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    • 57. 发明授权
    • Low-temperature cure polyvinylbutyral as a photoconducter binder
    • 低温固化聚乙烯醇缩丁醛作为光导体粘合剂
    • US06465142B1
    • 2002-10-15
    • US08974926
    • 1997-11-20
    • Khe C. NguyenSivapackia Ganapathiappan
    • Khe C. NguyenSivapackia Ganapathiappan
    • G03G1502
    • C08F8/04C08F8/12C08F16/06
    • Poly(vinyl butyral) compounds of Formula 1 where R1 is alkyl, dialkyl ether, alkyl carbonyl, cycloalkyl, cycloalkyl alkyl, aryl, aryl carbonyl, alkaryl carbonyl, aralkyl, or alkyl aralkyl; Z is —OH or —NHR2, where R2 is independently alkyl, dialkyl ether, alkyl carbonyl, cycloalkyl, cycloalkyl alkyl, aryl, aryl carbonyl, alkaryl carbonyl, aralkyl, alkyl, aralkyl or R2 is H. x is 60 to 95 mol %, y is 3 to 40 mol %, z is 0 to 20 mol %; and x+y+z is 100 mol %, a process for preparing compounds of Formula I, an intermediate in the synthesis of compounds of Formula I, and a photoconductor for electrophotography containing a compound of Formula I as a binder in the charge generation layer are described. These compounds can be crosslinked in the absence of strong acidic and basic catalyst at relatively low temperatures compared with conventional polyvinyl butyral, show good adhesion to a wide variety of surfaces, and exhibit high photoresponses when used in charge generation layers of photoconductors.
    • 式1的聚(乙烯醇缩丁醛)化合物,其中R 1是烷基,二烷基醚,烷基羰基,环烷基,环烷基烷基,芳基,芳基羰基,烷芳基羰基,芳烷基或烷基芳烷基; Z是-OH或-NHR 2, 二烷基醚,烷基羰基,环烷基,环烷基烷基,芳基,芳基羰基,烷芳基羰基,芳烷基,烷基,芳烷基或R2为Hx为60〜95摩尔%,y为3〜40摩尔%,z为0〜20摩尔 %; andx + y + z为100摩尔%,制备式I化合物的方法,式I化合物的合成中间体和电荷产生层中含有式I化合物作为粘合剂的电子照相用光电导体 描述。 与常规聚乙烯醇缩丁醛相比,这些化合物在相对较低的温度下,在不存在强酸性和碱性催化剂的情况下可以交联,对各种表面表现出良好的粘附性,并且当用于光电导体的电荷产生层时,这些化合物表现出高光响应。
    • 58. 发明授权
    • Ink-jet printing ink compositions having magnetic properties and specific core/shell binder
    • 具有磁性的喷墨印刷油墨组合物和特定的核/壳粘合剂
    • US06248805B1
    • 2001-06-19
    • US09183393
    • 1998-10-29
    • Khe C. NguyenSivapackia Ganapathiappan
    • Khe C. NguyenSivapackia Ganapathiappan
    • C01G4902
    • C09B67/0008C08F220/18C08F246/00C08F265/04C08F291/00C09D11/30C08F2/22
    • Specific core-shell binders and magnetic additives for use in ink-jet printing ink compositions are provided. One class of specific core/shell binders has the general formula [AmBnC′p]x, where A and B are hydrophobic components in which A exhibits a glass transition temperature Tg between about −150° and +25° C. and B exhibits a glass transition temperature greater than 25° C., C′ is a component that forms hydrophilic or water-soluble component in the polymer chain, and has an ionic or non-ionic structure, m 40 wt %, and p
    • 提供了用于喷墨印刷油墨组合物的特定核 - 壳粘合剂和磁性添加剂。 一类特定的核/壳粘合剂具有通式[AmBnC'p] x,其中A和B是疏水性组分,其中A表现出约-150°至+ 25℃之间的玻璃化转变温度Tg,并且B表现出 玻璃化转变温度大于25℃,C'是在聚合物链中形成亲水或水溶性组分的组分,具有离子或非离子结构,m <30wt%,n> 40wt% 和p <30wt%,m + n + p = 100wt%,x = 1〜100,000。 聚合物的分子量(重均分子量)在约1,000和2,000,000之间。 可用于实施本发明的聚合物通过乳化单体然后在水中进行自由基聚合来制备。 前述粘合剂聚合物与磁性添加剂一起使用,该磁性添加剂包括(a)含有至少一种铁,钴和镍的无机磁性化合物或(b)含有至少一种铁,钴和镍的有机磁性络合物或( c)表现出磁性的有机电荷转移络合物。 粘合剂(I)与着色剂(颜料)的比例大于1〜10。磁性添加剂的浓度在1〜30重量%的范围内。 一般油墨配方包括:5至50wt%的水混溶性溶剂; 0.5至10重量%的着色剂; 1〜30重量%磁性添加剂; 和水。
    • 59. 发明授权
    • Polymeric binders having saturated ring for improved performance of
single layer positive organic photoconductor
    • 具有饱和环的聚合物粘合剂,用于改善单层正性有机光电导体的性能
    • US6027844A
    • 2000-02-22
    • US506283
    • 1995-07-24
    • Khe C. NguyenSivapackia Ganapathiappan
    • Khe C. NguyenSivapackia Ganapathiappan
    • G03G5/05G03G5/06
    • G03G5/0567G03G5/0532G03G5/0542G03G5/055G03G5/0557G03G5/0589
    • Composites comprising polymeric binders and phthalocyanine pigments to form a single layer positive organic photoconductor are provided for use in electrophotography. The polymeric binders comprise an aliphatic polymer or copolymer having a saturated ring for each repeat unit either included in the polymer chain or pendant therefrom and about 4 to 35% of functional groups such as --OH, --SH, --N NH, and --NH.sub.2 per repeat unit. The saturated ring portion, being essentially non-polar, or at least less polar than an unsaturated ring, maintains the specific morphology of the phthalo-cyanine pigments commonly employed in positive charge organic photoconductors (OPCs) and results in a stable dispersion required for the stable performance of the OPC. Keeping the functional groups listed above to less than about 35% ensures that the photoresponse is not reduced to an unacceptable level. Heating of the composite is used to control the concentration of the functional groups. One or more separate thermal carrier generation control agents comprising compounds containing the functional group(s) may be used to provide part or all of the functional groups in the composite. The resulting composite evidences thermal stability of electronic properties, such as dark decay, at elevated temperatures in the range of about 35.degree. to 75.degree. C.
