Process and formulation for producing a polyamide having low caprolactam concentration and specific relative viscosity
US11345815B2 · kind B2 · utility
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4References
12Claims
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Key dates
| Filing date | Aug 20, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Dec 6, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J31/0261
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A base polyamide composition comprising a nylon mixture having caprolactam units from 1 wppb to 50 wppm catalyst composition; and greater than 0.75 wt % residual caprolactam, wherein the base polyamide composition has a delta end group level ranging from 30 μeq/gram to 90 μeq/gram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.