Acid donors for dyeing polyamide
US7728067B2 · kind B2 · utility
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4References
13Claims
0Family size
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Key dates
| Filing date | Apr 25, 2005 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Jan 15, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An adjuvant composition comprising (A) a C1-C2carboxylic acid ester of a polyhydroxy compound containing from 2 to 20 hydroxyl groups and (B) an N-heterocyclic compound having a pKa, value of from 6 to 8 is storage-stable and suitable as an acid donor in the dyeing of polyamides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.