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181 条记录 (耗时 0.036 秒)

    Hydrogenated styrene polymer, process for producing the same, and molded object obtained therefrom
    3.
    发明授权
    Hydrogenated styrene polymer, process for producing the same, and molded object obtained therefrom 失效
    氢化苯乙烯聚合物，其制造方法和由其获得的成型体

    公开(公告)号：US06806322B2

    公开(公告)日：2004-10-19

    申请号：US10466278

    申请日：2003-07-15

    申请人： Kiyonari Hashizume ,  Nobuaki Kido ,  Shunichi Matsumura ,  Takeshi Sasaki

    发明人： Kiyonari Hashizume ,  Nobuaki Kido ,  Shunichi Matsumura ,  Takeshi Sasaki

    IPC分类号： C08F804

    CPC分类号： C08F8/04 ,  G11B7/2533 ,  Y10S525/94 ,  C08F12/08 ,  C08F297/04

    摘要： The present invention relates to a hydrogenated styrene polymer that has excellent transparency, can be used suitably for an optical application such as an optical disk substrate, has stability and transparency in a hot and humid environment, and has excellent heat resistance; and a process for producing same; etc. The hydrogenated styrene polymer of the present invention has a hydrogenated polymerized styrene unit content of at least 70 wt %, a content of fine particulate foreign matter having a particle size of 0.2 &mgr;m or more and less than 0.5 &mgr;m of at most 1×106 per g of the hydrogenated styrene polymer, and a phosphorus atom content of at most 0.01 parts by weight in 100 parts by weight of the hydrogenated styrene polymer. Furthermore, the process for producing a hydrogenated styrene polymer of the present invention includes steps of filtering, with a filter having a pore size of 0.3 &mgr;m or less, a hydrogenated styrene polymer having a hydrogenated polymerized styrene unit content of at least 70 wt %, at a temperature at which the solution viscosity thereof is at most 10 Pa·sec (100 poise) at a shear rate of 1 (1/s), and then removing a solvent from the filtrate thus obtained.

    摘要翻译： 本发明涉及具有优异透明性的氢化苯乙烯聚合物，可适用于光盘基板等光学应用，在热湿环境下具有稳定性和透明性，耐热性优异; 及其制造方法。 本发明的氢化苯乙烯聚合物具有至少70重量％的氢化聚合苯乙烯单元含量，粒径为0.2μm以上且小于0.5μm的微粒异物的含量至多为1×10 6， 6g / g氢化苯乙烯聚合物，磷原子含量在100重量份氢化苯乙烯聚合物中至多为0.01重量份。 此外，本发明的氢化苯乙烯聚合物的制造方法包括使用孔径为0.3μm以下的过滤器过滤氢化聚合苯乙烯单元含量为70重量％以上的氢化苯乙烯聚合物， 在1（1 / s）的剪切速度下，溶液粘度为10Pa·sec（100泊）以下的温度下，然后从由此得到的滤液中除去溶剂。

    Method of producing an acylated cellulose film
    6.
    发明授权
    Method of producing an acylated cellulose film 失效
    酰化纤维素膜的制造方法

    公开(公告)号：US5695694A

    公开(公告)日：1997-12-09

    申请号：US468982

    申请日：1995-06-06

    申请人： Kaoru Iwata ,  Masanori Abe ,  Utami Yonemura ,  Takeshi Sasaki

    发明人： Kaoru Iwata ,  Masanori Abe ,  Utami Yonemura ,  Takeshi Sasaki

    IPC分类号： C08J5/18 ,  B29D11/00

    CPC分类号： C08J5/18 ,  C08J2301/10 ,  Y10T428/1036 ,  Y10T428/1086

    摘要： An acylated cellulose film having a high optical isotropy and uniformity is produced by dissolving an acylated cellulose in a solvent substantially free from water and including, as a principal component, 1,3-dioxolane in a ratio in weight of the acylated cellulose to the solvent of 10/250 to 10/15; spreading the acylated cellulose solution on a film-forming surface of a support; and drying, for example, initially drying the spread solution layer on film-forming surface so as to reduce the content of the residual solvent in the resultant film to 5 to 30% by weight; removing the resultant residual solvent-containing film from the film-forming surface; and finally drying the removed film, while allowing the film to shrink in the transversal direction thereof, at a drying temperature controlled continuously or intermittently to a level satisfying the relationship (I): (Tg'-50.degree. C.).ltoreq.T.ltoreq.(Tg'+20.degree. C.) (I), wherein T is the drying temperature (.degree.C.) and Tg' is a glass transition temperature (.degree.C.) of the solvent-containing film, the temperature Tg' varying in response to the solvent content in the film.

    摘要翻译： 通过将酰化纤维素溶解在基本上不含水的溶剂中，以酰化纤维素与溶剂的重量比为主要成分的1,3-二氧戊环作为主要成分，制得具有高光学各向同性和均匀性的酰化纤维素膜 10/50〜10/15; 将酰化纤维素溶液铺展在载体的成膜表面上; 并干燥，例如，最初在成膜表面上干燥铺展的溶液层，以便将所得膜中残留溶剂的含量降低至5至30重量％; 从所述成膜表面除去所得残留的含溶剂的膜; 最后在连续或间歇地控制的干燥温度下使薄膜在其横向上收缩，同时使除去的膜干燥至满足关系式（I）：（Tg'-50℃）T = （℃）（I）其中T是干燥温度（℃），Tg'是含溶剂膜的玻璃化转变温度（℃），温度Tg “响应于膜中的溶剂含量而变化。