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    • 3. 发明授权
    • Hydrogenation product of block copolymer or sheet or film of the same
    • 嵌段共聚物或片或其膜的氢化产物
    • US07985484B2
    • 2011-07-26
    • US11887941
    • 2006-04-07
    • Susumu HoshiYukio Yamaura
    • Susumu HoshiYukio Yamaura
    • B32B27/30C08L53/02C08F236/06
    • C08F8/04B29C55/005B29C55/06B29C55/12B29C61/003B29K2009/06B32B27/32C08F297/04C08L25/04C08L53/025Y10T428/31855Y10T428/31909Y10T428/31931C08L2666/24
    • An object of the invention is to provide a block copolymer hydrogenation product suitable for a sheet and a heat shrinkable film which are excellent in solvent resistance, rigidity, elongation and transparency, which is excellent in a balance of physical properties such as solvent resistance, natural shrinkability, low-temperature shrinkability, rigidity, transparency and low-temperature elongation, and a composition thereof. The invention relates to a block copolymer hydrogenation product having a weight ratio of a vinyl aromatic hydrocarbon and a conjugated diene of 55/45 to 95/5, a number average molecular weight measured by gel permeation chromatography (GPC) of 30,000 to 500,000 and a hydrogenation rate of 30% or more, wherein the vinyl aromatic hydrocarbon incorporated into the hydrogenation product has a block rate of 60 to 98% by weight, wherein relative to the weight of the total vinyl aromatic hydrocarbon polymer blocks, the ratio of vinyl aromatic hydrocarbon polymer blocks having a molecular weight of 50,000 or less is 80% by weight or more and the ratio of vinyl aromatic hydrocarbon polymer blocks having a molecular weight of 15,000 or less is from 10 to 80% by weight, and wherein at least one peak temperature of function tan δ in a dynamic viscoelasticity measurement of the hydrogenation product is present within the range of exceeding −80° C. to lower than −10° C.
    • 本发明的目的是提供一种适用于耐溶剂性,刚性,伸长率和透明度优异的片材和热收缩膜的嵌段共聚物氢化产物,其具有优异的物理性能如耐溶剂性,天然的 收缩性,低温收缩性,刚性,透明性和低温伸长率及其组成。 本发明涉及一种乙烯基芳族烃和共轭二烯的重量比为55/45〜95/5的嵌段共聚物加氢产物,通过凝胶渗透色谱法(GPC)测定的数均分子量为30,000〜500,000, 氢化率为30%以上,其中加入到氢化产物中的乙烯基芳族烃具有60至98重量%的嵌段率,其中相对于总乙烯基芳族烃聚合物嵌段的重量,乙烯基芳烃 分子量为50,000以下的聚合物嵌段为80重量%以上,分子量为15000以下的乙烯基芳香族烃聚合物嵌段的比例为10〜80重量%,其中,至少一个峰值温度 在氢化产物的动态粘弹性测量中的函数tanδ存在于超过-80℃至低于-10℃的范围内
    • 4. 发明授权
    • Recording reproducing optical system, objective lens, and aberration correcting optical element
    • 记录再现光学系统,物镜和像差校正光学元件
    • US07327663B2
    • 2008-02-05
    • US10420911
    • 2003-04-23
    • Tohru KimuraNorikazu Arai
    • Tohru KimuraNorikazu Arai
    • G11B7/00
    • G11B7/1376G11B7/1353G11B7/1374G11B7/1378G11B7/13922G11B7/13925G11B2007/0006G11B2007/13727
    • A recording reproducing optical system for an optical information recording medium is provided with a light source; an objective lens; and an aberration correcting optical element provided on an optical path between the light source and the objective lens. The objective lens includes an aspherical surface and one diffractive surface on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed and the objective lens is a plastic lens structured in one element in one group. The aberration correcting optical element comprises at least one plastic lens on which a diffractive structure structured by a plurality of concentric ring-shaped zonal steps is formed. The following formulas are satisfied: PD1>0 (PD1 is a diffractive power (mm−1)), PD2 0 (PR2 is a refractive power (mm−1) as a refractive lens).
    • 一种用于光学信息记录介质的记录再现光学系统设置有光源; 物镜; 以及设置在光源和物镜之间的光路上的像差校正光学元件。 物镜包括非球面和一个衍射表面,其上形成有由多个同心环形区带台阶构成的衍射结构,并且物镜是以一个组件中的一个元件构成的塑料透镜。 像差校正光学元件包括至少一个塑料透镜,在其上形成由多个同心环状带状台阶构成的衍射结构。 满足下列公式:PD 1> 0(PD 1是衍射功率(mm -1)),PD 2 <0(PD 2是衍射功率(mm < / SUP>))和PR 2> 0(PR 2是作为折射透镜的折射光焦度(mm -1))。