Fluorescent whitening agent
US6133215A · kind A · utility
5Cited by
1References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Aug 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/42
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a white crystal form of the compound having the formula: ##STR1## whose crystal form is characterised by an X-ray diffraction diagram which is essentially as shown in Table I, II or III. Also provided is a formulation comprising from 10 to 85% by weight of the white crystal form of compound having the formula (1) and from 90 to 15% by weight of a polyhydroxy compound, preferably glycerine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.