Catalysts and processes for formaldehyde-free durable press finishing of cotton textiles with polycarboxylic acids
US4820307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1988 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Jun 16, 2008 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M13/203
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Catalysts for the rapid esterification and crosslinking of fibrous cellulose in textile form by polycarboxylic acids at elevated temperatures are disclosed. The catalysts are acidic or weakly basic salts selected from the alkali metal dihydrogen phosphates and alkali metal salts of phosphorous, hypophosphorous, and polyphosphoric acids. Suitable polycarboxylic acids include saturated, unsaturated and aromatic acids, as well as alpha-hydroxy acids. The textiles so treated exhibit high levels of wrinkle resistance and smooth drying properties durable to repeated laundering in alkaline detergents, and do not contain or release formaldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.