JP4339485B2 - Laminated glass interlayer film and laminated glass - Google Patents
Laminated glass interlayer film and laminated glass Download PDFInfo
- Publication number
- JP4339485B2 JP4339485B2 JP2000051665A JP2000051665A JP4339485B2 JP 4339485 B2 JP4339485 B2 JP 4339485B2 JP 2000051665 A JP2000051665 A JP 2000051665A JP 2000051665 A JP2000051665 A JP 2000051665A JP 4339485 B2 JP4339485 B2 JP 4339485B2
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- Prior art keywords
- laminated glass
- interlayer film
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- polyvinyl butyral
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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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/1055—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 laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10761—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 laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
-
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/1055—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 laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10678—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 laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising UV absorbers or stabilizers, e.g. antioxidants
-
- 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
- B32B17/10005—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 laminated safety glass or glazing
- B32B17/1055—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 laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10688—Adjustment of the adherence to the glass layers
Description
【０００１】
【発明の属する技術分野】
本発明は、合わせガラス用中間膜及びそれを用いてなる合わせガラスに関する。
【０００２】
【従来の技術】
一対のガラス板間に中間膜が挟着されてなる合わせガラスは、衝撃を受けて破損する際、破片が飛散せず安全性に優れているため、車両、航空機、建築物等の窓ガラス等に広く使用されている。
【０００３】
こうした合わせガラス用の中間膜のうち、可塑剤の添加により可塑化されたポリビニルブチラール樹脂からなる中間膜は、ガラスとの優れた接着性、強靱な引っ張り強度及び高い透明性を兼ね備えており、この中間膜を用いて得られる合わせガラスは、特に、車両用窓ガラスとして好適である。
【０００４】
上記の可塑化ポリビニルブチラール樹脂からなる合わせガラス用中間膜は、表面抵抗が１０13Ω／ｃｍ2 程度で、一般に帯電しにくく、また、ガラス板の間に挟み込んで使用するので、帯電防止性能について考慮されることは少なかった。
【０００５】
これに対し、近年では、品質に対する要求が厳しくなり、静電気による埃や異物等の付着が問題となり、優れた帯電防止性能を有する合わせガラス用中間膜が要望されている。
【０００６】
しかしながら、従来の透明プラスチックに広く利用されているような帯電防止法を合わせガラス用中間膜に適用すると、合わせガラス用中間膜とガラスとの接着性や、透明性、耐久性等が損なわれるため、適当な組み合わせが見つかっていなかった。
【０００７】
上記の問題を解決するために、特開平７−２２３８４９号公報には、帯電防止剤が練りこまれているか、塗布されている合わせガラス用中間膜が開示されているが、耐湿性、接着性等の膜の基本物性に影響を与える可能性が大きいという問題点があった。
【０００８】
【発明が解決しようとする課題】
本発明は、上記に鑑み、透明性、耐光性、耐候性、耐衝撃性、接着性等の合わせガラスに必要な基本性能を損なうことなく、かつ、湿度の高い雰囲気中に置かれた場合でも合わせガラス周縁部に剥離や白化を起こすことが少なく、帯電防止性に優れた合わせガラスを得るのに適する合わせガラス用中間膜及び合わせガラスを提供することを目的とする。
【０００９】
【課題を解決するための手段】
本発明は、ブチラール化度が６２〜７２ｍｏｌ％である可塑化ポリビニルブチラール樹脂からなる合わせガラス用中間膜であって、上記可塑化ポリビニルブチラール樹脂は、ポリビニルブチラール樹脂１００重量部に対して、下記一般式（１）で表される化合物を０．０５〜３重量部、下記一般式（２）で表される化合物を０．０５〜３重量部及び炭素数４〜１２のカルボン酸のカリウム塩を０．００５〜０．５重量部添加してなる合わせガラス用中間膜である。
