Bulk dyeing of plastics
US5626633A · kind A · utility
9Cited by
12References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1995 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Dec 1, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B23/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyestuffs of the formula (I) ##STR1## wherein n denotes 1 or 2, T denotes O or N--R.sub.0, wherein R.sub.0 denotes H, alkyl, aryl or acyl or, together with R.sub.2 or R.sub.3, forms a 5- to 7-membered ring, R.sub.1 if n=1, denotes aryl, hetaryl or heterocyclylidenemethyl and PA1 if n=2, denotes a direct bond or arylene and R.sub.2 and R.sub.3 are independent or cyclic radicals having the meanings given in the description, are employed for bulk dyeing of plastics, preferably thermoplastics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.