JP5301755B2 - 透明ポリカーボネートブレンドを含有する情報記録媒体 - Google Patents
透明ポリカーボネートブレンドを含有する情報記録媒体 Download PDFInfo
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- JP5301755B2 JP5301755B2 JP2002500617A JP2002500617A JP5301755B2 JP 5301755 B2 JP5301755 B2 JP 5301755B2 JP 2002500617 A JP2002500617 A JP 2002500617A JP 2002500617 A JP2002500617 A JP 2002500617A JP 5301755 B2 JP5301755 B2 JP 5301755B2
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
- G11B7/2595—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on gold
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Description
(A)は次の構造(I)の構造単位を含むポリカーボネートである。
(B)は次の構造(II)の構造単位を含むポリマーである。
(C)は次の構造(III)の構造単位を含むポリマーである。
(A)は次の構造(I)の構造単位を含むポリカーボネートである。
(D)は次の構造(IV)の構造単位を含む脂環式ポリエステル樹脂である。
(A)は次の構造(I)の構造単位を含むポリカーボネートである。
(B)は次の構造(II)の構造単位を含むポリマーである。
(C)は次の構造(III)の構造単位を含むポリマーである。
(A)は次の構造(I)の構造単位を含むポリカーボネートである。
(B)は次の構造(II)の構造単位を含むポリマーである。
(E)は次の構造(V)の構造単位を含むポリマーである。
(B)は次の構造(II)の構造単位を含むポリマーである。
(C)は次の構造(III)の構造単位を含むポリマーである。
(E)は次の構造(V)の構造単位を含むポリマーである。
式中、nr及びnθはディスクの円柱座標軸r及びθに沿った屈折率であり、nrは半径方向に偏光した光ビームで観察される屈折率であり、nθはディスクの平面に対してアジマス方向に偏光した光の屈折率であり、dはディスクの厚さである。IBRはデフォーカスマージンを支配しており、IBRの低減は機械的補正の不可能な諸問題の軽減につながる。IBRは正式には「リターデーション」と呼ばれ、最終光ディスクの特性の一つであり、ナノメートルの単位を有する。
Δn=Cg×Δσg (2)
式中、Δnは複屈折の測定値であり、Δσm及びΔσgはそれぞれ溶融状態及びガラス状態で加えた応力である。応力光学係数Cm及びCgは、材料について、金型充填時の配向と変形及び成形品冷却時の応力による複屈折の起こり易さの尺度である。
式中、nr及びnzはディスクの円柱座標軸r及びzに沿った屈折率であり、nrは半径方向に偏光した光ビームで観察される屈折率であり、nzはディスク平面に垂直に偏光した光に対する屈折率である。VBRはデフォーカスマージンを支配しており、VBRの低減は、機械的補正の不可能な諸問題の軽減につながる。
好ましくは約10000〜約100000g/mol、さらに好ましくは約10000〜約50000g/mol、さらに一段と好ましくは約12000〜約40000g/molである。3種類のポリマーからなる透明混和性ブレンド組成物は、好ましくは約85%以上、さらに好ましくは約90%以上の光透過率を有する。
表1に、本発明の何種類かのブレンドで実験により得たガラス転移温度(Tg)を示す。実施例1〜35のTgは溶剤キャストフィルムで得た。フィルムは以下の通り調製した。各ポリマーについて濃度4重量%の溶液を調製した。溶液同士を混合して適切な混合物とした。例えば、BCCとAMPSの90/10混合物(実施例1)では、9gのBCC溶液を1gのAMPSと混合した。混合溶液を次にガラススライド上に流延し、溶剤を一晩蒸発させた。得られたフィルムを100℃の真空オーブンで3日間乾燥した。乾燥したら、乾燥フィルムの透明度を調べ、Tgを測定した。表1のフィルムはすべて透明で曇りがなく、ブレンドのTg(Tgblend)に関する次の混合式から予測された単一の明確なガラス転移を有していた。
ただし、w1及びw2は重量分率であり、Tg1及びTg2は二成分系ブレンドの個々のポリマーのKelvin単位でのガラス転移温度である。
実施例22〜31は、BCCとAMPSとBisAPのブレンドも3成分混合則に従う明確なTgを有していることを示している。BCC/AMPS/PSブレンドの実施例32及び33並びにBisAP/AMPS/PSブレンドの実施例34及び35は、AMPSも混合物に配合すればポリカーボネートとポリスチレンを混合して透明ブレンドを形成できることを示している。
