JP2011088781A - Interlayer for laminated glass and laminated glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlayer for laminated glass, excellent in damping property at a high temperature and in sound insulating property in a wide temperature range and excellent in heat insulating property. <P>SOLUTION: The interlayer for laminated glass comprises an intermediate layer having a portion (A) made of a resin composition (A) or a resin (A) and a portion (B) made of a resin composition (B) or a resin (B), arranged in a horizontal direction, interposed by two coating layers. The difference between the temperature Ta where the loss tangent of dynamic viscoelasticity of the resin composition (A) or the resin (A) at a frequency of 1 Hz reaches the maximum and the temperature Tb where the loss tangent of dynamic viscoelasticity of the resin composition (B) or the resin (B) at a frequency of 1 Hz reaches the maximum is 10°C or more. The coating layer comprises a resin composition containing a polyvinyl acetal resin. At least one of the portion (A), portion (B) and coating layers contains a heat ray shielding agent. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to an interlayer film for laminated glass having excellent vibration damping properties at high temperatures, sound insulation in a wide temperature range, and excellent heat insulation. Further, the present invention relates to a laminated glass using the interlayer film for laminated glass.

Laminated glass is widely used as a window glass for vehicles such as automobiles, aircrafts, buildings, and the like because it is safe because it does not scatter glass fragments even if it is damaged by an external impact. The laminated glass includes, for example, a laminated glass integrated by interposing an interlayer film for laminated glass made of polyvinyl acetal resin such as polyvinyl butyral resin plasticized with a liquid plasticizer between at least a pair of glasses. .

In recent years, demand for heat shielding in laminated glass has been increasing due to an increase in environmental problems. In general, infrared rays having a wavelength of 780 nm or more among light rays have a small amount of energy of about 10% as compared with ultraviolet rays, but have a large thermal effect, and once absorbed by a substance, they are released as heat and cause a temperature rise. Therefore, it is called hot wire. Therefore, for example, if infrared rays entering from the windshield and side glass of an automobile can be blocked, the heat shielding property can be improved and the temperature rise inside the automobile can be suppressed.
In particular, a region where humans feel a sense of heat due to an increase in skin epidermal temperature (1400 nm to 1600 nm, 1800 nm to 2000 nm), and a region where humans feel a sense of irritation when reaching the nerve endings where they feel the deep feeling of the skin (1200 nm) (1400 nm, 1600 nm to 1800 nm, 2000 nm to 2400 nm) has been devised (Patent Document 1).

On the other hand, in recent years, attempts have been made to make the entire laminated glass thinner due to problems such as weight reduction and cost. However, when the entire laminated glass is thinned, there is a problem that heat insulation and sound insulation are lowered. In particular, when such a laminated glass is used as a windshield of an automobile or the like, the sound insulation of sounds in the range of about 2000 to 5000 Hz, which has not been a problem so far, such as wind noise and driving sound of a wiper becomes a problem. It is coming.

To deal with such a problem, for example, in Patent Document 2, a sound insulation layer containing a large amount of plasticizer as shown in FIG. 8 is sandwiched between coating layers containing a normal amount of plasticizer. An interlayer film for sound insulating laminated glass is disclosed. With such a configuration, the sound insulation layer exhibits high sound insulation performance, and the coating layer protects the large amount of plasticizer in the sound insulation layer from bleeding out, so that sound insulation and prevention of bleeding out are achieved. An intermediate film for sound insulation laminated glass is obtained.

However, the laminated glass using the interlayer film for sound-insulating laminated glass described in Patent Document 2 has excellent sound-insulating performance in the normal temperature range, but cannot sufficiently isolate sound of a specific wavelength in the low-temperature range and the high-temperature range. was there. For example, in the case of an automobile, the operating temperature range is -30 to 70 ° C, which is very wide. There has been a demand for an interlayer film for laminated glass that is excellent in sound insulation and heat insulation even in a wide temperature range.

International Publication No. 03/018502 Pamphlet JP-A-5-310449

An object of this invention is to provide the intermediate film for laminated glasses which is excellent in the sound insulation in a wide temperature range, and is excellent also in heat insulation. Moreover, it aims at providing the laminated glass which uses this intermediate film for laminated glasses.

The present invention is for laminated glass in which an intermediate layer having a portion A made of a resin composition A or a resin A and a portion B made of a resin composition B or a resin B in the horizontal direction is sandwiched between two coating layers. A temperature Ta at which the loss tangent of the dynamic viscoelasticity of the resin composition A or the resin A at a frequency of 1 Hz is maximum, and the dynamic viscoelasticity of the resin composition B or the resin B at a frequency of 1 Hz. The difference between the loss tangent and the temperature Tb at which the loss tangent is maximum is 10 ° C. or more, and the coating layer is made of a resin composition containing a polyvinyl acetal resin, and is at least one of the part A, the part B, or the coating layer. 1 is an interlayer film for laminated glass characterized by containing a heat ray shielding agent.
The present invention is described in detail below.

This inventor produced the laminated glass using the intermediate film for laminated glasses described in patent document 2, and examined in detail the sound insulation performance. That is, as shown in FIG. 8, an interlayer film for laminated glass is prepared by sandwiching a sound insulating layer containing a large amount of a plasticizer with a coating layer containing a normal amount of a plasticizer, and this is prepared with a thickness of 2 mm. A laminated glass was produced by sandwiching the two laminated glass plates, and the sound insulation performance of the obtained laminated glass was examined. Then, it was found that sound having a frequency of about 3150 Hz is easily transmitted at 0 ° C., and sound having a frequency of about 6300 Hz is easily transmitted at 40 ° C. On the other hand, at 23 ° C., transmission of such specific frequency sound was not recognized. This was considered for the following reason.

At 0 ° C., all of the covering layer / sound insulating layer / covering layer constituting the interlayer film for laminated glass is in a glass state. The two glass plates joined by such an interlayer film for laminated glass are integrated and behave as if they are one glass plate having a thickness of 4 mm. Therefore, the sound near the frequency of 3150 Hz is easily transmitted due to the coincidence effect in the glass plate having a thickness of 4 mm.
At 40 ° C., the sound insulation layer constituting the interlayer film for laminated glass is in a rubber state. The two glass plates bonded by such an interlayer film for laminated glass independently behave as two glass plates having a thickness of 2 mm. Therefore, the sound near the frequency of 6300 Hz is easily transmitted due to the coincidence effect in the glass plate having a thickness of 2 mm.
However, at 23 ° C., the sound insulation layer constituting the interlayer film for laminated glass is in an intermediate state between the glass state and the rubber state. The two glass plates joined by such an interlayer film for laminated glass show an intermediate behavior between one 4 mm glass plate and two 2 mm glass plates, and the frequency is around 3150 Hz. And sound with a frequency around 6300 Hz are less likely to be transmitted, and the overall sound insulation performance is demonstrated.
From this result, in order to exhibit high sound insulation performance at a certain temperature, two glass plates are joined by an interlayer film for laminated glass having a resin layer that is in an intermediate state between the glass state and the rubber state at the temperature. It turns out that is important.