Ｒ1 −Ｏ−（ＣＨ2 ＣＨ2 Ｏ）ｍＨ （１）
式中、Ｒ1 は、炭素数１〜２５の炭化水素基を表し、ｍは、１〜２０の整数を表す。
Ｒ2 −Ｏ−（ＣＨ2 ＣＨ2 ＣＨ2 Ｏ）ｎＨ （２）
式中、Ｒ2 は、炭素数１〜２５の炭化水素基を表し、ｎは、１〜２０の整数を表す。
以下に、本発明を詳述する。
【００１０】
本発明の合わせガラス用中間膜は、ブチラール化度が６２〜７２ｍｏｌ％である可塑化ポリビニルブチラール樹脂からなる。
上記可塑化ポリビニルブチラール樹脂のブチラール化度が６２ｍｏｌ％未満であると、得られる合わせガラス用中間膜の吸水性が高くなり、白化が起こりやすくなる。７２ｍｏｌ％を超えると、得られる合わせガラス用中間膜の機械的強度が低下するので、これを用いた合わせガラスの耐貫通強度が低下する。上記可塑化ポリビニルブチラール樹脂のブチラール化度は、好ましくは、６３．５〜７０ｍｏｌ％である。
【００１１】
上記可塑化ポリビニルブチラール樹脂を構成するポリビニルブチラール樹脂の製造方法としては特に限定されず、公知の方法を採用することができるが、例えば、ポリビニルアルコールを熱水に溶解し、得られた水溶液を１０〜２０℃に保持しておいて、これにブチルアルデヒドと酸触媒とを加えてアセタール化を進行させ、次いで、反応液を７０℃に昇温して保持した後、中和、水洗及び乾燥の諸行程を経てポリビニルブチラール樹脂粉末を得る方法等が挙げられる。
【００１２】
ポリビニルブチラール樹脂の原料に用いられるポリビニルアルコールとしては特に限定されないが、平均重合度１０００〜２５００のものが好ましい。ポリビニルアルコールの平均重合度が１０００未満であると、得られる合わせガラス用中間膜の強度が低下するので、これを用いた合わせガラスの耐貫通強度や衝撃エネルギー吸収性が低下することがある。平均重合度が２５００を超えると、得られる合わせガラス用中間膜の強度が強くなりすぎて、合わせガラスとしたときの耐貫通性や衝撃エネルギー吸収性が不充分となることがある。
【００１３】
上記ポリビニルアルコールは、ポリ酢酸ビニルをけん化して得られるものである。得られる合わせガラス用中間膜の透明性、耐熱性、耐光性を良好にするためには、上記ポリビニルアルコールのけん化度は、９５ｍｏｌ％以上であることが好ましい。
【００１４】
本発明の合わせガラス用中間膜において、可塑化ポリビニルブチラール樹脂は、ポリビニルブチラール樹脂１００重量部に対して、一般式（１）で表される化合物を０．０５〜３重量部、一般式（２）で表される化合物を０．０５〜３重量部及び炭素数４〜１２のカルボン酸のカリウム塩を０．００５〜０．５重量部添加してなる。
【００１５】
本発明の合わせガラス用中間膜において、上記一般式（１）で表される化合物は、膜中で静電気（電荷）を分散、伝導させ、帯電性を防ぐ効果を有している。
上記一般式（１）で表される化合物の炭化水素基（Ｒ1 ）の炭素数が２５を超えると、得られる合わせガラス用中間膜の表面に過剰のブリード現象が起こり、接着力に悪影響を及ぼし、かつ、帯電防止効果が低下する。上記一般式（１）で表される化合物において、Ｒ1 の炭素数は、好ましくは、４〜２０である。
また、ｍの値が２０を超えると、得られる合わせガラス用中間膜の耐湿性が低下する。ｍの値は、好ましくは、２〜１０である。
【００１６】
上記一般式（１）で表される化合物としては、例えば、ドデシロキシジエチレングリコール、ドデシロキシトリエチレングリコール、メトキシテトラエチレングリコール、ペンチロキシヘキサエチレングリコール、３，３−ジプロピルブトキシテトラエチレングリコール、２，２−ジエチルブトキシテトラエチレングリコール、フェノキシヘキサエチレングリコール、１，５−ジエチルフェノキシオクタエチレングリコール等が挙げられる。これらは単独で用いられてもよく、２種類以上が併用されてもよい。
【００１７】
上記一般式（１）で表される化合物の添加量が、ポリビニルブチラール樹脂１００重量部に対して０．０５重量部未満であると、帯電防止効果が低下する。３重量部を超えると、得られる合わせガラス用中間膜の耐湿性が低下する。好ましくは、ポリビニルブチラール樹脂１００重量部に対して０．１〜 ２重量部である。
【００１８】
上記一般式（２）で表される化合物は、一般式（１）で表される化合物と相互作用し、その帯電防止効果を増加させる役割を担う。
上記一般式（２）で表される化合物の炭化水素基（Ｒ2 ）の炭素数が２５を超えると、得られる合わせガラス用中間膜の表面に過剰のブリード現象が起こり、接着力に悪影響を及ぼし、かつ、帯電防止効果が低下する。一般式（２）で表される化合物において、Ｒ2 の炭素数は、好ましくは、４〜２０である。
また、ｎの値が２０を超えると、得られる合わせガラス用中間膜の耐湿性が低下する。ｎの値は、好ましくは、２〜１０である。
【００１９】
上記一般式（２）で表される化合物としては、例えば、ドデシロキシトリプロピレングリコール、メトキシテトラプロピレングリコール、ペンチロキシヘキサプロピレングリコール、３，３−ジプロピルブトキシテトラプロピレングリコール、２，２−ジエチルブトキシテトラプロピレングリコール、フェノキシヘキサプロピレングリコール、１，５−ジエチルフェノキシオクタプロピレングリコール等が挙げられる。これらは単独で用いられてもよく、２種類以上が併用されてもよい。
【００２０】
上記一般式（２）で表される化合物の添加量が、ポリビニルブチラール樹脂１００重量部に対して０．０５重量部未満であると、帯電防止効果が低下する。３重量部を超えると、得られる合わせガラス用中間膜の耐湿性が低下する。好ましくは、ポリビニルブチラール樹脂１００重量部に対して０．１〜２重量部である。
【００２１】
本発明の合わせガラス用中間膜に用いられる、上記炭素数４〜１２のカルボン酸のカリウム塩は、膜中で静電気（電荷）を分散、伝導させて帯電を防ぐ効果を有している。
【００２２】
上記カルボン酸のカリウム塩において、カルボン酸の炭素数が４未満であると、膜中で粒子の凝集が起こり、帯電防止効果が低下する。１２を超えると、カルボン酸のカリウム塩が膜表面に過度に偏析し、接着力の経時変化を引き起こす。
カルボン酸の炭素数は、好ましくは、６〜１２である。
【００２３】
