Viscose spin bath additive of an amphoteric surfactant
US6379598B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 4, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F2/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of reducing the clogging of nozzles and slits and diminishing the formation of deposits in a spin bath system in a process of making viscose filamentary and film materials by using, as a spin bath additive, an amphoteric surfactant having the formula I, and a spin bath system including an amphoteric surfactant having the formula IRNA (CnH2nNA)x−1A  (I)where R represents a hydrogen or an aliphatic group with 1-24 carbon atoms, each A represents a hydrogen, an aliphatic group with 1-24 carbon atoms, or BOOCCmH2m— groups, where m is a number from 1-3, B is hydrogen or a salt forming cation, n is a number from 2-3, x is 1-8, and the number of BOOCCmH2m— groups are from 1 to x+2, with the provision that the total number of carbon atoms in the aliphatic groups is from 8 to 45. The amphoteric surfactant has an excellent anticlogging effect, since it is a good dispersant and prevents or reduces precipitation in the spin bath. In addition it exhibits low foaming and is very stable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.