Further, in the interlayer film for laminated glass having the configuration of the coating layer / sound insulation layer / coating layer described in Patent Document 2, as the temperature rises, the sound insulation layer first becomes an intermediate state between the glass state and the rubber state, resulting in high sound insulation. Demonstrate sex. At this time, the coating layer remains in a glass state. When the temperature is further increased, the temperature reaches a temperature at which the coating layer is in an intermediate state between the glass state and the rubber state. However, at this temperature, since the sound insulation layer is already in a rubber state, the laminated glass behaves as two glass plates. Even though the covering layer is in a state between the glass state and the rubber state, the behavior of the laminated glass is determined by the sound insulating layer in the rubber state. That is, when a plurality of layers are laminated in the thickness direction, the sound insulation of the laminated glass using the interlayer film for laminated glass is determined by the layer that changes from the glass state to the rubber state at the lowest temperature. Is considered to contribute little to sound insulation.

The present inventor has shown that an interlayer film for laminated glass having a plurality of portions made of resin compositions having different temperatures at which the loss tangent of dynamic viscoelasticity has a maximum value in the horizontal direction exhibits high sound insulation performance in a very wide temperature range. I found out that I can do it. This is considered to be because each part exhibits high sound insulation performance in a temperature range where the state is between the glass state and the rubber state. Each part easily transmits sound of a specific frequency except in a temperature range where the part is in an intermediate state between a glass state and a rubber state. However, since the temperature range in which any part is in an intermediate state between the glass state and the rubber state is wide, the interlayer film for laminated glass as a whole can exhibit high sound insulation performance in a wide temperature range. In particular, by sufficiently increasing the temperature difference at which the loss tangent of the dynamic viscoelasticity between each part shows the maximum value, high sound insulation performance can be exhibited in an extremely wide temperature range.
Furthermore, by arranging a plurality of parts made of resin compositions having different temperatures at which the loss tangent of dynamic viscoelasticity has a maximum value in the horizontal direction, the loss tangent of dynamic viscoelasticity has the maximum value. Since it is distributed also to the part where the temperature shown is high, the damping performance of the layer is sufficiently exhibited. Thereby, the damping performance under high temperature is sufficiently exhibited.

The interlayer film for laminated glass of the present invention has an intermediate layer having a part A made of the resin composition A or the resin A and a part B made of the resin composition B or the resin B in the horizontal direction.
Having the part A and the part B in the horizontal direction means, for example, that the part A and the part B are arranged in the horizontal direction as shown in FIG.

Temperature (hereinafter also referred to as “tan δ peak temperature”) Ta at which the loss tangent of dynamic viscoelasticity (hereinafter also referred to as “tan δ”) of the resin composition A or resin A at a frequency of 1 Hz is the maximum value. The difference from the tan δ peak temperature Tb of the resin composition B or resin B is 10 ° C. or more.
The tan δ can be measured by the following method based on JIS K 7244. A test sheet (diameter 8 mm) was prepared using the resin composition, and the dynamic viscoelasticity of the obtained test sheet was measured by a shearing method under conditions of a strain amount of 1.0% and a frequency of 1 Hz. Tan δ can be measured by measuring the temperature dispersion of dynamic viscoelasticity at 3 ° C./min.
The peak temperature of tan δ means a temperature at which tan δ obtained by the above method has a maximum value. The peak temperature of tan δ can be measured using, for example, a viscoelasticity measuring device (“ARES” manufactured by Rheometrics).

According to the study by the present inventor, the peak temperature of tan δ varies depending on the temperature and frequency, and as the measurement frequency increases, the peak temperature of tan δ shifts to the high temperature side. On the other hand, the coincidence frequency of the glass is about 2000 to 8000 Hz although it depends on the thickness. Since the coincidence frequency of the glass having a thickness of 4 mm is around 3150 Hz, if 18 ° C. is added to the peak temperature of tan δ in the dynamic viscoelasticity measurement at 1 Hz, the peak temperature of tan δ near 3150 Hz is obtained. Therefore, the temperature range in which the resin composition is in an intermediate state between the glass state and the rubber state is a range of about ± 10 ° C. centering on the peak temperature of tan δ plus 18 ° C., and more surely the peak temperature of tan δ. It is a range of ± 10 ° C. centering on plus 18 ° C.

For example, when the peak temperature of tan δ of the resin composition A is 2 ° C., the region A is in an intermediate state between a glass state and a rubber state in a region of about 10 to 30 ° C. centering on 20 ° C., and this temperature region High sound insulation performance can be exhibited.
On the other hand, for example, when the tan δ peak temperature of the resin composition B is 23 ° C., the region A is in an intermediate state between the glass state and the rubber state in a region of about 31 to 51 ° C. centering on 41 ° C., and this temperature High sound insulation performance can be exhibited in the region.
That is, for the laminated glass of the present invention, the portion A made of the resin composition A having a tan δ peak temperature of 2 ° C. and the portion B made of the resin composition B having a tan δ peak temperature of 23 ° C. in the horizontal direction. The interlayer film can exhibit high sound insulation performance in a temperature range of 10 to 51 ° C.

When the difference between the tan δ peak temperature Ta of the resin composition A or the resin A and the tan δ peak temperature Tb of the resin composition B or the resin B is less than 10 ° C., a temperature region that can be covered by two parts is It overlaps greatly and it becomes impossible to exhibit high sound insulation performance in a wide temperature range. The difference between the tan δ peak temperature Ta and the tan δ peak temperature Tb is preferably 15 ° C. or more. A more preferred lower limit of the difference between the tan δ peak temperature Ta and the tan δ peak temperature Tb is 20 ° C., and a more preferred lower limit is 25 ° C. A preferable upper limit of the difference between the tan δ peak temperature Ta and the tan δ peak temperature Tb is 60 ° C., and a more preferable upper limit is 55 ° C.

If the difference between the peak temperature Ta of tan δ and the peak temperature Tb of tan δ exceeds 20 ° C., a temperature region that cannot be covered by two parts is generated, and theoretically, high sound insulation performance cannot be exhibited in this temperature region. it is conceivable that. However, even if the difference between the peak temperature Ta of tan δ and the peak temperature Tb of tan δ is 20 ° C. or more, high sound insulation performance can actually be exhibited even in this temperature range.
That is, when Ta <Tb and the difference between Ta and Tb is 20 ° C. or more, in the temperature range of Ta + 28 ° C. to Tb + 8 ° C., the part A is in a rubber state and the part B is in a glass state. Therefore, for example, in the case of a laminated glass made of 2 mm and 2 mm glass, a sound near 3150 Hz is transmitted through the part B, and a sound near 6300 Hz is transmitted through the part A. However, the part A does not transmit sound near 3150 Hz, and the part B does not transmit sound near 6300 Hz. Therefore, a single layer intermediate film made of resin composition A or resin A, a single layer intermediate film made of resin composition B or resin B, a layer made of resin composition A or resin A, and a resin composition B or resin B When compared with an intermediate film having a structure in which a layer made of the above is laminated, it can be said that the intermediate film for laminated glass of the present invention can exhibit high sound insulation performance even in a temperature range of Ta + 28 ° C. to Tb + 8 ° C.

