Derivatives of 1-oxyl-4-hydroxy-2,2,6,6-tetramethylpiperidine as polymerization inhibitors for (meth)acrylate monomers
US5932735A · kind A · utility
11Cited by
7References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1998 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jun 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/50
- 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.