 mol%, viscosity average degree of polymerization of polyvinyl alcohol as a raw material of about 1700
• a composition was used in which 38.8 parts by mass of dipropylene glycol dibenzoate ( ⁇ ) was mixed as a plasticizer.
• This polyvinyl acetal resin composition was extrusion-molded to prepare a sheet having a thickness of 500.
• a sheet was prepared in the same manner as in Example 1 except that the plasticizer shown in Table 1 was used instead of dipropylene glycol dibenzoate, and the moisture content was measured. The results are shown in Table 1.
• 1_205 5 represents polycaprolactone diol “Placcel 2051” manufactured by Daicel Corporation.
• ⁇ !-205 II is a compound that does not have an aromatic ring in the molecular structure and has a hydroxyl group.
• the compositions corresponding to the polyvinyl acetal resin composition in the present disclosure had a low humidity condition of 20 °0, a relative humidity of 20% and a temperature of 20 ° ⁇ . Under all of the high humidity conditions of 65% relative humidity, it had low hygroscopicity equivalent to that of the commonly used 308 (Reference Example 5). On the other hand, the polyvinyl acetal resin composition of Reference Example 6 had higher hygroscopicity under both low and high humidity conditions. From these results, it can be seen that the compositions of Reference Examples 1 to 4 containing the specific plasticizer bring about a resin layer which is hardly affected by moisture. Such a resin layer can have excellent adhesion to glass and adhesion controllability.
• the thermoplastic resin material constituting the layer contains 8% by mass of styrene units and 92% by mass of isoprene units, and has an I an 8 peak temperature of 1 11.8 ° ⁇ and 2
• a polyvinyl acetal resin composition constituting the Mimi layer As a polyvinyl acetal resin composition constituting the Mimi layer, Miki Tsuki (acetalization degree of 70 mol%, vinyl acetate unit content of 0.9 mol%, viscosity average polymerization degree of polyvinyl alcohol of about 1 7) and a plasticizer (dipropylene glycol dibenzoate; 0 Resin composition consisting of ⁇ 2020/175178 41 ⁇ (: 171-1?2020/005739
• the amount of the plasticizer with respect to 100 parts by weight of the resin is 38.8 parts by weight) is used to extrude the thermoplastic resin material forming the 8 layers and the polyvinyl acetal resin composition forming the forming layer, respectively. Molding was performed to produce one layer with a thickness of 250 and two layers with a thickness of 250.
• the eight layers were sandwiched between two Mimi layers and press-molded at 100° to obtain an intermediate film having a three-layer structure of Mimi/eight/Mimi layers.
• Table 2 shows each physical property and each evaluation result of the obtained interlayer film.
• An interlayer film was produced in the same manner as in Example 1 except that the Mitsumi layer having a different plasticizer described in Table 2 was used instead of the Mimi layer in Example 1.
• Table 2 shows each physical property and each evaluation result of the obtained interlayer film.
• the Mitsumi layers/layers having the different thicknesses of the Mitsumi layers (referred to as “ two Mitsumi layers” in the table) shown in Table 2 as the central layer.
• An interlayer film was produced in the same manner as in Example 1 except that a five-layer structure of /Mitsumi 2- layer/Eight-layer/Mimi-layer was adopted. Table 2 shows each physical property and each evaluation result of the obtained interlayer film.
• An interlayer film was produced in the same manner as in Example 1 except that the Mitsumi layer having a different plasticizer described in Table 2 was used instead of the Mimi layer in Example 1.
• Table 2 shows each physical property and each evaluation result of the obtained interlayer film.
• the interlayer films of Examples 1 to 4 were excellent in adhesiveness with glass and could realize controllability of adhesion with glass.
• Comparative Example 4 in the case of using a plasticizer having a hydroxyl group and not having an aromatic ring in the molecular structure although it has three specific values (Comparative Example 4), as described in relation to Table 1, Since the resin composition containing it had higher hygroscopicity, the interlayer film of Comparative Example 4 had poor adhesiveness with glass, and it was difficult to achieve adhesiveness controllability with glass.
• the interlayer film of the present disclosure has sufficiently high transparency and sound insulation, and can realize good adhesion and adhesion controllability between the interlayer film and glass.
• Such an interlayer film of the present disclosure can be suitably used for a vehicle windshield, a vehicle side glass, a vehicle sunroof, a vehicle rear glass or a head-up display glass.

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