上記炭素数４〜１２のカルボン酸のカリウム塩としては、例えば、ブタン酸カリウム、イソブチル酸カリウム、２−エチル酪酸カリウム、ヘキサン酸カリウム、２−エチルヘキサン酸カリウム、オクタン酸カリウム、デカン酸カリウム、ドデシル酸カリウム、シュウ酸カリウム、マロン酸カリウム、コハク酸カリウム、グルタル酸カリウム、アジピン酸カリウム等が挙げられる。これらは単独で用いられてもよく、２種類以上が併用されてもよい。
【００２４】
上記炭素数４〜１２のカルボン酸のカリウム塩の添加量が、ポリビニルブチラール樹脂１００重量部に対して０．００５重量部未満であると、帯電防止効果が低下する。０．５重量部を超えると、得られる合わせガラス用中間膜の耐湿性が低下する。
好ましくは、ポリビニルブチラール樹脂１００重量部に対して０．０１〜０．３重量部である。
【００２５】
また、本発明の合わせガラス用中間膜に用いられる可塑化ポリビニルブチラール樹脂は、ポリビニルブチラール樹脂が、可塑剤により可塑化されたものである。上記可塑剤としては特に限定されず、例えば、一塩基酸エステル系、多塩基酸エステル系等の有機エステル系可塑剤；有機リン酸系、有機亜リン酸系等のリン酸系可塑剤等が挙げられる。
【００２６】
上記一塩基酸エステル系可塑剤としては特に限定されず、例えば、トリエチレングリコール、トリプロピレングリコール、テトラエチレングリコール等のグリコールと酪酸、イソ酪酸、カプロン酸、２−エチル酪酸、ヘプタン酸、２−エチルヘキシル酸等の有機酸との反応によって得られたグリコール系エステル等が挙げられる。
【００２７】
上記多塩基酸エステル系可塑剤としては特に限定されず、例えば、炭素数４〜８の直鎖状又は分岐状アルコールとアジピン酸、セバチン酸、アゼライト酸等の有機酸との反応によって得られるエステル等が挙げられる。
上記リン酸系可塑剤としては特に限定されず、例えば、トリブトキシエチルフォスフェート、イソデシルフェニルフォスフェート等が挙げられる。
【００２８】
上記各種可塑剤の中でも、例えば、トリエチレングリコール−ジ−２−エチルブチレート（３ＧＨ）、トリエチレングリコール−ジ−２−エチルヘキサノエート（３ＧＯ）、トリエチレングリコール−ジ−ｎ−ヘプタノエート（３Ｇ７）、トリエチレングリコールジカプリレート、トリエチレングリコール−ジ−ｎ−オクタノエート、テトラエチレングリコール−ジ−２−エチルブチレート、テトラエチレングリコール−ジ−ｎ−ヘプタノエート、ジヘキシルアジペート、ジベンジルフタレート等が好ましい。より好ましくは、３ＧＨ、３ＧＯ、３Ｇ７等である。
上記可塑剤は単独で用いられてもよく、２種類以上が併用されてもよい。
【００２９】
ポリビニルブチラール樹脂に対する可塑剤の添加量としては特に限定されないが、ポリビニルブチラール樹脂１００重量部に対して、可塑剤３０〜７０重量部であることが好ましい。３０重量部未満であると、ポリビニルブチラール樹脂の可塑化が不充分となることがある。７０重量部を超えると、合わせガラス用中間膜の機械的強度が低減するので耐衝撃性が劣り、合わせガラス用中間膜とガラスとの接着力が不充分となることがある。
【００３０】
また、本発明の合わせガラス用中間膜には、その他必要に応じて、ポリビニルブチラール樹脂の劣化を防止するための安定剤、酸化防止剤、紫外線吸収剤、接着力調整剤等の添加剤が本発明の合わせガラス用中間膜の特性を損なわない範囲で添加されてもよい。
【００３１】
上記安定剤としては特に限定されず、例えば、ラウリル硫酸ナトリウム、アルキルベンゼンスルホン酸等の界面活性剤等が挙げられる。
上記酸化防止剤としては特に限定されず、例えば、ｔ−ブチルヒドロキシトルエン（ＢＨＴ）、テトラキス−〔メチレン−３−（３’，５’−ジ−ｔ−ブチル−４’−ヒドロキシフェニル）プロピオネート〕メタン（チバガイギー社製、商品名：イルガノックス１０１０）等が挙げられる。
【００３２】
上記紫外線吸収剤としては特に限定されず、例えば、２−（２’−ヒドロキシ−５’−メチルフェニル）ベンゾトリアゾール（チバガイギー社製、商品名：チヌビンＰ）、２−（２’−ヒドロキシ−３’，５’−ジ−ｔ−ブチルフェニル）ベンゾトリアゾール（チバガイギー社製、商品名：チヌビン３２０）、２−（２’−ヒドロキシ−３’−ｔ−ブチル−５’−メチルフェニル）−５−クロロベンゾトリアゾール（チバガイギー社製、商品名：チヌビン３２６）、２−（２’−ヒドロキシ−３’，５’−ジ−アミルフェニル）ベンゾトリアゾール（チバガイギー社製、商品名：チヌビン３２８）等のベンゾトリアゾール系のもの；アデカアーガス社製の商品名ＬＡ−５７等のヒンダードアミン系のもの等が挙げられる。
【００３３】
本発明の合わせガラス用中間膜において、膜全体の厚みは、通常の合わせガラス用中間膜としての厚みである０．３〜１．６ｍｍが好ましい。
本発明の合わせガラス用中間膜の製造方法としては特に限定されず、例えば、ポリビニルブチラール樹脂、一般式（１）で表される化合物、一般式（２）で表される化合物、炭素数４〜１２のカルボン酸の金属塩、可塑剤及び必要に応じて添加される添加剤をミキシングロールに供給し、混練して得られた混練物を、プレス成形機、カレンダーロール、押し出し機等でシート状に成形することにより、可塑化ポリビニルブチラール樹脂からなる合わせガラス用中間膜を製造することができる。
【００３４】
また、少なくとも一対のガラス板間に、本発明の合わせガラス用中間膜を介在させ、一体化させることにより、合わせガラスを製造することができる。本発明の合わせガラス用中間膜を用いてなる合わせガラスもまた本発明の１つである。
【００３５】
本発明の合わせガラスの製造方法としては特に限定されず、従来用いられている方法を採用することができ、例えば、本発明の合わせガラス用中間膜をその両側からガラス板で挟み込み、この挟着体を真空バッグに入れて、真空にしたままオーブン内で９０℃で３０分間保持し、真空バッグから出した挟着体を、オートクレーブ内で圧力１．３ＭＰａ、温度１４０℃にて熱圧プレスすることにより透明な合わせガラスを得ることができる。
【００３６】
上記ガラス板としては特に限定されず、例えば、フロート板ガラス、磨き板ガラス、型板ガラス、網入り板ガラス、線入り板ガラス、熱線吸収板ガラス、着色された板ガラス等の各種無機ガラス又は有機ガラス等が挙げられる。これらは単独で用いられてもよく、２種以上を併用してもよい。
