Process for the preparation of polybutylene terephthalate
    2.
    发明授权
    Process for the preparation of polybutylene terephthalate 失效
    制备聚对苯二甲酸丁二醇酯的方法

    公开(公告)号:US4346213A

    公开(公告)日:1982-08-24

    申请号:US181275

    申请日:1980-08-25

    CPC分类号: C08G63/85 C08G63/78

    摘要: In the two stage reaction of terephthalic acid with 1,4-butanediol to produce polybutylene terephthalate in which acid and diol are first subjected to catalytic esterification/oligomerization and the resulting products are thereafter subjected to catalytic polycondensation, the co-production of tetrahydrofuran is significantly reduced by conducting the polycondensation reaction prior to completion of the esterification/oligomerization reaction.

    摘要翻译: 在对苯二甲酸与1,4-丁二醇的两阶段反应中,生成聚对苯二甲酸丁二醇酯,其中酸和二醇首先进行催化酯化/低聚,然后使所得产物进行催化缩聚,四氢呋喃的共同生产显着 通过在酯化/低聚反应完成之前进行缩聚反应来还原。

    Azo-dye-doped photorefractive polymer composites for holographic testing
and image processing
    3.
    发明授权
    Azo-dye-doped photorefractive polymer composites for holographic testing and image processing 失效
    用于全息测试和图像处理的偶氮染料掺杂光折变聚合物复合材料

    公开(公告)号:US5744267A

    公开(公告)日:1998-04-28

    申请号:US710084

    申请日:1996-09-10

    IPC分类号: G03H1/02 G03H1/04 G03C1/72

    摘要: A photorefractive (PR) device comprises of a layer of a novel photorefractive polymer composite sandwiched inbetween two transparent electrodes. The PR polymer composite comprises a photoconducting polymer, a photosensitizer, a novel second-order, non-linear optical chromophore, and a plasticizer in an amount sufficient to provide the PR polymer composite with a glass transition temperature below about 45.degree. C. The PR polymer composite is capable of internally storing image patterns generated by interfering two coherent light beams inside the material. The PR polymer composite shows high diffraction efficiencies (near 100%) and high net two-coupling gain (>200 cm.sup.-1). The writing of information is reversible. Consequently, the device is suitable for read/write holographic storage and real-time image processing applications, and is capable of being poled at essentially room temperature. The light source is an integrated semiconductor laser and the detector is a commercial Si photodiode or a CCD camera.

    摘要翻译: 光折射(PR)装置包括夹在两个透明电极之间的一层新的光折变聚合物复合材料。 PR聚合物复合材料包括光导体聚合物,光敏剂,新颖的二阶非线性光学发色团和足以提供玻璃化转变温度低于约45℃的PR聚合物复合材料的增塑剂.PR 聚合物复合材料能够内部存储通过在材料内部干涉两个相干光束而产生的图像图案。 PR聚合物复合材料显示出高衍射效率(接近100%)和高净双耦合增益(> 200cm-1)。 撰写信息是可逆的。 因此,该装置适用于读/写全息存储和实时图像处理应用,并且能够在基本上室温下极化。 光源是集成半导体激光器,检测器是商业Si光电二极管或CCD相机。

    Alkyl vinylidene cyanide polymers exhibiting nonlinear optical and
piezoelectric properties
    4.
    发明授权
    Alkyl vinylidene cyanide polymers exhibiting nonlinear optical and piezoelectric properties 失效
    显示非线性光学和压电性能的亚烷基亚乙烯基氰化物聚合物

    公开(公告)号:US5210165A

    公开(公告)日:1993-05-11

    申请号:US718885

    申请日:1991-06-21

    IPC分类号: C08F222/34 G02F1/361

    CPC分类号: C08F222/34 G02F1/3616

    摘要: This invention provides novel polymers containing alkyl vinylidene cyanide moieties that exhibit nonlinear optical and piezoelectric properties. The polymers have utility as media in optical devices.An invention polymer is illustrated by the copolymer of the following structure: ##STR1##

