Palladium catalyzed addition of amines to 3,4-epoxy-1-butene
    7.
    发明授权
    Palladium catalyzed addition of amines to 3,4-epoxy-1-butene 失效
    钯催化向3,4-环氧-1-丁烯中加入胺

    公开(公告)号:US5288910A

    公开(公告)日:1994-02-22

    申请号:US940983

    申请日:1992-09-04

    申请人: Yann Hung

    发明人: Yann Hung

    摘要: 4-amino-2-buten-1-ol is formed by the regioselective addition of primary amines or ammonia to 3,4-epoxy-1-butene. A quantity of a the primary amine or ammonia is reacted with 3,4-epoxy-1-butene in a reaction medium in the presence of a catalyst. The reaction medium is a liquid which has an E.sub.T (30) no less than about 32. The catalyst is a complex of palladium and phosphine ligands.

    摘要翻译: 4-氨基-2-丁烯-1-醇通过将伯胺或氨区域选择性加成到3,4-环氧-1-丁烯而形成。 在催化剂存在下,一定量的伯胺或氨与3,4-环氧-1-丁烯在反应介质中反应。 反应介质是具有不小于约32的ET(30)的液体。催化剂是钯和膦配体的络合物。

    Electrophotographic element containing barrier layer
    8.
    发明授权
    Electrophotographic element containing barrier layer 失效
    含有阻挡层的电子照相元件

    公开(公告)号:US5128226A

    公开(公告)日:1992-07-07

    申请号:US803743

    申请日:1991-12-04

    申请人: Yann Hung

    发明人: Yann Hung

    IPC分类号: G03G5/14

    CPC分类号: G03G5/142 Y10S430/10

    摘要: A photoconductor element of the type comprising successive layers of a support layer, a barrier layer, a charge generation layer, and an n-type charge transport layer wherein the barrier layer is less than about 1.0 micron in thickness and is comprised of (1) at least one monoethylenically unsaturated aliphatic dicarboxylic acid anhydride containing 4 through 8 carbon atoms per molecule, and (2) at least one vinyl monomer wherein the weight ratio of (1) to (2) is in the range of about 10:1 to 1:10.

    摘要翻译: 一种感光体元件,其类型包括支撑层,势垒层,电荷产生层和n型电荷传输层的连续层,其中阻挡层的厚度小于约1.0微米,并由(1) 每分子含有4至8个碳原子的至少一种单烯属不饱和脂族二羧酸酐,和(2)至少一种乙烯基单体,其中(1)至(2)的重量比在约10:1至1的范围内 :10。

    Substituted cyclopentadiene electron transport compounds
    9.
    发明授权
    Substituted cyclopentadiene electron transport compounds 失效
    取代的环戊二烯电子传递化合物

    公开(公告)号:US5103038A

    公开(公告)日:1992-04-07

    申请号:US438813

    申请日:1989-11-20

    IPC分类号: C07C255/31

    CPC分类号: C07C255/31 C07C2101/10

    摘要: Novel tetrasubstituted dicyanomethylene cyclopentadienes are provided which have utility as electron-transport agents in positively-charged electrophotographic elements. The compounds are characterized by the formula: ##STR1## wherein: R.sub.1 and R.sub.4 are each independently selected from the group consisting of lower alkyl, halogen and cyano;R.sub.2 and R.sub.3 are each independently selected from the group consisting of aryl and substituted aryl; andZ and Z' are each an electron withdrawing group.

    摘要翻译: 提供了新的四取代二氰基亚甲基环戊二烯,其具有作为带正电荷的电子照相元件中的电子传输剂的作用。 化合物的特征在于下式:其中:R 1和R 4各自独立地选自低级烷基,卤素和氰基; R2和R3各自独立地选自芳基和取代的芳基; Z和Z'各自为吸电子基团。

    Low temperature synthesis of alkali metal niobates and tantalates
    10.
    发明授权
    Low temperature synthesis of alkali metal niobates and tantalates 失效
    低温合成碱金属铌酸盐和钽酸盐

    公开(公告)号:US5051280A

    公开(公告)日:1991-09-24

    申请号:US591307

    申请日:1990-10-01

    申请人: Yann Hung

    发明人: Yann Hung

    IPC分类号: C01G33/00 C01G35/00 C23C18/12

    CPC分类号: C23C18/1216

    摘要: A new synthetic method for the production of alkali metal niobates and tantalates is disclosed. The method involves the pyrolysis of a stoichiometric salt of an alkali metal and a niobium or tantalum complex of a bidentate or tridentate ligand. These salts are stable and, since the alkali metal and the niobioum or tantalum are already present in stoichiometric amounts, the resulting material comprises a substantially pure alkali metal niobate or tantalate.