Use of polyacrylic acids as grinding aids for calcium carbonate
    14.
    发明授权
    Use of polyacrylic acids as grinding aids for calcium carbonate 有权
    使用聚丙烯酸作为碳酸钙的助磨剂

    公开(公告)号:US07297205B2

    公开(公告)日:2007-11-20

    申请号:US10548582

    申请日:2004-03-05

    摘要: The invention relates to the use of polyacrylic acids which contain organic terminal groups containing sulphur, comprising at least two carbon atoms, having an average molecular weight Mw of 5 000-30 000 g/mol and which are at least partially neutralized by a base which is selected from the group of alkali hydroxides and ammonia as auxiliary agents for wet grinding of calcium carbonate. The invention also relates to fine particle aqueous suspensions of calcium carbonate which are produced by wet grinding of calcium carbonate in the presence of said polyacrylic acids.

    摘要翻译: 本发明涉及包含含硫的有机末端基团的聚丙烯酸的用途,所述有机末端基团包含至少两个碳原子,平均分子量M 3至3 000g / mol, 至少部分地被选自碱金属氢氧化物和氨的碱作为湿法研磨碳酸钙的辅助剂中和。 本发明还涉及通过在所述聚丙烯酸存在下湿式研磨碳酸钙而制备的碳酸钙微粒水悬浮液。

    Crystal growth modifiers for perylene pigments
    17.
    发明授权
    Crystal growth modifiers for perylene pigments 失效
    苝颜料的水晶生长改性剂

    公开(公告)号:US5753030A

    公开(公告)日:1998-05-19

    申请号:US645368

    申请日:1996-05-13

    摘要: This invention relates to pigment compositions prepared by precipitating a blend of (a) about 60 to about 95 percent by weight of a perylene pigment having the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl; and (b) about 5 to about 40 percent by weight of a polycyclic aromatic compound containg at least 5 aromatic rings wherein at least one ring is substituted with at least one keto group.

    摘要翻译: 本发明涉及通过沉淀(a)约60至约95重量%的具有下式的苝颜料的共混物制备的颜料组合物:其中R1和R2独立地为C1-C6烷基,C5-C7环烷基,C7 -C16芳烷基或C6-C10芳基; 和(b)约5至约40重量%的包含至少5个芳环的多环芳族化合物,其中至少一个环被至少一个酮基取代。

    Modification of pigment and electrophotographic photoreceptor with
modified pigment
    18.
    发明授权
    Modification of pigment and electrophotographic photoreceptor with modified pigment 失效
    用改性颜料改性颜料和电子照相感光体

    公开(公告)号:US5403687A

    公开(公告)日:1995-04-04

    申请号:US71475

    申请日:1993-06-04

    IPC分类号: C09B67/14 G03G5/06

    摘要: A method of modifying a pigment which comprises dissolving the pigment into sulfuric acid and then mixing water with the pigment-sulfuric acid solution. The modified pigment is excellent in achieving uniform dispersion and has a small particle size. An electrophotographic photoreceptor containing the modified pigment as the organic photoconductor has uniform sensitivity, sufficient charge acceptance and small dark decay.

    摘要翻译: 一种改性颜料的方法,其包括将颜料溶解在硫酸中,然后将水与颜料 - 硫酸溶液混合。 改性颜料的均匀分散性优异,粒径小。 包含改性颜料作为有机光电导体的电子照相感光体具有均匀的灵敏度,足够的电荷接受性和小的暗衰变。

    Preparation of stable solutions of azo dyes of m-phenylenediamine by
reaction with formic acid
    20.
    发明授权
    Preparation of stable solutions of azo dyes of m-phenylenediamine by reaction with formic acid 失效
    通过与甲酸反应制备间苯二胺偶氮染料的稳定溶液

    公开(公告)号:US4952680A

    公开(公告)日:1990-08-28

    申请号:US181577

    申请日:1988-04-14

    申请人: Karl Schmeidl

    发明人: Karl Schmeidl

    摘要: Stable solutions of azo dyes obtained by diazotizing and coupling m-phenylenediamine or derivatives thereof are prepared after the reaction has ended by treating the resulting reaction mixture with from 0.1 to 1.2 moles of formic acid, based on 1 mole of m-phenylenediamine, at from 60.degree. C. to the boiling point of the reaction mixture.

    摘要翻译: 通过重氮化和偶联间苯二胺或其衍生物得到的偶氮染料的稳定溶液在反应结束后通过用0.1至1.2摩尔甲酸(基于1摩尔间苯二胺)处理得到的反应混合物来制备, 60℃至反应混合物的沸点。