Method of stabilizing polymerizable compounds

US9206109B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tobias Johannes Korn · Ludwigshafen, DE
• Peter Zurowski · Landau, DE
• Thorsten Friese · Mannheim, DE
• Sylke Haremza · Neckargemünd, DE
• Ulrich Jaeger · Münstermaifeld, DE
• Steffen Rissel · Tauberbischofsheim, DE
• Volker Schliephake · Schifferstadt, DE

Key dates

• Filing date: Dec 12, 2013
• Grant date: Dec 8, 2015
• Expiry date: Dec 12, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a method of stabilizing acrylic compounds, a liquid phase containing at least one acrylic compound is mixed with at least one metal and at least one ligand. The acrylic compound can be acrylic acid, methacrylic acid, and their respective esters. The metal can be copper, manganese, and cerium. The ligand can be a quinoline compound of formula (I), an N-oxide of a compound of formula (I), 2,2″-bis(2,3-dihydro-3-oxoindolylidene), or an aliphatic y-dentate ligand with y being 2-6 and comprising at least two nitrogen atoms joined by aliphatic or aromatic C1-C4 bridges comprising y-2 further coordinating nitrogen atoms or heteroatoms:where X is OH, NH2, O—(C1-C4)-alkyl, O—C(O)—(C1-C4)-alkyl, or O—C(O)-phenyl; R1 is H, or (C1-C4)-alkyl; R2 is H, (C1-C4)-alkyl, Cl, Br, or SO3H; and R3 is H, Cl or Br.