Process for increasing the relative viscosity of polycaprolactam with phosphite compound
US4433116A · kind A · utility
8Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1982 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Dec 27, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/48
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for rapidly and substantially decreasing the melt index and increasing the viscosity of polymers of caprolactams during melt processing by forming a molten mixture of the polymer and a phosphite compound and heating the mixture until the desired change in melt index and viscosity are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.