JPS6335619A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS6335619A JPS6335619A JP61177560A JP17756086A JPS6335619A JP S6335619 A JPS6335619 A JP S6335619A JP 61177560 A JP61177560 A JP 61177560A JP 17756086 A JP17756086 A JP 17756086A JP S6335619 A JPS6335619 A JP S6335619A
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate resin
- disk
- optical
- base material
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 23
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 14
- 125000003003 spiro group Chemical group 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 abstract description 5
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 4
- 229930195729 fatty acid Natural products 0.000 abstract description 4
- 239000000194 fatty acid Substances 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 150000004665 fatty acids Chemical class 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002216 antistatic agent Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- -1 fatty acid esters Chemical class 0.000 description 3
- 239000000113 methacrylic resin Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 239000004923 Acrylic lacquer Substances 0.000 description 1
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Polyesters Or Polycarbonates (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、元ディスクに関し、待に、ディスク基材とし
て、スピロ環骨格を有するポリカーボネート樹脂を使用
し、透明性、耐熱性、耐湿性および機械的強度に優れる
とともに、光学的性質においても、レタデーシ曹ン（複
屈折匝）が小さく、光学的均質性に優れた元ディスクに
関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an original disk, and firstly, it uses a polycarbonate resin having a spiro ring skeleton as a disk base material, and has excellent transparency, heat resistance, moisture resistance, and The present invention relates to an original disk that has excellent mechanical strength, low retardation (birefringence), and excellent optical homogeneity in terms of optical properties.
レーザ光線のスポットビームをディスク上にあて、ディ
スク上の微細なビットにより記録されている信号を反射
または透過光量を検出することによって読み出す光学式
情報記録および再生方式は著しく記録密度を上げること
ができ、また、これより再生される画像や音質は優れた
特性を有する。Optical information recording and reproducing methods, in which a spot beam of laser light is directed onto a disk and signals recorded by minute bits on the disk are read out by detecting the amount of reflected or transmitted light, can significantly increase recording density. Moreover, the images and sound quality reproduced from this have excellent characteristics.
このため、画像や音声の記録再生あるいは多量の情報の
記憶再生等に広く実用されることが期待されている。こ
の記録再生方式に利用されるディスクには、ディスク基
材をレーザー光が透過するために、透明であることは勿
論、光学的均質性を有することが強く求められる。Therefore, it is expected that it will be widely used for recording and reproducing images and sounds, storing and reproducing large amounts of information, etc. Disks used in this recording/reproducing system are strongly required to not only be transparent but also to have optical homogeneity since laser light passes through the disk base material.
従来、この種のディスク基材用材料としては、ポリメチ
ルメタクリレート（ＰＭＭＡ ）樹脂等が知られている
。このメタクリル樹脂（ＰＭＭＡ ）は、主として画像
用光デイスク基材として、２枚張り・合わせの両面記録
盤の形で使用されている。一方・最近、特にコンパクト
ディスク用の片面仕様に適したものとして、一般には、
ビスフェノールＡ（２，２−ビス（４′−ヒドロ中ジフ
ェニル）グロバン）？ホスゲンや炭酸ジフェニル等と反
応させて得られるパリカーボネート樹脂が使用されるよ
うになっている。Conventionally, polymethyl methacrylate (PMMA) resin and the like have been known as materials for this type of disk base material. This methacrylic resin (PMMA) is mainly used as a base material for image-forming optical discs in the form of double-sided recording discs made of two laminated sheets. On the other hand, recently, in general, as one suitable for single-sided specifications for compact discs,
Bisphenol A (2,2-bis(4'-diphenyl in hydro)globan)? Paricarbonate resin obtained by reacting with phosgene, diphenyl carbonate, etc. has come into use.
ところが、上記したメタクリル樹脂は、熱変形温度が６
８〜８８°０と低く、耐熱性に劣り、耐衝撃性の点にお
いても不十分なところがある。また、このメタクリル樹
脂は、特に、耐湿性に難点があり、コンパクトディスク
等の片面仕様の場合には吸湿による膨潤が起こり、反り
を生じる問題がある。このため、片面仕様のものには使
用することができない。However, the heat distortion temperature of the above-mentioned methacrylic resin is 6.
