申请人:Bayer Corporation
公开号:EP0842987A2
公开(公告)日:1998-05-20
This invention relates to a process for the preparation of quinacridone pigments by
(a) heating a reaction mixture comprising
(i) a 2,5-dianilinoterephthalic acid, a 2,5-dianilino-6,13-dihydroterephthalic acid, or a 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid;
(ii) about 0.1 to about 15 percent by weight, based on component (a)(i), of one or more sulfonyl-containing derivatives of 2,5-dianilinoterephthalic acid, 2,5-dianilino-6,13-dihydroterephthalic acid, and/or 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid; and
(iii) about 3 to about 20 parts by weight, per part of component (a)(i), of a dehydrating agent,
with the proviso that if either component (a)(i) or component (a)(ii) is a 2,5-dianilino-6,13-dihydroterephthalic acid or derivative thereof, reaction step (a) additionally comprises an oxidation step;
(b) drowning the reaction mixture from step (a) with a liquid in which the quinacridone pigment is substantially insoluble; and
(c) isolating the quinacridone pigment.
本发明涉及一种通过以下方法制备
喹吖啶酮颜料的工艺
(a) 加热包含以下成分的反应混合物
(i) 2,5-
二苯胺对苯二甲酸、2,5-
二苯胺-6,13-二氢
对苯二甲酸或 2,5-
二苯胺-3,6-二氧代-
1,4-环己二烯-1,4-二
羧酸;
(ii) 以组分(a)(i)为基准,约 0.1%至约 15%(按重量计)的 2,5-
二苯胺对苯二甲酸、2,5-
二苯胺-6,13-二氢
对苯二甲酸和/或 2,5-
二苯胺-3,6-二氧代-
1,4-环己二烯-1,4-二
羧酸的一种或多种含磺酰基的衍
生物;以及
(iii) 每份(a)(i)组分约 3 至约 20 重量份的脱
水剂、
但如果组分(a)(i)或组分(a)(ii)是 2,5-
二苯胺-6,13-二氢
对苯二甲酸或其衍
生物,反应步骤(a)还包括氧化步骤;
(b) 用一种
喹吖啶酮颜料基本上不溶于其中的液体淹没步骤(a)的反应混合物;以及
(c) 分离
喹吖啶酮颜料。