The peak temperature Ta of tan δ and the peak temperature Tb of tan δ may be selected in accordance with the use and use environment of the obtained laminated glass. For example, when a laminated glass is used for a windshield for an automobile, the operating temperature range is −30 to 70 ° C., and therefore, Ta and Tb are preferably selected from a range of −38 to 42 ° C.
For example, if it is assumed to be used in a cold district, it is conceivable to set Ta to a range of -38 to -8 ° C and Tb to a range of -28 to 2 ° C. By setting the peak temperature Ta of tan δ and the peak temperature Tb of tan δ within this range, high sound insulation performance can be exhibited in a temperature range of −30 to 30 ° C. A preferable range of Ta when used in a cold region is −38 to −18 ° C., and a preferable range of Tb is −28 to −8 ° C.
Assuming use in a warm region, it is conceivable to set Ta to 2 to 32 ° C. and Tb to 12 to 42 ° C. By setting the tan δ peak temperature Ta and the tan δ peak temperature Tb within this range, high sound insulation performance can be exhibited in a temperature range of 10 to 70 ° C. The preferable range of Ta when used in a warm region is 12 to 32 ° C, and the preferable range of Tb is 22 to 42 ° C.

In the case where high sound insulation performance should be exhibited in a wider temperature range, in addition to the portions A and B, the intermediate layer further has a tan δ peak temperature Tc of the tan δ peak temperature Ta and tan δ peak temperature. You may have the site | part C which consists of the resin composition C or resin C between Tb in a horizontal direction. For example, when Ta is set to −28 to 2 ° C., Tc is set to −18 to 12 ° C., and Tb is set to −8 to 22 ° C., high sound insulation performance can be exhibited in a temperature range of −20 to 50 ° C. High sound insulation performance can be exhibited in a wide area from a cold region to a warm region.
When the interlayer film for laminated glass of the present invention should exhibit high sound insulation performance in a wider temperature range, it may have four or more parts made of resin compositions having different tan δ peak temperatures in the horizontal direction. It doesn't matter.

In the intermediate layer, the arrangement of the part A and the part B is not particularly limited. For example, as shown in FIG. 1, the part A and the part B are arranged in half in the horizontal direction, or the part A and the part B as shown in FIGS. The aspect by which multiple are arrange | positioned in the horizontal direction is mentioned. Moreover, as shown in FIGS. 4 and 5, the interface between the part A and the part B may form a slope.
6 and 7 show an example in which the intermediate layer further has a portion C. FIG.

Since the said intermediate | middle layer is easy to manufacture, it is preferable to have the said site | part A and the site | part B (and site | part C) in strip shape. For example, when used for a windshield or the like for an automobile, if the part A is opposed to the passenger seat side and only the part B is opposed to the driver seat side, a sound can be heard from the right ear, A situation may occur in which no sound can be heard from the left ear. Considering the size of the human head (the distance between the left and right ears), the width of each band is preferably 300 mm or less, more preferably 200 mm or less.

The area ratio of the part A and the part B in the intermediate layer is not particularly limited.
The sound that is transmitted when the interlayer film for laminated glass is in a rubber state has a higher frequency than the sound that is transmitted when the interlayer film is in a glass state. For example, a sound near 3150 Hz is transmitted through a portion in a glass state, and a sound near 6300 Hz is transmitted through a portion in a rubber state. In general, the sound insulation performance has the property that the higher the frequency, the higher the performance. Therefore, higher sound insulation performance is realized in a wide temperature range by balancing the area ratio of the part A and the part B so that the transmission of sound near 6300 Hz is large and the transmission of sound near 3150 Hz is reduced. be able to. For example, when Ta <Tb, the area ratio between the part A and the part B is preferably 9: 1 to 4: 6. Beyond the preferred range, high sound insulation performance may not be achieved over a wide temperature range. Moreover, when the ratio of the site | part B will be less than 10%, the vibration damping property under high temperature may not be acquired. The area ratio of the part A and the part B is more preferably 8: 2 to 6: 4.
When the part A and the part B overlap in the thickness direction, the overlapping part is regarded as a part made of a resin composition having a low tan δ peak temperature.

The resin, resin A, and resin B contained in the resin composition A and the resin composition B are not particularly limited, but are preferably thermoplastic resins.
Although the said thermoplastic resin is not specifically limited, Polyvinyl acetal resin, a styrene-vinyl isoprene-styrene triblock copolymer, an ethylene-vinyl acetate copolymer etc. are mentioned. Especially, it is preferable that the said thermoplastic resin is a styrene-vinyl isoprene-styrene triblock copolymer and a polyvinyl acetal resin, and it is more preferable that it is a polyvinyl acetal resin. The said resin may be used independently and may use 2 or more types together.

The polyvinyl acetal resin can be produced by reacting polyvinyl alcohol with an aldehyde.
The polyvinyl alcohol can be produced by saponifying polyvinyl acetate.
The saponification degree of the polyvinyl alcohol is preferably 80 to 99.8 mol%.
The preferable lower limit of the polymerization degree of the polyvinyl alcohol is 200, and the preferable upper limit is 3000. When the polymerization degree is less than 200, the penetration resistance of the laminated glass may be lowered. When the said polymerization degree exceeds 3000, shaping | molding of the intermediate film for laminated glasses may become difficult. The more preferable lower limit of the degree of polymerization is 500, and the more preferable upper limit is 2000.

The resin composition A and the resin composition B preferably contain a plasticizer.
The plasticizer is not particularly limited, and examples thereof include organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, phosphoric acid plasticizers such as organic phosphoric acid plasticizers and organic phosphorous acid plasticizers, and the like. Is mentioned.

The monobasic organic acid ester is not particularly limited, and examples thereof include glycols such as triethylene glycol, tetraethylene glycol, and tripropylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptylic acid, and n-octyl. Examples thereof include glycol esters obtained by reaction with monobasic organic acids such as acid, 2-ethylhexyl acid, pelargonic acid (n-nonyl acid), and decyl acid.

The polybasic organic acid ester is not particularly limited. For example, an ester compound of a polybasic organic acid such as adipic acid, sebacic acid, or azelaic acid and an alcohol having a linear or branched structure having 4 to 8 carbon atoms. Is mentioned.

The organic ester plasticizer is not particularly limited. For example, triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n- Octanoate, triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate, ethylene glycol di-2-ethyl butyrate, 1,3-propylene glycol di 2-ethyl butyrate, 1,4-butylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethyl butyrate, diethylene glycol di-2-ethyl hexanoate, dipropylene glycol Di-2-ethylbutyrate, triethylene glycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicapryate, triethylene glycol di-n-heptanoate, tetraethylene glycol di- n-heptanoate, triethylene glycol di-2-ethylbutyrate, triethylene glycol bis (2-ethylbutyrate), triethylene glycol di (2-ethylhexanoate), triethylene glycol diheptanoate, tetraethylene Examples include glycol diheptanoate, dihexyl adipate, dioctyl adipate, hexyl cyclohexyl adipate, diisononyl adipate, heptylnonyl adipate, dibutyl sebacate and the like.

The organophosphate plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate, and the like.

Among the above plasticizers, dihexyl adipate (DHA), triethylene glycol di-2-ethylhexanoate (3GO), tetraethylene glycol di-2-ethylhexanoate (4GO), triethylene glycol di-2 -Selected from the group consisting of ethyl butyrate (3GH), tetraethylene glycol di-2-ethylbutyrate (4GH), tetraethylene glycol diheptanoate (4G7) and triethylene glycol diheptanoate (3G7) It is preferable that there is at least one.
Furthermore, since the plasticizer is difficult to hydrolyze, triethylene glycol di-2-ethylhexanoate (3GO), triethylene glycol di-2-ethylbutyrate (3GH), tetraethylene glycol di-2-ethylhexa Noate (4GO) and dihexyl adipate (DHA) are preferred, and triethylene glycol di-2-ethylhexanoate (3GO) is more preferred.