特定の実施例の透明ポリマーブレンド(表2に示す)を光学製品に成形してTg、Cg、光透過率%及び平衡吸水率を測定した。630nmでの透過率はHP UV−可視光分光光度計を用いて測定した。ブレンドは、約75%以上、さらに好ましくは約80%以上の透過率、及び約60Brewster未満、さらに好ましくは55Brewster未満、さらに一段と好ましくは50Brewster未満のCgを有するべきである。ブレンドは各ポリマー成分のドライ粉末をHenschel強力ミキサーで混合して調製し、光学製品へと成形した。Cg棒状試験片は圧縮成形するか(実施例39及び43)或いは温度250〜320℃で射出成形して「ドッグボーン」形(ゲージ断面厚さ0.125インチ、幅0.500インチ)の棒状引張試験片とした(実施例36〜38及び40〜42)。
表3に示す実施例は、各ポリマー成分のドライ粉末をHenschel強力ミキサーで混合して調製し、穏和なスクリュー設計を備えた28mmWP押出機に供給した。押出はバレル温度約260〜約280℃、スクリュー速度300rpm、押出量約10〜20ポンド/時で行った。得られたペレットを次いでEngel社製275トン射出成形機を用いて、表3に示す通りバレル温度550〜580°F、金型温度171〜208°Fでコンパクトディスクに射出成形した。630nmでの光透過率はすべてのディスクで88%を上回った。さらに、Gardner比色計で黄色度(YI)及びヘイズを測定したところそれぞれ5及び15未満であり、CD基板の許容範囲内であった。これらの実施例の高い透過率と低いヘイズは、これらのポリマーブレンドが混和性であるという結論を支持している。
Claims (29)
- 下記(i)〜(iii)からなる群から選択される混和性ポリマーブレンドであって、100〜185℃のガラス転移温度を有する混和性ポリマーブレンド。
(i)以下の構造(I)の構造単位を含むポリカーボネートである第一のポリマーA、以下の構造(II)の構造単位を含むポリマーである第二のポリマーB、及び光学用途に用いられる任意成分の添加剤、
【化1】
(式中、R1又はR2の少なくとも1つが3又は3′位にあることを条件として、R1及びR2は独立にC1〜C6アルキル基からなり、XはCH2からなり、mは4〜7の整数であり、nは1〜4の整数であり、pは1〜4の整数である。)
【化2】
(式中、R3はC1〜C6アルキル、水素、シアノ又はメトキシである。)
(ii)以下の構造(I)の構造単位を含むポリカーボネートである第一のポリマーA、以下の構造(III)の構造単位を含むポリマーである第二のポリマーC、及び光学用途に用いられる任意成分の添加剤、
【化3】
(式中、R1又はR2の少なくとも1つが3又は3′位にあることを条件として、R1及びR2は独立にC1〜C6アルキル基からなり、XはCH2からなり、mは4〜7の整数であり、nは1〜4の整数であり、pは1〜4の整数である。)
【化4】
(式中、R4、R5及びR6は独立にC1〜C6アルキルからなる。)
(iii)以下の構造(I)の構造単位を含むポリカーボネートである第一のポリマーA、以下の構造(IV)の構造単位を含む脂環式ポリエステル樹脂である第二のポリマーD、及び光学用途に用いられる任意成分の添加剤
【化5】
(式中、R1又はR2の少なくとも1つが3又は3′位にあることを条件として、R1及びR2は独立にC1〜C6アルキル基からなり、XはCH2からなり、mは4〜7の整数であり、nは1〜4の整数であり、pは1〜4の整数である。)
【化6】
(式中、R7又はR8の少なくとも1つが脂環式であることを条件として、R7は炭素原子数6〜20のアリール又はアルカン又はシクロアルカン含有ジオールの残基からなり、R8は炭素原子数6〜20のアリール又は脂肪族又はシクロアルカン含有二酸の脱カルボキシル残基からなる。)
- (A)が構造(I)のカーボネート構造単位であるように選択され、さらに構造(I)のカーボネート構造単位が1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロヘキサン(BCC)、1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロペンタン、1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロヘプタン及びこれらの混合物の残基からなる群から選択される、請求項1記載の混和性ポリマーブレンド。
- (B)が構造(II)のビニルポリマー構造単位であるように選択され、構造(II)のビニルポリマー構造単位がα−メチルポリスチレン(AMPS)の残基から選択される、請求項1記載の混和性ポリマーブレンド。
- (C)が構造(III)のカーボネート構造単位であるように選択され、構造(III)のカーボネート構造単位が1,1−ビス(4−ヒドロキシフェニル)メチルフェニルメタン(BisAP)の残基から選択される、請求項1記載の混和性ポリマーブレンド。
