发明授权
- 专利标题: Aqueous dye preparations containing coumarin dyes
- 专利标题(中): 含有香豆素染料的水性染料制剂
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申请号: US398767申请日: 1995-03-06
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公开(公告)号: US5531797A公开(公告)日: 1996-07-02
- 发明人: Rudolf Bermes , Walter Breitschaft
- 申请人: Rudolf Bermes , Walter Breitschaft
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4407496.4 19940307
- 主分类号: C09B57/02
- IPC分类号: C09B57/02 ; C09B67/26 ; D06P3/60 ; C09B7/02 ; D06P1/40
摘要:
Aqueous dye preparations contain from 12 to 30% by weight, based on the weight of the preparation and calculated as free acid, of a dye of the formula ##STR1## where L.sup.1 and L.sup.2 are each C.sub.1 -C.sub.4 -alkyl and Cat.sup..sym. is an alkali metal ion or an unsubstituted or substituted ammonium ion, and are used for coloring paper stocks.
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