The resin composition A and the resin composition B are a dispersion auxiliary agent, an antioxidant, a light stabilizer, a flame retardant, an antistatic agent, an adhesive force adjusting agent, a moisture resistance agent, a heat ray reflective agent, a heat ray absorber, and a fluorescence enhancement agent. You may contain additives, such as a whitening agent and a blue pigment.

The method of setting the difference between the tan δ peak temperature Ta and the tan δ peak temperature Tb to 10 ° C. or higher is not particularly limited, but (1) the main resin contained in the resin composition A and the resin composition B, the resin A , A method of selecting different resins having a tan δ peak temperature of 10 ° C. or more as the resin B, (2) a method of adjusting the content of the plasticizer contained in the resin composition A and the resin composition B, and the like. It is done.

(1) A method for selecting different resins having a tan δ peak temperature of 10 ° C. or higher as the resin, resin A, and resin B contained in the resin composition A and the resin composition B will be described in detail.
When the peak temperature of tan δ is adjusted by the above method (1), it is preferable to use a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer, a styrene-vinyl isoprene-styrene triblock copolymer, or the like as the resin. In particular, the styrene-vinylisoprene-styrene triblock copolymer can easily adjust the peak temperature of tan δ by selecting a monomer component, designing a copolymerization ratio of each monomer component, and the like. If a mixed resin of two or more styrene-vinylisoprene-styrene triblock copolymers having different tan δ peak temperatures is used, the tan δ peak temperature can be easily adjusted by changing the blending ratio. In addition, the peak temperature of tan δ can be adjusted by controlling the amount of acetyl groups and the degree of acetalization of the polyvinyl acetal resin.

(2) A method for adjusting the content of the plasticizer contained in the resin composition A and the resin composition B will be described in detail.
In general, the greater the amount of plasticizer contained in the resin composition, the lower the peak temperature of tan δ, and the lower the amount of plasticizer, the higher the peak temperature of tan δ. Therefore, for example, when the peak temperature Ta of tan δ is smaller than the peak temperature Tb of tan δ, there is a method in which the plasticizer compounding amount of the resin composition A is increased and the plasticizer compounding amount of the resin composition B is decreased.

When adjusting the peak temperature of tan δ by the method (2), examples of the resin include polyvinyl acetal resins and vinyl chloride resins. Of these, polyvinyl acetal resin is preferable. The polyvinyl acetal resin can easily adjust the peak temperature of tan δ depending on the amount of plasticizer to be added.

When the tan δ peak temperature Ta <tan δ peak temperature Tb, the polyvinyl acetal resin contained in the resin composition A is not particularly limited, and is obtained by acetalizing polyvinyl alcohol with an aldehyde having 3 to 4 carbon atoms, and Polyvinyl acetal resin having an acetylation degree of 4 mol% or less is preferred. The polyvinyl acetal resin constituting the resin composition B is not particularly limited. A polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol with an aldehyde having 3 to 6 carbon atoms and having a degree of acetylation of 30 mol% or less is provided. Is preferred.

The interlayer film for laminated glass of the present invention further has two coating layers that sandwich the interlayer.
By being sandwiched between the covering layers, the adhesion to the glass plate can be further improved, and the penetration resistance can be further improved. In particular, by sandwiching a portion containing a large amount of the plasticizer between the coating layers, bleeding out of the plasticizer from the portion can be prevented.

The resin composition D or resin D constituting the coating layer preferably has a tan δ peak temperature that is equal to or higher than the highest tan δ peak temperature among the resin composition A, the resin composition B, and the resin composition C. The resin composition D or resin D constituting the coating layer has the highest tan δ peak temperature among the resin composition A or resin A, the resin composition B or resin B, the resin composition C or resin C. It may be the same as the resin composition or resin it has.
The resin composition D or resin D constituting the coating layer is, for example, 100 parts by weight of a polyvinyl acetal resin having 3 or 4 carbon atoms in the acetal group, a degree of acetalization of 60 to 75 mol%, and an acetyl group amount of 10 mol% or less. On the other hand, a resin composition containing 20 to 50 parts by weight of a plasticizer is preferable. The minimum with more preferable content of the plasticizer of the said resin composition D is 25 weight part, and a more preferable upper limit is 45 weight part.

The interlayer film for laminated glass of the present invention contains a heat ray shielding agent in at least one of the part A, the part B, and the coating layer. By containing the said heat ray shielding agent, the intermediate film for laminated glasses of this invention can exhibit high heat-shielding property.

Examples of the heat ray shielding agent include tin-doped indium oxide fine particles, aluminum-doped zinc oxide fine particles, indium-doped zinc oxide fine particles, tin-doped zinc oxide fine particles, silicon-doped zinc oxide fine particles, lanthanum hexaboride fine particles, and cerium hexaboride fine particles. At least one kind of heat shielding fine particles selected from the group is preferred. These heat shielding fine particles have an excellent infrared (heat ray) shielding function.

The heat shielding fine particles preferably have an average particle size of 80 nm or less. When the average particle diameter of the heat shielding fine particles exceeds 80 nm, visible light scattering by the heat shielding fine particles becomes remarkable, and the transparency of the resulting interlayer film for laminated glass may be impaired. As a result, for example, it may not be possible to satisfy a high degree of transparency as required for an automobile windshield. Although the minimum of the average particle diameter of the said heat shielding fine particle is not specifically limited, A preferable minimum is 10 nm. When the average particle diameter of the heat shielding fine particles is less than that, the particles tend to coalesce with each other, and it may be difficult to finely disperse them in the interlayer film for laminated glass.
The average particle diameter of the heat shielding fine particles can be measured by a dynamic light scattering method using an Ar laser as a light source, using a light scattering measuring device (for example, “DLS-6000AL” manufactured by Otsuka Electronics Co., Ltd.). .

In the interlayer film for laminated glass of the present invention, the heat shielding fine particles are preferably finely dispersed uniformly so as to be 1 particle / μm ² or less. That is, when the intermediate film of the present invention is photographed and observed with a transmission electron microscope, the above fine particles having a particle diameter of 100 μm or more are not observed, or if observed, the particle diameter is 100 μm at the center of a 1 μm ² frame. When the above fine particles are placed, the fine particles having a particle diameter of 100 μm or more are preferably dispersed in such a 1 μm ² frame so as not to be observed. Thereby, when it makes a laminated glass, while being excellent in transparency, heat insulation property becomes high over the whole intermediate film. Moreover, the laminated glass excellent in penetration resistance can be obtained because the adhesive force of glass and the intermediate film for laminated glasses can be adjusted.
The dispersion state of the heat shielding fine particles in the interlayer film for laminated glass is observed by photographing at an acceleration voltage of 100 kV using a transmission electron microscope (for example, “H-7100FA type” manufactured by Hitachi, Ltd.). be able to.

The blending amount of the heat shielding fine particles is not particularly limited, but in the resin composition constituting the part A, the part B or the coating layer, the preferred lower limit with respect to 100 parts by weight of the resin is 0.1 parts by weight, and the preferred upper limit is 3 parts by weight. It is. When the blending amount of the heat shielding fine particles is less than 0.1 parts by weight, the infrared shielding effect is not sufficiently exhibited, and the heat shielding properties of the obtained interlayer film for laminated glass and laminated glass may not be sufficiently improved, When it exceeds 3 parts by weight, the visible light transmittance and transparency of the laminated glass obtained may be lowered.