It has a low heat resistance of 8 to 88°0, and has poor impact resistance. Moreover, this methacrylic resin has a particularly poor moisture resistance, and in the case of single-sided specifications such as compact discs, swelling due to moisture absorption occurs, causing a problem of warping. Therefore, it cannot be used for single-sided specifications.
−Ｊ、ｆｉ在コンパクトディスク用＆＆として実用化さ
れているポリカーボネ”ト樹脂は、耐熱性耐湿性、耐衝
撃性などにおいて優れているもののレタデーＶｌン（複
屈折ｆＫ ）が大きく、光学的均質性に劣る。このため
、ディスクに記録された情報の玩み取り感度が低下した
９、エラーが発生するという、光デイスク用基板として
は致命的な欠点がある（日経エレクトロニクス、第２９
２号。- Polycarbonate resins that have been put into practical use for compact discs (J, FI) have excellent heat resistance, moisture resistance, impact resistance, etc., but have a large retardation Vl (birefringence fK) and optical homogeneity. As a result, the sensitivity for reading the information recorded on the disc is reduced9 and errors occur, which are fatal flaws for optical disc substrates (Nikkei Electronics, 29th issue).
No. 2.
１９８２年６月７日号）。(June 7, 1982 issue).
本発明は、上記したポリカーボネートの、光デイスク用
基材としての優れ九特性を備えながら、レメデーンｌン
が小さく光学的均質性にも優れ、ディスクに記録された
情報の読み取り感度の高い元ディスクを提供することを
目的とするものである。The present invention provides a source disc that has the excellent properties of polycarbonate as a base material for optical discs as described above, has a small particle size and is excellent in optical homogeneity, and has high sensitivity for reading information recorded on the disc. The purpose is to provide
上記問題点を′４決し、上記目的を達成するために、本
発明は、スピロ鷹骨格を有し、融点が１？３０〜５６Ｇ
’Ｏの範囲にあるポリカーボネート樹脂を基′材として
使用することを特徴とするものである。In order to solve the above problems and achieve the above objects, the present invention has a spirohawk skeleton and a melting point of 1~30~56G.
It is characterized by using a polycarbonate resin in the range of 'O' as the base material.
本発明に使用するスピロ磯骨格を有するポリカーボネー
トの好適な例としては、
式
で懺わされる繰シ返し単位からなるものを挙げることが
できる。Preferred examples of the polycarbonate having a spiroiso skeleton used in the present invention include those consisting of repeating units represented by the following formula.
このスビｃ２虜骨格の導入方法としては、たとえば、ア
メリカ合衆国特許第２，９４５，００８号明細省に開示
される方法を採用することができる。As a method for introducing this Subi C2 captive skeleton, for example, the method disclosed in US Pat. No. 2,945,008 can be adopted.
本発明に用いるポリカーボネート樹脂の融点範囲を１８
０−５５０℃とした理由は、融点が１８０°０に満たな
い場合には、光ディスクが熱によって反りねじれ等の変
化を受は易く、また、３３０℃を超えると成型が著しく
困難となるからである。The melting point range of the polycarbonate resin used in the present invention is 18
The reason for setting it at 0-550°C is that if the melting point is less than 180°0, the optical disc is susceptible to changes such as warping and twisting due to heat, and if it exceeds 330°C, molding becomes extremely difficult. be.
本発明の基材の成分としては、スタンバ−とのｍｍ性を
改良するために、例えば、シリコーン、ワックス、脂肪
酸、脂肪酸エステル、脂肪酸金属塩、脂肪族アルコール
等の助剤を、帯電防止の目的で５例えば、高級アルコー
ルのスルホン酸塩、第４級アンモニウム塩等の助剤を、
本発明の目的の達成を阻害しない範囲で、上記のポルカ
ーボネート樹脂にさらに加えることもできる。The components of the base material of the present invention include, for example, auxiliary agents such as silicone, wax, fatty acids, fatty acid esters, fatty acid metal salts, and aliphatic alcohols for the purpose of preventing static electricity. 5 For example, auxiliary agents such as higher alcohol sulfonates and quaternary ammonium salts,
It may be further added to the above-mentioned polcarbonate resin as long as it does not impede the achievement of the object of the present invention.
