Derivatives of 1-oxyl-4-amino-2,2,6,6-tetramethylpiperidine as polymerization inhibitors for (meth)acrylate monomers
US5928558A · kind A · utility
7Cited by
3References
37Claims
0Family size
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Inventors
Key dates
| Filing date | Apr 23, 1998 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Apr 23, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/94
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-4-aminopiperidine 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.