【００３７】
本発明の合わせガラス用中間膜は、ガラス以外の剛性の高い透明体で挟着されてもよい。上記透明体としては、例えば、ポリカーボネート樹脂よりなるもの等が挙げられる。このような構成体もまた本発明の１つである。
【００３８】
本発明の合わせガラス用中間膜及び合わせガラスは、上述のような構成を有することにより、透明性、耐光性、耐候性、耐衝撃性、接着性等の合わせガラスに必要な基本性能を損なわず、かつ、湿度の高い雰囲気中に置かれた場合でも合わせガラス周縁部に剥離や白化を起こすことが少なく、帯電防止性に優れている。
【００３９】
【実施例】
以下に実施例を挙げて本発明を更に詳細に説明するが、本発明はこれらの実施例のみに限定されるものではない。
【００４０】
実施例１
（ポリビニルブチラール樹脂の合成）
イオン交換水２９００重量部、平均重合度１７００、けん化度９９．２ｍｏｌ％のポリビニルアルコール１９８重量部（ビニルアルコール４．５ｍｏｌ相当量）を攪拌装置付き反応器に供給し、攪拌しながら９５℃に加熱して溶解した。この溶液を３０℃に冷却し、３５重量％塩酸２０８重量部（２．１ｍｏｌ）とｎ−ブチルアルデヒド１５２重量部（２．１ｍｏｌ）とを加え、次いで液温を２℃に下げてこの温度を保持し、ポリビニルブチラール樹脂が析出した後、液温を３０℃に昇温して５時間保持した。保持した後、炭酸水素ナトリウム１５６重量部（１．８ｍｏｌ）を加えて中和し、水洗及び乾燥を行いブチラール化度６９ｍｏｌ％のポリビニルブチラール樹脂を得た。
【００４１】
（合わせガラス用中間膜の作製）
得られたポリビニルブチラール樹脂１００重量部、可塑剤としてトリエチレングリコールジ−２−エチルヘキサノエート（３ＧＯ）を３９重量部、２−エチル酪酸マグネシウム（Ｃ６Ｍｇ）を０．０２重量部、酢酸マグネシウム（Ｃ２Ｍｇ）を０．０１重量部、２−エチルヘキサン酸カリウム０．０３重量部、及び、ドデシロキシトリエチレングリコール０．５重量部をミキシングロールに供給し、混練して得られた混練物をプレス成形機にて１５０℃、１０ＭＰａの条件で３０分間プレス成形し、可塑化ポリビニルブチラール樹脂からなる厚さ０．８ｍｍの合わせガラス用中間膜を得た。この合わせガラス用中間膜を用いて、下記の方法により、膜の表面抵抗を測定した。結果を表３に示した。
【００４２】
（合わせガラスの作製）
得られた合わせガラス用中間膜を用いて、一辺が３０ｃｍである正方形の厚み２．５ｍｍのフロート板ガラス２枚で両側から挟着し、この挟着体を真空バッグへ入れ、２．７ｋＰａの真空度で２０分間保持し、真空状態のまま９０℃のオーブンに移し、この温度を３０分間保持した。こうして真空プレスにより仮接着した挟着体を、次いでオートクレーブ内で圧力１．３ＭＰａ、温度１５０℃にて熱圧着し、透明な合わせガラスを作製した。得られた合わせガラスについて、下記の方法で接着性試験（パンメル試験）、耐湿（耐白化）性試験を行った。結果を表３に示した。
【００４３】
（１）接着性（パンメル）試験
合わせガラス用中間膜のガラスに対する接着性は、パンメル値で評価した。
合わせガラスを−１８±０．６℃の温度に１６時間放置して調整し、これを頭部が０．４５ｋｇのハンマーで打ってガラスの粒径が６ｍｍ以下になるまで粉砕した。ガラスが部分剥離した後の中間膜の露出度を、表１に示すように、あらかじめグレード付けした限度見本で判定し、パンメル値とした。
なお、パンメル値は、初期値及び合わせガラスを５０℃で４週間放置した後の値を測定した。
上記パンメル値が大きいほど、合わせガラス用中間膜とガラスとの接着性が大きく、パンメル値が小さいほど合わせガラス用中間膜とガラスとの接着力も小さい。
【００４４】
【表１】
（２）耐湿（耐白化）性試験
合わせガラスを８０℃、相対湿度９５％の環境に２週間放置後、取り出してすぐに、合わせガラスの端部からの白化距離（白化している部分の距離）を、測定した。
【００４６】
（３）表面抵抗測定
得られた合わせガラス用中間膜を２４時間デシケーター内で乾燥させ、表面抵抗測定装置（東亜電波工業社製、ＤＳＭ−８１０３）にて表面抵抗を測定した。
【００４７】
実施例２〜３、及び、比較例１〜９
表２に示されるような配合で、実施例１と同様に合わせガラス用中間膜を作製し、表面抵抗を測定した。また、この合わせガラス用中間膜を用いて、実施例１と同様に合わせガラスを作製し、評価を行った。結果を表３に示した。
【００４８】
【表２】
なお、表２中の記載は、以下のとおりである。
ＰＶＢ樹脂：ポリビニルブチラール樹脂
Ｂｕ化度：ブチラール化度
３ＧＯ：トリエチレングリコール−ジ−２−エチルヘキサノエート
４Ｇ７：テトラエチレングリコール−ジ−ｎ−ヘプタノエート
Ｃ６Ｍｇ：２−エチル酪酸マグネシウム
Ｃ２Ｍｇ：酢酸マグネシウム
Ｃ２Ｋ：酢酸カリウム
Ｐｈｅ：フェニル基
【００５０】
【表３】
表３より、実施例で作製した合わせガラス用中間膜は、ガラスとの接着性、耐湿性に優れているので、耐衝撃性及び耐湿性に優れた合わせガラスを作製することができた。更に、膜の表面抵抗が小さいので、帯電防止性にも優れていた。一方、比較例で作製した合わせガラス用中間膜は、耐湿性及び帯電防止性の双方において優れるものではなかった。
【００５２】
【発明の効果】
本発明の合わせガラス用中間膜は、上述のような構成からなるので、接着性が安定しており、耐湿性に優れ、かつ、帯電防止性にも優れている。そのため、本発明の合わせガラス用中間膜は、建築用、車両用の合わせガラス用中間膜として好適に用いられる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interlayer film for laminated glass and a laminated glass using the same.
[0002]
[Prior art]
Laminated glass with an interlayer film sandwiched between a pair of glass plates has excellent safety because it does not scatter when it is damaged by impact, so window glass for vehicles, aircraft, buildings, etc. Widely used.
