Process for polymerizing polar compounds

Details Process for polymerizing polar compounds Process for polymerizing polar compounds

1991-12-23

1993-05-11

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526194, 5263297, C08F 416

Patent

active

052101622

ABSTRACT:
A process for polymerizing polar compounds which have a C.dbd.C double bond in an .alpha.-position relative to a carbonyl or nitrile group, such as acrylic acid derivatives, which comprises polymerizing the polar compounds in the presence of organometallic compounds of silicon, germanium or tin as initiators together with a nucleophilic or electrophilic catalyst at temperatures in the range of from -100.degree. C. to +100.degree. C. The initiators used in the quasi-ionic polymerization are selected from group (I) consisting of cyclic silazanes, polymeric silazanes which contain more than two silazanyl groups per molecule, cyclic siloxanes and polymeric siloxanes which contain more than two siloxanyl groups per molecule and at least one Si-bonded hydrogen atom and silanes having at least one Si-bonded N atom in the form of secondary or tertiary amido groups or at least one Si-bonded carbon atom in the form of alkynyl or cyclodienyl groups for each Si atom, or group (II) consisting of silanes having at least three silyl groups per molecule, germanes, stannanes or siloxanes, germoxanes or stannoxanes, in which at least one metal-bonded hydrocarbyloxy group is present for each metal atom.

REFERENCES:
patent: 4771117 (1988-09-01), Citron et al.
patent: 4822859 (1989-04-01), Sogah
patent: 4940760 (1990-07-01), Boettcher et al.

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