    摘要翻译: 本发明提供了含有显示非线性光学和压电性质的烷基亚乙烯基氰化物部分的新型聚合物。 聚合物在光学器件中具有作为介质的功能。 发明聚合物由以下结构的共聚物说明:

    High molecular weight polybenzimidazoles
    5.
    发明授权
    High molecular weight polybenzimidazoles 失效
    高分子量聚苯并咪唑

    公开(公告)号:US4483977A

    公开(公告)日:1984-11-20

    申请号:US506544

    申请日:1983-06-21

    IPC分类号: C08G73/18

    CPC分类号: C08G73/18

    摘要: This invention provides an improved type of high molecular weight polybenzimidazole, which involves the use of a phosphorus-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.

    摘要翻译: 本发明提供了一种改进型的高分子量聚苯并咪唑,其涉及使用含磷聚合催化剂。 该方法提供改进的颜色和堵塞值的聚-2,2' - (间亚苯基)-5,5'-联苯并咪唑,其特征还在于特性粘度为至少约0.7dl / g,重均分子量 分子量至少约100,000。

    High molecular weight polybenzimidazole preparation with phosphorus
containing polymerization catalyst
    7.
    发明授权
    High molecular weight polybenzimidazole preparation with phosphorus containing polymerization catalyst 失效
    含磷聚合催化剂的高分子量聚苯并咪唑制剂

    公开(公告)号:US4414383A

    公开(公告)日:1983-11-08

    申请号:US381285

    申请日:1982-05-24

    IPC分类号: C08G73/00 C08G73/18

    CPC分类号: C08G73/18

    摘要: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a phosphorus-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.

    摘要翻译: 本发明提供了一种用于生产改进型高分子量聚苯并咪唑的单阶段熔融聚合方法,该方法涉及使用含磷聚合催化剂。 该方法提供改进的颜色和堵塞值的聚-2,2' - (间亚苯基)-5,5'-联苯并咪唑,其特征还在于特性粘度为至少约0.7dl / g,重均分子量 分子量至少约100,000。

    High molecular weight polybenzimidazole preparation with phosphorus
containing catalyst
    8.
    发明授权
    High molecular weight polybenzimidazole preparation with phosphorus containing catalyst 失效
    含磷催化剂的高分子量聚苯并咪唑制剂

    公开(公告)号:US4452967A

    公开(公告)日:1984-06-05

    申请号:US506543

    申请日:1983-06-21

    IPC分类号: C08G73/18

    CPC分类号: C08G73/18

    摘要: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of a phosphorus-containing polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and plugging value, and is further characterized by an inherent viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.

    摘要翻译: 本发明提供了一种用于生产改进型高分子量聚苯并咪唑的单阶段熔融聚合方法,该方法涉及使用含磷聚合催化剂。 该方法提供改进的颜色和堵塞值的聚-2,2' - (间亚苯基)-5,5'-联苯并咪唑,其特征还在于特性粘度为至少约0.7dl / g,重均分子量 分子量至少约100,000。

    Process for the preparation of polybutylene terephthalate
    9.
    发明授权
    Process for the preparation of polybutylene terephthalate 失效
    制备聚对苯二甲酸丁二醇酯的方法

    公开(公告)号:US4439597A

    公开(公告)日:1984-03-27

    申请号:US369065

    申请日:1982-04-16

    IPC分类号: C08G63/78 C08G63/85 C08G63/34

    CPC分类号: C08G63/85 C08G63/78

    摘要: In the two stage reaction of terephthalic acid with 1,4-butanediol to produce polybutylene terephthalate in which acid and diol are first subjected to catalytic esterification/oligomerization and the resulting products are thereafter subjected to catalytic polycondensation, the co-production of tetrahydrofuran is significantly reduced by conducting the polycondensation reaction prior to completion of the esterification/oligomerization reaction.

    摘要翻译: 在对苯二甲酸与1,4-丁二醇的两阶段反应中,生成聚对苯二甲酸丁二醇酯,其中酸和二醇首先进行催化酯化/低聚,然后使所得产物进行催化缩聚,四氢呋喃的共同生产显着 通过在酯化/低聚反应完成之前进行缩聚反应来还原。