[0003]
Among these interlayer films for laminated glass, an interlayer film made of polyvinyl butyral resin plasticized by the addition of a plasticizer has excellent adhesion to glass, tough tensile strength, and high transparency. Laminated glass obtained using an interlayer film is particularly suitable as a window glass for vehicles.
[0004]
The interlayer film for laminated glass made of the above-mentioned plasticized polyvinyl butyral resin has a surface resistance of about 10 13 Ω / cm 2 , is generally difficult to be charged, and is used by being sandwiched between glass plates. There were few things.
[0005]
On the other hand, in recent years, quality requirements have become stricter, and adhesion of dust and foreign matters due to static electricity has become a problem, and an interlayer film for laminated glass having excellent antistatic performance has been demanded.
[0006]
However, if the antistatic method widely used for conventional transparent plastics is applied to the interlayer film for laminated glass, the adhesion, transparency, durability, etc. between the interlayer film for laminated glass and glass are impaired. No suitable combination was found.
[0007]
In order to solve the above problem, Japanese Patent Application Laid-Open No. 7-223849 discloses an interlayer film for laminated glass in which an antistatic agent is kneaded or applied. However, moisture resistance, adhesiveness are disclosed. There is a problem that there is a large possibility of affecting the basic physical properties of the film.
[0008]
[Problems to be solved by the invention]
In view of the above, the present invention does not impair the basic performance required for laminated glass such as transparency, light resistance, weather resistance, impact resistance, and adhesiveness, and even when placed in a humid atmosphere. An object of the present invention is to provide an interlayer film for laminated glass and a laminated glass which are suitable for obtaining a laminated glass excellent in antistatic properties with less peeling and whitening at the peripheral edge of the laminated glass.
[0009]
[Means for Solving the Problems]
The present invention is an interlayer film for laminated glass made of a plasticized polyvinyl butyral resin having a butyralization degree of 62 to 72 mol%, and the plasticized polyvinyl butyral resin has the following general properties with respect to 100 parts by weight of the polyvinyl butyral resin. 0.05 to 3 parts by weight of a compound represented by the formula (1), 0.05 to 3 parts by weight of a compound represented by the following general formula (2) and a potassium salt of a carboxylic acid having 4 to 12 carbon atoms. It is an interlayer film for laminated glass formed by adding 0.005 to 0.5 parts by weight.
R 1 -O- (CH 2 CH 2 O) mH (1)
In the formula, R 1 represents a hydrocarbon group having 1 to 25 carbon atoms, and m represents an integer of 1 to 20.
R 2 -O- (CH 2 CH 2 CH 2 O) nH (2)
In the formula, R 2 represents a hydrocarbon group having 1 to 25 carbon atoms, and n represents an integer of 1 to 20.
The present invention is described in detail below.
[0010]
The interlayer film for laminated glass of the present invention comprises a plasticized polyvinyl butyral resin having a butyralization degree of 62 to 72 mol%.
When the degree of butyralization of the plasticized polyvinyl butyral resin is less than 62 mol%, the water-absorbing property of the resulting interlayer film for laminated glass increases, and whitening tends to occur. When it exceeds 72 mol%, the mechanical strength of the interlayer film for laminated glass to be obtained is lowered, so that the penetration resistance of the laminated glass using this is lowered. The degree of butyralization of the plasticized polyvinyl butyral resin is preferably 63.5 to 70 mol%.
[0011]
The method for producing the polyvinyl butyral resin constituting the plasticized polyvinyl butyral resin is not particularly limited, and a known method can be adopted. For example, polyvinyl alcohol is dissolved in hot water, and the obtained aqueous solution is 10%. The temperature is kept at -20 ° C, butyraldehyde and an acid catalyst are added to advance acetalization, and then the reaction solution is heated to 70 ° C and kept, and then neutralized, washed with water and dried. The method etc. which obtain polyvinyl butyral resin powder through various processes are mentioned.
[0012]
Although it does not specifically limit as polyvinyl alcohol used for the raw material of polyvinyl butyral resin, A thing with an average degree of polymerization of 1000-2500 is preferable. When the average degree of polymerization of polyvinyl alcohol is less than 1000, the strength of the resulting interlayer film for laminated glass is lowered, so that the penetration resistance and impact energy absorption of the laminated glass using this may be lowered. If the average degree of polymerization exceeds 2500, the strength of the resulting interlayer film for laminated glass becomes too strong, and the penetration resistance and impact energy absorption when used as laminated glass may be insufficient.
[0013]
The polyvinyl alcohol is obtained by saponifying polyvinyl acetate. In order to improve the transparency, heat resistance, and light resistance of the obtained interlayer film for laminated glass, the saponification degree of the polyvinyl alcohol is preferably 95 mol% or more.
[0014]
In the interlayer film for laminated glass of the present invention, the plasticized polyvinyl butyral resin is 0.05 to 3 parts by weight of the compound represented by the general formula (1) with respect to 100 parts by weight of the polyvinyl butyral resin. ) And 0.05 to 3 parts by weight of a compound represented by) and 0.005 to 0.5 parts by weight of a potassium salt of a carboxylic acid having 4 to 12 carbon atoms.
[0015]
In the interlayer film for laminated glass of the present invention, the compound represented by the general formula (1) has an effect of dispersing and conducting static electricity (charge) in the film and preventing chargeability.
When the number of carbon atoms of the hydrocarbon group (R 1 ) of the compound represented by the general formula (1) exceeds 25, an excessive bleeding phenomenon occurs on the surface of the interlayer film for laminated glass obtained, which adversely affects the adhesive strength. And the antistatic effect is reduced. In the compound represented by the general formula (1), R 1 preferably has 4 to 20 carbon atoms.
Moreover, when the value of m exceeds 20, the moisture resistance of the intermediate film for laminated glasses obtained will fall. The value of m is preferably 2-10.
[0016]
Examples of the compound represented by the general formula (1) include dodecyloxydiethylene glycol, dodecyloxytriethylene glycol, methoxytetraethylene glycol, pentyloxyhexaethylene glycol, 3,3-dipropylbutoxytetraethylene glycol, Examples include 2,2-diethylbutoxytetraethylene glycol, phenoxyhexaethylene glycol, and 1,5-diethylphenoxyoctaethylene glycol. These may be used alone or in combination of two or more.
