Composition preventing the polymerization of ethylenically unsaturated monomers and the removal thereof before polymerization
US9605203B2 · kind B2 · utility
0Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Sep 11, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention describes a composition that inhibits the polymerization of ethylenically unsaturated monomers, including at least 98% by weight of 4-tert-butylcatechol (4-TBC), 0.03% to 0.2% by weight of catechol (PC), and at least one impurity selected among 3-tert-butylcatechol, tert-butylhydroquinone, 3,5-di-tert-butylcatechol and mixture thereof, the total quantity of said impurities and of the PC being 0.1% to 0.8% by weight of said composition. The invention also describes a method for removing said polymerization-inhibiting composition present in a mixture including at least one ethylenically unsaturated monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.