The heat ray shielding agent is, for example, at least one heat shielding compound selected from the group consisting of diimonium dyes, aminium dyes, phthalocyanine dyes, anthraquinone dyes, polymethine dyes, benzenethiol ammonium compounds, thiourea derivatives, and thiol metal complexes. Is preferred. These heat shielding compounds have an excellent infrared (heat ray) shielding function.

The thermal barrier compound is preferably finely dispersed uniformly in the interlayer film for laminated glass. By uniformly finely dispersing, when it is made into a laminated glass, it is excellent in transparency and has a high heat shielding property over the entire interlayer film. Moreover, the laminated glass excellent in penetration resistance can be obtained because the adhesive force of glass and the intermediate film for laminated glasses is adjustable.

The blending amount of the heat-shielding compound is not particularly limited, but in the resin composition constituting the part A, part B or the coating layer, the preferred lower limit with respect to 100 parts by weight of the resin is 0.00001 parts by weight, and the preferred upper limit is 3 parts by weight. It is. When the amount of the heat shielding fine particles is less than 0.00001 parts by weight, the infrared shielding effect is not sufficiently exhibited, and the heat shielding properties of the obtained laminated glass interlayer film and laminated glass may not be sufficiently improved. When it exceeds 3 parts by weight, the visible light transmittance and transparency of the laminated glass obtained may be lowered.

The thickness of the interlayer film for laminated glass of the present invention is not particularly limited, but a preferable lower limit is 300 μm and a preferable upper limit is 2000 μm. If the thickness of the interlayer film for laminated glass of the present invention is less than 300 μm, sufficient penetration resistance may not be obtained. When the thickness of the interlayer film for laminated glass of the present invention exceeds 2000 μm, the thickness used as the interlayer film for laminated glass may be exceeded. The minimum with more preferable thickness of the intermediate film for laminated glasses of this invention is 400 micrometers, and a more preferable upper limit is 1000 micrometers.

The method for producing the interlayer film for laminated glass of the present invention is not particularly limited. For example, the resin composition A or resin A and the resin composition B or resin B are produced by a coextrusion method using an extruder. Alternatively, a method of preparing a sheet made of the resin composition A or the resin A and a sheet made of the resin composition B or the resin B, respectively, and arranging the sheet in the horizontal direction can be used.

A laminated glass in which the interlayer film for laminated glass of the present invention is sandwiched between two transparent plates is also one aspect of the present invention.
The transparent plate used for the laminated glass of the present invention is not particularly limited, and a commonly used transparent plate glass can be used. For example, float plate glass, polished plate glass, template plate glass, mesh plate glass, lined plate glass, coloring Examples thereof include inorganic glass such as prepared glass, heat-absorbing glass, heat-reflecting glass, and green glass. Moreover, organic plastics boards, such as a polycarbonate and a polyacrylate, can also be used.

Two or more types of plate glasses may be used as the plate glass. For example, the laminated glass obtained by inserting the intermediate film for laminated glasses of this invention between transparent float plate glass and colored plate glass like green glass is mentioned. Moreover, the laminated glass obtained by inserting | pinching the intermediate film for laminated glasses of this invention between the said inorganic glass and the said organic plastics board is mentioned.

The laminated glass of the present invention preferably has a visible light transmittance of 70% or more. If the visible light transmittance of the laminated glass is less than 70%, the transparency becomes insufficient in practical use, and it cannot pass the laws and regulations of the vehicle windshield, thereby hindering good visibility.
In addition, the said visible light transmittance | permeability uses the direct-write spectrophotometer (the Shimadzu Corp. make, U-4000), JISR3106 "The test method of the transmittance | permeability, reflectance, emissivity, and solar heat acquisition rate of plate glass" According to the above, it can be obtained by measuring the visible light transmittance of the laminated glass with respect to light having a wavelength of 380 to 780 nm.

As for the laminated glass of this invention, it is preferable that the solar radiation transmittance in wavelength range 300-2100nm is 85% or less of visible light transmittance | permeability. If the solar radiation transmittance exceeds 85%, the heat shielding property is insufficient in practice.
In addition, the said solar radiation transmittance uses a direct writing spectrophotometer (the Shimadzu Corporation make, U-4000), JISR3106 "Test method of the transmittance | permeability, reflectance, emissivity, and solar heat acquisition rate of sheet glass" In accordance with the above, it can be obtained by measuring the transmittance of the laminated glass with respect to light rays in the wavelength region of 300-2100 nm.

The laminated glass of the present invention can be used as a windshield, a side glass, a rear glass, a roof glass, or a panoramic glass when used as an automotive glass.
Moreover, the manufacturing method of the laminated glass of this invention is not specifically limited, A conventionally well-known manufacturing method can be used.

ADVANTAGE OF THE INVENTION According to this invention, the intermediate film for laminated glasses which is excellent in the damping property in high temperature, the sound-insulating property in a wide temperature range, and excellent in heat-insulating property can be provided. Moreover, the laminated glass which uses this intermediate film for laminated glasses can be provided.

It is (a) sectional drawing (b) front view which represented typically the one aspect | mode of the intermediate | middle layer. It is (a) sectional drawing (b) front view which represented typically the one aspect | mode of the intermediate | middle layer. It is (a) sectional drawing (b) front view which represented typically the one aspect | mode of the intermediate | middle layer. It is sectional drawing which represented one aspect | mode of the intermediate | middle layer typically. It is sectional drawing which represented one aspect | mode of the intermediate | middle layer typically. It is (a) sectional drawing (b) front view which represented typically the one aspect | mode of the intermediate | middle layer. It is (a) sectional drawing (b) front view which represented typically the one aspect | mode of the intermediate | middle layer. It is sectional drawing which represented the intermediate film for conventional sound insulation laminated glass typically.

Hereinafter, embodiments of the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

Example 1
(1) Preparation of Resin Composition A Constructing Site A Based on 100 parts by weight of polyvinyl butyral resin (PVB1) having an acetylation degree of 13 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 65 mol% Then, 60 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO) was added as a plasticizer, and the mixture was sufficiently kneaded with a mixing roll to prepare a resin composition A.

(2) Preparation of Resin Composition B Constructing Site B For 100 parts by weight of polyvinyl butyral resin (PVB2) having a acetylation degree of 1 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 68 mol% A resin composition B was prepared by adding 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO) as a plasticizer and kneading sufficiently with a mixing roll.

(3) Preparation of resin composition D constituting coating layer (3-1) Preparation of heat ray absorbent-dispersed plasticizer ITO fine particles were added to 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO). 1 part by weight was charged, polyphosphate ester salt was used as a dispersant, and ITO fine particles were dispersed in the plasticizer with horizontal microbeads. Thereafter, 0.1 part by weight of acetylacetone was added to the dispersion with stirring to prepare a heat ray absorbent-dispersed plasticizer. The average particle diameter of the ITO fine particles in the dispersion was 35 nm.

