Process for stabilizing ethylenically unsaturated compounds and stabilized monomer compositions
US5258138A · kind A · utility
21Cited by
15References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 2, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Oct 2, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for stabilizing an ethylenically unsaturated monomer or oligomer from premature polymerization is disclosed whereby a stabilizing amount of an amine, preferably a substituted hindered amine, in combination with phenothiazine or other related heterocyclic moiety is added to said polymerizable monomer or oligomer. The ethylenically unsaturated monomer or oligomer encompass vinyl monomers or oligomers bearing at least one polymerizable moiety. The combination of substituted hindered amine plus phenothiazine inhibits premature polymerization in the liquid and/or vapor phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.