[0017]
When the amount of the compound represented by the general formula (1) is less than 0.05 parts by weight with respect to 100 parts by weight of the polyvinyl butyral resin, the antistatic effect is lowered. When it exceeds 3 parts by weight, the moisture resistance of the interlayer film for laminated glass obtained is lowered. Preferably, it is 0.1-2 weight part with respect to 100 weight part of polyvinyl butyral resin.
[0018]
The compound represented by the general formula (2) interacts with the compound represented by the general formula (1) and plays a role of increasing the antistatic effect thereof.
When the number of carbon atoms of the hydrocarbon group (R 2 ) of the compound represented by the general formula (2) exceeds 25, an excessive bleeding phenomenon occurs on the surface of the interlayer film for laminated glass to be obtained, and the adhesive force is adversely affected. And the antistatic effect is reduced. In the compound represented by the general formula (2), R 2 preferably has 4 to 20 carbon atoms.
Moreover, when the value of n exceeds 20, the moisture resistance of the intermediate film for laminated glasses obtained will fall. The value of n is preferably 2-10.
[0019]
Examples of the compound represented by the general formula (2) include dodecyloxytripropylene glycol, methoxytetrapropylene glycol, pentyloxyhexapropylene glycol, 3,3-dipropylbutoxytetrapropylene glycol, and 2,2-diethyl. Examples include butoxytetrapropylene glycol, phenoxyhexapropylene glycol, and 1,5-diethylphenoxyoctapropylene glycol. These may be used alone or in combination of two or more.
[0020]
When the amount of the compound represented by the general formula (2) is less than 0.05 parts by weight with respect to 100 parts by weight of the polyvinyl butyral resin, the antistatic effect is lowered. When it exceeds 3 parts by weight, the moisture resistance of the interlayer film for laminated glass obtained is lowered. Preferably, it is 0.1-2 weight part with respect to 100 weight part of polyvinyl butyral resin.
[0021]
The potassium salt of a carboxylic acid having 4 to 12 carbon atoms used for the interlayer film for laminated glass of the present invention has an effect of preventing static charge by dispersing and conducting static electricity (charge) in the film.
[0022]
In the carboxylic acid potassium salt, if the carboxylic acid has less than 4 carbon atoms, particles are aggregated in the film, and the antistatic effect is reduced. If it exceeds 12, the potassium salt of carboxylic acid is excessively segregated on the film surface, causing a change in the adhesive force with time.
The carbon number of the carboxylic acid is preferably 6-12.
[0023]
Examples of the potassium salt of a carboxylic acid having 4 to 12 carbon atoms include potassium butanoate, potassium isobutyrate, potassium 2-ethylbutyrate, potassium hexanoate, potassium 2-ethylhexanoate, potassium octoate, potassium decanoate, Examples include potassium dodecylate, potassium oxalate, potassium malonate, potassium succinate, potassium glutarate, and potassium adipate. These may be used alone or in combination of two or more.
[0024]
When the amount of the potassium salt of carboxylic acid having 4 to 12 carbon atoms is less than 0.005 parts by weight with respect to 100 parts by weight of the polyvinyl butyral resin, the antistatic effect is lowered. When it exceeds 0.5 part by weight, the moisture resistance of the interlayer film for laminated glass obtained is lowered.
Preferably, it is 0.01-0.3 weight part with respect to 100 weight part of polyvinyl butyral resin.
[0025]
Moreover, the plasticized polyvinyl butyral resin used for the interlayer film for laminated glass of the present invention is obtained by plasticizing a polyvinyl butyral resin with a plasticizer. The plasticizer is not particularly limited, and examples thereof include organic ester plasticizers such as monobasic acid esters and polybasic acid esters; phosphoric acid plasticizers such as organic phosphoric acids and organic phosphorous acids. Can be mentioned.
[0026]
The monobasic ester plasticizer is not particularly limited, and examples thereof include glycols such as triethylene glycol, tripropylene glycol, and tetraethylene glycol, butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptanoic acid, 2- Examples thereof include glycol esters obtained by reaction with an organic acid such as ethylhexyl acid.
[0027]
The polybasic acid ester plasticizer is not particularly limited. For example, an ester obtained by reacting a linear or branched alcohol having 4 to 8 carbon atoms with an organic acid such as adipic acid, sebacic acid, or azelitic acid. Etc.
The phosphoric acid plasticizer is not particularly limited, and examples thereof include tributoxyethyl phosphate and isodecylphenyl phosphate.
[0028]
Among the various plasticizers, for example, triethylene glycol-di-2-ethylbutyrate (3GH), triethylene glycol-di-2-ethylhexanoate (3GO), triethylene glycol-di-n-heptanoate ( 3G7), triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, tetraethylene glycol di-2-ethylbutyrate, tetraethylene glycol di-n-heptanoate, dihexyl adipate, dibenzyl phthalate, etc. preferable. More preferred are 3GH, 3GO, 3G7 and the like.
The said plasticizer may be used independently and 2 or more types may be used together.
[0029]
The amount of the plasticizer added to the polyvinyl butyral resin is not particularly limited, but it is preferably 30 to 70 parts by weight of the plasticizer with respect to 100 parts by weight of the polyvinyl butyral resin. If it is less than 30 parts by weight, the plasticization of the polyvinyl butyral resin may be insufficient. If it exceeds 70 parts by weight, the mechanical strength of the interlayer film for laminated glass is reduced, so that the impact resistance is inferior, and the adhesive force between the interlayer film for laminated glass and the glass may be insufficient.
[0030]
In addition, the interlayer film for laminated glass of the present invention contains additives such as stabilizers, antioxidants, ultraviolet absorbers, adhesive strength modifiers and the like for preventing deterioration of the polyvinyl butyral resin as necessary. You may add in the range which does not impair the characteristic of the intermediate film for laminated glasses of invention.
[0031]
The stabilizer is not particularly limited, and examples thereof include surfactants such as sodium lauryl sulfate and alkylbenzene sulfonic acid.
