Process for the polymerization of polar compounds

US5003015A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Gerald Fleischmann · Emmerting, DE
• Herbert Eck · Burghausen, DE

Key dates

• Filing date: Jan 11, 1990
• Grant date: Mar 26, 1991
• Expiry date: Jan 11, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/42
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to an improved process for the polymerization of polar compounds which have a C.dbd.C double bond in the .alpha.-position to a carbonyl, nitrile, sulfone, phosphone or nitro group, such as, for example, acrylic acid derivatives, .alpha.-nitroolefins, vinyl sulfone derivatives and vinyl phosphonic acid esters. The quasi-ionic polymerization is initiated by organometallic compounds of silicon, germanium and tin as initiators together with nucleophilic or electrophilic catalysts, and is carried out at temperatures in the range of from -100.degree. C. to +100.degree. C., in which the initiators are selected from silanes, germanes, stannanes, siloxanes, germoxanes or stannoxanes having at least one metal-bonded allyl or propargyl group, which may be substituted by hydrocarbon groups, per metal atom.