The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 1991
Filed:
Jan. 11, 1990
Gerald Fleischmann, Burghausen, DE;
Herbert Eck, Burghausen, DE;
Wacker-Chemie GmbH, Munich, DE;
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.