Invention Grant
US5782935A Process for coloring polytrimethylene terephthalate fibres and use of
the fibres colored by this process
失效
聚对苯二甲酸丙二醇酯纤维的着色方法和使用该方法着色的纤维
- Patent Title: Process for coloring polytrimethylene terephthalate fibres and use of the fibres colored by this process
- Patent Title (中): 聚对苯二甲酸丙二醇酯纤维的着色方法和使用该方法着色的纤维
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Application No.: US696995Application Date: 1996-12-12
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Publication No.: US5782935APublication Date: 1998-07-21
- Inventor: Peter Hirt , Gilbert Kuhl , Hermann Piana , Hansjorg Traub , Heinz Herlinger
- Applicant: Peter Hirt , Gilbert Kuhl , Hermann Piana , Hansjorg Traub , Heinz Herlinger
- Applicant Address: DEX Frankfurt
- Assignee: Degussa Aktiengesellschaft
- Current Assignee: Degussa Aktiengesellschaft
- Current Assignee Address: DEX Frankfurt
- Priority: DEX4405407.6 19940221
- Main IPC: C08L67/02
- IPC: C08L67/02 ; D06P1/00 ; D06P1/16 ; D06P3/54 ; D06P5/20
Abstract:
The present invention relates to a process for coloring polytrimethylene terephthalate fibers by treating the fibers with an aqueous liquor containing at least one dispersing colorant, in the absence of a carrier and the application of pressure. The temperature of the treatment is carried out at or below the boiling point of the liquid, within 20.degree. C. of the boiling point of the liquor. The coloring process begins at a liquor temperature between 20.degree. and 50.degree. C., and the temperature is raised over a period of 20 to 90 minutes. The liquor is then cooled to a temperature between 20.degree. and 50.degree. C., preferably at a rate of cooling of 1.degree. C. per minute, so that at least 95% wt. % of the colorant is absorbed by the fibers, and the dispersing colorant penetrates the fibers to a relative depth of at least 5% with respect to the diameter of the fibers.
Public/Granted literature
- US5395605A Low water uptake precipitated silica particulates Public/Granted day:1995-03-07
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