本発明の光ディスクは、上記ポリカーボネート樹脂を射
出成型またはブレス成型等の方法によってスタンパ−を
セットした金型にて記録信号となるビットを転写してデ
ィスク基材を成形し、さらに複製ディスクの場合には一
般的には、ビット転写面に金属の真空蒸着、スパッタリ
ングまたはイオングレーティングなどの方法によって反
射層を珍成し、さらに必要に応じて反射層の保護コーテ
ィングを行なって製造することができる。また、メモリ
ーディスクの場合には、上記と同様にしてトラッキング
信号となるビットを転写した後、さらにビット面に、例
えば、非晶質レアーメタルやレーザーによって熱的に分
解し得る化合物等のユーザーでの書き込み可能な記録層
をスパッタリング真空蒸着または塗布等により形成し、
さらに必要に応じて上記のような反射層や保護コーティ
ングの形成を行なって製造することができる。The optical disc of the present invention is produced by molding the above-mentioned polycarbonate resin by injection molding or breath molding, etc., using a mold in which a stamper is set, to transfer the bits that become the recording signal, and further, in the case of a duplicate disc, to form a disc base material. Generally, a reflective layer is formed on the bit transfer surface by a method such as vacuum evaporation of a metal, sputtering, or ion grating, and if necessary, a protective coating is applied to the reflective layer. In the case of a memory disk, after the bits that become the tracking signal are transferred in the same manner as above, the user may also add materials such as amorphous rare metals or compounds that can be thermally decomposed by laser to the bit surface. A writable recording layer is formed by sputtering, vacuum deposition, coating, etc.
Further, if necessary, a reflective layer or a protective coating as described above can be formed in the manufacturing process.
本発明では、透明性、耐熱性、耐湿性および機械的強度
に優れるとともに、レタデーシ箇ンが小さく、光学的均
質性においても優れ九、スピロ壜骨格を有するポリカー
ボネート樹脂を基材として使用しているので、熱または
吸湿による反りやねじれを生じることがなく、片面仕様
とすることができるとともに、ディスクに記録された情
報を高感度で読み取りすることができ、コンビエータの
メモリーディスク用のように高密度記録のものに対して
も工種な検出が可能となる。In the present invention, a polycarbonate resin having a spirobottle skeleton is used as a base material, which has excellent transparency, heat resistance, moisture resistance, and mechanical strength, has small retardation spots, and has excellent optical homogeneity. Therefore, it does not warp or twist due to heat or moisture absorption, and can be made into a single-sided specification.In addition, the information recorded on the disc can be read with high sensitivity, and the information recorded on the disc can be read with high sensitivity. It is also possible to perform detailed detection even on records.
つぎに、本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例に用いた試料はつぎのとおりである。The samples used in the examples are as follows.
（Ａ）上記式（１）の繰り返し単位を有し、融点が２４
０”Ｃであるポリカーボネート樹脂
ｆＢ）上記式（１）の繰り返し単位を有し、融点が２８
０℃であるポリカーボネート樹脂
（Ｃ）上記式（１）の繰り返し単位を、ゴし、融点が３
５０゛０であるポリカーボネート樹脂
また、比較例試料＋Ｘ）としてはつぎのものを使用した
。(A) has a repeating unit of the above formula (1) and has a melting point of 24
Polycarbonate resin fB) having a repeating unit of the above formula (1) and a melting point of 28
Polycarbonate resin (C) having a melting point of 3.
The following polycarbonate resin was used as a comparative example sample +X).
式
で表わされる繰り返し単位からなる市販のポリカーボネ
ート樹脂
元ディスクの製造は以下のようにして行なった。A commercially available polycarbonate resin base disk consisting of the repeating unit represented by the formula was manufactured as follows.