- (D)が構造(IV)のエステル構造単位であるように選択され、構造(IV)のエステル構造単位がポリ(1,4−シクロヘキサン−ジメタノール−1,4−ジカルボキシレート)(PCCD)ともいわれるポリ(シクロヘキサン−1,4−ジメチレンシクロヘキサン−1,4−ジカルボキシレートの残基を含む、請求項1記載の混和性ポリマーブレンド。
- 第一のポリマー(A)が当該ブレンドの60〜99重量%をなし、第二のポリマー(B)が当該ブレンドの1〜40重量%をなす、請求項1記載の混和性ポリマーブレンド。
- 第一のポリマー(A)が当該ブレンドの1〜99重量%をなし、第二のポリマー(C)が当該ブレンドの1〜99重量%をなす、請求項1記載の混和性ポリマーブレンド。
- 第一のポリマー(A)が当該ブレンドの60〜99重量%をなし、第二のポリマー(D)が当該ブレンドの1〜40重量%をなす、請求項1記載の混和性ポリマーブレンド。
- 当該ポリマーブレンドが透明である、請求項1記載の混和性ポリマーブレンド。
- 請求項1記載の混和性ポリマーブレンドを含んでなる製品。
- 製品が光学製品である、請求項10記載の製品。
- 製品が光情報記録媒体である、請求項10記載の製品。
- 光情報記録媒体がデータ層とそれに隣接した透明被覆層とを含んでおり、透明被覆層の厚さが0.6mm以下である、請求項10記載の製品。
- 光情報記録媒体がデータ層とそれに隣接した透明被覆層とを含んでおり、データ層の厚さが1.1mm以下であり、透明被覆層の厚さが100ミクロン以下である、請求項10記載の製品。
- 光学用途に用いる添加剤が当該ブレンドの0.0001〜10重量%である、請求項1記載の混和性ポリマーブレンド。
- 下記(i)〜(ii)からなる群から選択される混和性ポリマーブレンドであって、100〜185℃のガラス転移温度を有する混和性ポリマーブレンド。
(i)以下の構造(I)の構造単位を含むポリカーボネートである第一のポリマーA、以下の構造(II)の構造単位を含むポリマーである第二のポリマーB、以下の構造(III)の構造単位を含むポリマーである第三のポリマーC、及び光学用途に用いられる任意成分の添加剤、
【化7】
(式中、R1又はR2の少なくとも1つが3又は3′位にあることを条件として、R1及びR2は独立にC1〜C6アルキル基からなり、XはCH2からなり、mは4〜7の整数であり、nは1〜4の整数であり、pは1〜4の整数である。)
【化8】
(式中、R3はC1〜C6アルキル、水素、シアノ又はメトキシである。)
【化9】
(式中、R4、R5及びR6は独立にC1〜C6アルキルからなる。)
(ii)以下の構造(I)の構造単位を含むポリカーボネートである第一のポリマーA、以下の構造(II)の構造単位を含むポリマーである第二のポリマーB、以下の構造(V)の構造単位を含むポリマーである第三のポリマーE、及び光学用途に用いられる任意成分の添加剤
【化10】
(式中、R1又はR2の少なくとも1つが3又は3′位にあることを条件として、R1及びR2は独立にC1〜C6アルキル基からなり、XはCH2からなり、mは4〜7の整数であり、nは1〜4の整数であり、pは1〜4の整数である。)
【化11】
(式中、R3はC1〜C6アルキル、水素、シアノ又はメトキシである。)
【化12】
(式中、R9はC1〜C6アルキル、水素、シアノ又はメトキシである。)
- (A)が構造(I)のカーボネート構造単位であるように選択され、さらに構造(I)のカーボネート構造単位が1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロヘキサン(BCC)、1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロペンタン、1,1−ビス(4−ヒドロキシ−3−メチルフェニル)シクロヘプタン及びこれらの混合物の残基からなる群から選択される、請求項16記載の混和性ポリマーブレンド。
- (B)が構造(II)のビニルポリマー構造単位であるように選択され、構造(II)のビニルポリマー構造単位がα−メチルポリスチレン(AMPS)の残基から選択される、請求項16記載の混和性ポリマーブレンド。
- (C)が構造(III)のカーボネート構造単位であるように選択され、構造(III)のカーボネート構造単位が1,1−ビス(4−ヒドロキシフェニル)メチルフェニルメタン(BisAP)の残基から選択される、請求項16記載の混和性ポリマーブレンド。
- (E)が構造(V)のビニルポリマー構造単位であるように選択され、構造(V)のビニルポリマー構造単位がポリスチレン(PS)の残基から選択される、請求項16記載の混和性ポリマーブレンド。
- 第一のポリマー(A)が当該ブレンドの1〜80重量%をなし、第二のポリマー(B)が当該ブレンドの1〜50重量%をなし、第三のポリマー(C)が当該ブレンドの1〜80重量%をなす、請求項16記載の混和性ポリマーブレンド。
