发明授权
- 专利标题: Stable liquid dyestuff preparations
- 专利标题(中): 稳定的液体染料制剂
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申请号: US28308472申请日: 1972-08-23
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公开(公告)号: US3909192A公开(公告)日: 1975-09-30
- 发明人: GERTISSER BERTHOLD
- 申请人: SANDOZ LTD
- 专利权人: Sandoz Ltd
- 当前专利权人: Sandoz Ltd
- 优先权: US28308472 1972-08-23; US21508172 1972-01-03
- 主分类号: C09B67/34
- IPC分类号: C09B67/34 ; D06P3/52 ; D06P3/76 ; D06P3/79 ; D06P1/68
摘要:
The invention provides novel stable, liquid dyestuff preparations comprising (a) at least one basic dyestuff of the polymethine series present in the form of a salt of an inorganic acid or of an alkylsulphuric acid in which the alkyl radical contains 1 to 4 carbon atoms, (b) at least one water-soluble organic acid and (c) gamma -butyrolactone. The preparations are useful for dyeing polyacrylonitrile, acrylonitrile copolymer, polyester and polypropylene fibres.
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