    • 提供了包含聚合物粘合剂和酞菁颜料以形成单层正性有机光电导体的复合材料用于电子照相术。 聚合物粘合剂包含脂族聚合物或共聚物,其中包含在聚合物链或侧链中的每个重复单元具有饱和环和约4至35%的官能团如-OH,-SH,-NN,NH, 和每个重复单元的-NH 2。 饱和环部分基本上是非极性的,或者至少比不饱和环极性小,维持正电荷有机光电导体(OPCs)中通常使用的酞菁花青素的特定形态,并导致所需的稳定的分散体 OPC的性能稳定。 将上面列出的官能团保持在小于约35%可确保光响应不会降低到不可接受的水平。 使用复合材料的加热来控制官能团的浓度。 包含含有官能团的化合物的一种或多种单独的热载体产生控制剂可用于提供复合材料中的部分或全部官能团。 所得到的复合物证明在约35℃至75℃范围内的升高的温度下的电子性质的热稳定性,例如暗衰变。
    • 60. 发明授权
    • Photoconductor comprising a complex between metal oxide phthalocyanine
compounds and hydroxy or amine compounds
    • 包含金属氧化物酞菁化合物与羟基或胺化合物之间的络合物的感光体
    • US5972552A
    • 1999-10-26
    • US25142
    • 1998-02-18
    • Sivapackia GanapathiappanKhe C. Nguyen
    • Sivapackia GanapathiappanKhe C. Nguyen
    • G03G5/05G03G5/06G03G5/087
    • G03G5/0542G03G5/0696
    • Embodiments of photoconductors and methods of making photoconductors for electrophotography are described, each embodiment comprising a complex between metal oxide phthalocyanine compound(s) and hydroxy compound(s) or amine compound(s). A metal oxide phthalocyanine pigment exhibits extended photoresponse between 850 nm and 1000 nm when it is milled with hydroxy binders or amine binders. The preferred hydroxy or amine binders include a modified poly-vinyl butyral binder unit containing a --CH.sub.2 CH.sub.2 OH unit, a cyclohexanol unit, a --CH.sub.2 CH.sub.2 NH.sub.2 unit, a --CH.sub.2 C.sub.6 H.sub.10 --NH.sub.2 unit, a --CH.sub.2 C.sub.6 H.sub.10 --CH.sub.2 NH.sub.2 unit, a --CH.sub.2 C.sub.6 H.sub.4 --NH.sub.2 unit, or other hydroxy or amine units. Optionally, hydroxy solvents or other hydroxy additives may also be included. Preferably, the pigment is dehydrated or hydroxy-starved before milling with the binder and solvents. The metal oxide phthalocyanine pigments and the hydroxy or amine groups form a complex which extends the photo-response of an OPC to wavelengths beyond about 850 nm, in order to achieve higher xerographic speed with higher resolution.
    • 描述了感光体的实施例和制备用于电子照相术的光电导体的方法,每个实施方案包括金属氧化物酞菁化合物与羟基化合物或胺化合物之间的络合物。 当用羟基粘合剂或胺粘合剂研磨时,金属氧化物酞菁颜料表现出在850nm和1000nm之间的延长的光响应。 优选的羟基或胺粘合剂包括含有-CH 2 CH 2 OH单元,环己醇单元,-CH 2 CH 2 NH 2单元,-CH 2 C 6 H 10 -NH 2单元,-CH 2 C 6 H 10 -CH 2 NH 2单元,-CH 2 C 6 H 4 -NH 2单元,-CH 2 C 6 H 4 -NH 2单元的改性聚乙烯醇缩丁醛粘合剂单元 ,或其它羟基或胺单元。 任选地,也可以包括羟基溶剂或其它羟基添加剂。 优选地,在用粘合剂和溶剂研磨之前,颜料被脱水或羟基饥饿。 金属氧化物酞菁颜料和羟基或胺基形成复合物,其将OPC的光响应扩展到超过约850nm的波长,以便以更高的分辨率获得更高的静电印刷速度。