- 第一のポリマー(A)が当該ブレンドの50〜98重量%をなし、第二のポリマー(B)が当該ブレンドの1〜30重量%をなし、第三のポリマー(E)が当該ブレンドの1〜20重量%をなす、請求項16記載の混和性ポリマーブレンド。
- ポリマーブレンドが透明である、請求項16記載の混和性ポリマーブレンド。
- 請求項16記載の混和性ポリマーブレンドを含んでなる製品。
- 製品が光学製品である、請求項24記載の製品。
- 製品が光情報記録媒体である、請求項24記載の製品。
- 光情報記録媒体がデータ層とそれに隣接した透明被覆層とを含んでおり、透明被覆層の厚さが0.6mm以下である、請求項24記載の製品。
- 光情報記録媒体がデータ層とそれに隣接した透明被覆層とを含んでおり、データ層の厚さが1.1mm以下であり、透明被覆層の厚さが100ミクロン以下である、請求項24記載の製品。
- 光学用途に用いられる任意成分の添加剤がブレンドの0.0001〜10重量%である、請求項16記載の混和性ポリマーブレンド。
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US7087682B2 (en) | 2003-05-02 | 2006-08-08 | General Electric | Polymeric blends for optical devices and method of manufacture thereof |
DE10338909A1 (de) * | 2003-08-23 | 2005-03-17 | Bayer Materialscience Ag | Aromatische Formale als Additive zur Absenkung der Wasseraufnahme von Polycarbonaten |
US20090030128A1 (en) * | 2007-07-25 | 2009-01-29 | Shreyas Chakravarti | New polyester-polycarbonate compositions |
US8222347B2 (en) | 2007-07-25 | 2012-07-17 | Sabic Innovative Plastics Ip B.V. | Polyester-polycarbonate compositions |
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CA1274936A (en) * | 1986-12-25 | 1990-10-02 | Akihiro Watanabe | Random copolymer containing hexagonal imide units, a process for producing the same, and an optical disc substrate made of the random copolymer |
JPH01123860A (ja) * | 1987-11-09 | 1989-05-16 | Nippon Steel Corp | 熱可塑性樹脂組成物 |
DE3743491A1 (de) | 1987-12-22 | 1989-07-13 | Bayer Ag | Verwendung von mischungen aus polycarbonaten und styrolpolymerisaten als substrate fuer optische speicher |
DE3828761A1 (de) * | 1988-08-25 | 1990-03-08 | Bayer Ag | Verwendung von mischungen aus thermoplastischen polycarbonaten und copolymerisaten von styrolen mit (meth)-acrylsaeureestern als substrate fuer optische datenspeicher |
DE3829890A1 (de) * | 1988-09-02 | 1990-03-15 | Bayer Ag | Polystyrol-polycarbonat-mischungen |
DE3908037A1 (de) * | 1989-03-11 | 1990-09-13 | Bayer Ag | Polycarbonat-mischungen |
CA2171584A1 (en) * | 1995-04-11 | 1996-10-12 | James P. Mason | Compositions having low birefringence |
JPH0953008A (ja) * | 1995-08-11 | 1997-02-25 | Daicel Chem Ind Ltd | 易引裂き性フィルムおよびその製造方法 |