(3-2) Adjustment of resin composition D constituting the coating layer is 100 parts by weight of polyvinyl butyral resin (PVB2) having a degree of acetylation of 1 mol%, an acetal group having 3 carbon atoms, and a degree of butyralization of 68 mol%. On the other hand, the resin composition D was prepared by adding 40 weight part of said heat ray absorbent dispersion plasticizers, and fully kneading with a mixing roll.

(4) Production of interlayer film for laminated glass (for sound insulation measurement)
The resin composition A is disposed between two release sheets on which 0.1 mm clearance plates are disposed, and the resin composition A is press-molded at 150 ° C., and has a length of 500 mm, a width of 250 mm, and a thickness of 0. A 1 mm sheet A was obtained.
The resin composition B is disposed between two release sheets on which a 0.1 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C. to obtain a length of 500 mm, a width of 125 mm, and a thickness of 0.1 mm. A sheet B of 1 mm was obtained.
The resin composition D is disposed between two release sheets on which a 0.38 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., 500 mm in length, 500 mm in width, 0. A 38 mm sheet D was obtained.
The obtained sheet A and sheet B are horizontally arranged so as to be B / A / B (area ratio 1: 2: 1), and further, the sheet D is laminated on both surfaces thereof, so that an interlayer film for laminated glass ( 500 mm long × 500 mm wide and 0.86 mm thick).

(5) Production of interlayer film for laminated glass (for loss factor measurement)
The resin composition A is placed between two release sheets on which a 0.1 mm clearance plate is placed, and the resin composition A is press-molded at 150 ° C. to obtain a length of 305 mm, a width of 15 mm, and a thickness of 0.1 mm. A 1 mm sheet A was obtained.
The resin composition B is disposed between two release sheets on which a 0.8 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., and has a length of 305 mm, a width of 7.5 mm, and a thickness. A sheet B of 0.1 mm was obtained.
The resin composition D is disposed between two release sheets on which a 0.38 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., and the length is 305 mm, the width is 30 mm, and the thickness is 0. A 38 mm sheet D was obtained.
The obtained sheet A and sheet B are horizontally arranged so as to be B / A / B (area ratio 1: 2: 1), and further, a sheet D is laminated on both surfaces thereof, whereby an interlayer film for laminated glass (vertical 305 mm × width 30 mm, thickness 0.86 mm).

(Example 2)
An interlayer film for laminated glass was produced in the same manner as in Example 1 except that the amount of the plasticizer in the resin composition A was 30 parts by weight and that the ITO of the heat ray absorbent-dispersed plasticizer was 1.6 parts by weight. did.

(Example 3)
Instead of the resin composition A, a styrene-vinylisoprene-styrene triblock copolymer (manufactured by Kuraray Co., Ltd., Hibler # 7311) was used as the resin A, and 2.8 parts by weight of ITO as a heat ray absorbent-dispersed plasticizer was used. An interlayer film for laminated glass was produced in the same manner as in Example 1 except that.

Example 4
An interlayer film for laminated glass was produced in the same manner as in Example 1 except that an acrylic resin (Nipol AR31 manufactured by Nippon Zeon Co., Ltd.) was used as the resin A instead of the resin composition A.

(Example 5)
An interlayer film for laminated glass was produced in the same manner as in Example 1 except that a urethane resin (manufactured by BASF, Elastollan C60D) was used as the resin A instead of the resin composition A.

(Example 6)
An interlayer film for laminated glass was produced in the same manner as in Example 1 except that ethylene-vinyl acetate copolymer (Mitsui / DuPont Polychemical Co., Ltd., EV170) was used as the resin A instead of the resin composition A.

(Example 7)
Resin composition A is a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hybler # 5125) and styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127). An interlayer film for laminated glass was produced in the same manner as in Example 1 except that 1 mixture (weight ratio) was used.

(Example 8)
Resin composition A is composed of a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hybler # 5125) and a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127): An interlayer film for laminated glass was produced in the same manner as in Example 1 except that 1 mixture (weight ratio) was used.

Example 9
(1) Preparation of Resin Composition A Constructing Site A As resin A, a styrene-vinylisoprene-styrene triblock copolymer (manufactured by Kuraray Co., Ltd., Hibler # 7311) was used.

(2) Preparation of Resin Composition B Constructing Site B For 100 parts by weight of polyvinyl butyral resin (PVB2) having a acetylation degree of 1 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 68 mol% A resin composition B was prepared by adding 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO) as a plasticizer and kneading sufficiently with a mixing roll.

(3) Preparation of Resin Composition C Constructing Site C For 100 parts by weight of polyvinyl butyral resin (PVB1) having an acetylation degree of 13 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 65 mol% Then, 60 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO) was added as a plasticizer, and the mixture was sufficiently kneaded with a mixing roll to prepare a resin composition C.

(4) Preparation of resin composition D constituting coating layer (4-1) Production of heat ray absorbent-dispersed plasticizer ITO fine particles were added to 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO). 1 part by weight was charged, polyphosphate ester salt was used as a dispersant, and ITO fine particles were dispersed in the plasticizer with horizontal microbeads. Thereafter, 0.1 part by weight of acetylacetone was added to the dispersion with stirring to prepare a heat ray absorbent-dispersed plasticizer. The average particle diameter of the ITO fine particles in the dispersion was 35 nm.

(4-2) Adjustment of the resin composition D constituting the coating layer is 100 parts by weight of polyvinyl butyral resin (PVB2) having a degree of acetylation of 1 mol%, a carbon number of the acetal group of 3, and a degree of butyralization of 68 mol%. On the other hand, the resin composition D was prepared by adding 40 weight part of said heat ray absorbent dispersion plasticizers, and fully kneading with a mixing roll.

(5) Preparation of interlayer film for laminated glass (for sound insulation measurement)
Resin A is placed between two release sheets on which a 0.1 mm clearance plate is placed, and the resin composition A is press-molded at 150 ° C., having a length of 500 mm, a width of 250 mm, and a thickness of 0.1 mm. Sheet A was obtained.
The resin composition B is placed between two release sheets on which a 0.8 mm clearance plate is placed, and the resin composition B is press-molded at 150 ° C. to obtain a length of 500 mm, a width of 125 mm, and a thickness of 0.1 mm. A sheet B of 1 mm was obtained.
The resin composition C is placed between two release sheets on which a 0.1 mm clearance plate is placed, and the resin composition C is press-molded at 150 ° C. to obtain a length of 500 mm, a width of 125 mm, and a thickness of 0.1 mm. A sheet C of 1 mm was obtained.
The resin composition D is disposed between two release sheets on which a 0.38 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., 500 mm in length, 500 mm in width, 0. A 38 mm sheet D was obtained.
The obtained sheet A, sheet B, and sheet C are arranged so as to be B / A / C (area ratio 1: 2: 1), and the sheet D is laminated on both surfaces thereof, whereby an interlayer film for laminated glass ( 500 mm long × 500 mm wide and 0.86 mm thick).