The antioxidant is not particularly limited. For example, t-butylhydroxytoluene (BHT), tetrakis- [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate] Methane (product name: Irganox 1010) manufactured by Ciba-Geigy Co.
[0032]
It does not specifically limit as said ultraviolet absorber, For example, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole (the Ciba Geigy company make, brand name: Tinuvin P), 2- (2'-hydroxy-3) ', 5'-di-t-butylphenyl) benzotriazole (manufactured by Ciba Geigy, trade name: Tinuvin 320), 2- (2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5 Benzo such as chlorobenzotriazole (Ciba Geigy, trade name: Tinuvin 326), 2- (2′-hydroxy-3 ′, 5′-di-amylphenyl) benzotriazole (Ciba Geigy, trade name: Tinuvin 328) Examples include triazole-based ones; hindered amine-based ones such as trade name LA-57 manufactured by Adeka Argus.
[0033]
In the interlayer film for laminated glass of the present invention, the thickness of the entire film is preferably 0.3 to 1.6 mm, which is the thickness as a normal interlayer film for laminated glass.
It does not specifically limit as a manufacturing method of the intermediate film for laminated glasses of this invention, For example, polyvinyl butyral resin, the compound represented by General formula (1), the compound represented by General formula (2), C4-C4 A metal salt of 12 carboxylic acids, a plasticizer, and additives added as needed are supplied to a mixing roll, and the kneaded product obtained by kneading is formed into a sheet by a press molding machine, a calender roll, an extruder, etc. By molding into an intermediate film for laminated glass made of plasticized polyvinyl butyral resin.
[0034]
Moreover, a laminated glass can be manufactured by interposing and integrating the interlayer film for laminated glass of the present invention between at least a pair of glass plates. Laminated glass using the interlayer film for laminated glass of the present invention is also one aspect of the present invention.
[0035]
The method for producing the laminated glass of the present invention is not particularly limited, and a conventionally used method can be employed. For example, the interlayer film for laminated glass of the present invention is sandwiched between glass plates from both sides, and this sandwiching is performed. The body is put in a vacuum bag and kept in an oven at 90 ° C. for 30 minutes in a vacuum, and the sandwiched body taken out of the vacuum bag is hot-pressed at a pressure of 1.3 MPa and a temperature of 140 ° C. in an autoclave. A transparent laminated glass can be obtained.
[0036]
It does not specifically limit as said glass plate, For example, various inorganic glass or organic glasses, such as float plate glass, polished plate glass, plate plate glass, net plate glass, wire plate glass, heat ray absorption plate glass, and colored plate glass, are mentioned. These may be used independently and may use 2 or more types together.
[0037]
The interlayer film for laminated glass of the present invention may be sandwiched between transparent bodies having high rigidity other than glass. As said transparent body, what consists of polycarbonate resin etc. are mentioned, for example. Such a structure is also one aspect of the present invention.
[0038]
The interlayer film for laminated glass and laminated glass of the present invention have the above-described configuration, so that the basic performance required for laminated glass such as transparency, light resistance, weather resistance, impact resistance, and adhesiveness is not impaired. Even when placed in a humid atmosphere, the peripheral edge of the laminated glass is less likely to be peeled off or whitened, and is excellent in antistatic properties.
[0039]
【Example】
The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
[0040]
Example 1
(Synthesis of polyvinyl butyral resin)
2900 parts by weight of ion-exchanged water, 198 parts by weight of polyvinyl alcohol having an average degree of polymerization of 1700 and a degree of saponification of 99.2 mol% (equivalent to 4.5 mol of vinyl alcohol) are supplied to a reactor equipped with a stirrer and heated to 95 ° C. while stirring And dissolved. The solution was cooled to 30 ° C., 208 parts by weight (2.1 mol) of 35 wt% hydrochloric acid and 152 parts by weight (2.1 mol) of n-butyraldehyde were added, and then the temperature of the solution was lowered to 2 ° C. After the polyvinyl butyral resin was deposited, the liquid temperature was raised to 30 ° C. and held for 5 hours. After being held, 156 parts by weight (1.8 mol) of sodium hydrogen carbonate was added to neutralize, washed with water and dried to obtain a polyvinyl butyral resin having a butyralization degree of 69 mol%.
[0041]
(Preparation of interlayer film for laminated glass)
100 parts by weight of the obtained polyvinyl butyral resin, 39 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, 0.02 parts by weight of magnesium 2-ethylbutyrate (C6Mg), magnesium acetate ( C2Mg) is added to 0.01 parts by weight, potassium 2-ethylhexanoate 0.03 parts by weight, and 0.5 parts by weight of dodecyloxytriethylene glycol are supplied to a mixing roll, and the kneaded product obtained by kneading is mixed. It was press-molded for 30 minutes at 150 ° C. and 10 MPa with a press molding machine to obtain a 0.8 mm-thick interlayer film for laminated glass made of plasticized polyvinyl butyral resin. Using this interlayer film for laminated glass, the surface resistance of the film was measured by the following method. The results are shown in Table 3.
[0042]
(Production of laminated glass)
The obtained interlayer film for laminated glass was sandwiched from both sides by two float plate glasses having a square thickness of 2.5 mm each having a side of 30 cm, and the sandwiched body was put into a vacuum bag and a vacuum of 2.7 kPa. The temperature was held for 20 minutes, and transferred to a 90 ° C. oven under vacuum, and this temperature was held for 30 minutes. The sandwiched body temporarily bonded by the vacuum press was then thermocompression bonded at a pressure of 1.3 MPa and a temperature of 150 ° C. in an autoclave to produce a transparent laminated glass. About the obtained laminated glass, the adhesiveness test (Panmel test) and the moisture resistance (whitening resistance) test were done by the following method. The results are shown in Table 3.
[0043]
(1) Adhesion (Pummel) Test The adhesion of the interlayer film for laminated glass to glass was evaluated by the pummel value.
The laminated glass was adjusted by allowing it to stand at a temperature of −18 ± 0.6 ° C. for 16 hours, and this was crushed with a hammer having a head of 0.45 kg until the particle size of the glass became 6 mm or less. As shown in Table 1, the degree of exposure of the intermediate film after the glass was partially peeled was determined using a limit sample that had been graded in advance, and was defined as a Pummel value.