JPH09183892A (ja) * | 1995-12-28 | 1997-07-15 | Nippon G Ii Plast Kk | 透明なポリエステル/ポリカーボネート樹脂組成物を用いた光学成形品及び該成形品を作るための樹脂組成物 |
JP3454080B2 (ja) * | 1997-05-23 | 2003-10-06 | 三菱化学株式会社 | 芳香族ポリカーボネート樹脂組成物およびそれからなる光学製品部材 |
US5907026A (en) * | 1997-08-27 | 1999-05-25 | General Electric Company | Polycarbonate compositions comprising polyester resins and ultraviolet light absorbers |
JPH1184690A (ja) * | 1997-09-05 | 1999-03-26 | Sharp Corp | 電子写真感光体及びその製造方法 |
JPH11181197A (ja) * | 1997-10-13 | 1999-07-06 | Arakawa Chem Ind Co Ltd | ポリカーボネート用流動性改質剤およびポリカーボネート樹脂組成物 |
JP4033558B2 (ja) * | 1998-09-08 | 2008-01-16 | 帝人化成株式会社 | 共重合ポリカーボネート樹脂シート |
US6221556B1 (en) * | 1999-03-05 | 2001-04-24 | General Electric Company | Article for optical data storage device |
US6060577A (en) * | 1999-03-18 | 2000-05-09 | General Electric Company | Polycarbonates derived from alicyclic bisphenols |
US6001953A (en) * | 1999-03-18 | 1999-12-14 | General Electric Company | Polycarbonates suitable for use in optical articles |
JP3738627B2 (ja) * | 1999-09-06 | 2006-01-25 | 富士ゼロックス株式会社 | 電子写真感光体、それを有するプロセスカートリッジ及び電子写真装置 |
WO2001083615A2 (en) * | 2000-05-01 | 2001-11-08 | General Electric Company | Clear polycarbonate blends |
US6441123B1 (en) * | 2000-05-31 | 2002-08-27 | General Electric Company | Vibration damping monolithic polymers |
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2001
- 2001-05-29 KR KR1020077022042A patent/KR100859439B1/ko active IP Right Grant
- 2001-05-29 EP EP01948245A patent/EP1360238B1/en not_active Expired - Lifetime
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- 2001-05-29 WO PCT/US2001/017366 patent/WO2001092419A2/en active Application Filing
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KR20030007813A (ko) | 2003-01-23 |
ATE541008T1 (de) | 2012-01-15 |
KR100859439B1 (ko) | 2008-09-23 |
JP2011219772A (ja) | 2011-11-04 |
WO2001092419A2 (en) | 2001-12-06 |
JP5581274B2 (ja) | 2014-08-27 |
WO2001092419A3 (en) | 2003-06-26 |
JP2004509980A (ja) | 2004-04-02 |
EP1360238B1 (en) | 2012-01-11 |
KR20070106040A (ko) | 2007-10-31 |
EP1360238A2 (en) | 2003-11-12 |
KR100867456B1 (ko) | 2008-11-06 |
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