(6) Preparation of interlayer film for laminated glass (for loss factor measurement)
Resin A is disposed between two release sheets on which a 0.1 mm clearance plate is disposed, and resin composition A is press-molded at 150 ° C., having a length of 305 mm, a width of 15 mm, and a thickness of 0.1 mm. Sheet A was obtained.
The resin composition B is disposed between two release sheets on which a 0.1 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., 305 mm in length, 7.5 mm in width, thickness A sheet B of 0.1 mm was obtained.
The resin composition C is disposed between two release sheets on which a 0.8 mm clearance plate is disposed, and the resin composition C is press-molded at 150 ° C., and has a length of 305 mm, a width of 7.5 mm, and a thickness. A sheet C of 0.1 mm was obtained.
The resin composition D is disposed between two release sheets on which a 0.38 mm clearance plate is disposed, and the resin composition B is press-molded at 150 ° C., and the length is 305 mm, the width is 30 mm, and the thickness is 0. A 38 mm sheet D was obtained.
The obtained sheet A, sheet B, and sheet C are arranged so as to be B / A / C (area ratio 1: 2: 1), and the sheet D is laminated on both surfaces thereof, whereby an interlayer film for laminated glass ( (Length 305 mm × width 30 mm, thickness 0.86 mm).

(Example 10)
An interlayer film for laminated glass was produced in the same manner as in Example 1 except that the sheet A and the sheet B were horizontally arranged so as to be B / A / B (area ratio 1: 6: 1).

(Example 11)
The total area of the sheet A and the total area of the sheet B is set to 1: 1, but the width of each sheet is set to 50 mm, and the sheet A is alternately arranged in the horizontal direction, and B / A / B / A. An interlayer film for laminated glass was produced in the same manner as in Example 1 except that A was disposed.

(Example 12)
An interlayer film for laminated glass was produced in the same manner as in Example 2 except that the amount of plasticizer in resin composition A was 70 parts and the amount of plasticizer in resin composition B was 20 parts.

(Example 13)
Sheet A is a 3: 7 mixture of a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hybler # 5125) and a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127). An interlayer film for laminated glass was produced in the same manner as in Example 3 except that the weight ratio was changed.

(Example 14)
Sheet A and sheet B were horizontally arranged so as to be B / A / B (area ratio 1: 18: 1), and the heat ray absorbent dispersing plasticizer was triethylene glycol-di-2-ethylhexano Ate (3GO) 40 parts by weight of ITO fine particles 0.3 parts by weight, diimmonium dye 0.015 charged, polyphosphoric acid ester salt 0.1 parts by weight as a dispersant, in the plasticizer with horizontal microbeads In the same manner as in Example 1 except that 0.1 part by weight of acetylacetone was added to the dispersion under stirring to produce a heat-absorbing agent-dispersed plasticizer. Produced.

(Example 15)
Sheet A and sheet B were horizontally arranged so as to be B / A / B (area ratio 3: 4: 3), and the heat ray absorbent dispersed plasticizer was triethylene glycol-di-2-ethylhexano 1 part by weight of ITO fine particles, 0.015 part of diimmonium dye and 0.1 part by weight of polyphosphate ester salt as a dispersant are added to 40 parts by weight of ate (3GO), and ITO is placed in the plasticizer using horizontal microbeads. An interlayer film for laminated glass was produced in the same manner as in Example 1 except that fine particles were dispersed and 0.1 part by weight of acetylacetone was added to the dispersion with stirring to produce a heat ray absorbent-dispersed plasticizer. .

(Comparative Example 1)
(1) Preparation of Resin Composition A Constructing Layer A With respect to 100 parts by weight of polyvinyl butyral resin (PVB1) having an acetylation degree of 13 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 65 mol% Then, 60 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO) was added as a plasticizer, and the mixture was sufficiently kneaded with a mixing roll to prepare a resin composition A.

(2) Preparation of resin composition B constituting layer B (2-1) Preparation of heat ray absorbent-dispersed plasticizer ITO fine particles were added to 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO). 1 part by weight was charged, polyphosphate ester salt was used as a dispersing agent, and ITO fine particles were dispersed in the plasticizer with horizontal micro beads. Thereafter, 0.1 part by weight of acetylacetone was added to the dispersion under stirring to prepare a heat ray absorbent-dispersed plasticizer. The average particle size of the ITO fine particles in the dispersion was 35 nm.

(2-2) Production of Resin Composition B With respect to 100 parts by weight of polyvinyl butyral resin (PVB2) having an acetylation degree of 1 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 68 mol%, the heat ray Resin composition B was prepared by adding 40 parts by weight of an absorbent-dispersed plasticizer and kneading sufficiently with a mixing roll.

(3) Preparation of interlayer film for laminated glass Resin composition A was placed between two release sheets on which 0.1 mm clearance plates were placed, and resin composition A was press-molded at 150 ° C. A sheet A having a thickness of 0.1 mm was obtained. Moreover, the resin composition B obtained the sheet | seat B with a thickness of 0.38 mm using the 0.38 mm clearance board on the same conditions.
The obtained sheets A and B were laminated in the order of B / A / B to obtain a laminate. The obtained laminate is placed between two release sheets on which a 0.8 mm clearance plate is placed, and press-molded at 150 ° C. to produce an interlayer film for laminated glass (thickness 0.86 mm). did.
The obtained interlayer film for laminated glass was cut into a predetermined size to produce samples for measuring sound insulation and measuring loss factor.

(Comparative Example 2)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that the amount of the plasticizer in the resin composition A was 30 parts by weight.

(Comparative Example 3)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that a styrene-vinylisoprene-styrene triblock copolymer (manufactured by Kuraray Co., Ltd., Hibler # 7311) was used as the resin A instead of the resin composition A. did.

(Comparative Example 4)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that an acrylic resin (Nipol AR31, manufactured by Zeon Corporation) was used as the resin A instead of the resin composition A.

(Comparative Example 5)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that a urethane resin (manufactured by BASF, Elastollan C60D) was used as the resin A instead of the resin composition A.

(Comparative Example 6)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that an ethylene-vinyl acetate copolymer (Mitsui / DuPont Polychemical Co., Ltd., EV170) was used as the resin A instead of the resin composition A.

(Comparative Example 7)
Resin composition A is a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hybler # 5125) and styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127). An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that the mixture was 1 mixture (weight ratio).

(Comparative Example 8)
Resin composition A is composed of a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hybler # 5125) and a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127): An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that the mixture was 1 mixture (weight ratio).

(Comparative Example 9)
(1) Preparation of resin A constituting layer A As resin A, a styrene-vinylisoprene-styrene triblock copolymer (manufactured by Kuraray Co., Ltd., Hibler # 7311) was used.

(2) Preparation of resin composition B constituting layer B (2-1) Preparation of heat ray absorbent-dispersed plasticizer ITO fine particles were added to 40 parts by weight of triethylene glycol-di-2-ethylhexanoate (3GO). 1 part by weight was charged, polyphosphate ester salt was used as a dispersant, and ITO fine particles were dispersed in the plasticizer with horizontal microbeads. Thereafter, 0.1 part by weight of acetylacetone was added to the dispersion with stirring to prepare a heat ray absorbent-dispersed plasticizer. The average particle diameter of the ITO fine particles in the dispersion was 35 nm.

(2-2) Production of Resin Composition B With respect to 100 parts by weight of polyvinyl butyral resin (PVB2) having an acetylation degree of 1 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 68 mol%, the heat ray Resin composition B was prepared by adding 40 parts by weight of an absorbent-dispersed plasticizer and kneading sufficiently with a mixing roll.

(3) Preparation of Resin Composition C Constructing C Layer With respect to 100 parts by weight of polyvinyl butyral resin (PVB1) having an acetylation degree of 13 mol%, an acetal group having 3 carbon atoms, and a butyralization degree of 65 mol% The resin composition C was prepared by adding 60 parts by weight of the heat ray absorbent-dispersed plasticizer and kneading the mixture sufficiently with a mixing roll.