上記ポリカーボネート樹脂のペレットヲ用いて。Using the polycarbonate resin pellets mentioned above.
スタンバ−を装層した戴盤中に射出成型し、厚さ１．２
關、直径１２０ｎのディスクを得た。Injection molded into a plate coated with stambar, thickness 1.2
A disk with a diameter of 120 nm was obtained.
つぎに信号ビットの刻まれた面にスパッタリング法によ
って７ルミニクムの反射層を形成し、さらに反射層に保
護コートとしてアクリルラッカーを止血して乾燥し、光
ディスクを製造した。Next, a reflective layer of 7 luminicum was formed on the surface on which the signal bits were engraved by sputtering, and an acrylic lacquer was applied as a protective coat to the reflective layer to stop bleeding, and then dried to produce an optical disc.
特性は以下に示す方法で測定した。The characteristics were measured by the method shown below.
（１）耐熱性：１２０°Ｃ１４時間 光ディスクを放置
して、反シ、ねじれの有無を判定した。(1) Heat resistance: 120° C. for 14 hours The optical disc was left to stand, and the presence or absence of warping and twisting was determined.
ただし、融点は融点測定器を用いて求めた。However, the melting point was determined using a melting point measuring device.
（２）光学的均質性二上記ディスクのレタデーシ日ン全
、エリグツメーク（＃尻光学工業所社製）を用い、波長
６５２．８ｎｍのｍｅ−４Ｊｅレーザーを光源としてデ
ィスクの内側から外側まで１０箇所ＶＣｉって求め、最
も大きい−を最大レクデーン掬ンとした。手込い１直の
ものほど元学的均／Ｘ性が優れている０
′：Ａ施例と比較例をまとめて第１表に示す。第１表か
ら、本発明のポリカーボネート樹脂ｔＡ） ＋ ｔＢ）
。(2) Optical homogeneity 2. The retardation of the above disc was performed using Eligtsu Make (manufactured by Shiri Kogaku Kogyo Co., Ltd.), and VCi was applied at 10 locations from the inside to the outside of the disc using a me-4Je laser with a wavelength of 652.8 nm as a light source. , and the largest - was taken as the maximum recdane scoop. Table 1 shows a summary of 0':A examples and comparative examples, in which the more elaborate and one-shift the better the elemental uniformity/X properties. From Table 1, the polycarbonate resin of the present invention tA) + tB)
.
（Ｃ１は比４２例の市販ポリカーボネート樹脂（Ｘ）に
比べて融点が高く、元ディスクとしての耐熱性も同等以
上であることがわかる。また特に、本発明の光ディスク
は、最大レタデー７胃ンが小さく、光学的均質性に著し
く潰れていることが明らかである。(It can be seen that C1 has a higher melting point than the commercially available polycarbonate resin (X) of Example 42, and its heat resistance as an original disk is also higher than that of the commercially available polycarbonate resin (X). In particular, the optical disk of the present invention has a maximum retardation of It is clear that the optical homogeneity is small and the optical homogeneity is significantly degraded.
ナなわら、本発明のポリカーホイート樹脂を用いて成型
した光ディスクは、従来のポリカーボネート樹脂で成型
したものと比べ、特に、光学的均質性に愛れ、耐熱性の
みでなく、他の要求特性も充分満足する実用価値の高い
ものであった。However, compared to those molded using conventional polycarbonate resin, optical discs molded using the polycarbonate resin of the present invention are particularly attractive in terms of optical homogeneity, heat resistance, and other required properties. It was also highly satisfactory and of high practical value.
以下余白。Margin below.
