Derivatives of 1-oxyl-4-hydroxy-2,2,6,6-tetramethylpiperidine
US6080864A · kind A · utility
2Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1999 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Feb 1, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine are surprisingly effective as inhibitors to prevent the premature polymerization of acrylic and methacrylic acids, their esters, their amides, vinyl acetate and acrylonitrile in the presence of water. Some of these derivatives are new compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.