Unsymmetrical azonitriles
AssigneeWako Pure Chemical Industries, Ltd.
InventorsJoji Nagaoka, Kazuhiko Yamashita, Nobuaki Minamii, Tsutomu Miyagawa, Masahiko Sugano
Life of this patent
Estimating the term…
Abstract
Unsymmetrical azonitriles of the formula, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently straight- or branched-chain alkyl having 1 to 7 carbon atoms or alkoxy substituted straight- or branched-chain alkyl having 2 to 11 carbon atoms but at least one of R.sup.1 and R.sup.2 and at least one of R.sup.3 and R.sup.4 must be different, have good efficiency as initiator for polymerizations or copolymerizations of vinyl monomers. These unsymmetrical azonitriles can be prepared by oxidizing a corresponding unsymmetrical hydrazo compound.
Claims7
An unsymmetrical azonitrile of the formula ##STR18## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently straight- or branched-chain alkyl having 1 to 7 carbon atoms or alkoxy substituted straight- or branched-chain alkyl having 2 to 11 carbon atoms provided that R.sup.1 is different than R.sup.3 when R.sup.2 is the same as R.sup.4 and R.sup.1 is different than R.sup.4 when R.sup.2 is the same as R.sup.3.
Dependencies are inferred from the claim text.