上記したように、スビｃＩｆ１１骨格を有するポリカー
ボネート樹脂を基肯として使用する本発明の光ディスク
は、従来のポリカーボネート樹脂を用イた元ディスクに
比べて、レタデーシ■ンが十分小さく、光学的均質性に
優れ、ディスクに記録され九情報の読み取り感度が高゛
いものである。このように、従来のポリカーボネート樹
脂を用いた光ディスクの致命的欠点であつ九光学的均質
性の問題を解決することができる。さらに、本発明に係
るポリカーボネート樹脂は、耐湿性および耐熱性におい
ても優れているために、従来のメタクリル樹脂とは異な
って、吸湿および高温による反りやね・じれを生じるこ
とがなく１片市仕様にしても十分・実用化され得るもの
である。As mentioned above, the optical disc of the present invention, which uses a polycarbonate resin having a subcIf11 skeleton, has a sufficiently small retardation pattern and a good optical homogeneity compared to the original disc using a conventional polycarbonate resin. It has a high sensitivity for reading the information recorded on the disc. In this way, the problem of optical homogeneity, which is a fatal drawback of conventional optical discs using polycarbonate resin, can be solved. Furthermore, the polycarbonate resin according to the present invention has excellent moisture resistance and heat resistance, so unlike conventional methacrylic resins, it does not warp or twist due to moisture absorption or high temperatures, and can be used in one-piece commercial specifications. However, it is sufficient and can be put into practical use.
Claims (1)
囲にあるポリカーボネート樹脂を基材とすることを特徴
とする光ディスク。1. An optical disc characterized by having a polycarbonate resin having a spiro ring skeleton and having a melting point in the range of 180 to 330°C as a base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177560A JPS6335619A (en) | 1986-07-30 | 1986-07-30 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177560A JPS6335619A (en) | 1986-07-30 | 1986-07-30 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6335619A true JPS6335619A (en) | 1988-02-16 |
Family
ID=16033096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61177560A Pending JPS6335619A (en) | 1986-07-30 | 1986-07-30 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6335619A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787756A3 (en) * | 1996-01-30 | 1998-01-07 | Teijin Limited | Polycarbonate copolymer containing oxaspiroundecane group and production process therefor |
| EP0837086A2 (en) * | 1996-10-18 | 1998-04-22 | Mitsubishi Gas Chemical Company, Inc. | Copolycarbonate resin and resin composition comprising the same |
| JP2003327682A (en) * | 2002-05-15 | 2003-11-19 | Mitsubishi Gas Chem Co Inc | Polycarbonate resin |
| WO2008156186A1 (en) * | 2007-06-19 | 2008-12-24 | Teijin Chemicals Ltd. | Optical film |
| CN109096478A (en) * | 2018-07-17 | 2018-12-28 | 中国科学院成都有机化学有限公司 | A kind of Aliphatic Polycarbonate Copolymers and preparation method thereof |
-
1986
- 1986-07-30 JP JP61177560A patent/JPS6335619A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0787756A3 (en) * | 1996-01-30 | 1998-01-07 | Teijin Limited | Polycarbonate copolymer containing oxaspiroundecane group and production process therefor |
| US5858499A (en) * | 1996-01-30 | 1999-01-12 | Teijin Limited | Polycarbonate copolymer containing oxaspiroundecane group and production process therefor |
| EP0837086A2 (en) * | 1996-10-18 | 1998-04-22 | Mitsubishi Gas Chemical Company, Inc. | Copolycarbonate resin and resin composition comprising the same |
| EP0837086A3 (en) * | 1996-10-18 | 1998-06-17 | Mitsubishi Gas Chemical Company, Inc. | Copolycarbonate resin and resin composition comprising the same |
| US5910562A (en) * | 1996-10-18 | 1999-06-08 | Mitsubishi Gas Chemical Company, Inc. | Copolycarbonate resin and resin composition comprising the same |
| JP2003327682A (en) * | 2002-05-15 | 2003-11-19 | Mitsubishi Gas Chem Co Inc | Polycarbonate resin |
| WO2008156186A1 (en) * | 2007-06-19 | 2008-12-24 | Teijin Chemicals Ltd. | Optical film |
| US8877304B2 (en) | 2007-06-19 | 2014-11-04 | Teijin Chemicals, Ltd. | Optical film |
| CN109096478A (en) * | 2018-07-17 | 2018-12-28 | 中国科学院成都有机化学有限公司 | A kind of Aliphatic Polycarbonate Copolymers and preparation method thereof |
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