Metal surfaces to inhibit ethylenically unsaturated monomer polymerization
US7906679B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Nov 27, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Materials for making apparatus and a method of inhibiting polymerization during manufacture, purification, handling and storage of subject ethylenically unsaturated monomers are disclosed. In particular, copper or metals containing copper, in the presence of oxygen, have inhibit undesired polymerization resulting in polymer fouling in apparatus used during the manufacture, purification, handling and storage of the monomers, such as acrylic acid, methacrylic acid, acrylic acid esters and methacrylic acid esters. The copper or copper alloys as described herein, in the presence of an oxygen-containing gas, exhibit self-inhibiting surface characteristics when used to make at least a portion of the apparatus to inhibit polymerization of the monomers in contact with the portion of the apparatus including such copper-containing metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.