Polycyclic pyromellitates and use thereof on polyesters and polyamides
US4435294A · kind A · utility
5Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2969
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Oligomers containing pyromellitic rings, divalent linking groups, pendant fluoroalkoxy or hydrocarbon alkoxy groups and pendant polar groups of various kinds impart soil repellency to fibers that persists after repeated laundering. An exemplary material is prepared by the reaction of pyromellitic difluoroester/diacid chloride with 1,4-butanediol (the linking group) and 3-chloro-1,2-propanediol (the pendant polar group).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.