Hydrolytic process for the preparation of a melt stable polycaprolactam
US4746724A · kind A · utility
3Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the preparation of a caprolactam that is not appreciably subject to re-equilibration during melt spinning of textile fibres. In the process such an amount of chain length regulating agent is used that the relative viscosity of the polyamide increases by not more than 0.5 units after 20 hour heat treatment in the solid phase in an inert gas atmosphere at between 110.degree. C. and 190.degree. C., after extraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.