In addition, the panmel value measured the initial value and the value after leaving a laminated glass at 50 degreeC for 4 weeks.
The greater the Pummel value, the greater the adhesion between the interlayer film for laminated glass and the glass, and the smaller the Pummel value, the smaller the adhesive force between the interlayer film for laminated glass and the glass.
[0044]
[Table 1]
(2) Moisture resistance (whitening resistance) test The laminated glass is left in an environment of 80 ° C. and a relative humidity of 95% for 2 weeks, and immediately after taking out, the whitening distance from the edge of the laminated glass (distance of the whitened portion) ) Was measured.
[0046]
(3) Surface resistance measurement The obtained interlayer film for laminated glass was dried in a desiccator for 24 hours, and the surface resistance was measured with a surface resistance measuring device (DSM-8103, manufactured by Toa Denpa Kogyo Co., Ltd.).
[0047]
Examples 2-3 and Comparative Examples 1-9
With the formulation as shown in Table 2, an interlayer film for laminated glass was produced in the same manner as in Example 1, and the surface resistance was measured. Moreover, using this interlayer film for laminated glass, a laminated glass was produced in the same manner as in Example 1 and evaluated. The results are shown in Table 3.
[0048]
[Table 2]
The description in Table 2 is as follows.
PVB resin: polyvinyl butyral resin Bu degree: butyral degree 3GO: triethylene glycol-di-2-ethylhexanoate 4G7: tetraethylene glycol-di-n-heptanoate C6Mg: magnesium 2-ethylbutyrate C2Mg: magnesium acetate C2K : Potassium acetate Phe: Phenyl group
[Table 3]
From Table 3, since the interlayer film for laminated glass produced in the examples was excellent in adhesion to glass and moisture resistance, a laminated glass excellent in impact resistance and moisture resistance could be produced. Furthermore, since the surface resistance of the film was small, the antistatic property was also excellent. On the other hand, the interlayer film for laminated glass produced in the comparative example was not excellent in both moisture resistance and antistatic property.
[0052]
【The invention's effect】
Since the interlayer film for laminated glass of the present invention has the above-described configuration, the adhesiveness is stable, the moisture resistance is excellent, and the antistatic property is also excellent. Therefore, the interlayer film for laminated glass of the present invention is suitably used as an interlayer film for laminated glass for buildings and vehicles.
Claims (2)
前記可塑化ポリビニルブチラール樹脂は、ポリビニルブチラール樹脂１００重量部に対して、下記一般式（１）で表される化合物を０．０５〜３重量部、下記一般式（２）で表される化合物を０．０５〜３重量部及び炭素数４〜１２のカルボン酸のカリウム塩を０．００５〜０．５重量部添加されてなることを特徴とする合わせガラス用中間膜。
Ｒ1 −Ｏ−（ＣＨ2 ＣＨ2 Ｏ）ｍＨ （１）
式中、Ｒ1 は、炭素数１〜２５の炭化水素基を表し、ｍは、１〜２０の整数を表す。
Ｒ2 −Ｏ−（ＣＨ2 ＣＨ2 ＣＨ2 Ｏ）ｎＨ （２）
式中、Ｒ2 は、炭素数１〜２５の炭化水素基を表し、ｎは、１〜２０の整数を表す。An interlayer film for laminated glass comprising a plasticized polyvinyl butyral resin having a butyralization degree of 62 to 72 mol%,
The plasticized polyvinyl butyral resin is 0.05 to 3 parts by weight of a compound represented by the following general formula (1) and a compound represented by the following general formula (2) with respect to 100 parts by weight of the polyvinyl butyral resin. An interlayer film for laminated glass comprising 0.05 to 3 parts by weight and 0.005 to 0.5 parts by weight of a potassium salt of a carboxylic acid having 4 to 12 carbon atoms.
R 1 -O- (CH 2 CH 2 O) mH (1)
In the formula, R 1 represents a hydrocarbon group having 1 to 25 carbon atoms, and m represents an integer of 1 to 20.
R 2 -O- (CH 2 CH 2 CH 2 O) nH (2)
In the formula, R 2 represents a hydrocarbon group having 1 to 25 carbon atoms, and n represents an integer of 1 to 20.
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| JP2000051665A JP4339485B2 (en) | 2000-02-28 | 2000-02-28 | Laminated glass interlayer film and laminated glass |
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| JP2000051665A JP4339485B2 (en) | 2000-02-28 | 2000-02-28 | Laminated glass interlayer film and laminated glass |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7462664B2 (en) | 2002-07-31 | 2008-12-09 | E. I. Du Pont De Nemours And Company | Polyvinylbutyral interlayer sheet with improved adhesion to glass and a process for preparing same |
| JP3992698B2 (en) * | 2004-07-20 | 2007-10-17 | 電気化学工業株式会社 | Polyvinyl acetal resin composition, sheet and laminated glass |
| JP5208605B2 (en) * | 2008-02-22 | 2013-06-12 | 積水化学工業株式会社 | Laminated glass interlayer film and laminated glass |
| JP5715565B2 (en) * | 2009-08-07 | 2015-05-07 | 株式会社クラレ | Polyvinyl acetal composition, laminate, and use thereof |
| WO2012077794A1 (en) * | 2010-12-09 | 2012-06-14 | 積水化学工業株式会社 | Interlayer for laminated glass, and laminated glass |
| JP6564324B2 (en) * | 2014-03-31 | 2019-08-21 | 積水化学工業株式会社 | Interlayer film for laminated glass and laminated glass |
| JP6392629B2 (en) * | 2014-10-28 | 2018-09-19 | 株式会社クラレ | Polyvinyl acetal composition |
| KR102298252B1 (en) * | 2016-03-28 | 2021-09-07 | 세키스이가가쿠 고교가부시키가이샤 | Thermoplastic resin film and glass plate-containing laminate |
| US20200039189A1 (en) * | 2016-10-12 | 2020-02-06 | Sekisui Chemical Co., Ltd. | Laminated glass intermediate film, rolled body, and laminated glass |
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