Invention Grant
- Patent Title: Inorganic optical brightener
- Patent Title (中): 无机荧光增白剂
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Application No.: US12226296Application Date: 2007-04-10
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Publication No.: US08945239B2Publication Date: 2015-02-03
- Inventor: Christian Fabian , Bernhard Seider , Hans Reichert
- Applicant: Christian Fabian , Bernhard Seider , Hans Reichert
- Applicant Address: US NY Tarrytown
- Assignee: Ciba Corp.
- Current Assignee: Ciba Corp.
- Current Assignee Address: US NY Tarrytown
- Agent Shruti Costales
- Priority: EP06112757 20060419
- International Application: PCT/EP2007/053439 WO 20070410
- International Announcement: WO2007/118813 WO 20071025
- Main IPC: D06L3/12
- IPC: D06L3/12 ; C11D3/42 ; C09K11/77 ; D21H21/30 ; C08K3/32
Abstract:
The invention relates to novel inorganic brighteners, a process for their preparation and their use for brightening substrates. More specifically, the novel inorganic brighteners are phosphors characterized in that they have (i) an absorption maximum in the range of from 350 to 375 nm; (ii) a steep decrease of the absorption band near 400 nm; (iii) a quantum yield of the phosphorescence of at least 0.8; and (iv) a phosphorescence maximum in the range between 415 and 445 nm.
Public/Granted literature
- US20090137445A1 Inorganic Optical Brightener Public/Granted day:2009-05-28
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