(4) Preparation of interlayer film for laminated glass Resin A is placed between two release sheets on which a 0.1 mm clearance plate is placed, and resin A is press-molded at 150 ° C. to obtain a thickness of 0. A 1 mm sheet A was obtained. Moreover, the resin composition B obtained the sheet | seat B with a thickness of 0.38 mm using the 0.38 mm clearance board on the same conditions. Furthermore, the resin composition C obtained a sheet C having a thickness of 0.38 mm using a 0.38 mm clearance plate under the same conditions.
The obtained sheet A, sheet B, and sheet C were laminated in the order of B / A / C to obtain a laminate. The obtained laminate is placed between two release sheets on which a 0.86 mm clearance plate is placed and press-molded at 150 ° C. to produce an interlayer film for laminated glass (thickness 0.86 mm). did.

(Comparative Example 10)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 1 except that the thickness of the sheet A was 50 μm and the thickness of the sheet B was 375 μm.

(Comparative Example 11)
An interlayer film for laminated glass was produced in the same manner as in Comparative Example 3 except that the thickness of the sheet A was 50 μm and the thickness of the sheet B was 375 μm.

(Comparative Example 12)
Resin composition B is composed of a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5125) and a styrene-vinylisoprene-styrene triblock copolymer (Kuraray, Hibler # 5127): An interlayer film for laminated glass was produced in the same manner as in Example 1 except that the mixture was 1 mixture (weight ratio).

(Evaluation)
The following evaluation was performed about the intermediate film for laminated glasses obtained by the Example and the comparative example. The results are shown in Tables 1-6.

(1) Measurement of peak temperature of tan δ of resin composition and resin Using each resin composition or resin, a test sheet having a diameter of 8 mm and a thickness of 100 μm was prepared. The dynamic viscoelasticity of the obtained test sheet was measured using a viscoelasticity measuring device (“ARES” manufactured by Rheometrics) with a shearing method according to JIS K 7244 with a strain amount of 1.0% and a frequency of 1 Hz. Under the conditions, the temperature dispersion of dynamic viscoelasticity was measured at a temperature elevation rate of 3 ° C./min to obtain a peak temperature of tan δ.

(2) Evaluation of sound insulation performance The interlayer film for laminated glass (for sound insulation measurement) thus obtained was sandwiched between two transparent float glasses (500 mm x 500 mm x 2.0 mm), and a vacuum laminator was used at 120 ° C for 30 minutes. While being held, a vacuum press was performed to produce a laminated glass.
The obtained laminated glass was measured for air sound blocking performance (acoustic transmission loss) in accordance with JIS A 1416. Based on the obtained measurement results, pass / fail at each measurement temperature was determined based on the T-3 level of the sound insulation grade shown in JIS A 4706.
Performed under 6-level measurement conditions for every 10 ° C from 0 to 50 ° C. If the pass judgment is 3 levels or higher, the overall evaluation is passed. If the pass determination is 2 levels or lower, the overall evaluation is rejected. evaluated.

(3) Evaluation of loss factor The obtained interlayer film for laminated glass (for loss factor measurement) was sandwiched between two transparent float glasses (305 mm x 30 mm x 2.0 mm), and 30 ° C at 30 ° C with a vacuum laminator. While holding for a minute, a vacuum press was performed to produce a laminated glass. Using the measuring device “SA-01” (manufactured by Rion Co., Ltd.), the loss factor of the obtained laminated glass is measured by the central excitation method in increments of 5 ° C. within a range of −10 to 60 ° C. according to JIS G 0602. did. The loss factor of the first-order mode (near 100 Hz) of the resonance frequency of the obtained loss factor was used as an evaluation index, and the peak value on the highest temperature side was taken as the evaluation result. The loss coefficient is a numerical value generally used as an index representing the vibration damping effect. The higher the numerical value, the higher the effect of damping the vibration.

(4) Evaluation of visible light transmittance and solar transmittance The transmittance of 300 to 2500 nm of the laminated glass was measured using a direct writing spectrophotometer (“UV-3100” manufactured by Shimadzu Corporation). Moreover, according to JISZ8722 and JISR3106, the visible light transmittance of 380-780 nm and the solar radiation transmittance of 300-2500 nm were calculated | required.

ADVANTAGE OF THE INVENTION According to this invention, the intermediate film for laminated glasses which is excellent in the damping property in high temperature, the sound-insulating property in a wide temperature range, and excellent in heat-insulating property can be provided. Moreover, the laminated glass which uses this intermediate film for laminated glasses can be provided.

1 Intermediate film for laminated glass 2 Site A
3 part B
4 Site C
5 Coating layer D
6 Sound insulation layer

Claims (9)

An interlayer film for laminated glass in which an intermediate layer having a portion A made of resin composition A or resin A and a portion B made of resin composition B or resin B in the horizontal direction is sandwiched between two coating layers. And
The temperature Ta at which the loss tangent of the dynamic viscoelasticity at a frequency of 1 Hz of the resin composition A or the resin A has the maximum value, and the loss tangent of the dynamic viscoelasticity at a frequency of 1 Hz of the resin composition B or the resin B are the maximum values. The difference between the temperature Tb and the coating layer is 10 ° C. or more, and the coating layer is made of a resin composition containing a polyvinyl acetal resin,
The interlayer film for laminated glass, wherein a heat ray shielding agent is contained in at least one of the part A, the part B, and the coating layer. The heat ray shielding agent is selected from the group consisting of tin-doped indium oxide fine particles, aluminum-doped zinc oxide fine particles, indium-doped zinc oxide fine particles, tin-doped zinc oxide fine particles, silicon-doped zinc oxide fine particles, lanthanum hexaboride fine particles, and cerium hexaboride fine particles. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is at least one kind of heat-shielding fine particles selected. The heat ray shielding agent is at least one heat shielding compound selected from the group consisting of diimmonium dyes, aminium dyes, phthalocyanine dyes, anthraquinone dyes, polymethine dyes, benzenethiol ammonium compounds, thiourea derivatives, and thiol metal complexes. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is laminated. The coating layer contains 20 to 50 parts by weight of a plasticizer with respect to 100 parts by weight of a polyvinyl acetal resin having 3 or 4 carbon atoms in the acetal group, a degree of acetalization of 60 to 75 mol%, and an acetyl group amount of 30 mol% or less. The interlayer film for laminated glass according to claim 1, wherein the interlayer film is made of a resin composition. Ta and Tb are -38-42 degreeC, The intermediate film for laminated glasses of Claim 1 characterized by the above-mentioned. The interlayer film for laminated glass according to claim 1, wherein the ratio of the area of the part A to the area of the part B is 9: 1 to 4: 6. The interlayer film for laminated glass according to claim 1, wherein the part A and the part B are arranged in a strip shape in the horizontal direction, and the width of each strip is 300 mm or less. Furthermore, it has the part C which consists of the resin composition C or resin C whose temperature Tc in which the loss tangent of dynamic viscoelasticity in frequency 1Hz shows the maximum value is between Ta and Tb in the horizontal direction. Item 8. The interlayer film for laminated glass according to Item 1. A laminated glass, wherein the interlayer film for laminated glass according to claim 1 is sandwiched between two transparent plates.

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